diff options
Diffstat (limited to 'gdb/i386nbsd-tdep.c')
| -rw-r--r-- | gdb/i386nbsd-tdep.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/gdb/i386nbsd-tdep.c b/gdb/i386nbsd-tdep.c deleted file mode 100644 index 8d32a03..0000000 --- a/gdb/i386nbsd-tdep.c +++ /dev/null @@ -1,302 +0,0 @@ -/* Target-dependent code for NetBSD/i386, for GDB. - Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002 - Free Software Foundation, 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 - (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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "gdbtypes.h" -#include "gdbcore.h" -#include "regcache.h" -#include "arch-utils.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[] = -{ - ( 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 */ -}; - -#define SIZEOF_STRUCT_REG (16 * 4) - -static void -i386nbsd_supply_reg (char *regs, int regno) -{ - int i; - - for (i = 0; i <= 15; i++) - if (regno == i || regno == -1) - supply_register (i, regs + regmap[i]); -} - -static void -fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, - CORE_ADDR ignore) -{ - char *regs, *fsave; - - /* We get everything from one section. */ - if (which != 0) - return; - - if (core_reg_size < (SIZEOF_STRUCT_REG + 108)) - { - warning ("Wrong size register set in core file."); - return; - } - - 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; - } -} - -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 - following code sequence: - - leal 0x10(%esp), %eax - pushl %eax - pushl %eax - movl $0x127, %eax # __sigreturn14 - int $0x80 - - Each instruction has a unique encoding, so we simply attempt to match - the instruction the PC is pointing to with any of the above instructions. - If there is a hit, we know the offset to the start of the designated - sequence and can then check whether we really are executing in the - signal trampoline. If not, -1 is returned, otherwise the offset from the - start of the return sequence is returned. */ -#define RETCODE_INSN1 0x8d -#define RETCODE_INSN2 0x50 -#define RETCODE_INSN3 0x50 -#define RETCODE_INSN4 0xb8 -#define RETCODE_INSN5 0xcd - -#define RETCODE_INSN2_OFF 4 -#define RETCODE_INSN3_OFF 5 -#define RETCODE_INSN4_OFF 6 -#define RETCODE_INSN5_OFF 11 - -static const unsigned char sigtramp_retcode[] = -{ - RETCODE_INSN1, 0x44, 0x24, 0x10, - RETCODE_INSN2, - RETCODE_INSN3, - RETCODE_INSN4, 0x27, 0x01, 0x00, 0x00, - RETCODE_INSN5, 0x80, -}; - -static LONGEST -i386nbsd_sigtramp_offset (CORE_ADDR pc) -{ - unsigned char ret[sizeof(sigtramp_retcode)], insn; - LONGEST off; - int i; - - if (read_memory_nobpt (pc, &insn, 1) != 0) - return -1; - - switch (insn) - { - case RETCODE_INSN1: - off = 0; - break; - - 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) - return -1; - - if (insn == RETCODE_INSN3) - off = RETCODE_INSN2_OFF; - else - off = RETCODE_INSN3_OFF; - break; - - case RETCODE_INSN4: - off = RETCODE_INSN4_OFF; - break; - - case RETCODE_INSN5: - off = RETCODE_INSN5_OFF; - break; - - default: - return -1; - } - - pc -= off; - - if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0) - return -1; - - if (memcmp (ret, sigtramp_retcode, sizeof (ret)) == 0) - return off; - - return -1; -} - -static int -i386nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) -{ - - return (nbsd_pc_in_sigtramp (pc, name) - || i386nbsd_sigtramp_offset (pc) >= 0); -} - -/* From <machine/signal.h>. */ -int i386nbsd_sc_pc_offset = 44; -int i386nbsd_sc_sp_offset = 56; - -static void -i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* Obviously NetBSD is BSD-based. */ - i386bsd_init_abi (info, gdbarch); - - /* NetBSD has different signal trampoline conventions. */ - set_gdbarch_pc_in_sigtramp (gdbarch, i386nbsd_pc_in_sigtramp); - - /* 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; -} - -/* NetBSD ELF. */ -static void -i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* It's still NetBSD. */ - i386nbsd_init_abi (info, gdbarch); - - /* But ELF-based. */ - 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); - - /* 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, - i386nbsdelf_init_abi); -} |