-/* Target-dependent code for MIPS systems running NetBSD.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/mips.
+
+ Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, Inc.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "regcache.h"
+#include "regset.h"
#include "target.h"
#include "value.h"
#include "osabi.h"
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
#include "nbsd-tdep.h"
#include "mipsnbsd-tdep.h"
+#include "mips-tdep.h"
#include "solib-svr4.h"
-/* Conveniently, GDB uses the same register numbering as the
- ptrace register structure used by NetBSD/mips. */
+/* Shorthand for some register numbers used below. */
+#define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM
+#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
+#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
-void
-mipsnbsd_supply_reg (char *regs, int regno)
+/* Core file support. */
+
+/* Number of registers in `struct reg' from <machine/reg.h>. */
+#define MIPSNBSD_NUM_GREGS 38
+
+/* Number of registers in `struct fpreg' from <machine/reg.h>. */
+#define MIPSNBSD_NUM_FPREGS 33
+
+/* Supply register REGNUM from the buffer specified by FPREGS and LEN
+ in the floating-point register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+mipsnbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
{
+ size_t regsize = mips_isa_regsize (get_regcache_arch (regcache));
+ const char *regs = fpregs;
int i;
- for (i = 0; i <= PC_REGNUM; i++)
+ gdb_assert (len >= MIPSNBSD_NUM_FPREGS * regsize);
+
+ for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
{
- if (regno == i || regno == -1)
- {
- if (CANNOT_FETCH_REGISTER (i))
- supply_register (i, NULL);
- else
- supply_register (i, regs + (i * mips_regsize (current_gdbarch)));
- }
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i,
+ regs + (i - MIPS_FP0_REGNUM) * regsize);
}
}
-void
-mipsnbsd_fill_reg (char *regs, int regno)
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+mipsnbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *gregs, size_t len)
{
+ size_t regsize = mips_isa_regsize (get_regcache_arch (regcache));
+ const char *regs = gregs;
int i;
- for (i = 0; i <= PC_REGNUM; i++)
- if ((regno == i || regno == -1) && ! CANNOT_STORE_REGISTER (i))
- regcache_collect (i, regs + (i * mips_regsize (current_gdbarch)));
+ gdb_assert (len >= MIPSNBSD_NUM_GREGS * regsize);
+
+ for (i = 0; i <= MIPS_PC_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * regsize);
+ }
+
+ if (len >= (MIPSNBSD_NUM_GREGS + MIPSNBSD_NUM_FPREGS) * regsize)
+ {
+ regs += MIPSNBSD_NUM_GREGS * regsize;
+ len -= MIPSNBSD_NUM_GREGS * regsize;
+ mipsnbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+ }
}
+/* NetBSD/mips register sets. */
+
+static struct regset mipsnbsd_gregset =
+{
+ NULL,
+ mipsnbsd_supply_gregset
+};
+
+static struct regset mipsnbsd_fpregset =
+{
+ NULL,
+ mipsnbsd_supply_fpregset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+mipsnbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ size_t regsize = mips_isa_regsize (gdbarch);
+
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= MIPSNBSD_NUM_GREGS * regsize)
+ return &mipsnbsd_gregset;
+
+ if (strcmp (sect_name, ".reg2") == 0
+ && sect_size >= MIPSNBSD_NUM_FPREGS * regsize)
+ return &mipsnbsd_fpregset;
+
+ return NULL;
+}
+\f
+
+/* Conveniently, GDB uses the same register numbering as the
+ ptrace register structure used by NetBSD/mips. */
+
void
-mipsnbsd_supply_fpreg (char *fpregs, int regno)
+mipsnbsd_supply_reg (struct regcache *regcache, const char *regs, int regno)
{
int i;
- for (i = FP0_REGNUM; i <= FCRIR_REGNUM; i++)
+ for (i = 0; i <= gdbarch_pc_regnum (current_gdbarch); i++)
{
if (regno == i || regno == -1)
{
- if (CANNOT_FETCH_REGISTER (i))
- supply_register (i, NULL);
+ if (gdbarch_cannot_fetch_register (current_gdbarch, i))
+ regcache_raw_supply (regcache, i, NULL);
else
- supply_register (i, fpregs + ((i - FP0_REGNUM) * mips_regsize (current_gdbarch)));
- }
+ regcache_raw_supply (regcache, i,
+ regs + (i * mips_isa_regsize (current_gdbarch)));
+ }
}
}
void
-mipsnbsd_fill_fpreg (char *fpregs, int regno)
+mipsnbsd_fill_reg (const struct regcache *regcache, char *regs, int regno)
{
int i;
- for (i = FP0_REGNUM; i <= FCRCS_REGNUM; i++)
- if ((regno == i || regno == -1) && ! CANNOT_STORE_REGISTER (i))
- regcache_collect (i, fpregs + ((i - FP0_REGNUM) * mips_regsize (current_gdbarch)));
+ for (i = 0; i <= gdbarch_pc_regnum (current_gdbarch); i++)
+ if ((regno == i || regno == -1)
+ && ! gdbarch_cannot_store_register (current_gdbarch, i))
+ regcache_raw_collect (regcache, i,
+ regs + (i * mips_isa_regsize (current_gdbarch)));
}
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+void
+mipsnbsd_supply_fpreg (struct regcache *regcache, const char *fpregs, int regno)
{
- char *regs, *fpregs;
-
- /* We get everything from one section. */
- if (which != 0)
- return;
-
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
-
- /* Integer registers. */
- mipsnbsd_supply_reg (regs, -1);
-
- /* Floating point registers. */
- mipsnbsd_supply_fpreg (fpregs, -1);
-}
+ int i;
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- switch (which)
+ for (i = gdbarch_fp0_regnum (current_gdbarch);
+ i <= mips_regnum (current_gdbarch)->fp_implementation_revision;
+ i++)
{
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- mipsnbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != SIZEOF_STRUCT_FPREG)
- warning ("Wrong size register set in core file.");
- else
- mipsnbsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
+ if (regno == i || regno == -1)
+ {
+ if (gdbarch_cannot_fetch_register (current_gdbarch, i))
+ regcache_raw_supply (regcache, i, NULL);
+ else
+ regcache_raw_supply (regcache, i,
+ fpregs
+ + ((i - gdbarch_fp0_regnum (current_gdbarch))
+ * mips_isa_regsize (current_gdbarch)));
+ }
}
}
-static struct core_fns mipsnbsd_core_fns =
+void
+mipsnbsd_fill_fpreg (const struct regcache *regcache, char *fpregs, int regno)
{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
+ int i;
-static struct core_fns mipsnbsd_elfcore_fns =
-{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
-};
+ for (i = gdbarch_fp0_regnum (current_gdbarch);
+ i <= mips_regnum (current_gdbarch)->fp_control_status;
+ i++)
+ if ((regno == i || regno == -1)
+ && ! gdbarch_cannot_store_register (current_gdbarch, i))
+ regcache_raw_collect (regcache, i,
+ fpregs + ((i - gdbarch_fp0_regnum
+ (current_gdbarch))
+ * mips_isa_regsize (current_gdbarch)));
+}
/* Under NetBSD/mips, signal handler invocations can be identified by the
designated code sequence that is used to return from a signal handler.
};
static LONGEST
-mipsnbsd_sigtramp_offset (CORE_ADDR pc)
+mipsnbsd_sigtramp_offset (struct frame_info *next_frame)
{
- const char *retcode = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
- ? sigtramp_retcode_mipseb : sigtramp_retcode_mipsel;
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ const char *retcode = gdbarch_byte_order (current_gdbarch)
+ == BFD_ENDIAN_BIG ? sigtramp_retcode_mipseb :
+ sigtramp_retcode_mipsel;
unsigned char ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (read_memory_nobpt (pc, (char *) w, sizeof (w)) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, w, sizeof (w)))
return -1;
for (i = 0; i < RETCODE_NWORDS; i++)
off = i * 4;
pc -= off;
- if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, ret, sizeof (ret)))
return -1;
if (memcmp (ret, retcode, RETCODE_SIZE) == 0)
return -1;
}
-static int
-mipsnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
-{
- return (nbsd_pc_in_sigtramp (pc, func_name)
- || mipsnbsd_sigtramp_offset (pc) >= 0);
-}
-
/* Figure out where the longjmp will land. We expect that we have
- just entered longjmp and haven't yet setup the stack frame, so
- the args are still in the argument regs. A0_REGNUM points at the
+ just entered longjmp and haven't yet setup the stack frame, so the
+ args are still in the argument regs. MIPS_A0_REGNUM points at the
jmp_buf structure from which we extract the PC that we will land
at. The PC is copied into *pc. This routine returns true on
success. */
#define NBSD_MIPS_JB_PC (2 * 4)
-#define NBSD_MIPS_JB_ELEMENT_SIZE mips_regsize (current_gdbarch)
+#define NBSD_MIPS_JB_ELEMENT_SIZE mips_isa_regsize (current_gdbarch)
#define NBSD_MIPS_JB_OFFSET (NBSD_MIPS_JB_PC * \
NBSD_MIPS_JB_ELEMENT_SIZE)
static int
-mipsnbsd_get_longjmp_target (CORE_ADDR *pc)
+mipsnbsd_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
char *buf;
buf = alloca (NBSD_MIPS_JB_ELEMENT_SIZE);
- jb_addr = read_register (A0_REGNUM);
+ jb_addr = get_frame_register_unsigned (frame, MIPS_A0_REGNUM);
if (target_read_memory (jb_addr + NBSD_MIPS_JB_OFFSET, buf,
NBSD_MIPS_JB_ELEMENT_SIZE))
static int
mipsnbsd_cannot_fetch_register (int regno)
{
- return (regno == ZERO_REGNUM
- || regno == FCRIR_REGNUM);
+ return (regno == MIPS_ZERO_REGNUM
+ || regno == mips_regnum (current_gdbarch)->fp_implementation_revision);
}
static int
mipsnbsd_cannot_store_register (int regno)
{
- return (regno == ZERO_REGNUM
- || regno == FCRIR_REGNUM);
+ return (regno == MIPS_ZERO_REGNUM
+ || regno == mips_regnum (current_gdbarch)->fp_implementation_revision);
}
-/* NetBSD/mips uses a slightly different link_map structure from the
+/* Shared library support. */
+
+/* NetBSD/mips uses a slightly different `struct link_map' than the
other NetBSD platforms. */
+
static struct link_map_offsets *
-mipsnbsd_ilp32_solib_svr4_fetch_link_map_offsets (void)
+mipsnbsd_ilp32_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
{
lmp = &lmo;
- lmo.r_debug_size = 16;
-
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
lmo.r_map_offset = 4;
- lmo.r_map_size = 4;
+ lmo.r_ldsomap_offset = -1;
+ /* Everything we need is in the first 24 bytes. */
lmo.link_map_size = 24;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
-
+ lmo.l_addr_offset = 4;
lmo.l_name_offset = 8;
- lmo.l_name_size = 4;
-
+ lmo.l_ld_offset = 12;
lmo.l_next_offset = 16;
- lmo.l_next_size = 4;
-
lmo.l_prev_offset = 20;
- lmo.l_prev_size = 4;
}
return lmp;
}
static struct link_map_offsets *
-mipsnbsd_lp64_solib_svr4_fetch_link_map_offsets (void)
+mipsnbsd_lp64_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
{
lmp = &lmo;
- lmo.r_debug_size = 32;
-
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
+ lmo.r_map_offset = 8;
+ lmo.r_ldsomap_offset = -1;
+ /* Everything we need is in the first 40 bytes. */
lmo.link_map_size = 48;
-
lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
-
lmo.l_name_offset = 16;
- lmo.l_name_size = 8;
-
+ lmo.l_ld_offset = 24;
lmo.l_next_offset = 32;
- lmo.l_next_size = 8;
-
lmo.l_prev_offset = 40;
- lmo.l_prev_size = 8;
}
return lmp;
}
+\f
static void
mipsnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
- set_gdbarch_pc_in_sigtramp (gdbarch, mipsnbsd_pc_in_sigtramp);
+ set_gdbarch_regset_from_core_section
+ (gdbarch, mipsnbsd_regset_from_core_section);
set_gdbarch_get_longjmp_target (gdbarch, mipsnbsd_get_longjmp_target);
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- gdbarch_ptr_bit (gdbarch) == 32 ?
- mipsnbsd_ilp32_solib_svr4_fetch_link_map_offsets :
- mipsnbsd_lp64_solib_svr4_fetch_link_map_offsets);
+ /* NetBSD/mips has SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ?
+ mipsnbsd_ilp32_fetch_link_map_offsets :
+ mipsnbsd_lp64_fetch_link_map_offsets));
+}
+\f
+
+static enum gdb_osabi
+mipsnbsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_ELF;
+
+ return GDB_OSABI_UNKNOWN;
}
void
{
gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_NETBSD_ELF,
mipsnbsd_init_abi);
-
- add_core_fns (&mipsnbsd_core_fns);
- add_core_fns (&mipsnbsd_elfcore_fns);
}
projects / thirdparty / binutils-gdb.git / blobdiff