-/* Target-dependent code for NetBSD/i386, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002
- Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/i386.
+
+ Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003,
+ 2004, 2007 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "gdbtypes.h"
+#include "arch-utils.h"
+#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
-#include "arch-utils.h"
+#include "regset.h"
+#include "osabi.h"
+#include "symtab.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "nbsd-tdep.h"
-
#include "solib-svr4.h"
-/* Map a GDB register number to an offset in the reg structure. */
-static int regmap[] =
+/* From <machine/reg.h>. */
+static int i386nbsd_r_reg_offset[] =
{
- ( 0 * 4), /* %eax */
- ( 1 * 4), /* %ecx */
- ( 2 * 4), /* %edx */
- ( 3 * 4), /* %ebx */
- ( 4 * 4), /* %esp */
- ( 5 * 4), /* %epb */
- ( 6 * 4), /* %esi */
- ( 7 * 4), /* %edi */
- ( 8 * 4), /* %eip */
- ( 9 * 4), /* %eflags */
- (10 * 4), /* %cs */
- (11 * 4), /* %ss */
- (12 * 4), /* %ds */
- (13 * 4), /* %es */
- (14 * 4), /* %fs */
- (15 * 4), /* %gs */
+ 0 * 4, /* %eax */
+ 1 * 4, /* %ecx */
+ 2 * 4, /* %edx */
+ 3 * 4, /* %ebx */
+ 4 * 4, /* %esp */
+ 5 * 4, /* %ebp */
+ 6 * 4, /* %esi */
+ 7 * 4, /* %edi */
+ 8 * 4, /* %eip */
+ 9 * 4, /* %eflags */
+ 10 * 4, /* %cs */
+ 11 * 4, /* %ss */
+ 12 * 4, /* %ds */
+ 13 * 4, /* %es */
+ 14 * 4, /* %fs */
+ 15 * 4 /* %gs */
};
-#define SIZEOF_STRUCT_REG (16 * 4)
-
static void
-i386nbsd_supply_reg (char *regs, int regno)
+i386nbsd_aout_supply_regset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *regs, size_t len)
{
- int i;
+ const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
- for (i = 0; i <= 15; i++)
- if (regno == i || regno == -1)
- supply_register (i, regs + regmap[i]);
+ gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE);
+
+ i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset);
+ i387_supply_fsave (regcache, regnum, (char *) regs + tdep->sizeof_gregset);
}
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+static const struct regset *
+i386nbsd_aout_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name,
+ size_t sect_size)
{
- char *regs, *fsave;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* We get everything from one section. */
- if (which != 0)
- return;
+ /* NetBSD a.out core dumps don't use seperate register sets for the
+ general-purpose and floating-point registers. */
- if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE)
{
- warning ("Wrong size register set in core file.");
- return;
+ if (tdep->gregset == NULL)
+ tdep->gregset =
+ regset_alloc (gdbarch, i386nbsd_aout_supply_regset, NULL);
+ return tdep->gregset;
}
- regs = core_reg_sect;
- fsave = core_reg_sect + SIZEOF_STRUCT_REG;
-
- /* Integer registers. */
- i386nbsd_supply_reg (regs, -1);
-
- /* Floating point registers. */
- i387_supply_fsave (fsave);
-}
-
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR ignore)
-{
- switch (which)
- {
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- i386nbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != 108)
- warning ("Wrong size FP register set in core file.");
- else
- i387_supply_fsave (core_reg_sect);
- break;
-
- case 3: /* "Extended" floating point registers. This is gdb-speak
- for SSE/SSE2. */
- if (core_reg_size != 512)
- warning ("Wrong size XMM register set in core file.");
- else
- i387_supply_fxsave (core_reg_sect);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
+ return NULL;
}
-static struct core_fns i386nbsd_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-static struct core_fns i386nbsd_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 */
-};
-
/* Under NetBSD/i386, signal handler invocations can be identified by the
designated code sequence that is used to return from a signal handler.
In particular, the return address of a signal handler points to the
};
static LONGEST
-i386nbsd_sigtramp_offset (CORE_ADDR pc)
+i386nbsd_sigtramp_offset (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
unsigned char ret[sizeof(sigtramp_retcode)], insn;
LONGEST off;
int i;
- if (read_memory_nobpt (pc, &insn, 1) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, &insn, 1))
return -1;
switch (insn)
case RETCODE_INSN2:
/* INSN2 and INSN3 are the same. Read at the location of PC+1
to determine if we're actually looking at INSN2 or INSN3. */
- if (read_memory_nobpt (pc + 1, &insn, 1) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc + 1, &insn, 1))
return -1;
if (insn == RETCODE_INSN3)
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, sigtramp_retcode, sizeof (ret)) == 0)
return -1;
}
+/* Return whether the frame preceding NEXT_FRAME corresponds to a
+ NetBSD sigtramp routine. */
+
static int
-i386nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+i386nbsd_sigtramp_p (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
return (nbsd_pc_in_sigtramp (pc, name)
- || i386nbsd_sigtramp_offset (pc) >= 0);
+ || i386nbsd_sigtramp_offset (next_frame) >= 0);
}
/* From <machine/signal.h>. */
-int i386nbsd_sc_pc_offset = 44;
-int i386nbsd_sc_sp_offset = 56;
+int i386nbsd_sc_reg_offset[] =
+{
+ 10 * 4, /* %eax */
+ 9 * 4, /* %ecx */
+ 8 * 4, /* %edx */
+ 7 * 4, /* %ebx */
+ 14 * 4, /* %esp */
+ 6 * 4, /* %ebp */
+ 5 * 4, /* %esi */
+ 4 * 4, /* %edi */
+ 11 * 4, /* %eip */
+ 13 * 4, /* %eflags */
+ 12 * 4, /* %cs */
+ 15 * 4, /* %ss */
+ 3 * 4, /* %ds */
+ 2 * 4, /* %es */
+ 1 * 4, /* %fs */
+ 0 * 4 /* %gs */
+};
static void
i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Obviously NetBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
+ /* NetBSD has a different `struct reg'. */
+ tdep->gregset_reg_offset = i386nbsd_r_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (i386nbsd_r_reg_offset);
+ tdep->sizeof_gregset = 16 * 4;
+
/* NetBSD has different signal trampoline conventions. */
- set_gdbarch_pc_in_sigtramp (gdbarch, i386nbsd_pc_in_sigtramp);
- /* FIXME: kettenis/20020906: We should probably provide
- NetBSD-specific versions of these functions if we want to
- recognize signal trampolines that live on the stack. */
- set_gdbarch_sigtramp_start (gdbarch, NULL);
- set_gdbarch_sigtramp_end (gdbarch, NULL);
+ tdep->sigtramp_start = 0;
+ tdep->sigtramp_end = 0;
+ tdep->sigtramp_p = i386nbsd_sigtramp_p;
/* NetBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
/* NetBSD has a `struct sigcontext' that's different from the
- origional 4.3 BSD. */
- tdep->sc_pc_offset = i386nbsd_sc_pc_offset;
- tdep->sc_sp_offset = i386nbsd_sc_sp_offset;
+ original 4.3 BSD. */
+ tdep->sc_reg_offset = i386nbsd_sc_reg_offset;
+ tdep->sc_num_regs = ARRAY_SIZE (i386nbsd_sc_reg_offset);
+}
+
+/* NetBSD a.out. */
+
+static void
+i386nbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ i386nbsd_init_abi (info, gdbarch);
+
+ /* NetBSD a.out has a single register set. */
+ set_gdbarch_regset_from_core_section
+ (gdbarch, i386nbsd_aout_regset_from_core_section);
}
/* NetBSD ELF. */
+
static void
i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386_elf_init_abi (info, gdbarch);
/* NetBSD ELF uses SVR4-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- generic_in_solib_call_trampoline);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
/* NetBSD ELF uses -fpcc-struct-return by default. */
tdep->struct_return = pcc_struct_return;
-
- /* We support the SSE registers on NetBSD ELF. */
- tdep->num_xmm_regs = I386_NUM_XREGS - 1;
- set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS
- + I386_NUM_XREGS);
}
void
_initialize_i386nbsd_tdep (void)
{
- add_core_fns (&i386nbsd_core_fns);
- add_core_fns (&i386nbsd_elfcore_fns);
-
- gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_AOUT,
- i386nbsd_init_abi);
- gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_ELF,
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD_AOUT,
+ i386nbsdaout_init_abi);
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD_ELF,
i386nbsdelf_init_abi);
}
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