2003-07-13 18:15:59 +02:00
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/* Native-dependent code for FreeBSD/amd64.
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2003-08-29 15:58:26 +02:00
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2004-01-10 13:52:41 +01:00
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Copyright 2003, 2004 Free Software Foundation, Inc.
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2003-07-13 18:15:59 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "gdb_assert.h"
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#include <signal.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/sysctl.h>
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#include <machine/reg.h>
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T
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typedef struct fpreg fpregset_t;
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#endif
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#include "gregset.h"
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2004-02-25 21:59:12 +01:00
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#include "amd64-tdep.h"
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2003-08-29 15:58:26 +02:00
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#include "amd64-nat.h"
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2003-07-13 18:15:59 +02:00
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/* Offset to the gregset_t location where REG is stored. */
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#define REG_OFFSET(reg) offsetof (gregset_t, reg)
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2003-08-29 15:58:26 +02:00
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/* At reg_offset[REGNUM] you'll find the offset to the gregset_t
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location where the GDB register REGNUM is stored. Unsupported
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2003-07-13 18:15:59 +02:00
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registers are marked with `-1'. */
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static int reg_offset[] =
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{
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REG_OFFSET (r_rax),
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REG_OFFSET (r_rbx),
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REG_OFFSET (r_rcx),
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REG_OFFSET (r_rdx),
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REG_OFFSET (r_rsi),
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REG_OFFSET (r_rdi),
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REG_OFFSET (r_rbp),
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REG_OFFSET (r_rsp),
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REG_OFFSET (r_r8),
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REG_OFFSET (r_r9),
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REG_OFFSET (r_r10),
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REG_OFFSET (r_r11),
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REG_OFFSET (r_r12),
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REG_OFFSET (r_r13),
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REG_OFFSET (r_r14),
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REG_OFFSET (r_r15),
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REG_OFFSET (r_rip),
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REG_OFFSET (r_rflags),
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2004-01-10 13:52:41 +01:00
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REG_OFFSET (r_cs),
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REG_OFFSET (r_ss),
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2003-07-13 18:15:59 +02:00
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-1,
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-1,
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-1,
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-1
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};
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2003-08-29 15:58:26 +02:00
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/* Mapping between the general-purpose registers in FreeBSD/amd64
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`struct reg' format and GDB's register cache layout for
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FreeBSD/i386.
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2003-07-13 18:15:59 +02:00
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2003-08-29 15:58:26 +02:00
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Note that most FreeBSD/amd64 registers are 64-bit, while the
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FreeBSD/i386 registers are all 32-bit, but since we're
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little-endian we get away with that. */
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2003-07-13 18:15:59 +02:00
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2003-08-29 15:58:26 +02:00
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/* From <machine/reg.h>. */
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static int amd64fbsd32_r_reg_offset[I386_NUM_GREGS] =
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{
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14 * 8, 13 * 8, /* %eax, %ecx */
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12 * 8, 11 * 8, /* %edx, %ebx */
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20 * 8, 10 * 8, /* %esp, %ebp */
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9 * 8, 8 * 8, /* %esi, %edi */
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17 * 8, 19 * 8, /* %eip, %eflags */
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18 * 8, 21 * 8, /* %cs, %ss */
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-1, -1, -1, -1 /* %ds, %es, %fs, %gs */
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};
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2003-07-13 18:15:59 +02:00
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/* Transfering the registers between GDB, inferiors and core files. */
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/* Fill GDB's register array with the general-purpose register values
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in *GREGSETP. */
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void
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supply_gregset (gregset_t *gregsetp)
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{
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2003-08-29 15:58:26 +02:00
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amd64_supply_native_gregset (current_regcache, gregsetp, -1);
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2003-07-13 18:15:59 +02:00
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}
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2003-08-29 15:58:26 +02:00
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/* Fill register REGNUM (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNUM is -1,
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2003-07-13 18:15:59 +02:00
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do this for all registers. */
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void
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2003-08-29 15:58:26 +02:00
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fill_gregset (gregset_t *gregsetp, int regnum)
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2003-07-13 18:15:59 +02:00
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{
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2003-08-29 15:58:26 +02:00
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amd64_collect_native_gregset (current_regcache, gregsetp, regnum);
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2003-07-13 18:15:59 +02:00
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}
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/* Fill GDB's register array with the floating-point register values
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in *FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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* x86-64-tdep.h: Tewak comment.
(enum amd64_regnum): New.
(X86_64_RAX_REGNUM, X86_64_RDX_REGNUM, X86_64_RDI_REGNUM)
(X86_64_RBP_REGNUM, X86_64_RSP_REGNUM, X86_64_RIP_REGNUM)
(X86_64_EFLAGS_REGNUM, X86_64_ST0_REGNUM, X86_64_XMM0_REGNUM)
(X86_64_XMM1_REGNUM): Removed.
(AMD64_NUM_GREGS): Renamed from X86_64_NUM_GREGS.
(amd64_init_abi, amd64_supply_fxsave, amd64_fill_fxsave): Adjust
prototypes for renamed functions.
* x86-64-tdep.c: Fix typo.
(amd64_dwarf_regmap): Use constants from `enum amd64_regnum' for
register numbers.
(amd64_return_value, amd64_push_arguments, amd64_push_dummy_call):
Use constants from `enum amd64_regnum' for register numbers.
(AMD64_NUM_SAVED_REGS): Adjust for renamed macros.
(amd64_analyze_prologue, amd64_frame_cache,
amd64_sigtramp_frame_cache): Use constants from `enum
amd64_regnum' for register numbers.
(amd64_supply_fpregset): Adjust for renamed functions.
(amd64_init_abi): Rename from x86_64_init_abi. Use constants from
`enum amd64_regnum' for register numbers.
(I387_ST0_REGNUM): Use constant from `enum amd64_regnum'.
(amd64_supply_fxsave): Rename from x86_64_supply_fxsave.
(amd64_fill_fxsave): Rename fro x86_64_fill_fxsave.
* x86-64-linux-tdep.c (amd64_linux_supply_gregset)
(amd64_linux_fill_gregset): Adjust for renamed macros.
(fetch_core_registers): Adjust for renamed functions.
(amd64_linux_init_abi): Adjust for renamed functions.
* x86-64-linux-nat.c (supply_gregset, fill_gregset): Adjust for
renamed functions.
* amd64-nat.c: Adjust for renamed macros.
* amd64bsd-nat.c (fetch_inferior_registers)
(store_inferior_registers): Use constants from `enum amd64_regnum'
for register numbers. Adjust for renamed variables.
* amd64fbsd-nat.c (supply_gregset, fill_gregset): Adjust for
renamed variables.
(_initialize_amd64fbsd_nat): Use constants from `enum
amd64_regnum' for register numbers.
* amd64fbsd-tdep.c (amd64fbsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64fbsd_init_abi): Adjust for renamed functions.
* amd64nbsd-tdep.c (amd64nbsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64nbsd_init_abi): Adjust for renamed functions.
(_initialize_amd64nbsd_ndep): Adjust for renamed macros.
* amd64obsd-tdep.c (amd64obsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64obsd_init_abi): Adjust for renamed functions.
(_initialize_amd64obsd_ndep): Adjust for renamed macros.
2004-02-23 22:37:52 +01:00
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amd64_supply_fxsave (current_regcache, -1, fpregsetp);
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2003-07-13 18:15:59 +02:00
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}
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2003-08-29 15:58:26 +02:00
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/* Fill register REGNUM (if it is a floating-point register) in
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*FPREGSETP with the value in GDB's register array. If REGNUM is -1,
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2003-07-13 18:15:59 +02:00
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do this for all registers. */
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void
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2003-08-29 15:58:26 +02:00
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fill_fpregset (fpregset_t *fpregsetp, int regnum)
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2003-07-13 18:15:59 +02:00
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{
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2004-03-04 11:35:57 +01:00
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amd64_collect_fxsave (current_regcache, regnum, fpregsetp);
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2003-07-13 18:15:59 +02:00
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_amd64fbsd_nat (void);
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void
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2003-09-15 21:30:50 +02:00
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_initialize_amd64fbsd_nat (void)
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2003-07-13 18:15:59 +02:00
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{
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int offset;
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2003-08-29 15:58:26 +02:00
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amd64_native_gregset32_reg_offset = amd64fbsd32_r_reg_offset;
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amd64_native_gregset64_reg_offset = reg_offset;
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2003-07-13 18:15:59 +02:00
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/* To support the recognition of signal handlers, i386bsd-tdep.c
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hardcodes some constants. Inclusion of this file means that we
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are compiling a native debugger, which means that we can use the
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system header files and sysctl(3) to get at the relevant
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information. */
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#define SC_REG_OFFSET amd64fbsd_sc_reg_offset
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/* We only check the program counter, stack pointer and frame
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pointer since these members of `struct sigcontext' are essential
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for providing backtraces. */
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* x86-64-tdep.h: Tewak comment.
(enum amd64_regnum): New.
(X86_64_RAX_REGNUM, X86_64_RDX_REGNUM, X86_64_RDI_REGNUM)
(X86_64_RBP_REGNUM, X86_64_RSP_REGNUM, X86_64_RIP_REGNUM)
(X86_64_EFLAGS_REGNUM, X86_64_ST0_REGNUM, X86_64_XMM0_REGNUM)
(X86_64_XMM1_REGNUM): Removed.
(AMD64_NUM_GREGS): Renamed from X86_64_NUM_GREGS.
(amd64_init_abi, amd64_supply_fxsave, amd64_fill_fxsave): Adjust
prototypes for renamed functions.
* x86-64-tdep.c: Fix typo.
(amd64_dwarf_regmap): Use constants from `enum amd64_regnum' for
register numbers.
(amd64_return_value, amd64_push_arguments, amd64_push_dummy_call):
Use constants from `enum amd64_regnum' for register numbers.
(AMD64_NUM_SAVED_REGS): Adjust for renamed macros.
(amd64_analyze_prologue, amd64_frame_cache,
amd64_sigtramp_frame_cache): Use constants from `enum
amd64_regnum' for register numbers.
(amd64_supply_fpregset): Adjust for renamed functions.
(amd64_init_abi): Rename from x86_64_init_abi. Use constants from
`enum amd64_regnum' for register numbers.
(I387_ST0_REGNUM): Use constant from `enum amd64_regnum'.
(amd64_supply_fxsave): Rename from x86_64_supply_fxsave.
(amd64_fill_fxsave): Rename fro x86_64_fill_fxsave.
* x86-64-linux-tdep.c (amd64_linux_supply_gregset)
(amd64_linux_fill_gregset): Adjust for renamed macros.
(fetch_core_registers): Adjust for renamed functions.
(amd64_linux_init_abi): Adjust for renamed functions.
* x86-64-linux-nat.c (supply_gregset, fill_gregset): Adjust for
renamed functions.
* amd64-nat.c: Adjust for renamed macros.
* amd64bsd-nat.c (fetch_inferior_registers)
(store_inferior_registers): Use constants from `enum amd64_regnum'
for register numbers. Adjust for renamed variables.
* amd64fbsd-nat.c (supply_gregset, fill_gregset): Adjust for
renamed variables.
(_initialize_amd64fbsd_nat): Use constants from `enum
amd64_regnum' for register numbers.
* amd64fbsd-tdep.c (amd64fbsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64fbsd_init_abi): Adjust for renamed functions.
* amd64nbsd-tdep.c (amd64nbsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64nbsd_init_abi): Adjust for renamed functions.
(_initialize_amd64nbsd_ndep): Adjust for renamed macros.
* amd64obsd-tdep.c (amd64obsd_sigcontext_addr): Use constants from
`enum amd64_regnum' for register numbers.
(amd64obsd_init_abi): Adjust for renamed functions.
(_initialize_amd64obsd_ndep): Adjust for renamed macros.
2004-02-23 22:37:52 +01:00
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#define SC_RIP_OFFSET SC_REG_OFFSET[AMD64_RIP_REGNUM]
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#define SC_RSP_OFFSET SC_REG_OFFSET[AMD64_RSP_REGNUM]
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#define SC_RBP_OFFSET SC_REG_OFFSET[AMD64_RBP_REGNUM]
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2003-07-13 18:15:59 +02:00
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/* Override the default value for the offset of the program counter
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in the sigcontext structure. */
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offset = offsetof (struct sigcontext, sc_rip);
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if (SC_RIP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rip) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RIP_OFFSET);
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}
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SC_RIP_OFFSET = offset;
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/* Likewise for the stack pointer. */
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offset = offsetof (struct sigcontext, sc_rsp);
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if (SC_RSP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rsp) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RSP_OFFSET);
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}
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SC_RSP_OFFSET = offset;
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/* And the frame pointer. */
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offset = offsetof (struct sigcontext, sc_rbp);
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if (SC_RBP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rbp) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RBP_OFFSET);
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}
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SC_RBP_OFFSET = offset;
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/* FreeBSD provides a kern.ps_strings sysctl that we can use to
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locate the sigtramp. That way we can still recognize a sigtramp
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if its location is changed in a new kernel. Of course this is
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still based on the assumption that the sigtramp is placed
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directly under the location where the program arguments and
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environment can be found. */
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{
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int mib[2];
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2003-09-15 22:05:17 +02:00
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long ps_strings;
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2003-07-13 18:15:59 +02:00
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size_t len;
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mib[0] = CTL_KERN;
|
|
|
|
|
mib[1] = KERN_PS_STRINGS;
|
|
|
|
|
len = sizeof (ps_strings);
|
|
|
|
|
if (sysctl (mib, 2, &ps_strings, &len, NULL, 0) == 0)
|
|
|
|
|
{
|
2004-02-22 20:14:55 +01:00
|
|
|
|
amd64fbsd_sigtramp_start_addr = ps_strings - 32;
|
|
|
|
|
amd64fbsd_sigtramp_end_addr = ps_strings;
|
2003-07-13 18:15:59 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|