--- /dev/null
+/* Native support for the SGI Iris running IRIX version 5, for GDB.
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
+ and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
+ Implemented for Irix 4.x by Garrett A. Wollman.
+ Modified for Irix 5.x by Ian Lance Taylor.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "defs.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "target.h"
+
+#include <sys/time.h>
+#include <sys/procfs.h>
+#include <setjmp.h> /* For JB_XXX. */
+
+/* Size of elements in jmpbuf */
+
+#define JB_ELEMENT_SIZE 4
+
+/*
+ * See the comment in m68k-tdep.c regarding the utility of these functions.
+ *
+ * These definitions are from the MIPS SVR4 ABI, so they may work for
+ * any MIPS SVR4 target.
+ */
+
+void
+supply_gregset (gregsetp)
+ gregset_t *gregsetp;
+{
+ register int regi;
+ register greg_t *regp = &(*gregsetp)[0];
+
+ for(regi = 0; regi <= CTX_RA; regi++)
+ supply_register (regi, (char *)(regp + regi));
+
+ supply_register (PC_REGNUM, (char *)(regp + CTX_EPC));
+ supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI));
+ supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO));
+ supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE));
+}
+
+void
+fill_gregset (gregsetp, regno)
+ gregset_t *gregsetp;
+ int regno;
+{
+ int regi;
+ register greg_t *regp = &(*gregsetp)[0];
+
+ for (regi = 0; regi <= CTX_RA; regi++)
+ if ((regno == -1) || (regno == regi))
+ *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
+
+ if ((regno == -1) || (regno == PC_REGNUM))
+ *(regp + CTX_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+
+ if ((regno == -1) || (regno == CAUSE_REGNUM))
+ *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
+
+ if ((regno == -1) || (regno == HI_REGNUM))
+ *(regp + CTX_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
+
+ if ((regno == -1) || (regno == LO_REGNUM))
+ *(regp + CTX_MDLO) = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
+}
+
+/*
+ * Now we do the same thing for floating-point registers.
+ * We don't bother to condition on FP0_REGNUM since any
+ * reasonable MIPS configuration has an R3010 in it.
+ *
+ * Again, see the comments in m68k-tdep.c.
+ */
+
+void
+supply_fpregset (fpregsetp)
+ fpregset_t *fpregsetp;
+{
+ register int regi;
+
+ for (regi = 0; regi < 32; regi++)
+ supply_register (FP0_REGNUM + regi,
+ (char *)&fpregsetp->fp_r.fp_regs[regi]);
+
+ supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
+
+ /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
+}
+
+void
+fill_fpregset (fpregsetp, regno)
+ fpregset_t *fpregsetp;
+ int regno;
+{
+ int regi;
+ char *from, *to;
+
+ for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
+ {
+ if ((regno == -1) || (regno == regi))
+ {
+ from = (char *) ®isters[REGISTER_BYTE (regi)];
+ to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
+ memcpy(to, from, REGISTER_RAW_SIZE (regi));
+ }
+ }
+
+ if ((regno == -1) || (regno == FCRCS_REGNUM))
+ fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)];
+}
+
+
+/* Figure out where the longjmp will land.
+ We expect the first arg to be a pointer to the jmp_buf structure from which
+ we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
+ This routine returns true on success. */
+
+int
+get_longjmp_target (pc)
+ CORE_ADDR *pc;
+{
+ char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+ CORE_ADDR jb_addr;
+
+ jb_addr = read_register (A0_REGNUM);
+
+ if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
+ TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ return 0;
+
+ *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+
+ return 1;
+}
+
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+ char *core_reg_sect;
+ unsigned core_reg_size;
+ int which; /* Unused */
+ unsigned int reg_addr; /* Unused */
+{
+ if (core_reg_size != REGISTER_BYTES)
+ {
+ warning ("wrong size gregset struct in core file");
+ return;
+ }
+
+ memcpy ((char *)registers, core_reg_sect, core_reg_size);
+}
+\f
+/* Irix 5 uses what appears to be a unique form of shared library
+ support. This is a copy of solib.c modified for Irix 5. */
+
+#include <sys/types.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/param.h>
+#include <fcntl.h>
+
+/* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts
+ with our versions of those files included by tm-mips.h. Prevent
+ <obj.h> from including them with some appropriate defines. */
+#define __SYM_H__
+#define __SYMCONST_H__
+#include <obj.h>
+
+#include "symtab.h"
+#include "bfd.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "command.h"
+#include "frame.h"
+#include "regex.h"
+#include "inferior.h"
+#include "language.h"
+
+/* We need to set a breakpoint at a point when we know that the
+ mapping of shared libraries is complete. dbx simply breaks at main
+ (or, for FORTRAN, MAIN__), so we do the same. We can not break at
+ the very beginning of main, because the startup code will jump into
+ main after the GP initialization instructions. SOLIB_BKPT_OFFSET
+ is used to skip those instructions. */
+
+#define SOLIB_BKPT_OFFSET 12
+
+static char *bkpt_names[] = {
+ "main",
+ "MAIN__",
+ NULL
+};
+
+/* The symbol which starts off the list of shared libraries. */
+#define DEBUG_BASE "__rld_obj_head"
+
+/* How to get the loaded address of a shared library. */
+#define LM_ADDR(so) ((so)->lm.o_base_address)
+
+char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
+
+extern CORE_ADDR sigtramp_address, sigtramp_end;
+
+struct so_list {
+ struct so_list *next; /* next structure in linked list */
+ struct obj_list ll;
+ struct obj lm; /* copy of link map from inferior */
+ struct obj_list *lladdr; /* addr in inferior lm was read from */
+ CORE_ADDR lmend; /* upper addr bound of mapped object */
+ char symbols_loaded; /* flag: symbols read in yet? */
+ char from_tty; /* flag: print msgs? */
+ struct objfile *objfile; /* objfile for loaded lib */
+ struct section_table *sections;
+ struct section_table *sections_end;
+ struct section_table *textsection;
+ bfd *abfd;
+};
+
+static struct so_list *so_list_head; /* List of known shared objects */
+static CORE_ADDR debug_base; /* Base of dynamic linker structures */
+static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
+
+/* Local function prototypes */
+
+static void
+sharedlibrary_command PARAMS ((char *, int));
+
+static int
+enable_break PARAMS ((void));
+
+static int
+disable_break PARAMS ((void));
+
+static void
+info_sharedlibrary_command PARAMS ((char *, int));
+
+static int
+symbol_add_stub PARAMS ((char *));
+
+static struct so_list *
+find_solib PARAMS ((struct so_list *));
+
+static struct obj_list *
+first_link_map_member PARAMS ((void));
+
+static CORE_ADDR
+locate_base PARAMS ((void));
+
+static void
+solib_map_sections PARAMS ((struct so_list *));
+
+/*
+
+LOCAL FUNCTION
+
+ solib_map_sections -- open bfd and build sections for shared lib
+
+SYNOPSIS
+
+ static void solib_map_sections (struct so_list *so)
+
+DESCRIPTION
+
+ Given a pointer to one of the shared objects in our list
+ of mapped objects, use the recorded name to open a bfd
+ descriptor for the object, build a section table, and then
+ relocate all the section addresses by the base address at
+ which the shared object was mapped.
+
+FIXMES
+
+ In most (all?) cases the shared object file name recorded in the
+ dynamic linkage tables will be a fully qualified pathname. For
+ cases where it isn't, do we really mimic the systems search
+ mechanism correctly in the below code (particularly the tilde
+ expansion stuff?).
+ */
+
+static void
+solib_map_sections (so)
+ struct so_list *so;
+{
+ char *filename;
+ char *scratch_pathname;
+ int scratch_chan;
+ struct section_table *p;
+ struct cleanup *old_chain;
+ bfd *abfd;
+
+ filename = tilde_expand (so -> lm.o_path);
+ old_chain = make_cleanup (free, filename);
+
+ scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
+ &scratch_pathname);
+ if (scratch_chan < 0)
+ {
+ scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename,
+ O_RDONLY, 0, &scratch_pathname);
+ }
+ if (scratch_chan < 0)
+ {
+ perror_with_name (filename);
+ }
+ /* Leave scratch_pathname allocated. abfd->name will point to it. */
+
+ abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
+ if (!abfd)
+ {
+ close (scratch_chan);
+ error ("Could not open `%s' as an executable file: %s",
+ scratch_pathname, bfd_errmsg (bfd_error));
+ }
+ /* Leave bfd open, core_xfer_memory and "info files" need it. */
+ so -> abfd = abfd;
+ abfd -> cacheable = true;
+
+ if (!bfd_check_format (abfd, bfd_object))
+ {
+ error ("\"%s\": not in executable format: %s.",
+ scratch_pathname, bfd_errmsg (bfd_error));
+ }
+ if (build_section_table (abfd, &so -> sections, &so -> sections_end))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ bfd_get_filename (exec_bfd), bfd_errmsg (bfd_error));
+ }
+
+ for (p = so -> sections; p < so -> sections_end; p++)
+ {
+ /* Relocate the section binding addresses as recorded in the shared
+ object's file by the base address to which the object was actually
+ mapped. */
+ p -> addr += (CORE_ADDR) LM_ADDR (so);
+ p -> endaddr += (CORE_ADDR) LM_ADDR (so);
+ so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
+ if (STREQ (p -> sec_ptr -> name, ".text"))
+ {
+ so -> textsection = p;
+ }
+ }
+
+ /* Free the file names, close the file now. */
+ do_cleanups (old_chain);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ locate_base -- locate the base address of dynamic linker structs
+
+SYNOPSIS
+
+ CORE_ADDR locate_base (void)
+
+DESCRIPTION
+
+ For both the SunOS and SVR4 shared library implementations, if the
+ inferior executable has been linked dynamically, there is a single
+ address somewhere in the inferior's data space which is the key to
+ locating all of the dynamic linker's runtime structures. This
+ address is the value of the symbol defined by the macro DEBUG_BASE.
+ The job of this function is to find and return that address, or to
+ return 0 if there is no such address (the executable is statically
+ linked for example).
+
+ For SunOS, the job is almost trivial, since the dynamic linker and
+ all of it's structures are statically linked to the executable at
+ link time. Thus the symbol for the address we are looking for has
+ already been added to the minimal symbol table for the executable's
+ objfile at the time the symbol file's symbols were read, and all we
+ have to do is look it up there. Note that we explicitly do NOT want
+ to find the copies in the shared library.
+
+ The SVR4 version is much more complicated because the dynamic linker
+ and it's structures are located in the shared C library, which gets
+ run as the executable's "interpreter" by the kernel. We have to go
+ to a lot more work to discover the address of DEBUG_BASE. Because
+ of this complexity, we cache the value we find and return that value
+ on subsequent invocations. Note there is no copy in the executable
+ symbol tables.
+
+ Irix 5 is basically like SunOS.
+
+ Note that we can assume nothing about the process state at the time
+ we need to find this address. We may be stopped on the first instruc-
+ tion of the interpreter (C shared library), the first instruction of
+ the executable itself, or somewhere else entirely (if we attached
+ to the process for example).
+
+ */
+
+static CORE_ADDR
+locate_base ()
+{
+ struct minimal_symbol *msymbol;
+ CORE_ADDR address = 0;
+
+ msymbol = lookup_minimal_symbol (DEBUG_BASE, symfile_objfile);
+ if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
+ {
+ address = SYMBOL_VALUE_ADDRESS (msymbol);
+ }
+ return (address);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ first_link_map_member -- locate first member in dynamic linker's map
+
+SYNOPSIS
+
+ static struct link_map *first_link_map_member (void)
+
+DESCRIPTION
+
+ Read in a copy of the first member in the inferior's dynamic
+ link map from the inferior's dynamic linker structures, and return
+ a pointer to the copy in our address space.
+*/
+
+static struct obj_list *
+first_link_map_member ()
+{
+ struct obj_list *lm;
+ struct obj_list s;
+
+ read_memory (debug_base, (char *) &lm, sizeof (struct obj_list *));
+
+ if (lm == NULL)
+ return NULL;
+
+ /* The first entry in the list is the object file we are debugging,
+ so skip it. */
+ read_memory ((CORE_ADDR) lm, (char *) &s, sizeof (struct obj_list));
+
+ return s.next;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ find_solib -- step through list of shared objects
+
+SYNOPSIS
+
+ struct so_list *find_solib (struct so_list *so_list_ptr)
+
+DESCRIPTION
+
+ This module contains the routine which finds the names of any
+ loaded "images" in the current process. The argument in must be
+ NULL on the first call, and then the returned value must be passed
+ in on subsequent calls. This provides the capability to "step" down
+ the list of loaded objects. On the last object, a NULL value is
+ returned.
+ */
+
+static struct so_list *
+find_solib (so_list_ptr)
+ struct so_list *so_list_ptr; /* Last lm or NULL for first one */
+{
+ struct so_list *so_list_next = NULL;
+ struct obj_list *lm = NULL;
+ struct so_list *new;
+
+ if (so_list_ptr == NULL)
+ {
+ /* We are setting up for a new scan through the loaded images. */
+ if ((so_list_next = so_list_head) == NULL)
+ {
+ /* We have not already read in the dynamic linking structures
+ from the inferior, lookup the address of the base structure. */
+ debug_base = locate_base ();
+ if (debug_base != 0)
+ {
+ /* Read the base structure in and find the address of the first
+ link map list member. */
+ lm = first_link_map_member ();
+ }
+ }
+ }
+ else
+ {
+ /* We have been called before, and are in the process of walking
+ the shared library list. Advance to the next shared object. */
+ if ((lm = so_list_ptr->ll.next) == NULL)
+ {
+ /* We have hit the end of the list, so check to see if any were
+ added, but be quiet if we can't read from the target any more. */
+ int status = target_read_memory ((CORE_ADDR) so_list_ptr -> lladdr,
+ (char *) &(so_list_ptr -> ll),
+ sizeof (struct obj_list));
+ if (status == 0)
+ {
+ lm = so_list_ptr->ll.next;
+ }
+ else
+ {
+ lm = NULL;
+ }
+ }
+ so_list_next = so_list_ptr -> next;
+ }
+ if ((so_list_next == NULL) && (lm != NULL))
+ {
+ /* Get next link map structure from inferior image and build a local
+ abbreviated load_map structure */
+ new = (struct so_list *) xmalloc (sizeof (struct so_list));
+ memset ((char *) new, 0, sizeof (struct so_list));
+ new -> lladdr = lm;
+ /* Add the new node as the next node in the list, or as the root
+ node if this is the first one. */
+ if (so_list_ptr != NULL)
+ {
+ so_list_ptr -> next = new;
+ }
+ else
+ {
+ so_list_head = new;
+ }
+ so_list_next = new;
+ read_memory ((CORE_ADDR) lm, (char *) &(new -> ll),
+ sizeof (struct obj_list));
+ read_memory ((CORE_ADDR) new->ll.data, (char *) &(new -> lm),
+ sizeof (struct obj));
+ solib_map_sections (new);
+ }
+ return (so_list_next);
+}
+
+/* A small stub to get us past the arg-passing pinhole of catch_errors. */
+
+static int
+symbol_add_stub (arg)
+ char *arg;
+{
+ register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
+
+ so -> objfile = symbol_file_add (so -> lm.o_path, so -> from_tty,
+ (unsigned int) so -> textsection -> addr,
+ 0, 0, 0);
+ return (1);
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ solib_add -- add a shared library file to the symtab and section list
+
+SYNOPSIS
+
+ void solib_add (char *arg_string, int from_tty,
+ struct target_ops *target)
+
+DESCRIPTION
+
+*/
+
+void
+solib_add (arg_string, from_tty, target)
+ char *arg_string;
+ int from_tty;
+ struct target_ops *target;
+{
+ register struct so_list *so = NULL; /* link map state variable */
+
+ /* Last shared library that we read. */
+ struct so_list *so_last = NULL;
+
+ char *re_err;
+ int count;
+ int old;
+
+ if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
+ {
+ error ("Invalid regexp: %s", re_err);
+ }
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+ /* Not to mention where _sigtramp is. */
+ sigtramp_address = 0;
+
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> lm.o_path[0] && re_exec (so -> lm.o_path))
+ {
+ so -> from_tty = from_tty;
+ if (so -> symbols_loaded)
+ {
+ if (from_tty)
+ {
+ printf_unfiltered ("Symbols already loaded for %s\n", so -> lm.o_path);
+ }
+ }
+ else if (catch_errors
+ (symbol_add_stub, (char *) so,
+ "Error while reading shared library symbols:\n",
+ RETURN_MASK_ALL))
+ {
+ so_last = so;
+ so -> symbols_loaded = 1;
+ }
+ }
+ }
+
+ /* Now add the shared library sections to the section table of the
+ specified target, if any. */
+ if (target)
+ {
+ /* Count how many new section_table entries there are. */
+ so = NULL;
+ count = 0;
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> lm.o_path[0])
+ {
+ count += so -> sections_end - so -> sections;
+ }
+ }
+
+ if (count)
+ {
+ /* Reallocate the target's section table including the new size. */
+ if (target -> to_sections)
+ {
+ old = target -> to_sections_end - target -> to_sections;
+ target -> to_sections = (struct section_table *)
+ xrealloc ((char *)target -> to_sections,
+ (sizeof (struct section_table)) * (count + old));
+ }
+ else
+ {
+ old = 0;
+ target -> to_sections = (struct section_table *)
+ xmalloc ((sizeof (struct section_table)) * count);
+ }
+ target -> to_sections_end = target -> to_sections + (count + old);
+
+ /* Add these section table entries to the target's table. */
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> lm.o_path[0])
+ {
+ count = so -> sections_end - so -> sections;
+ memcpy ((char *) (target -> to_sections + old),
+ so -> sections,
+ (sizeof (struct section_table)) * count);
+ old += count;
+ }
+ }
+ }
+ }
+}
+
+/*
+
+LOCAL FUNCTION
+
+ info_sharedlibrary_command -- code for "info sharedlibrary"
+
+SYNOPSIS
+
+ static void info_sharedlibrary_command ()
+
+DESCRIPTION
+
+ Walk through the shared library list and print information
+ about each attached library.
+*/
+
+static void
+info_sharedlibrary_command (ignore, from_tty)
+ char *ignore;
+ int from_tty;
+{
+ register struct so_list *so = NULL; /* link map state variable */
+ int header_done = 0;
+
+ if (exec_bfd == NULL)
+ {
+ printf_unfiltered ("No exec file.\n");
+ return;
+ }
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> lm.o_path[0])
+ {
+ if (!header_done)
+ {
+ printf_unfiltered("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read",
+ "Shared Object Library");
+ header_done++;
+ }
+ printf_unfiltered ("%-12s",
+ local_hex_string_custom ((unsigned long) LM_ADDR (so),
+ "08l"));
+ printf_unfiltered ("%-12s",
+ local_hex_string_custom ((unsigned long) so -> lmend,
+ "08l"));
+ printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
+ printf_unfiltered ("%s\n", so -> lm.o_path);
+ }
+ }
+ if (so_list_head == NULL)
+ {
+ printf_unfiltered ("No shared libraries loaded at this time.\n");
+ }
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ solib_address -- check to see if an address is in a shared lib
+
+SYNOPSIS
+
+ int solib_address (CORE_ADDR address)
+
+DESCRIPTION
+
+ Provides a hook for other gdb routines to discover whether or
+ not a particular address is within the mapped address space of
+ a shared library. Any address between the base mapping address
+ and the first address beyond the end of the last mapping, is
+ considered to be within the shared library address space, for
+ our purposes.
+
+ For example, this routine is called at one point to disable
+ breakpoints which are in shared libraries that are not currently
+ mapped in.
+ */
+
+int
+solib_address (address)
+ CORE_ADDR address;
+{
+ register struct so_list *so = 0; /* link map state variable */
+
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> lm.o_path[0])
+ {
+ if ((address >= (CORE_ADDR) so->lm.o_base_address) &&
+ (address < (CORE_ADDR) so -> lmend))
+ {
+ return (1);
+ }
+ }
+ }
+ return (0);
+}
+
+/* Called by free_all_symtabs */
+
+void
+clear_solib()
+{
+ struct so_list *next;
+ char *bfd_filename;
+
+ while (so_list_head)
+ {
+ if (so_list_head -> sections)
+ {
+ free ((PTR)so_list_head -> sections);
+ }
+ if (so_list_head -> abfd)
+ {
+ bfd_filename = bfd_get_filename (so_list_head -> abfd);
+ bfd_close (so_list_head -> abfd);
+ }
+ else
+ /* This happens for the executable on SVR4. */
+ bfd_filename = NULL;
+
+ next = so_list_head -> next;
+ if (bfd_filename)
+ free ((PTR)bfd_filename);
+ free ((PTR)so_list_head);
+ so_list_head = next;
+ }
+ debug_base = 0;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ disable_break -- remove the "mapping changed" breakpoint
+
+SYNOPSIS
+
+ static int disable_break ()
+
+DESCRIPTION
+
+ Removes the breakpoint that gets hit when the dynamic linker
+ completes a mapping change.
+
+*/
+
+static int
+disable_break ()
+{
+ int status = 1;
+
+
+ /* Note that breakpoint address and original contents are in our address
+ space, so we just need to write the original contents back. */
+
+ if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0)
+ {
+ status = 0;
+ }
+
+ /* For the SVR4 version, we always know the breakpoint address. For the
+ SunOS version we don't know it until the above code is executed.
+ Grumble if we are stopped anywhere besides the breakpoint address. */
+
+ if (stop_pc != breakpoint_addr)
+ {
+ warning ("stopped at unknown breakpoint while handling shared libraries");
+ }
+
+ return (status);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ enable_break -- arrange for dynamic linker to hit breakpoint
+
+SYNOPSIS
+
+ int enable_break (void)
+
+DESCRIPTION
+
+ Both the SunOS and the SVR4 dynamic linkers have, as part of their
+ debugger interface, support for arranging for the inferior to hit
+ a breakpoint after mapping in the shared libraries. This function
+ enables that breakpoint.
+
+ For SunOS, there is a special flag location (in_debugger) which we
+ set to 1. When the dynamic linker sees this flag set, it will set
+ a breakpoint at a location known only to itself, after saving the
+ original contents of that place and the breakpoint address itself,
+ in it's own internal structures. When we resume the inferior, it
+ will eventually take a SIGTRAP when it runs into the breakpoint.
+ We handle this (in a different place) by restoring the contents of
+ the breakpointed location (which is only known after it stops),
+ chasing around to locate the shared libraries that have been
+ loaded, then resuming.
+
+ For SVR4, the debugger interface structure contains a member (r_brk)
+ which is statically initialized at the time the shared library is
+ built, to the offset of a function (_r_debug_state) which is guaran-
+ teed to be called once before mapping in a library, and again when
+ the mapping is complete. At the time we are examining this member,
+ it contains only the unrelocated offset of the function, so we have
+ to do our own relocation. Later, when the dynamic linker actually
+ runs, it relocates r_brk to be the actual address of _r_debug_state().
+
+ The debugger interface structure also contains an enumeration which
+ is set to either RT_ADD or RT_DELETE prior to changing the mapping,
+ depending upon whether or not the library is being mapped or unmapped,
+ and then set to RT_CONSISTENT after the library is mapped/unmapped.
+
+ Irix 5, on the other hand, has no such features. Instead, we
+ set a breakpoint at main.
+*/
+
+static int
+enable_break ()
+{
+ int success = 0;
+ struct minimal_symbol *msymbol;
+ char **bkpt_namep;
+ CORE_ADDR bkpt_addr;
+
+ /* Scan through the list of symbols, trying to look up the symbol and
+ set a breakpoint there. Terminate loop when we/if we succeed. */
+
+ breakpoint_addr = 0;
+ for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++)
+ {
+ msymbol = lookup_minimal_symbol (*bkpt_namep, symfile_objfile);
+ if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
+ {
+ bkpt_addr = SYMBOL_VALUE_ADDRESS (msymbol);
+#ifdef SOLIB_BKPT_OFFSET
+ /* We only want to skip if bkpt_addr is currently pointing
+ at a GP setting instruction. */
+ {
+ char buf[4];
+
+ if (target_read_memory (bkpt_addr, buf, 4) == 0)
+ {
+ unsigned long insn;
+
+ insn = extract_unsigned_integer (buf, 4);
+ if ((insn & 0xffff0000) == 0x3c1c0000) /* lui $gp,n */
+ bkpt_addr += SOLIB_BKPT_OFFSET;
+ }
+ }
+#endif
+ if (target_insert_breakpoint (bkpt_addr, shadow_contents) == 0)
+ {
+ breakpoint_addr = bkpt_addr;
+ success = 1;
+ break;
+ }
+ }
+ }
+
+ return (success);
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ solib_create_inferior_hook -- shared library startup support
+
+SYNOPSIS
+
+ void solib_create_inferior_hook()
+
+DESCRIPTION
+
+ When gdb starts up the inferior, it nurses it along (through the
+ shell) until it is ready to execute it's first instruction. At this
+ point, this function gets called via expansion of the macro
+ SOLIB_CREATE_INFERIOR_HOOK.
+
+ For SunOS executables, this first instruction is typically the
+ one at "_start", or a similar text label, regardless of whether
+ the executable is statically or dynamically linked. The runtime
+ startup code takes care of dynamically linking in any shared
+ libraries, once gdb allows the inferior to continue.
+
+ For SVR4 executables, this first instruction is either the first
+ instruction in the dynamic linker (for dynamically linked
+ executables) or the instruction at "start" for statically linked
+ executables. For dynamically linked executables, the system
+ first exec's /lib/libc.so.N, which contains the dynamic linker,
+ and starts it running. The dynamic linker maps in any needed
+ shared libraries, maps in the actual user executable, and then
+ jumps to "start" in the user executable.
+
+ For both SunOS shared libraries, and SVR4 shared libraries, we
+ can arrange to cooperate with the dynamic linker to discover the
+ names of shared libraries that are dynamically linked, and the
+ base addresses to which they are linked.
+
+ This function is responsible for discovering those names and
+ addresses, and saving sufficient information about them to allow
+ their symbols to be read at a later time.
+
+FIXME
+
+ Between enable_break() and disable_break(), this code does not
+ properly handle hitting breakpoints which the user might have
+ set in the startup code or in the dynamic linker itself. Proper
+ handling will probably have to wait until the implementation is
+ changed to use the "breakpoint handler function" method.
+
+ Also, what if child has exit()ed? Must exit loop somehow.
+ */
+
+void
+solib_create_inferior_hook()
+{
+ if (!enable_break ())
+ {
+ warning ("shared library handler failed to enable breakpoint");
+ return;
+ }
+
+ /* Now run the target. It will eventually hit the breakpoint, at
+ which point all of the libraries will have been mapped in and we
+ can go groveling around in the dynamic linker structures to find
+ out what we need to know about them. */
+
+ clear_proceed_status ();
+ stop_soon_quietly = 1;
+ stop_signal = 0;
+ do
+ {
+ target_resume (-1, 0, stop_signal);
+ wait_for_inferior ();
+ }
+ while (stop_signal != SIGTRAP);
+ stop_soon_quietly = 0;
+
+ /* We are now either at the "mapping complete" breakpoint (or somewhere
+ else, a condition we aren't prepared to deal with anyway), so adjust
+ the PC as necessary after a breakpoint, disable the breakpoint, and
+ add any shared libraries that were mapped in. */
+
+ if (DECR_PC_AFTER_BREAK)
+ {
+ stop_pc -= DECR_PC_AFTER_BREAK;
+ write_register (PC_REGNUM, stop_pc);
+ }
+
+ if (!disable_break ())
+ {
+ warning ("shared library handler failed to disable breakpoint");
+ }
+
+ solib_add ((char *) 0, 0, (struct target_ops *) 0);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ sharedlibrary_command -- handle command to explicitly add library
+
+SYNOPSIS
+
+ static void sharedlibrary_command (char *args, int from_tty)
+
+DESCRIPTION
+
+*/
+
+static void
+sharedlibrary_command (args, from_tty)
+char *args;
+int from_tty;
+{
+ dont_repeat ();
+ solib_add (args, from_tty, (struct target_ops *) 0);
+}
+
+void
+_initialize_solib()
+{
+
+ add_com ("sharedlibrary", class_files, sharedlibrary_command,
+ "Load shared object library symbols for files matching REGEXP.");
+ add_info ("sharedlibrary", info_sharedlibrary_command,
+ "Status of loaded shared object libraries.");
+}
--- /dev/null
+/* Read a symbol table in ECOFF format (Third-Eye).
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993 Free Software
+ Foundation, Inc.
+ Original version contributed by Alessandro Forin (af@cs.cmu.edu) at
+ CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor
+ at Cygnus Support.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* This module provides the function mdebug_build_psymtabs. It reads
+ ECOFF debugging information into partial symbol tables. The
+ debugging information is read from two structures. A struct
+ ecoff_debug_swap includes the sizes of each ECOFF structure and
+ swapping routines; these are fixed for a particular target. A
+ struct ecoff_debug_info points to the debugging information for a
+ particular object file.
+
+ ECOFF symbol tables are mostly written in the byte order of the
+ target machine. However, one section of the table (the auxiliary
+ symbol information) is written in the host byte order. There is a
+ bit in the other symbol info which describes which host byte order
+ was used. ECOFF thereby takes the trophy from Intel `b.out' for
+ the most brain-dead adaptation of a file format to byte order.
+
+ This module can read all four of the known byte-order combinations,
+ on any type of host. */
+
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "gdbcore.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "obstack.h"
+#include "buildsym.h"
+#include "stabsread.h"
+#include "complaints.h"
+
+#if !defined (SEEK_SET)
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#endif
+
+/* These are needed if the tm.h file does not contain the necessary
+ mips specific definitions. */
+
+#ifndef MIPS_EFI_SYMBOL_NAME
+#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
+#include "coff/sym.h"
+#include "coff/symconst.h"
+typedef struct mips_extra_func_info {
+ long numargs;
+ PDR pdr;
+} *mips_extra_func_info_t;
+#ifndef RA_REGNUM
+#define RA_REGNUM 0
+#endif
+#endif
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#include "gdb-stabs.h"
+
+#include "bfd.h"
+
+#include "coff/ecoff.h" /* COFF-like aspects of ecoff files */
+
+#include "libaout.h" /* Private BFD a.out information. */
+#include "aout/aout64.h"
+#include "aout/stab_gnu.h" /* STABS information */
+
+#include "expression.h"
+#include "language.h" /* Needed inside partial-stab.h */
+
+/* Provide a default mapping from a ecoff register number to a gdb REGNUM. */
+#ifndef ECOFF_REG_TO_REGNUM
+#define ECOFF_REG_TO_REGNUM(num) (num)
+#endif
+
+/* Each partial symbol table entry contains a pointer to private data
+ for the read_symtab() function to use when expanding a partial
+ symbol table entry to a full symbol table entry.
+
+ For mdebugread this structure contains the index of the FDR that this
+ psymtab represents and a pointer to the BFD that the psymtab was
+ created from. */
+
+#define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private)
+#define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx)
+#define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd)
+#define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap)
+#define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info)
+#define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list)
+
+struct symloc
+{
+ int fdr_idx;
+ bfd *cur_bfd;
+ const struct ecoff_debug_swap *debug_swap;
+ struct ecoff_debug_info *debug_info;
+ struct mdebug_pending **pending_list;
+ EXTR *extern_tab; /* Pointer to external symbols for this file. */
+ int extern_count; /* Size of extern_tab. */
+ enum language pst_language;
+};
+
+/* Things we import explicitly from other modules */
+
+extern int info_verbose;
+
+/* Various complaints about symbol reading that don't abort the process */
+
+static struct complaint bad_file_number_complaint =
+{"bad file number %d", 0, 0};
+
+static struct complaint index_complaint =
+{"bad aux index at symbol %s", 0, 0};
+
+static struct complaint aux_index_complaint =
+{"bad proc end in aux found from symbol %s", 0, 0};
+
+static struct complaint block_index_complaint =
+{"bad aux index at block symbol %s", 0, 0};
+
+static struct complaint unknown_ext_complaint =
+{"unknown external symbol %s", 0, 0};
+
+static struct complaint unknown_sym_complaint =
+{"unknown local symbol %s", 0, 0};
+
+static struct complaint unknown_st_complaint =
+{"with type %d", 0, 0};
+
+static struct complaint block_overflow_complaint =
+{"block containing %s overfilled", 0, 0};
+
+static struct complaint basic_type_complaint =
+{"cannot map ECOFF basic type 0x%x for %s", 0, 0};
+
+static struct complaint unknown_type_qual_complaint =
+{"unknown type qualifier 0x%x", 0, 0};
+
+static struct complaint array_index_type_complaint =
+{"illegal array index type for %s, assuming int", 0, 0};
+
+static struct complaint bad_tag_guess_complaint =
+{"guessed tag type of %s incorrectly", 0, 0};
+
+static struct complaint block_member_complaint =
+{"declaration block contains unhandled symbol type %d", 0, 0};
+
+static struct complaint stEnd_complaint =
+{"stEnd with storage class %d not handled", 0, 0};
+
+static struct complaint unknown_mdebug_symtype_complaint =
+{"unknown symbol type 0x%x", 0, 0};
+
+static struct complaint stab_unknown_complaint =
+{"unknown stabs symbol %s", 0, 0};
+
+static struct complaint pdr_for_nonsymbol_complaint =
+{"PDR for %s, but no symbol", 0, 0};
+
+static struct complaint pdr_static_symbol_complaint =
+{"can't handle PDR for static proc at 0x%lx", 0, 0};
+
+static struct complaint bad_setjmp_pdr_complaint =
+{"fixing bad setjmp PDR from libc", 0, 0};
+
+static struct complaint bad_fbitfield_complaint =
+{"can't handle TIR fBitfield for %s", 0, 0};
+
+static struct complaint bad_continued_complaint =
+{"illegal TIR continued for %s", 0, 0};
+
+static struct complaint bad_rfd_entry_complaint =
+{"bad rfd entry for %s: file %d, index %d", 0, 0};
+
+static struct complaint unexpected_type_code_complaint =
+{"unexpected type code for %s", 0, 0};
+
+static struct complaint unable_to_cross_ref_complaint =
+{"unable to cross ref btTypedef for %s", 0, 0};
+
+static struct complaint illegal_forward_tq0_complaint =
+{"illegal tq0 in forward typedef for %s", 0, 0};
+
+static struct complaint illegal_forward_bt_complaint =
+{"illegal bt %d in forward typedef for %s", 0, 0};
+
+static struct complaint bad_linetable_guess_complaint =
+{"guessed size of linetable for %s incorrectly", 0, 0};
+
+static struct complaint bad_ext_ifd_complaint =
+{"bad ifd for external symbol: %d (max %d)", 0, 0};
+
+static struct complaint bad_ext_iss_complaint =
+{"bad iss for external symbol: %ld (max %ld)", 0, 0};
+
+/* Macros and extra defs */
+
+/* Puns: hard to find whether -g was used and how */
+
+#define MIN_GLEVEL GLEVEL_0
+#define compare_glevel(a,b) \
+ (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \
+ ((b) == GLEVEL_3) ? -1 : (int)((b) - (a)))
+\f
+/* Things that really are local to this module */
+
+/* Remember what we deduced to be the source language of this psymtab. */
+
+static enum language psymtab_language = language_unknown;
+
+/* Current BFD. */
+
+static bfd *cur_bfd;
+
+/* How to parse debugging information for CUR_BFD. */
+
+static const struct ecoff_debug_swap *debug_swap;
+
+/* Pointers to debugging information for CUR_BFD. */
+
+static struct ecoff_debug_info *debug_info;
+
+/* Pointer to current file decriptor record, and its index */
+
+static FDR *cur_fdr;
+static int cur_fd;
+
+/* Index of current symbol */
+
+static int cur_sdx;
+
+/* Note how much "debuggable" this image is. We would like
+ to see at least one FDR with full symbols */
+
+static max_gdbinfo;
+static max_glevel;
+
+/* When examining .o files, report on undefined symbols */
+
+static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs;
+
+/* Pseudo symbol to use when putting stabs into the symbol table. */
+
+static char stabs_symbol[] = STABS_SYMBOL;
+
+/* Extra builtin types */
+
+struct type *builtin_type_complex;
+struct type *builtin_type_double_complex;
+struct type *builtin_type_fixed_dec;
+struct type *builtin_type_float_dec;
+struct type *builtin_type_string;
+
+/* Forward declarations */
+
+static int
+upgrade_type PARAMS ((int, struct type **, int, union aux_ext *, int, char *));
+
+static void
+parse_partial_symbols PARAMS ((struct objfile *,
+ struct section_offsets *));
+
+static FDR
+*get_rfd PARAMS ((int, int));
+
+static int
+cross_ref PARAMS ((int, union aux_ext *, struct type **, enum type_code,
+ char **, int, char *));
+
+static struct symbol *
+new_symbol PARAMS ((char *));
+
+static struct type *
+new_type PARAMS ((char *));
+
+static struct block *
+new_block PARAMS ((int));
+
+static struct symtab *
+new_symtab PARAMS ((char *, int, int, struct objfile *));
+
+static struct linetable *
+new_linetable PARAMS ((int));
+
+static struct blockvector *
+new_bvect PARAMS ((int));
+
+static int
+parse_symbol PARAMS ((SYMR *, union aux_ext *, char *, int));
+
+static struct type *
+parse_type PARAMS ((int, union aux_ext *, unsigned int, int *, int, char *));
+
+static struct symbol *
+mylookup_symbol PARAMS ((char *, struct block *, enum namespace,
+ enum address_class));
+
+static struct block *
+shrink_block PARAMS ((struct block *, struct symtab *));
+
+static PTR
+xzalloc PARAMS ((unsigned int));
+
+static void
+sort_blocks PARAMS ((struct symtab *));
+
+static int
+compare_blocks PARAMS ((const void *, const void *));
+
+static struct partial_symtab *
+new_psymtab PARAMS ((char *, struct objfile *));
+
+static void
+psymtab_to_symtab_1 PARAMS ((struct partial_symtab *, char *));
+
+static void
+add_block PARAMS ((struct block *, struct symtab *));
+
+static void
+add_symbol PARAMS ((struct symbol *, struct block *));
+
+static int
+add_line PARAMS ((struct linetable *, int, CORE_ADDR, int));
+
+static struct linetable *
+shrink_linetable PARAMS ((struct linetable *));
+
+static char *
+mdebug_next_symbol_text PARAMS ((void));
+\f
+/* Address bounds for the signal trampoline in inferior, if any */
+
+CORE_ADDR sigtramp_address, sigtramp_end;
+
+/* Allocate zeroed memory */
+
+static PTR
+xzalloc (size)
+ unsigned int size;
+{
+ PTR p = xmalloc (size);
+
+ memset (p, 0, size);
+ return p;
+}
+
+/* Exported procedure: Builds a symtab from the PST partial one.
+ Restores the environment in effect when PST was created, delegates
+ most of the work to an ancillary procedure, and sorts
+ and reorders the symtab list at the end */
+
+static void
+mdebug_psymtab_to_symtab (pst)
+ struct partial_symtab *pst;
+{
+
+ if (!pst)
+ return;
+
+ if (info_verbose)
+ {
+ printf_filtered ("Reading in symbols for %s...", pst->filename);
+ gdb_flush (gdb_stdout);
+ }
+
+ next_symbol_text_func = mdebug_next_symbol_text;
+
+ psymtab_to_symtab_1 (pst, pst->filename);
+
+ /* Match with global symbols. This only needs to be done once,
+ after all of the symtabs and dependencies have been read in. */
+ scan_file_globals (pst->objfile);
+
+ if (info_verbose)
+ printf_filtered ("done.\n");
+}
+\f
+/* File-level interface functions */
+
+/* Find a file descriptor given its index RF relative to a file CF */
+
+static FDR *
+get_rfd (cf, rf)
+ int cf, rf;
+{
+ FDR *fdrs;
+ register FDR *f;
+ RFDT rfd;
+
+ fdrs = debug_info->fdr;
+ f = fdrs + cf;
+ /* Object files do not have the RFD table, all refs are absolute */
+ if (f->rfdBase == 0)
+ return fdrs + rf;
+ (*debug_swap->swap_rfd_in) (cur_bfd,
+ ((char *) debug_info->external_rfd
+ + ((f->rfdBase + rf)
+ * debug_swap->external_rfd_size)),
+ &rfd);
+ return fdrs + rfd;
+}
+
+/* Return a safer print NAME for a file descriptor */
+
+static char *
+fdr_name (f)
+ FDR *f;
+{
+ if (f->rss == -1)
+ return "<stripped file>";
+ if (f->rss == 0)
+ return "<NFY>";
+ return debug_info->ss + f->issBase + f->rss;
+}
+
+
+/* Read in and parse the symtab of the file OBJFILE. Symbols from
+ different sections are relocated via the SECTION_OFFSETS. */
+
+void
+mdebug_build_psymtabs (objfile, swap, info, section_offsets)
+ struct objfile *objfile;
+ const struct ecoff_debug_swap *swap;
+ struct ecoff_debug_info *info;
+ struct section_offsets *section_offsets;
+{
+ cur_bfd = objfile->obfd;
+ debug_swap = swap;
+ debug_info = info;
+
+ /* Make sure all the FDR information is swapped in. */
+ if (info->fdr == (FDR *) NULL)
+ {
+ char *fdr_src;
+ char *fdr_end;
+ FDR *fdr_ptr;
+
+ info->fdr = (FDR *) obstack_alloc (&objfile->psymbol_obstack,
+ (info->symbolic_header.ifdMax
+ * sizeof (FDR)));
+ fdr_src = info->external_fdr;
+ fdr_end = (fdr_src
+ + info->symbolic_header.ifdMax * swap->external_fdr_size);
+ fdr_ptr = info->fdr;
+ for (; fdr_src < fdr_end; fdr_src += swap->external_fdr_size, fdr_ptr++)
+ (*swap->swap_fdr_in) (objfile->obfd, fdr_src, fdr_ptr);
+ }
+
+ parse_partial_symbols (objfile, section_offsets);
+
+#if 0
+ /* Check to make sure file was compiled with -g. If not, warn the
+ user of this limitation. */
+ if (compare_glevel (max_glevel, GLEVEL_2) < 0)
+ {
+ if (max_gdbinfo == 0)
+ printf_unfiltered ("\n%s not compiled with -g, debugging support is limited.\n",
+ objfile->name);
+ printf_unfiltered ("You should compile with -g2 or -g3 for best debugging support.\n");
+ gdb_flush (gdb_stdout);
+ }
+#endif
+}
+\f
+/* Local utilities */
+
+/* Map of FDR indexes to partial symtabs */
+
+struct pst_map
+{
+ struct partial_symtab *pst; /* the psymtab proper */
+ long n_globals; /* exported globals (external symbols) */
+ long globals_offset; /* cumulative */
+};
+
+
+/* Utility stack, used to nest procedures and blocks properly.
+ It is a doubly linked list, to avoid too many alloc/free.
+ Since we might need it quite a few times it is NOT deallocated
+ after use. */
+
+static struct parse_stack
+{
+ struct parse_stack *next, *prev;
+ struct symtab *cur_st; /* Current symtab. */
+ struct block *cur_block; /* Block in it. */
+
+ /* What are we parsing. stFile, or stBlock are for files and
+ blocks. stProc or stStaticProc means we have seen the start of a
+ procedure, but not the start of the block within in. When we see
+ the start of that block, we change it to stNil, without pushing a
+ new block, i.e. stNil means both a procedure and a block. */
+
+ int blocktype;
+
+ int maxsyms; /* Max symbols in this block. */
+ struct type *cur_type; /* Type we parse fields for. */
+ int cur_field; /* Field number in cur_type. */
+ CORE_ADDR procadr; /* Start addres of this procedure */
+ int numargs; /* Its argument count */
+}
+
+ *top_stack; /* Top stack ptr */
+
+
+/* Enter a new lexical context */
+
+static void
+push_parse_stack ()
+{
+ struct parse_stack *new;
+
+ /* Reuse frames if possible */
+ if (top_stack && top_stack->prev)
+ new = top_stack->prev;
+ else
+ new = (struct parse_stack *) xzalloc (sizeof (struct parse_stack));
+ /* Initialize new frame with previous content */
+ if (top_stack)
+ {
+ register struct parse_stack *prev = new->prev;
+
+ *new = *top_stack;
+ top_stack->prev = new;
+ new->prev = prev;
+ new->next = top_stack;
+ }
+ top_stack = new;
+}
+
+/* Exit a lexical context */
+
+static void
+pop_parse_stack ()
+{
+ if (!top_stack)
+ return;
+ if (top_stack->next)
+ top_stack = top_stack->next;
+}
+
+
+/* Cross-references might be to things we haven't looked at
+ yet, e.g. type references. To avoid too many type
+ duplications we keep a quick fixup table, an array
+ of lists of references indexed by file descriptor */
+
+struct mdebug_pending
+{
+ struct mdebug_pending *next; /* link */
+ char *s; /* the unswapped symbol */
+ struct type *t; /* its partial type descriptor */
+};
+
+
+/* The pending information is kept for an entire object file, and used
+ to be in the sym_private field. I took it out when I split
+ mdebugread from mipsread, because this might not be the only type
+ of symbols read from an object file. Instead, we allocate the
+ pending information table when we create the partial symbols, and
+ we store a pointer to the single table in each psymtab. */
+
+static struct mdebug_pending **pending_list;
+
+/* Check whether we already saw symbol SH in file FH */
+
+static struct mdebug_pending *
+is_pending_symbol (fh, sh)
+ FDR *fh;
+ char *sh;
+{
+ int f_idx = fh - debug_info->fdr;
+ register struct mdebug_pending *p;
+
+ /* Linear search is ok, list is typically no more than 10 deep */
+ for (p = pending_list[f_idx]; p; p = p->next)
+ if (p->s == sh)
+ break;
+ return p;
+}
+
+/* Add a new symbol SH of type T */
+
+static void
+add_pending (fh, sh, t)
+ FDR *fh;
+ char *sh;
+ struct type *t;
+{
+ int f_idx = fh - debug_info->fdr;
+ struct mdebug_pending *p = is_pending_symbol (fh, sh);
+
+ /* Make sure we do not make duplicates */
+ if (!p)
+ {
+ p = ((struct mdebug_pending *)
+ obstack_alloc (¤t_objfile->psymbol_obstack,
+ sizeof (struct mdebug_pending)));
+ p->s = sh;
+ p->t = t;
+ p->next = pending_list[f_idx];
+ pending_list[f_idx] = p;
+ }
+}
+\f
+
+/* Parsing Routines proper. */
+
+/* Parse a single symbol. Mostly just make up a GDB symbol for it.
+ For blocks, procedures and types we open a new lexical context.
+ This is basically just a big switch on the symbol's type. Argument
+ AX is the base pointer of aux symbols for this file (fh->iauxBase).
+ EXT_SH points to the unswapped symbol, which is needed for struct,
+ union, etc., types; it is NULL for an EXTR. BIGEND says whether
+ aux symbols are big-endian or little-endian. Return count of
+ SYMR's handled (normally one). */
+
+static int
+parse_symbol (sh, ax, ext_sh, bigend)
+ SYMR *sh;
+ union aux_ext *ax;
+ char *ext_sh;
+ int bigend;
+{
+ const bfd_size_type external_sym_size = debug_swap->external_sym_size;
+ void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)) =
+ debug_swap->swap_sym_in;
+ char *name;
+ struct symbol *s;
+ struct block *b;
+ struct mdebug_pending *pend;
+ struct type *t;
+ struct field *f;
+ int count = 1;
+ enum address_class class;
+ TIR tir;
+ long svalue = sh->value;
+ int bitsize;
+
+ if (ext_sh == (char *) NULL)
+ name = debug_info->ssext + sh->iss;
+ else
+ name = debug_info->ss + cur_fdr->issBase + sh->iss;
+
+ switch (sh->st)
+ {
+ case stNil:
+ break;
+
+ case stGlobal: /* external symbol, goes into global block */
+ class = LOC_STATIC;
+ b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
+ GLOBAL_BLOCK);
+ s = new_symbol (name);
+ SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
+ goto data;
+
+ case stStatic: /* static data, goes into current block. */
+ class = LOC_STATIC;
+ b = top_stack->cur_block;
+ s = new_symbol (name);
+ if (sh->sc == scCommon)
+ {
+ /* It is a FORTRAN common block. At least for SGI Fortran the
+ address is not in the symbol; we need to fix it later in
+ scan_file_globals. */
+ int bucket = hashname (SYMBOL_NAME (s));
+ SYMBOL_VALUE_CHAIN (s) = global_sym_chain[bucket];
+ global_sym_chain[bucket] = s;
+ }
+ else
+ SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
+ goto data;
+
+ case stLocal: /* local variable, goes into current block */
+ if (sh->sc == scRegister)
+ {
+ class = LOC_REGISTER;
+ svalue = ECOFF_REG_TO_REGNUM (svalue);
+ }
+ else
+ class = LOC_LOCAL;
+ b = top_stack->cur_block;
+ s = new_symbol (name);
+ SYMBOL_VALUE (s) = svalue;
+
+ data: /* Common code for symbols describing data */
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ SYMBOL_CLASS (s) = class;
+ add_symbol (s, b);
+
+ /* Type could be missing in a number of cases */
+ if (sh->sc == scUndefined || sh->sc == scNil ||
+ sh->index == 0xfffff)
+ SYMBOL_TYPE (s) = builtin_type_int; /* undefined? */
+ else
+ SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
+ /* Value of a data symbol is its memory address */
+ break;
+
+ case stParam: /* arg to procedure, goes into current block */
+ max_gdbinfo++;
+ top_stack->numargs++;
+
+ /* Special GNU C++ name. */
+ if (name[0] == CPLUS_MARKER && name[1] == 't' && name[2] == 0)
+ name = "this"; /* FIXME, not alloc'd in obstack */
+ s = new_symbol (name);
+
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ switch (sh->sc)
+ {
+ case scRegister:
+ /* Pass by value in register. */
+ SYMBOL_CLASS(s) = LOC_REGPARM;
+ svalue = ECOFF_REG_TO_REGNUM (svalue);
+ break;
+ case scVar:
+ /* Pass by reference on stack. */
+ SYMBOL_CLASS(s) = LOC_REF_ARG;
+ break;
+ case scVarRegister:
+ /* Pass by reference in register. */
+ SYMBOL_CLASS(s) = LOC_REGPARM_ADDR;
+ svalue = ECOFF_REG_TO_REGNUM (svalue);
+ break;
+ default:
+ /* Pass by value on stack. */
+ SYMBOL_CLASS(s) = LOC_ARG;
+ break;
+ }
+ SYMBOL_VALUE (s) = svalue;
+ SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
+ add_symbol (s, top_stack->cur_block);
+#if 0
+ /* FIXME: This has not been tested. See dbxread.c */
+ /* Add the type of this parameter to the function/procedure
+ type of this block. */
+ add_param_to_type (&top_stack->cur_block->function->type, s);
+#endif
+ break;
+
+ case stLabel: /* label, goes into current block */
+ s = new_symbol (name);
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; /* so that it can be used */
+ SYMBOL_CLASS (s) = LOC_LABEL; /* but not misused */
+ SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value;
+ SYMBOL_TYPE (s) = builtin_type_int;
+ add_symbol (s, top_stack->cur_block);
+ break;
+
+ case stProc: /* Procedure, usually goes into global block */
+ case stStaticProc: /* Static procedure, goes into current block */
+ s = new_symbol (name);
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_BLOCK;
+ /* Type of the return value */
+ if (sh->sc == scUndefined || sh->sc == scNil)
+ t = builtin_type_int;
+ else
+ t = parse_type (cur_fd, ax, sh->index + 1, 0, bigend, name);
+ b = top_stack->cur_block;
+ if (sh->st == stProc)
+ {
+ struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
+ /* The next test should normally be true, but provides a
+ hook for nested functions (which we don't want to make
+ global). */
+ if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
+ b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
+ /* Irix 5 sometimes has duplicate names for the same
+ function. We want to add such names up at the global
+ level, not as a nested function. */
+ else if (sh->value == top_stack->procadr)
+ b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
+ }
+ add_symbol (s, b);
+
+ /* Make a type for the procedure itself */
+#if 0
+ /* FIXME: This has not been tested yet! See dbxread.c */
+ /* Generate a template for the type of this function. The
+ types of the arguments will be added as we read the symbol
+ table. */
+ memcpy (lookup_function_type (t), SYMBOL_TYPE (s), sizeof (struct type));
+#else
+ SYMBOL_TYPE (s) = lookup_function_type (t);
+#endif
+
+ /* Create and enter a new lexical context */
+ b = new_block (top_stack->maxsyms);
+ SYMBOL_BLOCK_VALUE (s) = b;
+ BLOCK_FUNCTION (b) = s;
+ BLOCK_START (b) = BLOCK_END (b) = sh->value;
+ BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
+ add_block (b, top_stack->cur_st);
+
+ /* Not if we only have partial info */
+ if (sh->sc == scUndefined || sh->sc == scNil)
+ break;
+
+ push_parse_stack ();
+ top_stack->cur_block = b;
+ top_stack->blocktype = sh->st;
+ top_stack->cur_type = SYMBOL_TYPE (s);
+ top_stack->cur_field = -1;
+ top_stack->procadr = sh->value;
+ top_stack->numargs = 0;
+ break;
+
+ /* Beginning of code for structure, union, and enum definitions.
+ They all share a common set of local variables, defined here. */
+ {
+ enum type_code type_code;
+ char *ext_tsym;
+ int nfields;
+ long max_value;
+ struct field *f;
+
+ case stStruct: /* Start a block defining a struct type */
+ type_code = TYPE_CODE_STRUCT;
+ goto structured_common;
+
+ case stUnion: /* Start a block defining a union type */
+ type_code = TYPE_CODE_UNION;
+ goto structured_common;
+
+ case stEnum: /* Start a block defining an enum type */
+ type_code = TYPE_CODE_ENUM;
+ goto structured_common;
+
+ case stBlock: /* Either a lexical block, or some type */
+ if (sh->sc != scInfo && sh->sc != scCommon)
+ goto case_stBlock_code; /* Lexical block */
+
+ type_code = TYPE_CODE_UNDEF; /* We have a type. */
+
+ /* Common code for handling struct, union, enum, and/or as-yet-
+ unknown-type blocks of info about structured data. `type_code'
+ has been set to the proper TYPE_CODE, if we know it. */
+ structured_common:
+ push_parse_stack ();
+ top_stack->blocktype = stBlock;
+
+ /* First count the number of fields and the highest value. */
+ nfields = 0;
+ max_value = 0;
+ for (ext_tsym = ext_sh + external_sym_size;
+ ;
+ ext_tsym += external_sym_size)
+ {
+ SYMR tsym;
+
+ (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
+
+ switch (tsym.st)
+ {
+ case stEnd:
+ goto end_of_fields;
+
+ case stMember:
+ if (nfields == 0 && type_code == TYPE_CODE_UNDEF)
+ /* If the type of the member is Nil (or Void),
+ without qualifiers, assume the tag is an
+ enumeration. */
+ if (tsym.index == indexNil)
+ type_code = TYPE_CODE_ENUM;
+ else
+ {
+ ecoff_swap_tir_in (bigend,
+ &ax[tsym.index].a_ti,
+ &tir);
+ if ((tir.bt == btNil || tir.bt == btVoid)
+ && tir.tq0 == tqNil)
+ type_code = TYPE_CODE_ENUM;
+ }
+ nfields++;
+ if (tsym.value > max_value)
+ max_value = tsym.value;
+ break;
+
+ case stBlock:
+ case stUnion:
+ case stEnum:
+ case stStruct:
+ {
+#if 0
+ /* This is a no-op; is it trying to tell us something
+ we should be checking? */
+ if (tsym.sc == scVariant); /*UNIMPLEMENTED*/
+#endif
+ if (tsym.index != 0)
+ {
+ /* This is something like a struct within a
+ struct. Skip over the fields of the inner
+ struct. The -1 is because the for loop will
+ increment ext_tsym. */
+ ext_tsym = ((char *) debug_info->external_sym
+ + ((cur_fdr->isymBase + tsym.index - 1)
+ * external_sym_size));
+ }
+ }
+ break;
+
+ case stTypedef:
+ /* mips cc puts out a typedef for struct x if it is not yet
+ defined when it encounters
+ struct y { struct x *xp; };
+ Just ignore it. */
+ break;
+
+ default:
+ complain (&block_member_complaint, tsym.st);
+ }
+ }
+ end_of_fields:;
+
+ /* In an stBlock, there is no way to distinguish structs,
+ unions, and enums at this point. This is a bug in the
+ original design (that has been fixed with the recent
+ addition of the stStruct, stUnion, and stEnum symbol
+ types.) The way you can tell is if/when you see a variable
+ or field of that type. In that case the variable's type
+ (in the AUX table) says if the type is struct, union, or
+ enum, and points back to the stBlock here. So you can
+ patch the tag kind up later - but only if there actually is
+ a variable or field of that type.
+
+ So until we know for sure, we will guess at this point.
+ The heuristic is:
+ If the first member has index==indexNil or a void type,
+ assume we have an enumeration.
+ Otherwise, if there is more than one member, and all
+ the members have offset 0, assume we have a union.
+ Otherwise, assume we have a struct.
+
+ The heuristic could guess wrong in the case of of an
+ enumeration with no members or a union with one (or zero)
+ members, or when all except the last field of a struct have
+ width zero. These are uncommon and/or illegal situations,
+ and in any case guessing wrong probably doesn't matter
+ much.
+
+ But if we later do find out we were wrong, we fixup the tag
+ kind. Members of an enumeration must be handled
+ differently from struct/union fields, and that is harder to
+ patch up, but luckily we shouldn't need to. (If there are
+ any enumeration members, we can tell for sure it's an enum
+ here.) */
+
+ if (type_code == TYPE_CODE_UNDEF)
+ if (nfields > 1 && max_value == 0)
+ type_code = TYPE_CODE_UNION;
+ else
+ type_code = TYPE_CODE_STRUCT;
+
+ /* Create a new type or use the pending type. */
+ pend = is_pending_symbol (cur_fdr, ext_sh);
+ if (pend == (struct mdebug_pending *) NULL)
+ {
+ t = new_type (NULL);
+ add_pending (cur_fdr, ext_sh, t);
+ }
+ else
+ t = pend->t;
+
+ /* Alpha cc unnamed structs do not get a tag name. */
+ if (sh->iss == 0)
+ TYPE_TAG_NAME (t) = NULL;
+ else
+ TYPE_TAG_NAME (t) = obconcat (¤t_objfile->symbol_obstack,
+ "", "", name);
+
+ TYPE_CODE (t) = type_code;
+ TYPE_LENGTH (t) = sh->value;
+ TYPE_NFIELDS (t) = nfields;
+ TYPE_FIELDS (t) = f = ((struct field *)
+ TYPE_ALLOC (t,
+ nfields * sizeof (struct field)));
+
+ if (type_code == TYPE_CODE_ENUM)
+ {
+ /* This is a non-empty enum. */
+ for (ext_tsym = ext_sh + external_sym_size;
+ ;
+ ext_tsym += external_sym_size)
+ {
+ SYMR tsym;
+ struct symbol *enum_sym;
+
+ (*swap_sym_in) (cur_bfd, ext_tsym, &tsym);
+
+ if (tsym.st != stMember)
+ break;
+
+ f->bitpos = tsym.value;
+ f->type = t;
+ f->name = debug_info->ss + cur_fdr->issBase + tsym.iss;
+ f->bitsize = 0;
+
+ enum_sym = ((struct symbol *)
+ obstack_alloc (¤t_objfile->symbol_obstack,
+ sizeof (struct symbol)));
+ memset ((PTR) enum_sym, 0, sizeof (struct symbol));
+ SYMBOL_NAME (enum_sym) = f->name;
+ SYMBOL_CLASS (enum_sym) = LOC_CONST;
+ SYMBOL_TYPE (enum_sym) = t;
+ SYMBOL_NAMESPACE (enum_sym) = VAR_NAMESPACE;
+ SYMBOL_VALUE (enum_sym) = tsym.value;
+ add_symbol (enum_sym, top_stack->cur_block);
+
+ /* Skip the stMembers that we've handled. */
+ count++;
+ f++;
+ }
+ }
+ /* make this the current type */
+ top_stack->cur_type = t;
+ top_stack->cur_field = 0;
+
+ /* Do not create a symbol for alpha cc unnamed structs. */
+ if (sh->iss == 0)
+ break;
+
+ /* gcc puts out an empty struct for an opaque struct definitions,
+ do not create a symbol for it either. */
+ if (TYPE_NFIELDS (t) == 0)
+ {
+ TYPE_FLAGS (t) |= TYPE_FLAG_STUB;
+ break;
+ }
+
+ s = new_symbol (name);
+ SYMBOL_NAMESPACE (s) = STRUCT_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_TYPEDEF;
+ SYMBOL_VALUE (s) = 0;
+ SYMBOL_TYPE (s) = t;
+ add_symbol (s, top_stack->cur_block);
+ break;
+
+ /* End of local variables shared by struct, union, enum, and
+ block (as yet unknown struct/union/enum) processing. */
+ }
+
+ case_stBlock_code:
+ /* beginnning of (code) block. Value of symbol
+ is the displacement from procedure start */
+ push_parse_stack ();
+
+ /* Do not start a new block if this is the outermost block of a
+ procedure. This allows the LOC_BLOCK symbol to point to the
+ block with the local variables, so funcname::var works. */
+ if (top_stack->blocktype == stProc
+ || top_stack->blocktype == stStaticProc)
+ {
+ top_stack->blocktype = stNil;
+ break;
+ }
+
+ top_stack->blocktype = stBlock;
+ b = new_block (top_stack->maxsyms);
+ BLOCK_START (b) = sh->value + top_stack->procadr;
+ BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
+ top_stack->cur_block = b;
+ add_block (b, top_stack->cur_st);
+ break;
+
+ case stEnd: /* end (of anything) */
+ if (sh->sc == scInfo || sh->sc == scCommon)
+ {
+ /* Finished with type */
+ top_stack->cur_type = 0;
+ }
+ else if (sh->sc == scText &&
+ (top_stack->blocktype == stProc ||
+ top_stack->blocktype == stStaticProc))
+ {
+ /* Finished with procedure */
+ struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st);
+ struct mips_extra_func_info *e;
+ struct block *b;
+ int i;
+
+ BLOCK_END (top_stack->cur_block) += sh->value; /* size */
+
+ /* Make up special symbol to contain procedure specific info */
+ s = new_symbol (MIPS_EFI_SYMBOL_NAME);
+ SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_CONST;
+ SYMBOL_TYPE (s) = builtin_type_void;
+ e = ((struct mips_extra_func_info *)
+ obstack_alloc (¤t_objfile->symbol_obstack,
+ sizeof (struct mips_extra_func_info)));
+ SYMBOL_VALUE (s) = (long) e;
+ e->numargs = top_stack->numargs;
+ add_symbol (s, top_stack->cur_block);
+
+ /* Reallocate symbols, saving memory */
+ b = shrink_block (top_stack->cur_block, top_stack->cur_st);
+
+ /* f77 emits proc-level with address bounds==[0,0],
+ So look for such child blocks, and patch them. */
+ for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
+ {
+ struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i);
+ if (BLOCK_SUPERBLOCK (b_bad) == b
+ && BLOCK_START (b_bad) == top_stack->procadr
+ && BLOCK_END (b_bad) == top_stack->procadr)
+ {
+ BLOCK_START (b_bad) = BLOCK_START (b);
+ BLOCK_END (b_bad) = BLOCK_END (b);
+ }
+ }
+ }
+ else if (sh->sc == scText && top_stack->blocktype == stBlock)
+ {
+ /* End of (code) block. The value of the symbol is the
+ displacement from the procedure`s start address of the
+ end of this block. */
+ BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr;
+ shrink_block (top_stack->cur_block, top_stack->cur_st);
+ }
+ else if (sh->sc == scText && top_stack->blocktype == stNil)
+ {
+ /* End of outermost block. Pop parse stack and ignore. The
+ following stEnd of stProc will take care of the block. */
+ ;
+ }
+ else if (sh->sc == scText && top_stack->blocktype == stFile)
+ {
+ /* End of file. Pop parse stack and ignore. Higher
+ level code deals with this. */
+ ;
+ }
+ else
+ complain (&stEnd_complaint, sh->sc);
+
+ pop_parse_stack (); /* restore previous lexical context */
+ break;
+
+ case stMember: /* member of struct or union */
+ f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++];
+ f->name = name;
+ f->bitpos = sh->value;
+ bitsize = 0;
+ f->type = parse_type (cur_fd, ax, sh->index, &bitsize, bigend, name);
+ f->bitsize = bitsize;
+ break;
+
+ case stTypedef: /* type definition */
+ /* Typedefs for forward declarations and opaque structs from alpha cc
+ are handled by cross_ref, skip them. */
+ if (sh->iss == 0)
+ break;
+
+ /* Parse the type or use the pending type. */
+ pend = is_pending_symbol (cur_fdr, ext_sh);
+ if (pend == (struct mdebug_pending *) NULL)
+ {
+ t = parse_type (cur_fd, ax, sh->index, (int *)NULL, bigend, name);
+ add_pending (cur_fdr, ext_sh, t);
+ }
+ else
+ t = pend->t;
+
+ /* mips cc puts out a typedef with the name of the struct for forward
+ declarations. These should not go into the symbol table and
+ TYPE_NAME should not be set for them.
+ They can't be distinguished from an intentional typedef to
+ the same name however:
+ x.h:
+ struct x { int ix; int jx; };
+ struct xx;
+ x.c:
+ typedef struct x x;
+ struct xx {int ixx; int jxx; };
+ generates a cross referencing stTypedef for x and xx.
+ The user visible effect of this is that the type of a pointer
+ to struct foo sometimes is given as `foo *' instead of `struct foo *'.
+ The problem is fixed with alpha cc. */
+
+ s = new_symbol (name);
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_TYPEDEF;
+ SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block;
+ SYMBOL_TYPE (s) = t;
+ add_symbol (s, top_stack->cur_block);
+
+ /* Incomplete definitions of structs should not get a name. */
+ if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL
+ && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0
+ || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT
+ && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION)))
+ {
+ if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR
+ || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC)
+ {
+ /* If we are giving a name to a type such as "pointer to
+ foo" or "function returning foo", we better not set
+ the TYPE_NAME. If the program contains "typedef char
+ *caddr_t;", we don't want all variables of type char
+ * to print as caddr_t. This is not just a
+ consequence of GDB's type management; CC and GCC (at
+ least through version 2.4) both output variables of
+ either type char * or caddr_t with the type
+ refering to the stTypedef symbol for caddr_t. If a future
+ compiler cleans this up it GDB is not ready for it
+ yet, but if it becomes ready we somehow need to
+ disable this check (without breaking the PCC/GCC2.4
+ case).
+
+ Sigh.
+
+ Fortunately, this check seems not to be necessary
+ for anything except pointers or functions. */
+ }
+ else
+ TYPE_NAME (SYMBOL_TYPE (s)) = SYMBOL_NAME (s);
+ }
+ break;
+
+ case stFile: /* file name */
+ push_parse_stack ();
+ top_stack->blocktype = sh->st;
+ break;
+
+ /* I`ve never seen these for C */
+ case stRegReloc:
+ break; /* register relocation */
+ case stForward:
+ break; /* forwarding address */
+ case stConstant:
+ break; /* constant */
+ default:
+ complain (&unknown_mdebug_symtype_complaint, sh->st);
+ break;
+ }
+
+ return count;
+}
+
+/* Parse the type information provided in the raw AX entries for
+ the symbol SH. Return the bitfield size in BS, in case.
+ We must byte-swap the AX entries before we use them; BIGEND says whether
+ they are big-endian or little-endian (from fh->fBigendian). */
+
+static struct type *
+parse_type (fd, ax, aux_index, bs, bigend, sym_name)
+ int fd;
+ union aux_ext *ax;
+ unsigned int aux_index;
+ int *bs;
+ int bigend;
+ char *sym_name;
+{
+ /* Null entries in this map are treated specially */
+ static struct type **map_bt[] =
+ {
+ &builtin_type_void, /* btNil */
+ 0, /* btAdr */
+ &builtin_type_char, /* btChar */
+ &builtin_type_unsigned_char,/* btUChar */
+ &builtin_type_short, /* btShort */
+ &builtin_type_unsigned_short, /* btUShort */
+ &builtin_type_int, /* btInt */
+ &builtin_type_unsigned_int, /* btUInt */
+ &builtin_type_long, /* btLong */
+ &builtin_type_unsigned_long,/* btULong */
+ &builtin_type_float, /* btFloat */
+ &builtin_type_double, /* btDouble */
+ 0, /* btStruct */
+ 0, /* btUnion */
+ 0, /* btEnum */
+ 0, /* btTypedef */
+ 0, /* btRange */
+ 0, /* btSet */
+ &builtin_type_complex, /* btComplex */
+ &builtin_type_double_complex, /* btDComplex */
+ 0, /* btIndirect */
+ &builtin_type_fixed_dec, /* btFixedDec */
+ &builtin_type_float_dec, /* btFloatDec */
+ &builtin_type_string, /* btString */
+ 0, /* btBit */
+ 0, /* btPicture */
+ &builtin_type_void, /* btVoid */
+ 0, /* DEC C++: Pointer to member */
+ 0, /* DEC C++: Virtual function table */
+ 0, /* DEC C++: Class (Record) */
+ &builtin_type_long, /* btLong64 */
+ &builtin_type_unsigned_long, /* btULong64 */
+ &builtin_type_long_long, /* btLongLong64 */
+ &builtin_type_unsigned_long_long, /* btULongLong64 */
+ &builtin_type_unsigned_long, /* btAdr64 */
+ &builtin_type_long, /* btInt64 */
+ &builtin_type_unsigned_long, /* btUInt64 */
+ };
+
+ TIR t[1];
+ struct type *tp = 0;
+ enum type_code type_code = TYPE_CODE_UNDEF;
+
+ /* Handle corrupt aux indices. */
+ if (aux_index >= (debug_info->fdr + fd)->caux)
+ {
+ complain (&index_complaint, sym_name);
+ return builtin_type_int;
+ }
+ ax += aux_index;
+
+ /* Use aux as a type information record, map its basic type. */
+ ecoff_swap_tir_in (bigend, &ax->a_ti, t);
+ if (t->bt >= (sizeof (map_bt) / sizeof (*map_bt)))
+ {
+ complain (&basic_type_complaint, t->bt, sym_name);
+ return builtin_type_int;
+ }
+ if (map_bt[t->bt])
+ {
+ tp = *map_bt[t->bt];
+ }
+ else
+ {
+ tp = NULL;
+ /* Cannot use builtin types -- build our own */
+ switch (t->bt)
+ {
+ case btAdr:
+ tp = lookup_pointer_type (builtin_type_void);
+ break;
+ case btStruct:
+ type_code = TYPE_CODE_STRUCT;
+ break;
+ case btUnion:
+ type_code = TYPE_CODE_UNION;
+ break;
+ case btEnum:
+ type_code = TYPE_CODE_ENUM;
+ break;
+ case btRange:
+ type_code = TYPE_CODE_RANGE;
+ break;
+ case btSet:
+ type_code = TYPE_CODE_SET;
+ break;
+ case btTypedef:
+ /* alpha cc uses this for typedefs. The true type will be
+ obtained by crossreferencing below. */
+ type_code = TYPE_CODE_ERROR;
+ break;
+ default:
+ complain (&basic_type_complaint, t->bt, sym_name);
+ return builtin_type_int;
+ }
+ }
+
+ /* Move on to next aux */
+ ax++;
+
+ if (t->fBitfield)
+ {
+ /* Inhibit core dumps with some cfront generated objects that
+ corrupt the TIR. */
+ if (bs == (int *)NULL)
+ {
+ complain (&bad_fbitfield_complaint, sym_name);
+ return builtin_type_int;
+ }
+ *bs = AUX_GET_WIDTH (bigend, ax);
+ ax++;
+ }
+
+ /* All these types really point to some (common) MIPS type
+ definition, and only the type-qualifiers fully identify
+ them. We'll make the same effort at sharing. */
+ if (t->bt == btStruct ||
+ t->bt == btUnion ||
+ t->bt == btEnum ||
+
+ /* btSet (I think) implies that the name is a tag name, not a typedef
+ name. This apparently is a MIPS extension for C sets. */
+ t->bt == btSet)
+ {
+ char *name;
+
+ /* Try to cross reference this type, build new type on failure. */
+ ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
+ if (tp == (struct type *) NULL)
+ tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
+
+ /* Make sure that TYPE_CODE(tp) has an expected type code.
+ Any type may be returned from cross_ref if file indirect entries
+ are corrupted. */
+ if (TYPE_CODE (tp) != TYPE_CODE_STRUCT
+ && TYPE_CODE (tp) != TYPE_CODE_UNION
+ && TYPE_CODE (tp) != TYPE_CODE_ENUM)
+ {
+ complain (&unexpected_type_code_complaint, sym_name);
+ }
+ else
+ {
+
+ /* Usually, TYPE_CODE(tp) is already type_code. The main
+ exception is if we guessed wrong re struct/union/enum.
+ But for struct vs. union a wrong guess is harmless, so
+ don't complain(). */
+ if ((TYPE_CODE (tp) == TYPE_CODE_ENUM
+ && type_code != TYPE_CODE_ENUM)
+ || (TYPE_CODE (tp) != TYPE_CODE_ENUM
+ && type_code == TYPE_CODE_ENUM))
+ {
+ complain (&bad_tag_guess_complaint, sym_name);
+ }
+
+ if (TYPE_CODE (tp) != type_code)
+ {
+ TYPE_CODE (tp) = type_code;
+ }
+
+ /* Do not set the tag name if it is a compiler generated tag name
+ (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */
+ if (name[0] == '.' || name[0] == '\0')
+ TYPE_TAG_NAME (tp) = NULL;
+ else if (TYPE_TAG_NAME (tp) == NULL
+ || !STREQ (TYPE_TAG_NAME (tp), name))
+ TYPE_TAG_NAME (tp) = obsavestring (name, strlen (name),
+ ¤t_objfile->type_obstack);
+ }
+ }
+
+ /* All these types really point to some (common) MIPS type
+ definition, and only the type-qualifiers fully identify
+ them. We'll make the same effort at sharing.
+ FIXME: btIndirect cannot happen here as it is handled by the
+ switch t->bt above. And we are not doing any guessing on range types. */
+ if (t->bt == btIndirect ||
+ t->bt == btRange)
+ {
+ char *name;
+
+ /* Try to cross reference this type, build new type on failure. */
+ ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
+ if (tp == (struct type *) NULL)
+ tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
+
+ /* Make sure that TYPE_CODE(tp) has an expected type code.
+ Any type may be returned from cross_ref if file indirect entries
+ are corrupted. */
+ if (TYPE_CODE (tp) != TYPE_CODE_RANGE)
+ {
+ complain (&unexpected_type_code_complaint, sym_name);
+ }
+ else
+ {
+ /* Usually, TYPE_CODE(tp) is already type_code. The main
+ exception is if we guessed wrong re struct/union/enum. */
+ if (TYPE_CODE (tp) != type_code)
+ {
+ complain (&bad_tag_guess_complaint, sym_name);
+ TYPE_CODE (tp) = type_code;
+ }
+ if (TYPE_NAME (tp) == NULL || !STREQ (TYPE_NAME (tp), name))
+ TYPE_NAME (tp) = obsavestring (name, strlen (name),
+ ¤t_objfile->type_obstack);
+ }
+ }
+ if (t->bt == btTypedef)
+ {
+ char *name;
+
+ /* Try to cross reference this type, it should succeed. */
+ ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name);
+ if (tp == (struct type *) NULL)
+ {
+ complain (&unable_to_cross_ref_complaint, sym_name);
+ tp = builtin_type_int;
+ }
+ }
+
+ /* Deal with range types */
+ if (t->bt == btRange)
+ {
+ TYPE_NFIELDS (tp) = 2;
+ TYPE_FIELDS (tp) = ((struct field *)
+ TYPE_ALLOC (tp, 2 * sizeof (struct field)));
+ TYPE_FIELD_NAME (tp, 0) = obsavestring ("Low", strlen ("Low"),
+ ¤t_objfile->type_obstack);
+ TYPE_FIELD_BITPOS (tp, 0) = AUX_GET_DNLOW (bigend, ax);
+ ax++;
+ TYPE_FIELD_NAME (tp, 1) = obsavestring ("High", strlen ("High"),
+ ¤t_objfile->type_obstack);
+ TYPE_FIELD_BITPOS (tp, 1) = AUX_GET_DNHIGH (bigend, ax);
+ ax++;
+ }
+
+ /* Parse all the type qualifiers now. If there are more
+ than 6 the game will continue in the next aux */
+
+ while (1)
+ {
+#define PARSE_TQ(tq) \
+ if (t->tq != tqNil) \
+ ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \
+ else \
+ break;
+
+ PARSE_TQ (tq0);
+ PARSE_TQ (tq1);
+ PARSE_TQ (tq2);
+ PARSE_TQ (tq3);
+ PARSE_TQ (tq4);
+ PARSE_TQ (tq5);
+#undef PARSE_TQ
+
+ /* mips cc 2.x and gcc never put out continued aux entries. */
+ if (!t->continued)
+ break;
+
+ ecoff_swap_tir_in (bigend, &ax->a_ti, t);
+ ax++;
+ }
+
+ /* Complain for illegal continuations due to corrupt aux entries. */
+ if (t->continued)
+ complain (&bad_continued_complaint, sym_name);
+
+ return tp;
+}
+
+/* Make up a complex type from a basic one. Type is passed by
+ reference in TPP and side-effected as necessary. The type
+ qualifier TQ says how to handle the aux symbols at AX for
+ the symbol SX we are currently analyzing. BIGEND says whether
+ aux symbols are big-endian or little-endian.
+ Returns the number of aux symbols we parsed. */
+
+static int
+upgrade_type (fd, tpp, tq, ax, bigend, sym_name)
+ int fd;
+ struct type **tpp;
+ int tq;
+ union aux_ext *ax;
+ int bigend;
+ char *sym_name;
+{
+ int off;
+ struct type *t;
+
+ /* Used in array processing */
+ int rf, id;
+ FDR *fh;
+ struct type *range;
+ struct type *indx;
+ int lower, upper;
+ RNDXR rndx;
+
+ switch (tq)
+ {
+ case tqPtr:
+ t = lookup_pointer_type (*tpp);
+ *tpp = t;
+ return 0;
+
+ case tqProc:
+ t = lookup_function_type (*tpp);
+ *tpp = t;
+ return 0;
+
+ case tqArray:
+ off = 0;
+
+ /* Determine and record the domain type (type of index) */
+ ecoff_swap_rndx_in (bigend, &ax->a_rndx, &rndx);
+ id = rndx.index;
+ rf = rndx.rfd;
+ if (rf == 0xfff)
+ {
+ ax++;
+ rf = AUX_GET_ISYM (bigend, ax);
+ off++;
+ }
+ fh = get_rfd (fd, rf);
+
+ indx = parse_type (fd, debug_info->external_aux + fh->iauxBase,
+ id, (int *) NULL, bigend, sym_name);
+
+ /* The bounds type should be an integer type, but might be anything
+ else due to corrupt aux entries. */
+ if (TYPE_CODE (indx) != TYPE_CODE_INT)
+ {
+ complain (&array_index_type_complaint, sym_name);
+ indx = builtin_type_int;
+ }
+
+ /* Get the bounds, and create the array type. */
+ ax++;
+ lower = AUX_GET_DNLOW (bigend, ax);
+ ax++;
+ upper = AUX_GET_DNHIGH (bigend, ax);
+ ax++;
+ rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */
+
+ range = create_range_type ((struct type *) NULL, indx,
+ lower, upper);
+
+ t = create_array_type ((struct type *) NULL, *tpp, range);
+
+ /* We used to fill in the supplied array element bitsize
+ here if the TYPE_LENGTH of the target type was zero.
+ This happens for a `pointer to an array of anonymous structs',
+ but in this case the array element bitsize is also zero,
+ so nothing is gained.
+ And we used to check the TYPE_LENGTH of the target type against
+ the supplied array element bitsize.
+ gcc causes a mismatch for `pointer to array of object',
+ since the sdb directives it uses do not have a way of
+ specifying the bitsize, but it does no harm (the
+ TYPE_LENGTH should be correct) and we should be able to
+ ignore the erroneous bitsize from the auxiliary entry safely.
+ dbx seems to ignore it too. */
+
+ *tpp = t;
+ return 4 + off;
+
+ case tqVol:
+ /* Volatile -- currently ignored */
+ return 0;
+
+ case tqConst:
+ /* Const -- currently ignored */
+ return 0;
+
+ default:
+ complain (&unknown_type_qual_complaint, tq);
+ return 0;
+ }
+}
+
+
+/* Parse a procedure descriptor record PR. Note that the procedure is
+ parsed _after_ the local symbols, now we just insert the extra
+ information we need into a MIPS_EFI_SYMBOL_NAME symbol that has
+ already been placed in the procedure's main block. Note also that
+ images that have been partially stripped (ld -x) have been deprived
+ of local symbols, and we have to cope with them here. FIRST_OFF is
+ the offset of the first procedure for this FDR; we adjust the
+ address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab
+ to look for the function which contains the MIPS_EFI_SYMBOL_NAME symbol
+ in question, or NULL to use top_stack->cur_block. */
+
+static void parse_procedure PARAMS ((PDR *, struct symtab *, unsigned long));
+
+static void
+parse_procedure (pr, search_symtab, first_off)
+ PDR *pr;
+ struct symtab *search_symtab;
+ unsigned long first_off;
+{
+ struct symbol *s, *i;
+ struct block *b;
+ struct mips_extra_func_info *e;
+ char *sh_name;
+
+ /* Simple rule to find files linked "-x" */
+ if (cur_fdr->rss == -1)
+ {
+ if (pr->isym == -1)
+ {
+ /* Static procedure at address pr->adr. Sigh. */
+ complain (&pdr_static_symbol_complaint, (unsigned long) pr->adr);
+ return;
+ }
+ else
+ {
+ /* external */
+ EXTR she;
+
+ (*debug_swap->swap_ext_in) (cur_bfd,
+ ((char *) debug_info->external_ext
+ + (pr->isym
+ * debug_swap->external_ext_size)),
+ &she);
+ sh_name = debug_info->ssext + she.asym.iss;
+ }
+ }
+ else
+ {
+ /* Full symbols */
+ SYMR sh;
+
+ (*debug_swap->swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + ((cur_fdr->isymBase + pr->isym)
+ * debug_swap->external_sym_size)),
+ &sh);
+ sh_name = debug_info->ss + cur_fdr->issBase + sh.iss;
+ }
+
+ if (search_symtab != NULL)
+ {
+#if 0
+ /* This loses both in the case mentioned (want a static, find a global),
+ but also if we are looking up a non-mangled name which happens to
+ match the name of a mangled function. */
+ /* We have to save the cur_fdr across the call to lookup_symbol.
+ If the pdr is for a static function and if a global function with
+ the same name exists, lookup_symbol will eventually read in the symtab
+ for the global function and clobber cur_fdr. */
+ FDR *save_cur_fdr = cur_fdr;
+ s = lookup_symbol (sh_name, NULL, VAR_NAMESPACE, 0, NULL);
+ cur_fdr = save_cur_fdr;
+#else
+ s = mylookup_symbol
+ (sh_name,
+ BLOCKVECTOR_BLOCK (BLOCKVECTOR (search_symtab), STATIC_BLOCK),
+ VAR_NAMESPACE,
+ LOC_BLOCK);
+#endif
+ }
+ else
+ s = mylookup_symbol (sh_name, top_stack->cur_block,
+ VAR_NAMESPACE, LOC_BLOCK);
+
+ if (s != 0)
+ {
+ b = SYMBOL_BLOCK_VALUE (s);
+ }
+ else
+ {
+ complain (&pdr_for_nonsymbol_complaint, sh_name);
+#if 1
+ return;
+#else
+/* FIXME -- delete. We can't do symbol allocation now; it's all done. */
+ s = new_symbol (sh_name);
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_BLOCK;
+ /* Donno its type, hope int is ok */
+ SYMBOL_TYPE (s) = lookup_function_type (builtin_type_int);
+ add_symbol (s, top_stack->cur_block);
+ /* Wont have symbols for this one */
+ b = new_block (2);
+ SYMBOL_BLOCK_VALUE (s) = b;
+ BLOCK_FUNCTION (b) = s;
+ BLOCK_START (b) = pr->adr;
+ /* BOUND used to be the end of procedure's text, but the
+ argument is no longer passed in. */
+ BLOCK_END (b) = bound;
+ BLOCK_SUPERBLOCK (b) = top_stack->cur_block;
+ add_block (b, top_stack->cur_st);
+#endif
+ }
+
+ i = mylookup_symbol (MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, LOC_CONST);
+
+ if (i)
+ {
+ e = (struct mips_extra_func_info *) SYMBOL_VALUE (i);
+ e->pdr = *pr;
+ e->pdr.isym = (long) s;
+ e->pdr.adr += cur_fdr->adr - first_off;
+
+ /* Correct incorrect setjmp procedure descriptor from the library
+ to make backtrace through setjmp work. */
+ if (e->pdr.pcreg == 0 && STREQ (sh_name, "setjmp"))
+ {
+ complain (&bad_setjmp_pdr_complaint, 0);
+ e->pdr.pcreg = RA_REGNUM;
+ e->pdr.regmask = 0x80000000;
+ e->pdr.regoffset = -4;
+ }
+
+ /* Fake PC_REGNUM for alpha __sigtramp so that read_next_frame_reg
+ will use the saved user pc from the sigcontext. */
+ if (STREQ (sh_name, "__sigtramp"))
+ e->pdr.pcreg = PC_REGNUM;
+ /* Make the same patch for Irix. */
+ if (STREQ (sh_name, "_sigtramp"))
+ e->pdr.pcreg = PC_REGNUM;
+ }
+}
+
+/* Parse the external symbol ES. Just call parse_symbol() after
+ making sure we know where the aux are for it. For procedures,
+ parsing of the PDRs has already provided all the needed
+ information, we only parse them if SKIP_PROCEDURES is false,
+ and only if this causes no symbol duplication.
+ BIGEND says whether aux entries are big-endian or little-endian.
+
+ This routine clobbers top_stack->cur_block and ->cur_st. */
+
+static void
+parse_external (es, skip_procedures, bigend)
+ EXTR *es;
+ int skip_procedures;
+ int bigend;
+{
+ union aux_ext *ax;
+
+ if (es->ifd != ifdNil)
+ {
+ cur_fd = es->ifd;
+ cur_fdr = debug_info->fdr + cur_fd;
+ ax = debug_info->external_aux + cur_fdr->iauxBase;
+ }
+ else
+ {
+ cur_fdr = debug_info->fdr;
+ ax = 0;
+ }
+
+ /* Reading .o files */
+ if (es->asym.sc == scUndefined || es->asym.sc == scNil)
+ {
+ char *what;
+ switch (es->asym.st)
+ {
+ case stNil:
+ /* These are generated for static symbols in .o files,
+ ignore them. */
+ return;
+ case stStaticProc:
+ case stProc:
+ what = "procedure";
+ n_undef_procs++;
+ break;
+ case stGlobal:
+ what = "variable";
+ n_undef_vars++;
+ break;
+ case stLabel:
+ what = "label";
+ n_undef_labels++;
+ break;
+ default:
+ what = "symbol";
+ break;
+ }
+ n_undef_symbols++;
+ /* FIXME: Turn this into a complaint? */
+ if (info_verbose)
+ printf_filtered ("Warning: %s `%s' is undefined (in %s)\n",
+ what, debug_info->ssext + es->asym.iss,
+ fdr_name (cur_fdr));
+ return;
+ }
+
+ switch (es->asym.st)
+ {
+ case stProc:
+ /* If we have full symbols we do not need more */
+ if (skip_procedures)
+ return;
+ if (mylookup_symbol (debug_info->ssext + es->asym.iss,
+ top_stack->cur_block,
+ VAR_NAMESPACE, LOC_BLOCK))
+ break;
+ /* fall through */
+ case stGlobal:
+ case stLabel:
+ /* Note that the case of a symbol with indexNil must be handled
+ anyways by parse_symbol(). */
+ parse_symbol (&es->asym, ax, (char *) NULL, bigend);
+ break;
+ default:
+ break;
+ }
+}
+
+/* Parse the line number info for file descriptor FH into
+ GDB's linetable LT. MIPS' encoding requires a little bit
+ of magic to get things out. Note also that MIPS' line
+ numbers can go back and forth, apparently we can live
+ with that and do not need to reorder our linetables */
+
+static void
+parse_lines (fh, pr, lt, maxlines)
+ FDR *fh;
+ PDR *pr;
+ struct linetable *lt;
+ int maxlines;
+{
+ unsigned char *base;
+ int j, k;
+ int delta, count, lineno = 0;
+ unsigned long first_off = pr->adr;
+
+ if (fh->cbLine == 0)
+ return;
+
+ base = debug_info->line + fh->cbLineOffset;
+
+ /* Scan by procedure descriptors */
+ k = 0;
+ for (j = 0; j < fh->cpd; j++, pr++)
+ {
+ long l;
+ unsigned long adr;
+ unsigned char *halt;
+
+ /* No code for this one */
+ if (pr->iline == ilineNil ||
+ pr->lnLow == -1 || pr->lnHigh == -1)
+ continue;
+
+ /* Determine start and end address of compressed line bytes for
+ this procedure. */
+ base = debug_info->line + fh->cbLineOffset;
+ if (j != (fh->cpd - 1))
+ halt = base + pr[1].cbLineOffset;
+ else
+ halt = base + fh->cbLine;
+ base += pr->cbLineOffset;
+
+ adr = fh->adr + pr->adr - first_off;
+ l = adr >> 2; /* in words */
+ for (lineno = pr->lnLow; base < halt; )
+ {
+ count = *base & 0x0f;
+ delta = *base++ >> 4;
+ if (delta >= 8)
+ delta -= 16;
+ if (delta == -8)
+ {
+ delta = (base[0] << 8) | base[1];
+ if (delta >= 0x8000)
+ delta -= 0x10000;
+ base += 2;
+ }
+ lineno += delta; /* first delta is 0 */
+
+ /* Complain if the line table overflows. Could happen
+ with corrupt binaries. */
+ if (lt->nitems >= maxlines)
+ {
+ complain (&bad_linetable_guess_complaint, fdr_name (fh));
+ break;
+ }
+ k = add_line (lt, lineno, l, k);
+ l += count + 1;
+ }
+ }
+}
+\f
+/* Master parsing procedure for first-pass reading of file symbols
+ into a partial_symtab. */
+
+static void
+parse_partial_symbols (objfile, section_offsets)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+{
+ const bfd_size_type external_sym_size = debug_swap->external_sym_size;
+ const bfd_size_type external_rfd_size = debug_swap->external_rfd_size;
+ const bfd_size_type external_ext_size = debug_swap->external_ext_size;
+ void (* const swap_ext_in) PARAMS ((bfd *, PTR, EXTR *))
+ = debug_swap->swap_ext_in;
+ void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *))
+ = debug_swap->swap_sym_in;
+ void (* const swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *))
+ = debug_swap->swap_rfd_in;
+ int f_idx, s_idx;
+ HDRR *hdr = &debug_info->symbolic_header;
+ /* Running pointers */
+ FDR *fh;
+ char *ext_out;
+ char *ext_out_end;
+ EXTR *ext_block;
+ register EXTR *ext_in;
+ EXTR *ext_in_end;
+ SYMR sh;
+ struct partial_symtab *pst;
+
+ int past_first_source_file = 0;
+
+ /* List of current psymtab's include files */
+ char **psymtab_include_list;
+ int includes_allocated;
+ int includes_used;
+ EXTR *extern_tab;
+ struct pst_map *fdr_to_pst;
+ /* Index within current psymtab dependency list */
+ struct partial_symtab **dependency_list;
+ int dependencies_used, dependencies_allocated;
+ struct cleanup *old_chain;
+ char *name;
+ enum language prev_language;
+
+ extern_tab = (EXTR *) obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (EXTR) * hdr->iextMax);
+
+ includes_allocated = 30;
+ includes_used = 0;
+ psymtab_include_list = (char **) alloca (includes_allocated *
+ sizeof (char *));
+ next_symbol_text_func = mdebug_next_symbol_text;
+
+ dependencies_allocated = 30;
+ dependencies_used = 0;
+ dependency_list =
+ (struct partial_symtab **) alloca (dependencies_allocated *
+ sizeof (struct partial_symtab *));
+
+ last_source_file = NULL;
+
+ /*
+ * Big plan:
+ *
+ * Only parse the Local and External symbols, and the Relative FDR.
+ * Fixup enough of the loader symtab to be able to use it.
+ * Allocate space only for the file's portions we need to
+ * look at. (XXX)
+ */
+
+ max_gdbinfo = 0;
+ max_glevel = MIN_GLEVEL;
+
+ /* Allocate the map FDR -> PST.
+ Minor hack: -O3 images might claim some global data belongs
+ to FDR -1. We`ll go along with that */
+ fdr_to_pst = (struct pst_map *) xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst);
+ old_chain = make_cleanup (free, fdr_to_pst);
+ fdr_to_pst++;
+ {
+ struct partial_symtab *pst = new_psymtab ("", objfile);
+ fdr_to_pst[-1].pst = pst;
+ FDR_IDX (pst) = -1;
+ }
+
+ /* Allocate the global pending list. */
+ pending_list =
+ ((struct mdebug_pending **)
+ obstack_alloc (&objfile->psymbol_obstack,
+ hdr->ifdMax * sizeof (struct mdebug_pending *)));
+ memset ((PTR) pending_list, 0,
+ hdr->ifdMax * sizeof (struct mdebug_pending *));
+
+ /* Pass 0 over external syms: swap them in. */
+ ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR));
+ make_cleanup (free, ext_block);
+
+ ext_out = (char *) debug_info->external_ext;
+ ext_out_end = ext_out + hdr->iextMax * external_ext_size;
+ ext_in = ext_block;
+ for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++)
+ (*swap_ext_in) (cur_bfd, ext_out, ext_in);
+
+ /* Pass 1 over external syms: Presize and partition the list */
+ ext_in = ext_block;
+ ext_in_end = ext_in + hdr->iextMax;
+ for (; ext_in < ext_in_end; ext_in++)
+ {
+ /* See calls to complain below. */
+ if (ext_in->ifd >= -1
+ && ext_in->ifd < hdr->ifdMax
+ && ext_in->asym.iss >= 0
+ && ext_in->asym.iss < hdr->issExtMax)
+ fdr_to_pst[ext_in->ifd].n_globals++;
+ }
+
+ /* Pass 1.5 over files: partition out global symbol space */
+ s_idx = 0;
+ for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++)
+ {
+ fdr_to_pst[f_idx].globals_offset = s_idx;
+ s_idx += fdr_to_pst[f_idx].n_globals;
+ fdr_to_pst[f_idx].n_globals = 0;
+ }
+
+ /* Pass 2 over external syms: fill in external symbols */
+ ext_in = ext_block;
+ ext_in_end = ext_in + hdr->iextMax;
+ for (; ext_in < ext_in_end; ext_in++)
+ {
+ enum minimal_symbol_type ms_type = mst_text;
+
+ /* The Irix 5 native tools seem to sometimes generate bogus
+ external symbols. */
+ if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax)
+ {
+ complain (&bad_ext_ifd_complaint, ext_in->ifd, hdr->ifdMax);
+ continue;
+ }
+ if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax)
+ {
+ complain (&bad_ext_iss_complaint, ext_in->asym.iss,
+ hdr->issExtMax);
+ continue;
+ }
+
+ extern_tab[fdr_to_pst[ext_in->ifd].globals_offset
+ + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in;
+
+ if (ext_in->asym.sc == scUndefined || ext_in->asym.sc == scNil)
+ continue;
+
+ name = debug_info->ssext + ext_in->asym.iss;
+ switch (ext_in->asym.st)
+ {
+ case stProc:
+ break;
+ case stStaticProc:
+ ms_type = mst_file_text;
+ break;
+ case stGlobal:
+ if (ext_in->asym.sc == scData
+ || ext_in->asym.sc == scSData
+ || ext_in->asym.sc == scRData)
+ ms_type = mst_data;
+ else
+ ms_type = mst_bss;
+ break;
+ case stLabel:
+ if (ext_in->asym.sc == scAbs)
+ ms_type = mst_abs;
+ else if (ext_in->asym.sc == scText)
+ ms_type = mst_text;
+ else if (ext_in->asym.sc == scData
+ || ext_in->asym.sc == scSData
+ || ext_in->asym.sc == scRData)
+ ms_type = mst_data;
+ else
+ ms_type = mst_bss;
+ break;
+ case stLocal:
+ /* The alpha has the section start addresses in stLocal symbols
+ whose name starts with a `.'. Skip those but complain for all
+ other stLocal symbols. */
+ if (name[0] == '.')
+ continue;
+ /* Fall through. */
+ default:
+ ms_type = mst_unknown;
+ complain (&unknown_ext_complaint, name);
+ }
+ prim_record_minimal_symbol (name, ext_in->asym.value, ms_type);
+ }
+
+ /* Pass 3 over files, over local syms: fill in static symbols */
+ for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
+ {
+ struct partial_symtab *save_pst;
+ EXTR *ext_ptr;
+
+ cur_fdr = fh = debug_info->fdr + f_idx;
+
+ if (fh->csym == 0)
+ {
+ fdr_to_pst[f_idx].pst = NULL;
+ continue;
+ }
+ pst = start_psymtab_common (objfile, section_offsets,
+ fdr_name (fh),
+ fh->cpd ? fh->adr : 0,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+ pst->read_symtab_private = ((char *)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct symloc)));
+ memset ((PTR) pst->read_symtab_private, 0, sizeof (struct symloc));
+
+ save_pst = pst;
+ FDR_IDX (pst) = f_idx;
+ CUR_BFD (pst) = cur_bfd;
+ DEBUG_SWAP (pst) = debug_swap;
+ DEBUG_INFO (pst) = debug_info;
+ PENDING_LIST (pst) = pending_list;
+
+ /* The way to turn this into a symtab is to call... */
+ pst->read_symtab = mdebug_psymtab_to_symtab;
+
+ /* Set up language for the pst.
+ The language from the FDR is used if it is unambigious (e.g. cfront
+ with native cc and g++ will set the language to C).
+ Otherwise we have to deduce the language from the filename.
+ Native ecoff has every header file in a separate FDR, so
+ deduce_language_from_filename will return language_unknown for
+ a header file, which is not what we want.
+ But the FDRs for the header files are after the FDR for the source
+ file, so we can assign the language of the source file to the
+ following header files. Then we save the language in the private
+ pst data so that we can reuse it when building symtabs. */
+ prev_language = psymtab_language;
+
+ switch (fh->lang)
+ {
+ case langCplusplusV2:
+ psymtab_language = language_cplus;
+ break;
+ default:
+ psymtab_language = deduce_language_from_filename (fdr_name (fh));
+ break;
+ }
+ if (psymtab_language == language_unknown)
+ psymtab_language = prev_language;
+ PST_PRIVATE (pst)->pst_language = psymtab_language;
+
+ pst->texthigh = pst->textlow;
+
+ /* For stabs-in-ecoff files, the second symbol must be @stab.
+ This symbol is emitted by mips-tfile to signal that the
+ current object file uses encapsulated stabs instead of mips
+ ecoff for local symbols. (It is the second symbol because
+ the first symbol is the stFile used to signal the start of a
+ file). */
+ processing_gcc_compilation = 0;
+ if (fh->csym >= 2)
+ {
+ (*swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + (fh->isymBase + 1) * external_sym_size),
+ &sh);
+ if (STREQ (debug_info->ss + fh->issBase + sh.iss, stabs_symbol))
+ processing_gcc_compilation = 2;
+ }
+
+ if (processing_gcc_compilation != 0)
+ {
+ for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
+ {
+ int type_code;
+ char *namestring;
+
+ (*swap_sym_in) (cur_bfd,
+ (((char *) debug_info->external_sym)
+ + (fh->isymBase + cur_sdx) * external_sym_size),
+ &sh);
+ type_code = ECOFF_UNMARK_STAB (sh.index);
+ if (!ECOFF_IS_STAB (&sh))
+ {
+ if (sh.st == stProc || sh.st == stStaticProc)
+ {
+ long procaddr = sh.value;
+ long isym;
+
+
+ isym = AUX_GET_ISYM (fh->fBigendian,
+ (debug_info->external_aux
+ + fh->iauxBase
+ + sh.index));
+ (*swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + ((fh->isymBase + isym - 1)
+ * external_sym_size)),
+ &sh);
+ if (sh.st == stEnd)
+ {
+ long high = procaddr + sh.value;
+ if (high > pst->texthigh)
+ pst->texthigh = high;
+ }
+ }
+ continue;
+ }
+#define SET_NAMESTRING() \
+ namestring = debug_info->ss + fh->issBase + sh.iss
+#define CUR_SYMBOL_TYPE type_code
+#define CUR_SYMBOL_VALUE sh.value
+#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
+ pst = save_pst
+#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) (void)0
+#define HANDLE_RBRAC(val) \
+ if ((val) > save_pst->texthigh) save_pst->texthigh = (val);
+#include "partial-stab.h"
+ }
+ }
+ else
+ {
+ for (cur_sdx = 0; cur_sdx < fh->csym;)
+ {
+ char *name;
+ enum address_class class;
+
+ (*swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + ((fh->isymBase + cur_sdx)
+ * external_sym_size)),
+ &sh);
+
+ if (ECOFF_IS_STAB (&sh))
+ {
+ cur_sdx++;
+ continue;
+ }
+
+ /* Non absolute static symbols go into the minimal table. */
+ if (sh.sc == scUndefined || sh.sc == scNil
+ || (sh.index == indexNil
+ && (sh.st != stStatic || sh.sc == scAbs)))
+ {
+ /* FIXME, premature? */
+ cur_sdx++;
+ continue;
+ }
+
+ name = debug_info->ss + fh->issBase + sh.iss;
+
+ switch (sh.st)
+ {
+ long high;
+ long procaddr;
+ int new_sdx;
+
+ case stStaticProc: /* Function */
+ /* I believe this is used only for file-local functions.
+ The comment in symconst.h ("load time only static procs")
+ isn't particularly clear on this point. */
+ prim_record_minimal_symbol (name, sh.value, mst_file_text);
+ /* FALLTHROUGH */
+
+ case stProc: /* Asm labels apparently */
+ ADD_PSYMBOL_TO_LIST (name, strlen (name),
+ VAR_NAMESPACE, LOC_BLOCK,
+ objfile->static_psymbols, sh.value,
+ psymtab_language, objfile);
+ /* Skip over procedure to next one. */
+ if (sh.index >= hdr->iauxMax)
+ {
+ /* Should not happen, but does when cross-compiling
+ with the MIPS compiler. FIXME -- pull later. */
+ complain (&index_complaint, name);
+ new_sdx = cur_sdx + 1; /* Don't skip at all */
+ }
+ else
+ new_sdx = AUX_GET_ISYM (fh->fBigendian,
+ (debug_info->external_aux
+ + fh->iauxBase
+ + sh.index));
+ procaddr = sh.value;
+
+ if (new_sdx <= cur_sdx)
+ {
+ /* This should not happen either... FIXME. */
+ complain (&aux_index_complaint, name);
+ new_sdx = cur_sdx + 1; /* Don't skip backward */
+ }
+
+ cur_sdx = new_sdx;
+ (*swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + ((fh->isymBase + cur_sdx - 1)
+ * external_sym_size)),
+ &sh);
+ if (sh.st != stEnd)
+ continue;
+ high = procaddr + sh.value;
+ if (high > pst->texthigh)
+ pst->texthigh = high;
+ continue;
+
+ case stStatic: /* Variable */
+ if (sh.sc == scData || sh.sc == scSData || sh.sc == scRData)
+ prim_record_minimal_symbol (name, sh.value, mst_file_data);
+ else
+ prim_record_minimal_symbol (name, sh.value, mst_file_bss);
+ class = LOC_STATIC;
+ break;
+
+ case stTypedef:/* Typedef */
+ /* Skip typedefs for forward declarations and opaque
+ structs from alpha cc. */
+ if (sh.iss == 0)
+ goto skip;
+ class = LOC_TYPEDEF;
+ break;
+
+ case stConstant: /* Constant decl */
+ class = LOC_CONST;
+ break;
+
+ case stUnion:
+ case stStruct:
+ case stEnum:
+ case stBlock: /* { }, str, un, enum*/
+ /* Do not create a partial symbol for cc unnamed aggregates
+ and gcc empty aggregates. */
+ if ((sh.sc == scInfo || sh.sc == scCommon)
+ && sh.iss != 0
+ && sh.index != cur_sdx + 2)
+ {
+ ADD_PSYMBOL_TO_LIST (name, strlen (name),
+ STRUCT_NAMESPACE, LOC_TYPEDEF,
+ objfile->static_psymbols,
+ sh.value,
+ psymtab_language, objfile);
+ }
+ /* Skip over the block */
+ new_sdx = sh.index;
+ if (new_sdx <= cur_sdx)
+ {
+ /* This happens with the Ultrix kernel. */
+ complain (&block_index_complaint, name);
+ new_sdx = cur_sdx + 1; /* Don't skip backward */
+ }
+ cur_sdx = new_sdx;
+ continue;
+
+ case stFile: /* File headers */
+ case stLabel: /* Labels */
+ case stEnd: /* Ends of files */
+ goto skip;
+
+ case stLocal: /* Local variables */
+ /* Normally these are skipped because we skip over
+ all blocks we see. However, these can occur
+ as visible symbols in a .h file that contains code. */
+ goto skip;
+
+ default:
+ /* Both complaints are valid: one gives symbol name,
+ the other the offending symbol type. */
+ complain (&unknown_sym_complaint, name);
+ complain (&unknown_st_complaint, sh.st);
+ cur_sdx++;
+ continue;
+ }
+ /* Use this gdb symbol */
+ ADD_PSYMBOL_TO_LIST (name, strlen (name),
+ VAR_NAMESPACE, class,
+ objfile->static_psymbols, sh.value,
+ psymtab_language, objfile);
+ skip:
+ cur_sdx++; /* Go to next file symbol */
+ }
+
+ /* Now do enter the external symbols. */
+ ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset];
+ cur_sdx = fdr_to_pst[f_idx].n_globals;
+ PST_PRIVATE (save_pst)->extern_count = cur_sdx;
+ PST_PRIVATE (save_pst)->extern_tab = ext_ptr;
+ for (; --cur_sdx >= 0; ext_ptr++)
+ {
+ enum address_class class;
+ SYMR *psh;
+ char *name;
+
+ if (ext_ptr->ifd != f_idx)
+ abort ();
+ psh = &ext_ptr->asym;
+
+ /* Do not add undefined symbols to the partial symbol table. */
+ if (psh->sc == scUndefined || psh->sc == scNil)
+ continue;
+
+ switch (psh->st)
+ {
+ case stNil:
+ /* These are generated for static symbols in .o files,
+ ignore them. */
+ continue;
+ case stProc:
+ case stStaticProc:
+ class = LOC_BLOCK;
+ break;
+ case stLabel:
+ class = LOC_LABEL;
+ break;
+ default:
+ complain (&unknown_ext_complaint,
+ debug_info->ssext + psh->iss);
+ /* Fall through, pretend it's global. */
+ case stGlobal:
+ class = LOC_STATIC;
+ break;
+ }
+ name = debug_info->ssext + psh->iss;
+ ADD_PSYMBOL_ADDR_TO_LIST (name, strlen (name),
+ VAR_NAMESPACE, class,
+ objfile->global_psymbols,
+ (CORE_ADDR) psh->value,
+ psymtab_language, objfile);
+ }
+ }
+
+ /* Link pst to FDR. end_psymtab returns NULL if the psymtab was
+ empty and put on the free list. */
+ fdr_to_pst[f_idx].pst = end_psymtab (save_pst,
+ psymtab_include_list, includes_used,
+ -1, save_pst->texthigh,
+ dependency_list, dependencies_used);
+ if (objfile->ei.entry_point >= save_pst->textlow &&
+ objfile->ei.entry_point < save_pst->texthigh)
+ {
+ objfile->ei.entry_file_lowpc = save_pst->textlow;
+ objfile->ei.entry_file_highpc = save_pst->texthigh;
+ }
+ }
+
+ /* Now scan the FDRs for dependencies */
+ for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++)
+ {
+ fh = f_idx + debug_info->fdr;
+ pst = fdr_to_pst[f_idx].pst;
+
+ if (pst == (struct partial_symtab *)NULL)
+ continue;
+
+ /* This should catch stabs-in-ecoff. */
+ if (fh->crfd <= 1)
+ continue;
+
+ /* Skip the first file indirect entry as it is a self dependency
+ for source files or a reverse .h -> .c dependency for header files. */
+ pst->number_of_dependencies = 0;
+ pst->dependencies =
+ ((struct partial_symtab **)
+ obstack_alloc (&objfile->psymbol_obstack,
+ ((fh->crfd - 1)
+ * sizeof (struct partial_symtab *))));
+ for (s_idx = 1; s_idx < fh->crfd; s_idx++)
+ {
+ RFDT rh;
+
+ (*swap_rfd_in) (cur_bfd,
+ ((char *) debug_info->external_rfd
+ + (fh->rfdBase + s_idx) * external_rfd_size),
+ &rh);
+ if (rh < 0 || rh >= hdr->ifdMax)
+ {
+ complain (&bad_file_number_complaint, rh);
+ continue;
+ }
+
+ /* Skip self dependencies of header files. */
+ if (rh == f_idx)
+ continue;
+
+ /* Do not add to dependeny list if psymtab was empty. */
+ if (fdr_to_pst[rh].pst == (struct partial_symtab *)NULL)
+ continue;
+ pst->dependencies[pst->number_of_dependencies++] = fdr_to_pst[rh].pst;
+ }
+ }
+ do_cleanups (old_chain);
+}
+
+
+static char *
+mdebug_next_symbol_text ()
+{
+ SYMR sh;
+
+ cur_sdx++;
+ (*debug_swap->swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + ((cur_fdr->isymBase + cur_sdx)
+ * debug_swap->external_sym_size)),
+ &sh);
+ return debug_info->ss + cur_fdr->issBase + sh.iss;
+}
+
+/* Ancillary function to psymtab_to_symtab(). Does all the work
+ for turning the partial symtab PST into a symtab, recurring
+ first on all dependent psymtabs. The argument FILENAME is
+ only passed so we can see in debug stack traces what file
+ is being read.
+
+ This function has a split personality, based on whether the
+ symbol table contains ordinary ecoff symbols, or stabs-in-ecoff.
+ The flow of control and even the memory allocation differs. FIXME. */
+
+static void
+psymtab_to_symtab_1 (pst, filename)
+ struct partial_symtab *pst;
+ char *filename;
+{
+ bfd_size_type external_sym_size;
+ bfd_size_type external_pdr_size;
+ void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
+ void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
+ int i;
+ struct symtab *st;
+ FDR *fh;
+ struct linetable *lines;
+
+ if (pst->readin)
+ return;
+ pst->readin = 1;
+
+ /* Read in all partial symbtabs on which this one is dependent.
+ NOTE that we do have circular dependencies, sigh. We solved
+ that by setting pst->readin before this point. */
+
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files to be read in. */
+ if (info_verbose)
+ {
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...",
+ pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output */
+ gdb_flush (gdb_stdout);
+ }
+ /* We only pass the filename for debug purposes */
+ psymtab_to_symtab_1 (pst->dependencies[i],
+ pst->dependencies[i]->filename);
+ }
+
+ /* Do nothing if this is a dummy psymtab. */
+
+ if (pst->n_global_syms == 0 && pst->n_static_syms == 0
+ && pst->textlow == 0 && pst->texthigh == 0)
+ return;
+
+ /* Now read the symbols for this symtab */
+
+ cur_bfd = CUR_BFD (pst);
+ debug_swap = DEBUG_SWAP (pst);
+ debug_info = DEBUG_INFO (pst);
+ pending_list = PENDING_LIST (pst);
+ external_sym_size = debug_swap->external_sym_size;
+ external_pdr_size = debug_swap->external_pdr_size;
+ swap_sym_in = debug_swap->swap_sym_in;
+ swap_pdr_in = debug_swap->swap_pdr_in;
+ current_objfile = pst->objfile;
+ cur_fd = FDR_IDX (pst);
+ fh = ((cur_fd == -1)
+ ? (FDR *) NULL
+ : debug_info->fdr + cur_fd);
+ cur_fdr = fh;
+
+ /* See comment in parse_partial_symbols about the @stabs sentinel. */
+ processing_gcc_compilation = 0;
+ if (fh != (FDR *) NULL && fh->csym >= 2)
+ {
+ SYMR sh;
+
+ (*swap_sym_in) (cur_bfd,
+ ((char *) debug_info->external_sym
+ + (fh->isymBase + 1) * external_sym_size),
+ &sh);
+ if (STREQ (debug_info->ss + fh->issBase + sh.iss,
+ stabs_symbol))
+ {
+ /* We indicate that this is a GCC compilation so that certain
+ features will be enabled in stabsread/dbxread. */
+ processing_gcc_compilation = 2;
+ }
+ }
+
+ if (processing_gcc_compilation != 0)
+ {
+ char *pdr_ptr;
+ char *pdr_end;
+ int first_pdr;
+ unsigned long first_off = 0;
+
+ /* This symbol table contains stabs-in-ecoff entries. */
+
+ /* Parse local symbols first */
+
+ if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr */
+ {
+ current_objfile = NULL;
+ return;
+ }
+ for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++)
+ {
+ SYMR sh;
+ char *name;
+ CORE_ADDR valu;
+
+ (*swap_sym_in) (cur_bfd,
+ (((char *) debug_info->external_sym)
+ + (fh->isymBase + cur_sdx) * external_sym_size),
+ &sh);
+ name = debug_info->ss + fh->issBase + sh.iss;
+ valu = sh.value;
+ if (ECOFF_IS_STAB (&sh))
+ {
+ int type_code = ECOFF_UNMARK_STAB (sh.index);
+ process_one_symbol (type_code, 0, valu, name,
+ pst->section_offsets, pst->objfile);
+ if (type_code == N_FUN)
+ {
+ /* Make up special symbol to contain
+ procedure specific info */
+ struct mips_extra_func_info *e =
+ ((struct mips_extra_func_info *)
+ obstack_alloc (¤t_objfile->symbol_obstack,
+ sizeof (struct mips_extra_func_info)));
+ struct symbol *s = new_symbol (MIPS_EFI_SYMBOL_NAME);
+ SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_CONST;
+ SYMBOL_TYPE (s) = builtin_type_void;
+ SYMBOL_VALUE (s) = (long) e;
+ add_symbol_to_list (s, &local_symbols);
+ }
+ }
+ else if (sh.st == stLabel && sh.index != indexNil)
+ {
+ /* Handle encoded stab line number. */
+ record_line (current_subfile, sh.index, valu);
+ }
+ else if (sh.st == stProc || sh.st == stStaticProc || sh.st == stEnd)
+ /* These are generated by gcc-2.x, do not complain */
+ ;
+ else
+ complain (&stab_unknown_complaint, name);
+ }
+ st = end_symtab (pst->texthigh, 0, 0, pst->objfile, SECT_OFF_TEXT);
+ end_stabs ();
+
+ /* Sort the symbol table now, we are done adding symbols to it.
+ We must do this before parse_procedure calls lookup_symbol. */
+ sort_symtab_syms (st);
+
+ /* This may not be necessary for stabs symtabs. FIXME. */
+ sort_blocks (st);
+
+ /* Fill in procedure info next. */
+ first_pdr = 1;
+ pdr_ptr = ((char *) debug_info->external_pdr
+ + fh->ipdFirst * external_pdr_size);
+ pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
+ for (; pdr_ptr < pdr_end; pdr_ptr += external_pdr_size)
+ {
+ PDR pr;
+
+ (*swap_pdr_in) (cur_bfd, pdr_ptr, &pr);
+ if (first_pdr)
+ {
+ first_off = pr.adr;
+ first_pdr = 0;
+ }
+ parse_procedure (&pr, st, first_off);
+ }
+ }
+ else
+ {
+ /* This symbol table contains ordinary ecoff entries. */
+
+ /* FIXME: doesn't use pst->section_offsets. */
+
+ int f_max;
+ int maxlines;
+ EXTR *ext_ptr;
+
+ /* How many symbols will we need */
+ /* FIXME, this does not count enum values. */
+ f_max = pst->n_global_syms + pst->n_static_syms;
+ if (fh == 0)
+ {
+ maxlines = 0;
+ st = new_symtab ("unknown", f_max, 0, pst->objfile);
+ }
+ else
+ {
+ f_max += fh->csym + fh->cpd;
+ maxlines = 2 * fh->cline;
+ st = new_symtab (pst->filename, 2 * f_max, maxlines, pst->objfile);
+
+ /* The proper language was already determined when building
+ the psymtab, use it. */
+ st->language = PST_PRIVATE (pst)->pst_language;
+ }
+
+ psymtab_language = st->language;
+
+ lines = LINETABLE (st);
+
+ /* Get a new lexical context */
+
+ push_parse_stack ();
+ top_stack->cur_st = st;
+ top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (st),
+ STATIC_BLOCK);
+ BLOCK_START (top_stack->cur_block) = fh ? fh->adr : 0;
+ BLOCK_END (top_stack->cur_block) = 0;
+ top_stack->blocktype = stFile;
+ top_stack->maxsyms = 2 * f_max;
+ top_stack->cur_type = 0;
+ top_stack->procadr = 0;
+ top_stack->numargs = 0;
+
+ if (fh)
+ {
+ char *sym_ptr;
+ char *sym_end;
+
+ /* Parse local symbols first */
+ sym_ptr = ((char *) debug_info->external_sym
+ + fh->isymBase * external_sym_size);
+ sym_end = sym_ptr + fh->csym * external_sym_size;
+ while (sym_ptr < sym_end)
+ {
+ SYMR sh;
+ int c;
+
+ (*swap_sym_in) (cur_bfd, sym_ptr, &sh);
+ c = parse_symbol (&sh,
+ debug_info->external_aux + fh->iauxBase,
+ sym_ptr, fh->fBigendian);
+ sym_ptr += c * external_sym_size;
+ }
+
+ /* Linenumbers. At the end, check if we can save memory.
+ parse_lines has to look ahead an arbitrary number of PDR
+ structures, so we swap them all first. */
+ if (fh->cpd > 0)
+ {
+ PDR *pr_block;
+ struct cleanup *old_chain;
+ char *pdr_ptr;
+ char *pdr_end;
+ PDR *pdr_in;
+ PDR *pdr_in_end;
+
+ pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR));
+
+ old_chain = make_cleanup (free, pr_block);
+
+ pdr_ptr = ((char *) debug_info->external_pdr
+ + fh->ipdFirst * external_pdr_size);
+ pdr_end = pdr_ptr + fh->cpd * external_pdr_size;
+ pdr_in = pr_block;
+ for (;
+ pdr_ptr < pdr_end;
+ pdr_ptr += external_pdr_size, pdr_in++)
+ (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in);
+
+ parse_lines (fh, pr_block, lines, maxlines);
+ if (lines->nitems < fh->cline)
+ lines = shrink_linetable (lines);
+
+ /* Fill in procedure info next. */
+ pdr_in = pr_block;
+ pdr_in_end = pdr_in + fh->cpd;
+ for (; pdr_in < pdr_in_end; pdr_in++)
+ parse_procedure (pdr_in, 0, pr_block->adr);
+
+ do_cleanups (old_chain);
+ }
+ }
+
+ LINETABLE (st) = lines;
+
+ /* .. and our share of externals.
+ XXX use the global list to speed up things here. how?
+ FIXME, Maybe quit once we have found the right number of ext's? */
+ top_stack->cur_st = st;
+ top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st),
+ GLOBAL_BLOCK);
+ top_stack->blocktype = stFile;
+ top_stack->maxsyms
+ = (debug_info->symbolic_header.isymMax
+ + debug_info->symbolic_header.ipdMax
+ + debug_info->symbolic_header.iextMax);
+
+ ext_ptr = PST_PRIVATE (pst)->extern_tab;
+ for (i = PST_PRIVATE (pst)->extern_count; --i >= 0; ext_ptr++)
+ parse_external (ext_ptr, 1, fh->fBigendian);
+
+ /* If there are undefined symbols, tell the user.
+ The alpha has an undefined symbol for every symbol that is
+ from a shared library, so tell the user only if verbose is on. */
+ if (info_verbose && n_undef_symbols)
+ {
+ printf_filtered ("File %s contains %d unresolved references:",
+ st->filename, n_undef_symbols);
+ printf_filtered ("\n\t%4d variables\n\t%4d procedures\n\t%4d labels\n",
+ n_undef_vars, n_undef_procs, n_undef_labels);
+ n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0;
+
+ }
+ pop_parse_stack ();
+
+ /* Sort the symbol table now, we are done adding symbols to it.*/
+ sort_symtab_syms (st);
+
+ sort_blocks (st);
+ }
+
+ /* Now link the psymtab and the symtab. */
+ pst->symtab = st;
+
+ current_objfile = NULL;
+}
+\f
+/* Ancillary parsing procedures. */
+
+/* Lookup the type at relative index RN. Return it in TPP
+ if found and in any event come up with its name PNAME.
+ BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian).
+ Return value says how many aux symbols we ate. */
+
+static int
+cross_ref (fd, ax, tpp, type_code, pname, bigend, sym_name)
+ int fd;
+ union aux_ext *ax;
+ struct type **tpp;
+ enum type_code type_code; /* Use to alloc new type if none is found. */
+ char **pname;
+ int bigend;
+ char *sym_name;
+{
+ RNDXR rn[1];
+ unsigned int rf;
+ int result = 1;
+ FDR *fh;
+ char *esh;
+ SYMR sh;
+ int xref_fd;
+ struct mdebug_pending *pend;
+
+ *tpp = (struct type *)NULL;
+
+ ecoff_swap_rndx_in (bigend, &ax->a_rndx, rn);
+
+ /* Escape index means 'the next one' */
+ if (rn->rfd == 0xfff)
+ {
+ result++;
+ rf = AUX_GET_ISYM (bigend, ax + 1);
+ }
+ else
+ {
+ rf = rn->rfd;
+ }
+
+ /* mips cc uses a rf of -1 for opaque struct definitions.
+ Set TYPE_FLAG_STUB for these types so that check_stub_type will
+ resolve them if the struct gets defined in another compilation unit. */
+ if (rf == -1)
+ {
+ *pname = "<undefined>";
+ *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
+ TYPE_FLAGS (*tpp) |= TYPE_FLAG_STUB;
+ return result;
+ }
+
+ /* mips cc uses an escaped rn->index of 0 for struct return types
+ of procedures that were compiled without -g. These will always remain
+ undefined. */
+ if (rn->rfd == 0xfff && rn->index == 0)
+ {
+ *pname = "<undefined>";
+ return result;
+ }
+
+ /* Find the relative file descriptor and the symbol in it. */
+ fh = get_rfd (fd, rf);
+ xref_fd = fh - debug_info->fdr;
+
+ if (rn->index >= fh->csym)
+ {
+ /* File indirect entry is corrupt. */
+ *pname = "<illegal>";
+ complain (&bad_rfd_entry_complaint,
+ sym_name, xref_fd, rn->index);
+ return result;
+ }
+
+ /* If we have processed this symbol then we left a forwarding
+ pointer to the type in the pending list. If not, we`ll put
+ it in a list of pending types, to be processed later when
+ the file will be. In any event, we collect the name for the
+ type here. */
+
+ esh = ((char *) debug_info->external_sym
+ + ((fh->isymBase + rn->index)
+ * debug_swap->external_sym_size));
+ (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh);
+
+ /* Make sure that this type of cross reference can be handled. */
+ if (sh.sc != scInfo
+ || (sh.st != stBlock && sh.st != stTypedef
+ && sh.st != stStruct && sh.st != stUnion
+ && sh.st != stEnum))
+ {
+ /* File indirect entry is corrupt. */
+ *pname = "<illegal>";
+ complain (&bad_rfd_entry_complaint,
+ sym_name, xref_fd, rn->index);
+ return result;
+ }
+
+ *pname = debug_info->ss + fh->issBase + sh.iss;
+
+ pend = is_pending_symbol (fh, esh);
+ if (pend)
+ *tpp = pend->t;
+ else
+ {
+ /* We have not yet seen this type. */
+
+ if (sh.iss == 0 && sh.st == stTypedef)
+ {
+ TIR tir;
+
+ /* alpha cc puts out a stTypedef with a sh.iss of zero for
+ two cases:
+ a) forward declarations of structs/unions/enums which are not
+ defined in this compilation unit.
+ For these the type will be void. This is a bad design decision
+ as cross referencing across compilation units is impossible
+ due to the missing name.
+ b) forward declarations of structs/unions/enums which are defined
+ later in this file or in another file in the same compilation
+ unit. Simply cross reference those again to get the
+ true type.
+ The forward references are not entered in the pending list and
+ in the symbol table. */
+
+ ecoff_swap_tir_in (bigend,
+ &(debug_info->external_aux
+ + fh->iauxBase + sh.index)->a_ti,
+ &tir);
+ if (tir.tq0 != tqNil)
+ complain (&illegal_forward_tq0_complaint, sym_name);
+ switch (tir.bt)
+ {
+ case btVoid:
+ *tpp = init_type (type_code, 0, 0, (char *) NULL,
+ current_objfile);
+ *pname = "<undefined>";
+ break;
+
+ case btStruct:
+ case btUnion:
+ case btEnum:
+ cross_ref (xref_fd,
+ (debug_info->external_aux
+ + fh->iauxBase + sh.index + 1),
+ tpp, type_code, pname,
+ fh->fBigendian, sym_name);
+ break;
+
+ default:
+ complain (&illegal_forward_bt_complaint, tir.bt, sym_name);
+ *tpp = init_type (type_code, 0, 0, (char *) NULL,
+ current_objfile);
+ break;
+ }
+ return result;
+ }
+ else if (sh.st == stTypedef)
+ {
+ /* Parse the type for a normal typedef. This might recursively call
+ cross_ref till we get a non typedef'ed type.
+ FIXME: This is not correct behaviour, but gdb currently
+ cannot handle typedefs without type copying. But type copying is
+ impossible as we might have mutual forward references between
+ two files and the copied type would not get filled in when
+ we later parse its definition. */
+ *tpp = parse_type (xref_fd,
+ debug_info->external_aux + fh->iauxBase,
+ sh.index,
+ (int *)NULL,
+ fh->fBigendian,
+ debug_info->ss + fh->issBase + sh.iss);
+ }
+ else
+ {
+ /* Cross reference to a struct/union/enum which is defined
+ in another file in the same compilation unit but that file
+ has not been parsed yet.
+ Initialize the type only, it will be filled in when
+ it's definition is parsed. */
+ *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile);
+ }
+ add_pending (fh, esh, *tpp);
+ }
+
+ /* We used one auxent normally, two if we got a "next one" rf. */
+ return result;
+}
+
+
+/* Quick&dirty lookup procedure, to avoid the MI ones that require
+ keeping the symtab sorted */
+
+static struct symbol *
+mylookup_symbol (name, block, namespace, class)
+ char *name;
+ register struct block *block;
+ enum namespace namespace;
+ enum address_class class;
+{
+ register int bot, top, inc;
+ register struct symbol *sym;
+
+ bot = 0;
+ top = BLOCK_NSYMS (block);
+ inc = name[0];
+ while (bot < top)
+ {
+ sym = BLOCK_SYM (block, bot);
+ if (SYMBOL_NAME (sym)[0] == inc
+ && SYMBOL_NAMESPACE (sym) == namespace
+ && SYMBOL_CLASS (sym) == class
+ && strcmp (SYMBOL_NAME (sym), name) == 0)
+ return sym;
+ bot++;
+ }
+ block = BLOCK_SUPERBLOCK (block);
+ if (block)
+ return mylookup_symbol (name, block, namespace, class);
+ return 0;
+}
+
+
+/* Add a new symbol S to a block B.
+ Infrequently, we will need to reallocate the block to make it bigger.
+ We only detect this case when adding to top_stack->cur_block, since
+ that's the only time we know how big the block is. FIXME. */
+
+static void
+add_symbol (s, b)
+ struct symbol *s;
+ struct block *b;
+{
+ int nsyms = BLOCK_NSYMS (b)++;
+ struct block *origb;
+ struct parse_stack *stackp;
+
+ if (b == top_stack->cur_block &&
+ nsyms >= top_stack->maxsyms)
+ {
+ complain (&block_overflow_complaint, SYMBOL_NAME (s));
+ /* In this case shrink_block is actually grow_block, since
+ BLOCK_NSYMS(b) is larger than its current size. */
+ origb = b;
+ b = shrink_block (top_stack->cur_block, top_stack->cur_st);
+
+ /* Now run through the stack replacing pointers to the
+ original block. shrink_block has already done this
+ for the blockvector and BLOCK_FUNCTION. */
+ for (stackp = top_stack; stackp; stackp = stackp->next)
+ {
+ if (stackp->cur_block == origb)
+ {
+ stackp->cur_block = b;
+ stackp->maxsyms = BLOCK_NSYMS (b);
+ }
+ }
+ }
+ BLOCK_SYM (b, nsyms) = s;
+}
+
+/* Add a new block B to a symtab S */
+
+static void
+add_block (b, s)
+ struct block *b;
+ struct symtab *s;
+{
+ struct blockvector *bv = BLOCKVECTOR (s);
+
+ bv = (struct blockvector *) xrealloc ((PTR) bv,
+ (sizeof (struct blockvector)
+ + BLOCKVECTOR_NBLOCKS (bv)
+ * sizeof (bv->block)));
+ if (bv != BLOCKVECTOR (s))
+ BLOCKVECTOR (s) = bv;
+
+ BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b;
+}
+
+/* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
+ MIPS' linenumber encoding might need more than one byte
+ to describe it, LAST is used to detect these continuation lines.
+
+ Combining lines with the same line number seems like a bad idea.
+ E.g: There could be a line number entry with the same line number after the
+ prologue and GDB should not ignore it (this is a better way to find
+ a prologue than mips_skip_prologue).
+ But due to the compressed line table format there are line number entries
+ for the same line which are needed to bridge the gap to the next
+ line number entry. These entries have a bogus address info with them
+ and we are unable to tell them from intended duplicate line number
+ entries.
+ This is another reason why -ggdb debugging format is preferable. */
+
+static int
+add_line (lt, lineno, adr, last)
+ struct linetable *lt;
+ int lineno;
+ CORE_ADDR adr;
+ int last;
+{
+ if (last == 0)
+ last = -2; /* make sure we record first line */
+
+ if (last == lineno) /* skip continuation lines */
+ return lineno;
+
+ lt->item[lt->nitems].line = lineno;
+ lt->item[lt->nitems++].pc = adr << 2;
+ return lineno;
+}
+\f
+/* Sorting and reordering procedures */
+
+/* Blocks with a smaller low bound should come first */
+
+static int
+compare_blocks (arg1, arg2)
+ const PTR arg1;
+ const PTR arg2;
+{
+ register int addr_diff;
+ struct block **b1 = (struct block **) arg1;
+ struct block **b2 = (struct block **) arg2;
+
+ addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2)));
+ if (addr_diff == 0)
+ return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1)));
+ return addr_diff;
+}
+
+/* Sort the blocks of a symtab S.
+ Reorder the blocks in the blockvector by code-address,
+ as required by some MI search routines */
+
+static void
+sort_blocks (s)
+ struct symtab *s;
+{
+ struct blockvector *bv = BLOCKVECTOR (s);
+
+ if (BLOCKVECTOR_NBLOCKS (bv) <= 2)
+ {
+ /* Cosmetic */
+ if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0)
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0;
+ if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0)
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0;
+ return;
+ }
+ /*
+ * This is very unfortunate: normally all functions are compiled in
+ * the order they are found, but if the file is compiled -O3 things
+ * are very different. It would be nice to find a reliable test
+ * to detect -O3 images in advance.
+ */
+ if (BLOCKVECTOR_NBLOCKS (bv) > 3)
+ qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK),
+ BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK,
+ sizeof (struct block *),
+ compare_blocks);
+
+ {
+ register CORE_ADDR high = 0;
+ register int i, j = BLOCKVECTOR_NBLOCKS (bv);
+
+ for (i = FIRST_LOCAL_BLOCK; i < j; i++)
+ if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)))
+ high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i));
+ BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high;
+ }
+
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) =
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK));
+
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
+ BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
+ BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) =
+ BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
+}
+\f
+
+/* Constructor/restructor/destructor procedures */
+
+/* Allocate a new symtab for NAME. Needs an estimate of how many symbols
+ MAXSYMS and linenumbers MAXLINES we'll put in it */
+
+static struct symtab *
+new_symtab (name, maxsyms, maxlines, objfile)
+ char *name;
+ int maxsyms;
+ int maxlines;
+ struct objfile *objfile;
+{
+ struct symtab *s = allocate_symtab (name, objfile);
+
+ LINETABLE (s) = new_linetable (maxlines);
+
+ /* All symtabs must have at least two blocks */
+ BLOCKVECTOR (s) = new_bvect (2);
+ BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK) = new_block (maxsyms);
+ BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) = new_block (maxsyms);
+ BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK)) =
+ BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
+
+ s->free_code = free_linetable;
+
+ return (s);
+}
+
+/* Allocate a new partial_symtab NAME */
+
+static struct partial_symtab *
+new_psymtab (name, objfile)
+ char *name;
+ struct objfile *objfile;
+{
+ struct partial_symtab *psymtab;
+
+ psymtab = allocate_psymtab (name, objfile);
+
+ /* Keep a backpointer to the file's symbols */
+
+ psymtab->read_symtab_private = ((char *)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct symloc)));
+ memset ((PTR) psymtab->read_symtab_private, 0, sizeof (struct symloc));
+ CUR_BFD (psymtab) = cur_bfd;
+ DEBUG_SWAP (psymtab) = debug_swap;
+ DEBUG_INFO (psymtab) = debug_info;
+ PENDING_LIST (psymtab) = pending_list;
+
+ /* The way to turn this into a symtab is to call... */
+ psymtab->read_symtab = mdebug_psymtab_to_symtab;
+ return (psymtab);
+}
+
+
+/* Allocate a linetable array of the given SIZE. Since the struct
+ already includes one item, we subtract one when calculating the
+ proper size to allocate. */
+
+static struct linetable *
+new_linetable (size)
+ int size;
+{
+ struct linetable *l;
+
+ size = (size - 1) * sizeof (l->item) + sizeof (struct linetable);
+ l = (struct linetable *) xmalloc (size);
+ l->nitems = 0;
+ return l;
+}
+
+/* Oops, too big. Shrink it. This was important with the 2.4 linetables,
+ I am not so sure about the 3.4 ones.
+
+ Since the struct linetable already includes one item, we subtract one when
+ calculating the proper size to allocate. */
+
+static struct linetable *
+shrink_linetable (lt)
+ struct linetable *lt;
+{
+
+ return (struct linetable *) xrealloc ((PTR) lt,
+ (sizeof (struct linetable)
+ + ((lt->nitems - 1)
+ * sizeof (lt->item))));
+}
+
+/* Allocate and zero a new blockvector of NBLOCKS blocks. */
+
+static struct blockvector *
+new_bvect (nblocks)
+ int nblocks;
+{
+ struct blockvector *bv;
+ int size;
+
+ size = sizeof (struct blockvector) + nblocks * sizeof (struct block *);
+ bv = (struct blockvector *) xzalloc (size);
+
+ BLOCKVECTOR_NBLOCKS (bv) = nblocks;
+
+ return bv;
+}
+
+/* Allocate and zero a new block of MAXSYMS symbols */
+
+static struct block *
+new_block (maxsyms)
+ int maxsyms;
+{
+ int size = sizeof (struct block) + (maxsyms - 1) * sizeof (struct symbol *);
+
+ return (struct block *) xzalloc (size);
+}
+
+/* Ooops, too big. Shrink block B in symtab S to its minimal size.
+ Shrink_block can also be used by add_symbol to grow a block. */
+
+static struct block *
+shrink_block (b, s)
+ struct block *b;
+ struct symtab *s;
+{
+ struct block *new;
+ struct blockvector *bv = BLOCKVECTOR (s);
+ int i;
+
+ /* Just reallocate it and fix references to the old one */
+
+ new = (struct block *) xrealloc ((PTR) b,
+ (sizeof (struct block)
+ + ((BLOCK_NSYMS (b) - 1)
+ * sizeof (struct symbol *))));
+
+ /* Should chase pointers to old one. Fortunately, that`s just
+ the block`s function and inferior blocks */
+ if (BLOCK_FUNCTION (new) && SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) == b)
+ SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) = new;
+ for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++)
+ if (BLOCKVECTOR_BLOCK (bv, i) == b)
+ BLOCKVECTOR_BLOCK (bv, i) = new;
+ else if (BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) == b)
+ BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) = new;
+ return new;
+}
+
+/* Create a new symbol with printname NAME */
+
+static struct symbol *
+new_symbol (name)
+ char *name;
+{
+ struct symbol *s = ((struct symbol *)
+ obstack_alloc (¤t_objfile->symbol_obstack,
+ sizeof (struct symbol)));
+
+ memset ((PTR) s, 0, sizeof (*s));
+ SYMBOL_NAME (s) = name;
+ SYMBOL_LANGUAGE (s) = psymtab_language;
+ SYMBOL_INIT_DEMANGLED_NAME (s, ¤t_objfile->symbol_obstack);
+ return s;
+}
+
+/* Create a new type with printname NAME */
+
+static struct type *
+new_type (name)
+ char *name;
+{
+ struct type *t;
+
+ t = alloc_type (current_objfile);
+ TYPE_NAME (t) = name;
+ TYPE_CPLUS_SPECIFIC (t) = (struct cplus_struct_type *) &cplus_struct_default;
+ return t;
+}
+\f
+/* Read ECOFF debugging information from a BFD section. This is
+ called from elfread.c. It parses the section into a
+ ecoff_debug_info struct, and then lets the rest of the file handle
+ it as normal. */
+
+void
+elfmdebug_build_psymtabs (objfile, swap, sec, section_offsets)
+ struct objfile *objfile;
+ const struct ecoff_debug_swap *swap;
+ asection *sec;
+ struct section_offsets *section_offsets;
+{
+ bfd *abfd = objfile->obfd;
+ char *buf;
+ struct ecoff_debug_info *info;
+
+ buf = alloca (swap->external_hdr_size);
+ if (bfd_get_section_contents (abfd, sec, buf, (file_ptr) 0,
+ swap->external_hdr_size) == false)
+ perror_with_name (bfd_get_filename (abfd));
+
+ info = ((struct ecoff_debug_info *)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct ecoff_debug_info)));
+
+ (*swap->swap_hdr_in) (abfd, buf, &info->symbolic_header);
+
+ /* The offsets in symbolic_header are file offsets, not section
+ offsets. Strangely, on Irix 5 the information is not entirely
+ within the .mdebug section. There are parts of an executable
+ file which are not within any ELF section at all. This means
+ that we must read the information using bfd_read. */
+
+#define READ(ptr, count, off, size, type) \
+ do \
+ { \
+ if (info->symbolic_header.count == 0) \
+ info->ptr = (type) NULL; \
+ else \
+ { \
+ info->ptr = ((type) \
+ obstack_alloc (&objfile->psymbol_obstack, \
+ (info->symbolic_header.count \
+ * size))); \
+ if (bfd_seek (abfd, info->symbolic_header.off, SEEK_SET) < 0 \
+ || (bfd_read ((PTR) info->ptr, size, \
+ info->symbolic_header.count, abfd) \
+ != info->symbolic_header.count * size)) \
+ perror_with_name (bfd_get_filename (abfd)); \
+ } \
+ } \
+ while (0)
+
+ READ (line, cbLine, cbLineOffset, sizeof (unsigned char), unsigned char *);
+ READ (external_dnr, idnMax, cbDnOffset, swap->external_dnr_size, PTR);
+ READ (external_pdr, ipdMax, cbPdOffset, swap->external_pdr_size, PTR);
+ READ (external_sym, isymMax, cbSymOffset, swap->external_sym_size, PTR);
+ READ (external_opt, ioptMax, cbOptOffset, swap->external_opt_size, PTR);
+ READ (external_aux, iauxMax, cbAuxOffset, sizeof (union aux_ext),
+ union aux_ext *);
+ READ (ss, issMax, cbSsOffset, sizeof (char), char *);
+ READ (ssext, issExtMax, cbSsExtOffset, sizeof (char), char *);
+ READ (external_fdr, ifdMax, cbFdOffset, swap->external_fdr_size, PTR);
+ READ (external_rfd, crfd, cbRfdOffset, swap->external_rfd_size, PTR);
+ READ (external_ext, iextMax, cbExtOffset, swap->external_ext_size, PTR);
+
+#undef READ
+
+ info->fdr = NULL;
+
+ mdebug_build_psymtabs (objfile, swap, info, section_offsets);
+}
+\f
+
+/* Things used for calling functions in the inferior.
+ These functions are exported to our companion
+ mips-tdep.c file and are here because they play
+ with the symbol-table explicitly. */
+
+/* Sigtramp: make sure we have all the necessary information
+ about the signal trampoline code. Since the official code
+ from MIPS does not do so, we make up that information ourselves.
+ If they fix the library (unlikely) this code will neutralize itself. */
+
+/* FIXME: This function is called only by mips-tdep.c. It needs to be
+ here because it calls functions defined in this file, but perhaps
+ this could be handled in a better way. */
+
+void
+fixup_sigtramp ()
+{
+ struct symbol *s;
+ struct symtab *st;
+ struct block *b, *b0 = NULL;
+
+ sigtramp_address = -1;
+
+ /* We have to handle the following cases here:
+ a) The Mips library has a sigtramp label within sigvec.
+ b) Irix has a _sigtramp which we want to use, but it also has sigvec. */
+ s = lookup_symbol ("sigvec", 0, VAR_NAMESPACE, 0, NULL);
+ if (s != 0)
+ {
+ b0 = SYMBOL_BLOCK_VALUE (s);
+ s = lookup_symbol ("sigtramp", b0, VAR_NAMESPACE, 0, NULL);
+ }
+ if (s == 0)
+ {
+ /* No sigvec or no sigtramp inside sigvec, try _sigtramp. */
+ s = lookup_symbol ("_sigtramp", 0, VAR_NAMESPACE, 0, NULL);
+ }
+
+ /* But maybe this program uses its own version of sigvec */
+ if (s == 0)
+ return;
+
+ /* Did we or MIPSco fix the library ? */
+ if (SYMBOL_CLASS (s) == LOC_BLOCK)
+ {
+ sigtramp_address = BLOCK_START (SYMBOL_BLOCK_VALUE (s));
+ sigtramp_end = BLOCK_END (SYMBOL_BLOCK_VALUE (s));
+ return;
+ }
+
+ sigtramp_address = SYMBOL_VALUE (s);
+ sigtramp_end = sigtramp_address + 0x88; /* black magic */
+
+ /* But what symtab does it live in ? */
+ st = find_pc_symtab (SYMBOL_VALUE (s));
+
+ /*
+ * Ok, there goes the fix: turn it into a procedure, with all the
+ * needed info. Note we make it a nested procedure of sigvec,
+ * which is the way the (assembly) code is actually written.
+ */
+ SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_BLOCK;
+ SYMBOL_TYPE (s) = init_type (TYPE_CODE_FUNC, 4, 0, (char *) NULL,
+ st->objfile);
+ TYPE_TARGET_TYPE (SYMBOL_TYPE (s)) = builtin_type_void;
+
+ /* Need a block to allocate MIPS_EFI_SYMBOL_NAME in */
+ b = new_block (1);
+ SYMBOL_BLOCK_VALUE (s) = b;
+ BLOCK_START (b) = sigtramp_address;
+ BLOCK_END (b) = sigtramp_end;
+ BLOCK_FUNCTION (b) = s;
+ BLOCK_SUPERBLOCK (b) = BLOCK_SUPERBLOCK (b0);
+ add_block (b, st);
+ sort_blocks (st);
+
+ /* Make a MIPS_EFI_SYMBOL_NAME entry for it */
+ {
+ struct mips_extra_func_info *e =
+ ((struct mips_extra_func_info *)
+ xzalloc (sizeof (struct mips_extra_func_info)));
+
+ e->numargs = 0; /* the kernel thinks otherwise */
+ /* align_longword(sigcontext + SIGFRAME) */
+ e->pdr.frameoffset = 0x150;
+ e->pdr.framereg = SP_REGNUM;
+ /* read_next_frame_reg provides the true pc at the time of signal */
+ e->pdr.pcreg = PC_REGNUM;
+ e->pdr.regmask = -2;
+ e->pdr.regoffset = -(41 * sizeof (int));
+ e->pdr.fregmask = -1;
+ e->pdr.fregoffset = -(7 * sizeof (int));
+ e->pdr.isym = (long) s;
+ e->pdr.adr = sigtramp_address;
+
+ current_objfile = st->objfile; /* Keep new_symbol happy */
+ s = new_symbol (MIPS_EFI_SYMBOL_NAME);
+ SYMBOL_VALUE (s) = (long) e;
+ SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE;
+ SYMBOL_CLASS (s) = LOC_CONST;
+ SYMBOL_TYPE (s) = builtin_type_void;
+ current_objfile = NULL;
+ }
+
+ BLOCK_SYM (b, BLOCK_NSYMS (b)++) = s;
+}
+
+void
+_initialize_mdebugread ()
+{
+ /* Missing basic types */
+
+ builtin_type_string =
+ init_type (TYPE_CODE_STRING,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ 0, "string",
+ (struct objfile *) NULL);
+ builtin_type_complex =
+ init_type (TYPE_CODE_FLT,
+ TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
+ 0, "complex",
+ (struct objfile *) NULL);
+ builtin_type_double_complex =
+ init_type (TYPE_CODE_FLT,
+ TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
+ 0, "double complex",
+ (struct objfile *) NULL);
+ builtin_type_fixed_dec =
+ init_type (TYPE_CODE_INT,
+ TARGET_INT_BIT / TARGET_CHAR_BIT,
+ 0, "fixed decimal",
+ (struct objfile *) NULL);
+ builtin_type_float_dec =
+ init_type (TYPE_CODE_FLT,
+ TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "floating decimal",
+ (struct objfile *) NULL);
+}
projects / thirdparty / binutils-gdb.git / commitdiff
