binutils-gdb/gdb/i386fbsd-tdep.c

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/* Target-dependent code for FreeBSD/i386.
Copyright (C) 2003-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "arch-utils.h"
#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
Add support for the x86 XSAVE extended state on FreeBSD/x86. Recognize NT_X86_XSTATE notes in FreeBSD process cores. Recent FreeBSD versions include a note containing the XSAVE state for each thread in the process when XSAVE is in use. The note stores a copy of the current XSAVE mask in a reserved section of the machine-defined XSAVE state at the same offset as Linux's NT_X86_XSTATE note. For native processes, use the PT_GETXSTATE_INFO ptrace request to determine if XSAVE is enabled, and if so the active XSAVE state mask (that is, the value of %xcr0 for the target process) as well as the size of XSAVE state area. Use the PT_GETXSTATE and PT_SETXSTATE requests to fetch and store the XSAVE state, respectively, in the BSD x86 native targets. In addition, the FreeBSD amd64 and i386 native targets now include "read_description" target methods to determine the correct x86 target description for the current XSAVE mask. On FreeBSD amd64 this also properly returns an i386 target description for 32-bit binaries which allows the 64-bit GDB to run 32-bit binaries. Note that the ptrace changes are in the BSD native targets, not the FreeBSD-specific native targets since that is where the other ptrace register accesses occur. Of the other BSDs, NetBSD and DragonFly use XSAVE in the kernel but do not currently export the extended state via ptrace(2). OpenBSD does not currently support XSAVE. bfd/ChangeLog: * elf.c (elfcore_grok_note): Recognize NT_X86_XSTATE on FreeBSD. (elfcore_write_xstatereg): Use correct note name on FreeBSD. gdb/ChangeLog: * amd64-tdep.c (amd64_target_description): New function. * amd64-tdep.h: Export amd64_target_description and tdesc_amd64. * amd64bsd-nat.c [PT_GETXSTATE_INFO]: New variable amd64bsd_xsave_len. (amd64bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (amd64bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * amd64bsd-nat.h: Export amd64bsd_xsave_len. * amd64fbsd-nat.c (amd64fbsd_read_description): New function. (_initialize_amd64fbsd_nat): Set "to_read_description" to "amd64fbsd_read_description". * amd64fbsd-tdep.c (amd64fbsd_core_read_description): New function. (amd64fbsd_supply_xstateregset): New function. (amd64fbsd_collect_xstateregset): New function. Add "amd64fbsd_xstateregset". (amd64fbsd_iterate_over_regset_sections): New function. (amd64fbsd_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386-tdep.c (i386_target_description): New function. * i386-tdep.h: Export i386_target_description and tdesc_i386. * i386bsd-nat.c [PT_GETXSTATE_INFO]: New variable i386bsd_xsave_len. (i386bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (i386bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * i386bsd-nat.h: Export i386bsd_xsave_len. * i386fbsd-nat.c (i386fbsd_read_description): New function. (_initialize_i386fbsd_nat): Set "to_read_description" to "i386fbsd_read_description". * i386fbsd-tdep.c (i386fbsd_core_read_xcr0): New function. (i386fbsd_core_read_description): New function. (i386fbsd_supply_xstateregset): New function. (i386fbsd_collect_xstateregset): New function. Add "i386fbsd_xstateregset". (i386fbsd_iterate_over_regset_sections): New function. (i386fbsd4_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386fbsd-tdep.h: New file.
2015-02-21 22:43:30 +01:00
#include "regset.h"
#include "i386fbsd-tdep.h"
#include "x86-xstate.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "bsd-uthread.h"
#include "fbsd-tdep.h"
* amd64fbsd-tdep.c: Include "solib-svr4.h". (amd64fbsd_init_abi): Set link map offsets. * amd64nbsd-tdep.c: Include "slib-svr4.h". (amd64nbsd_init_abi): Set link map offsets. * amd64obsd-tdep.c: Include "solib-svr4.h". (amd64obsd_init_abi): Set link map offsets. * i386fbsd-tdep.c: Include "solib-svr4.h". (i386fbsd_init_abi): Set link map offsets. * i386nbsd-tdep.c: Include "solib-svr4.h". (i386nbsdelf_init_abi): Set link map offsets. * Makefile.in (amd64fbsd-tdep.o, amd64nbsd-tdep.o) (amd64obsd-tdep.o, i386fbsd-tdep.o): Update dependencies. * config/i386/fbsd.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and core-aout.o. Reformat. * config/i386/fbsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o. Reformat. * config/i386/nbsdaout.mh (NATDEPFILES): Add solib.o. Reformat. * config/i386/nbsdelf.mh: Reformat. * config/i386/nbsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and corelow.o. * config/i386/obsd.mh, config/i386/obsdaout.mh: Reformat. * config/i386/obsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and corelow.o. Reformat. * config/i386/fbsd.mt (TDEPFILES): Add solib.o, solib-svr4.o. * config/i386/fbsd64.mt (TDEPFILES): Add solib.o, solib-svr4.o. (TM_FILE): Set to tm-fbsd.h. * config/i386/nbsd.mt (TDEPFILES): Reformat. * config/i386/nbsd64.mt (TDEPFILES): Add corelow.o, solib.o and solib-svr4.o. * config/i386/obsd.mt (TDEPFILES): Add corelow.o, solib.o and solib-svr4.o. (TM_FILE): Set to nm-nbsd.h. * config/i386/nm-fbsd.h: Update copyright year. Tweak comments. Simplify shared library support. Don't include "elf/common.h". (SVR4_SHARED_LIBS): Don't define. * config/i386/nm-fbsd64.h: Update copyright year. Don't include "solib.h". * config/i386/nm-nbsd.h, config/i386/nm-nbsdaout.h, config/i386/nm-obsd.h: Update copyright year. Tweak comments. * config/i386/tm-fbsd.h: Update copyright tear. Tweak comments. Don't include "i386/tm-i386.h". Include "solib.h". * config/i386/tm-nbsd.h: Update copyright year. Tweak comments. Don't include "i386/tm-i386.h". * config/i386/xm-i386.h: Update copyright year. Tweak comments. * config/i386/xm-nbsd.h: Update copyright year. Tweak comments. Include "i386/xm-i386.h". (HOST_LONG_DOUBLE_FORMAT): Remove.
2004-02-22 17:20:22 +01:00
#include "solib-svr4.h"
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
/* Support for signal handlers. */
/* Return whether THIS_FRAME corresponds to a FreeBSD sigtramp
routine. */
/* FreeBSD/i386 supports three different signal trampolines, one for
versions before 4.0, a second for 4.x, and a third for 5.0 and
later. To complicate matters, FreeBSD/i386 binaries running under
an amd64 kernel use a different set of trampolines. These
trampolines differ from the i386 kernel trampolines in that they
omit a middle section that conditionally restores %gs. */
static const gdb_byte i386fbsd_sigtramp_start[] =
{
0x8d, 0x44, 0x24, 0x20, /* lea SIGF_UC(%esp),%eax */
0x50 /* pushl %eax */
};
static const gdb_byte i386fbsd_sigtramp_middle[] =
{
0xf7, 0x40, 0x54, 0x00, 0x00, 0x02, 0x00,
/* testl $PSL_VM,UC_EFLAGS(%eax) */
0x75, 0x03, /* jne +3 */
0x8e, 0x68, 0x14 /* mov UC_GS(%eax),%gs */
};
static const gdb_byte i386fbsd_sigtramp_end[] =
{
0xb8, 0xa1, 0x01, 0x00, 0x00, /* movl $SYS_sigreturn,%eax */
0x50, /* pushl %eax */
0xcd, 0x80 /* int $0x80 */
};
static const gdb_byte i386fbsd_freebsd4_sigtramp_start[] =
{
0x8d, 0x44, 0x24, 0x14, /* lea SIGF_UC4(%esp),%eax */
0x50 /* pushl %eax */
};
static const gdb_byte i386fbsd_freebsd4_sigtramp_middle[] =
{
0xf7, 0x40, 0x54, 0x00, 0x00, 0x02, 0x00,
/* testl $PSL_VM,UC4_EFLAGS(%eax) */
0x75, 0x03, /* jne +3 */
0x8e, 0x68, 0x14 /* mov UC4_GS(%eax),%gs */
};
static const gdb_byte i386fbsd_freebsd4_sigtramp_end[] =
{
0xb8, 0x58, 0x01, 0x00, 0x00, /* movl $344,%eax */
0x50, /* pushl %eax */
0xcd, 0x80 /* int $0x80 */
};
static const gdb_byte i386fbsd_osigtramp_start[] =
{
0x8d, 0x44, 0x24, 0x14, /* lea SIGF_SC(%esp),%eax */
0x50 /* pushl %eax */
};
static const gdb_byte i386fbsd_osigtramp_middle[] =
{
0xf7, 0x40, 0x18, 0x00, 0x00, 0x02, 0x00,
/* testl $PSL_VM,SC_PS(%eax) */
0x75, 0x03, /* jne +3 */
0x8e, 0x68, 0x44 /* mov SC_GS(%eax),%gs */
};
static const gdb_byte i386fbsd_osigtramp_end[] =
{
0xb8, 0x67, 0x00, 0x00, 0x00, /* movl $103,%eax */
0x50, /* pushl %eax */
0xcd, 0x80 /* int $0x80 */
};
/* The three different trampolines are all the same size. */
gdb_static_assert (sizeof i386fbsd_sigtramp_start
== sizeof i386fbsd_freebsd4_sigtramp_start);
gdb_static_assert (sizeof i386fbsd_sigtramp_start
== sizeof i386fbsd_osigtramp_start);
gdb_static_assert (sizeof i386fbsd_sigtramp_middle
== sizeof i386fbsd_freebsd4_sigtramp_middle);
gdb_static_assert (sizeof i386fbsd_sigtramp_middle
== sizeof i386fbsd_osigtramp_middle);
gdb_static_assert (sizeof i386fbsd_sigtramp_end
== sizeof i386fbsd_freebsd4_sigtramp_end);
gdb_static_assert (sizeof i386fbsd_sigtramp_end
== sizeof i386fbsd_osigtramp_end);
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
/* We assume that the middle is the largest chunk below. */
gdb_static_assert (sizeof i386fbsd_sigtramp_middle
> sizeof i386fbsd_sigtramp_start);
gdb_static_assert (sizeof i386fbsd_sigtramp_middle
> sizeof i386fbsd_sigtramp_end);
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
static int
i386fbsd_sigtramp_p (struct frame_info *this_frame)
{
CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[sizeof i386fbsd_sigtramp_middle];
const gdb_byte *middle, *end;
/* Look for a matching start. */
if (!safe_frame_unwind_memory (this_frame, pc, buf,
sizeof i386fbsd_sigtramp_start))
return 0;
if (memcmp (buf, i386fbsd_sigtramp_start, sizeof i386fbsd_sigtramp_start)
== 0)
{
middle = i386fbsd_sigtramp_middle;
end = i386fbsd_sigtramp_end;
}
else if (memcmp (buf, i386fbsd_freebsd4_sigtramp_start,
sizeof i386fbsd_freebsd4_sigtramp_start) == 0)
{
middle = i386fbsd_freebsd4_sigtramp_middle;
end = i386fbsd_freebsd4_sigtramp_end;
}
else if (memcmp (buf, i386fbsd_osigtramp_start,
sizeof i386fbsd_osigtramp_start) == 0)
{
middle = i386fbsd_osigtramp_middle;
end = i386fbsd_osigtramp_end;
}
else
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
return 0;
/* Since the end is shorter than the middle, check for a matching end
next. */
pc += sizeof i386fbsd_sigtramp_start;
if (!safe_frame_unwind_memory (this_frame, pc, buf,
sizeof i386fbsd_sigtramp_end))
return 0;
if (memcmp (buf, end, sizeof i386fbsd_sigtramp_end) == 0)
return 1;
/* If the end didn't match, check for a matching middle. */
if (!safe_frame_unwind_memory (this_frame, pc, buf,
sizeof i386fbsd_sigtramp_middle))
return 0;
if (memcmp (buf, middle, sizeof i386fbsd_sigtramp_middle) != 0)
return 0;
/* The middle matched, check for a matching end. */
pc += sizeof i386fbsd_sigtramp_middle;
if (!safe_frame_unwind_memory (this_frame, pc, buf,
sizeof i386fbsd_sigtramp_end))
return 0;
if (memcmp (buf, end, sizeof i386fbsd_sigtramp_end) != 0)
return 0;
return 1;
}
/* FreeBSD 3.0-RELEASE or later. */
/* From <machine/reg.h>. */
static int i386fbsd_r_reg_offset[] =
{
9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */
15 * 4, 4 * 4, /* %esp, %ebp */
3 * 4, 2 * 4, /* %esi, %edi */
12 * 4, 14 * 4, /* %eip, %eflags */
13 * 4, 16 * 4, /* %cs, %ss */
1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */
};
/* Sigtramp routine location. */
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
CORE_ADDR i386fbsd_sigtramp_start_addr;
CORE_ADDR i386fbsd_sigtramp_end_addr;
/* From <machine/signal.h>. */
int i386fbsd_sc_reg_offset[] =
{
8 + 14 * 4, /* %eax */
8 + 13 * 4, /* %ecx */
8 + 12 * 4, /* %edx */
8 + 11 * 4, /* %ebx */
8 + 0 * 4, /* %esp */
8 + 1 * 4, /* %ebp */
8 + 10 * 4, /* %esi */
8 + 9 * 4, /* %edi */
8 + 3 * 4, /* %eip */
8 + 4 * 4, /* %eflags */
8 + 7 * 4, /* %cs */
8 + 8 * 4, /* %ss */
8 + 6 * 4, /* %ds */
8 + 5 * 4, /* %es */
8 + 15 * 4, /* %fs */
8 + 16 * 4 /* %gs */
};
/* From /usr/src/lib/libc/i386/gen/_setjmp.S. */
static int i386fbsd_jmp_buf_reg_offset[] =
{
-1, /* %eax */
-1, /* %ecx */
-1, /* %edx */
1 * 4, /* %ebx */
2 * 4, /* %esp */
3 * 4, /* %ebp */
4 * 4, /* %esi */
5 * 4, /* %edi */
0 * 4 /* %eip */
};
Add support for the x86 XSAVE extended state on FreeBSD/x86. Recognize NT_X86_XSTATE notes in FreeBSD process cores. Recent FreeBSD versions include a note containing the XSAVE state for each thread in the process when XSAVE is in use. The note stores a copy of the current XSAVE mask in a reserved section of the machine-defined XSAVE state at the same offset as Linux's NT_X86_XSTATE note. For native processes, use the PT_GETXSTATE_INFO ptrace request to determine if XSAVE is enabled, and if so the active XSAVE state mask (that is, the value of %xcr0 for the target process) as well as the size of XSAVE state area. Use the PT_GETXSTATE and PT_SETXSTATE requests to fetch and store the XSAVE state, respectively, in the BSD x86 native targets. In addition, the FreeBSD amd64 and i386 native targets now include "read_description" target methods to determine the correct x86 target description for the current XSAVE mask. On FreeBSD amd64 this also properly returns an i386 target description for 32-bit binaries which allows the 64-bit GDB to run 32-bit binaries. Note that the ptrace changes are in the BSD native targets, not the FreeBSD-specific native targets since that is where the other ptrace register accesses occur. Of the other BSDs, NetBSD and DragonFly use XSAVE in the kernel but do not currently export the extended state via ptrace(2). OpenBSD does not currently support XSAVE. bfd/ChangeLog: * elf.c (elfcore_grok_note): Recognize NT_X86_XSTATE on FreeBSD. (elfcore_write_xstatereg): Use correct note name on FreeBSD. gdb/ChangeLog: * amd64-tdep.c (amd64_target_description): New function. * amd64-tdep.h: Export amd64_target_description and tdesc_amd64. * amd64bsd-nat.c [PT_GETXSTATE_INFO]: New variable amd64bsd_xsave_len. (amd64bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (amd64bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * amd64bsd-nat.h: Export amd64bsd_xsave_len. * amd64fbsd-nat.c (amd64fbsd_read_description): New function. (_initialize_amd64fbsd_nat): Set "to_read_description" to "amd64fbsd_read_description". * amd64fbsd-tdep.c (amd64fbsd_core_read_description): New function. (amd64fbsd_supply_xstateregset): New function. (amd64fbsd_collect_xstateregset): New function. Add "amd64fbsd_xstateregset". (amd64fbsd_iterate_over_regset_sections): New function. (amd64fbsd_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386-tdep.c (i386_target_description): New function. * i386-tdep.h: Export i386_target_description and tdesc_i386. * i386bsd-nat.c [PT_GETXSTATE_INFO]: New variable i386bsd_xsave_len. (i386bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (i386bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * i386bsd-nat.h: Export i386bsd_xsave_len. * i386fbsd-nat.c (i386fbsd_read_description): New function. (_initialize_i386fbsd_nat): Set "to_read_description" to "i386fbsd_read_description". * i386fbsd-tdep.c (i386fbsd_core_read_xcr0): New function. (i386fbsd_core_read_description): New function. (i386fbsd_supply_xstateregset): New function. (i386fbsd_collect_xstateregset): New function. Add "i386fbsd_xstateregset". (i386fbsd_iterate_over_regset_sections): New function. (i386fbsd4_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386fbsd-tdep.h: New file.
2015-02-21 22:43:30 +01:00
/* Get XSAVE extended state xcr0 from core dump. */
uint64_t
i386fbsd_core_read_xcr0 (bfd *abfd)
{
asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate");
uint64_t xcr0;
if (xstate)
{
size_t size = bfd_section_size (abfd, xstate);
/* Check extended state size. */
if (size < X86_XSTATE_AVX_SIZE)
xcr0 = X86_XSTATE_SSE_MASK;
else
{
char contents[8];
if (! bfd_get_section_contents (abfd, xstate, contents,
I386_FBSD_XSAVE_XCR0_OFFSET,
8))
{
warning (_("Couldn't read `xcr0' bytes from "
"`.reg-xstate' section in core file."));
return 0;
}
xcr0 = bfd_get_64 (abfd, contents);
}
}
else
xcr0 = 0;
return xcr0;
}
/* Implement the core_read_description gdbarch method. */
static const struct target_desc *
i386fbsd_core_read_description (struct gdbarch *gdbarch,
struct target_ops *target,
bfd *abfd)
{
return i386_target_description (i386fbsd_core_read_xcr0 (abfd));
}
/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
static void
i386fbsd_supply_xstateregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *xstateregs, size_t len)
{
i387_supply_xsave (regcache, regnum, xstateregs);
}
/* Similar to i386_collect_fpregset, but use XSAVE extended state. */
static void
i386fbsd_collect_xstateregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *xstateregs, size_t len)
{
i387_collect_xsave (regcache, regnum, xstateregs, 1);
}
/* Register set definitions. */
static const struct regset i386fbsd_xstateregset =
{
NULL,
i386fbsd_supply_xstateregset,
i386fbsd_collect_xstateregset
};
/* Iterate over core file register note sections. */
static void
i386fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
cb (".reg", tdep->sizeof_gregset, &i386_gregset, NULL, cb_data);
cb (".reg2", tdep->sizeof_fpregset, &i386_fpregset, NULL, cb_data);
if (tdep->xcr0 & X86_XSTATE_AVX)
cb (".reg-xstate", X86_XSTATE_SIZE(tdep->xcr0),
&i386fbsd_xstateregset, "XSAVE extended state", cb_data);
}
static void
i386fbsd_supply_uthread (struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
Use gdb_byte for bytes from the program being debugged. gdb_byte should be used for bytes from the program being debugged. We have many places using char or unsigned char instead all over the existing ports, and more ends up added over time due to copy/paste as new code is based on old code. I've greped the tree for "char buf[", and fixed all I found. Tested by building with --enable-targets=all. 2013-03-01 Pedro Alves <palves@redhat.com> Use gdb_byte for bytes from the program being debugged. * arm-tdep.c (arm_store_return_value, arm_get_longjmp_target): Change type of local 'buf' to gdb_byte. * avr-tdep.c (avr_frame_prev_register, avr_push_dummy_call): Likewise. * bfin-tdep.c (bfin_push_dummy_call): Likewise. * cris-tdep.c (cris_sigcontext_addr) (cris_sigtramp_frame_unwind_cache): Likewise. * frv-linux-tdep.c (frv_linux_pc_in_sigtramp) (frv_linux_sigcontext_reg_addr, frv_linux_sigtramp_frame_cache): Likewise. * frv-tdep.c (frv_pseudo_register_write, frv_analyze_prologue): Likewise. * hppa-hpux-tdep.c (hppa32_hpux_find_global_pointer) (hppa32_hpux_search_dummy_call_sequence) (hppa_hpux_supply_save_state): Likewise. * hppa-linux-tdep.c (insns_match_pattern) (hppa_linux_find_global_pointer): Likewise. * hppa-tdep.c (hppa_in_function_epilogue_p) (skip_prologue_hard_way, hppa_frame_cache): Likewise. * i386-nto-tdep.c (i386nto_sigcontext_addr): Likewise. * i386fbsd-tdep.c (i386fbsd_supply_uthread) (i386fbsd_collect_uthread): Likewise. * ia64-hpux-tdep.c (ia64_hpux_push_dummy_code): Likewise. * ia64-linux-tdep.c (ia64_linux_sigcontext_register_address): Likewise. * ia64-tdep.c (examine_prologue, ia64_frame_cache) (ia64_frame_prev_register, ia64_sigtramp_frame_cache) (ia64_sigtramp_frame_prev_register, ia64_access_reg) (ia64_access_rse_reg, ia64_libunwind_frame_this_id) (ia64_libunwind_frame_prev_register) (ia64_libunwind_sigtramp_frame_this_id) (ia64_find_global_pointer_from_dynamic_section) (find_extant_func_descr, find_func_descr, ia64_dummy_id) (ia64_unwind_pc): Likewise. * iq2000-tdep.c (iq2000_store_return_value): Likewise. * m68hc11-tdep.c (m68hc11_push_dummy_call) (m68hc11_extract_return_value): Likewise. * m68klinux-nat.c (fetch_register, store_register): Likewise. * mep-tdep.c (mep_pseudo_cr32_read, mep_pseudo_cr32_write) (mep_get_insn, mep_push_dummy_call): Likewise. * mips-linux-tdep.c (mips_linux_get_longjmp_target) (mips_linux_in_dynsym_stub): Likewise. * mn10300-tdep.c (mep_pseudo_cr32_write): Likewise. * ppc-linux-nat.c (fetch_register, store_register): Likewise. * regcache.c (dump_endian_bytes): Change type of parameter 'buf' to gdb_byte. * remote-mips.c (mips_set_register): Likewise. * remote-sim.c (gdbsim_fetch_register): Likewise. * score-tdep.c (score7_fetch_inst): Change type of parameter 'memblock' and local 'buf' to gdb_byte. (score7_malloc_and_get_memblock): Change return type to gdb_byte. Change type of local 'buf' to gdb_byte. Adjust. (score7_adjust_memblock_ptr): Change type of parameter 'memblock' to gdb_byte**. (score7_analyze_prologue): Change type of 'memblock' and 'memblock_ptr' locals to gdb_byte*. * sh64-tdep.c (sh64_extract_return_value) (sh64_store_return_value): Change type of local 'buf' to gdb_byte. * solib-darwin.c (darwin_current_sos, darwin_read_exec_load_addr): * solib-pa64.c (pa64_solib_create_inferior_hook) (pa64_open_symbol_file_object): Remove local 'buf'. * solib-som.c (som_solib_create_inferior_hook, link_map_start) (som_open_symbol_file_object): Likewise. * solib-spu.c (spu_current_sos): Likewise. * spu-linux-nat.c (spu_fetch_inferior_registers): Likewise. * spu-multiarch.c (parse_spufs_run, spu_fetch_registers) (spu_store_registers): Likewise. * target.c (debug_print_register): Likewise. * tic6x-tdep.c (tic6x_get_longjmp_target): Likewise. * xstormy16-tdep.c (xstormy16_store_return_value) (xstormy16_push_dummy_call, xstormy16_resolve_jmp_table_entry) (xstormy16_find_jmp_table_entry): Likewise.
2013-03-01 16:38:27 +01:00
gdb_byte buf[4];
int i;
gdb_assert (regnum >= -1);
for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
{
if (i386fbsd_jmp_buf_reg_offset[i] != -1
&& (regnum == -1 || regnum == i))
{
read_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
regcache_raw_supply (regcache, i, buf);
}
}
}
static void
i386fbsd_collect_uthread (const struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
Use gdb_byte for bytes from the program being debugged. gdb_byte should be used for bytes from the program being debugged. We have many places using char or unsigned char instead all over the existing ports, and more ends up added over time due to copy/paste as new code is based on old code. I've greped the tree for "char buf[", and fixed all I found. Tested by building with --enable-targets=all. 2013-03-01 Pedro Alves <palves@redhat.com> Use gdb_byte for bytes from the program being debugged. * arm-tdep.c (arm_store_return_value, arm_get_longjmp_target): Change type of local 'buf' to gdb_byte. * avr-tdep.c (avr_frame_prev_register, avr_push_dummy_call): Likewise. * bfin-tdep.c (bfin_push_dummy_call): Likewise. * cris-tdep.c (cris_sigcontext_addr) (cris_sigtramp_frame_unwind_cache): Likewise. * frv-linux-tdep.c (frv_linux_pc_in_sigtramp) (frv_linux_sigcontext_reg_addr, frv_linux_sigtramp_frame_cache): Likewise. * frv-tdep.c (frv_pseudo_register_write, frv_analyze_prologue): Likewise. * hppa-hpux-tdep.c (hppa32_hpux_find_global_pointer) (hppa32_hpux_search_dummy_call_sequence) (hppa_hpux_supply_save_state): Likewise. * hppa-linux-tdep.c (insns_match_pattern) (hppa_linux_find_global_pointer): Likewise. * hppa-tdep.c (hppa_in_function_epilogue_p) (skip_prologue_hard_way, hppa_frame_cache): Likewise. * i386-nto-tdep.c (i386nto_sigcontext_addr): Likewise. * i386fbsd-tdep.c (i386fbsd_supply_uthread) (i386fbsd_collect_uthread): Likewise. * ia64-hpux-tdep.c (ia64_hpux_push_dummy_code): Likewise. * ia64-linux-tdep.c (ia64_linux_sigcontext_register_address): Likewise. * ia64-tdep.c (examine_prologue, ia64_frame_cache) (ia64_frame_prev_register, ia64_sigtramp_frame_cache) (ia64_sigtramp_frame_prev_register, ia64_access_reg) (ia64_access_rse_reg, ia64_libunwind_frame_this_id) (ia64_libunwind_frame_prev_register) (ia64_libunwind_sigtramp_frame_this_id) (ia64_find_global_pointer_from_dynamic_section) (find_extant_func_descr, find_func_descr, ia64_dummy_id) (ia64_unwind_pc): Likewise. * iq2000-tdep.c (iq2000_store_return_value): Likewise. * m68hc11-tdep.c (m68hc11_push_dummy_call) (m68hc11_extract_return_value): Likewise. * m68klinux-nat.c (fetch_register, store_register): Likewise. * mep-tdep.c (mep_pseudo_cr32_read, mep_pseudo_cr32_write) (mep_get_insn, mep_push_dummy_call): Likewise. * mips-linux-tdep.c (mips_linux_get_longjmp_target) (mips_linux_in_dynsym_stub): Likewise. * mn10300-tdep.c (mep_pseudo_cr32_write): Likewise. * ppc-linux-nat.c (fetch_register, store_register): Likewise. * regcache.c (dump_endian_bytes): Change type of parameter 'buf' to gdb_byte. * remote-mips.c (mips_set_register): Likewise. * remote-sim.c (gdbsim_fetch_register): Likewise. * score-tdep.c (score7_fetch_inst): Change type of parameter 'memblock' and local 'buf' to gdb_byte. (score7_malloc_and_get_memblock): Change return type to gdb_byte. Change type of local 'buf' to gdb_byte. Adjust. (score7_adjust_memblock_ptr): Change type of parameter 'memblock' to gdb_byte**. (score7_analyze_prologue): Change type of 'memblock' and 'memblock_ptr' locals to gdb_byte*. * sh64-tdep.c (sh64_extract_return_value) (sh64_store_return_value): Change type of local 'buf' to gdb_byte. * solib-darwin.c (darwin_current_sos, darwin_read_exec_load_addr): * solib-pa64.c (pa64_solib_create_inferior_hook) (pa64_open_symbol_file_object): Remove local 'buf'. * solib-som.c (som_solib_create_inferior_hook, link_map_start) (som_open_symbol_file_object): Likewise. * solib-spu.c (spu_current_sos): Likewise. * spu-linux-nat.c (spu_fetch_inferior_registers): Likewise. * spu-multiarch.c (parse_spufs_run, spu_fetch_registers) (spu_store_registers): Likewise. * target.c (debug_print_register): Likewise. * tic6x-tdep.c (tic6x_get_longjmp_target): Likewise. * xstormy16-tdep.c (xstormy16_store_return_value) (xstormy16_push_dummy_call, xstormy16_resolve_jmp_table_entry) (xstormy16_find_jmp_table_entry): Likewise.
2013-03-01 16:38:27 +01:00
gdb_byte buf[4];
int i;
gdb_assert (regnum >= -1);
for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
{
if (i386fbsd_jmp_buf_reg_offset[i] != -1
&& (regnum == -1 || regnum == i))
{
regcache_raw_collect (regcache, i, buf);
write_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
}
}
}
static void
i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Obviously FreeBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
/* FreeBSD has a different `struct reg', and reserves some space for
its FPU emulator in `struct fpreg'. */
tdep->gregset_reg_offset = i386fbsd_r_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd_r_reg_offset);
tdep->sizeof_gregset = 18 * 4;
tdep->sizeof_fpregset = 176;
/* FreeBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
Rework signal frame probing for FreeBSD/x86 - Use signal frame sniffers that look for the signal trampoline instruction sequence to detect most signal frames. - FreeBSD kernels between 9.2 and 10.1 inclusive do not include the signal trampoline code in process core dumps. To detect signal frames for core dumps under these kernels, use the kern.proc.sigtramp.<pid> sysctl to fetch the location of the signal trampoline in the gdb process and assume that PC values within this location are signal frames. This depends on that location being identical for all binaries. gdb/ChangeLog: 2015-02-25 John Baldwin <jhb@FreeBSD.org> * amd64fbsd-nat.c: Include sys/user.h. (_initialize_amd64fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * i386fbsd-nat.c: Include sys/user.h. (_initialize_i386fbsd_nat): Use the KERN_PROC_SIGTRAMP sysctl instead of KERN_PS_STRINGS to locate the signal trampoline. * amd64fbsd-tdep.c (amd64fbsd_sigtramp_code): New. (amd64fbsd_sigtramp_p): New. (amd64fbsd_sigtramp_start_addr, amd64fbsd_sigtramp_end_addr): No longer set default values. (amd64fbsd_init_abi): Set "sigtramp_p" to "amd64fbsd_sigtramp_p". * i386fbsd-tdep.c (i386fbsd_sigtramp_start) (i386fbsd_sigtramp_middle, i386fbsd_sigtramp_end) (i386fbsd_freebsd4_sigtramp_start) (i386fbsd_freebsd4_sigtramp_middle) (i386fbsd_freebsd4_sigtramp_end, i386fbsd_osigtramp_start) (i386fbsd_osigtramp_middle, i386fbsd_osigtramp_end): New. (i386fbsd_sigtramp_p): New. (i386fbsd_sigtramp_start_addr, i386fbsd_sigtramp_end_addr): No longer set default values. (i386fbsd_init_abi): Set "sigtramp_p" to "i386fbsd_sigtramp_p".
2015-02-25 15:51:42 +01:00
tdep->sigtramp_p = i386fbsd_sigtramp_p;
/* FreeBSD uses a different memory layout. */
tdep->sigtramp_start = i386fbsd_sigtramp_start_addr;
tdep->sigtramp_end = i386fbsd_sigtramp_end_addr;
/* FreeBSD has a more complete `struct sigcontext'. */
tdep->sc_reg_offset = i386fbsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset);
/* FreeBSD provides a user-level threads implementation. */
bsd_uthread_set_supply_uthread (gdbarch, i386fbsd_supply_uthread);
bsd_uthread_set_collect_uthread (gdbarch, i386fbsd_collect_uthread);
}
static void
i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* It's almost identical to FreeBSD a.out. */
i386fbsdaout_init_abi (info, gdbarch);
/* Except that it uses ELF. */
i386_elf_init_abi (info, gdbarch);
/* FreeBSD ELF uses SVR4-style shared libraries. */
* amd64fbsd-tdep.c: Include "solib-svr4.h". (amd64fbsd_init_abi): Set link map offsets. * amd64nbsd-tdep.c: Include "slib-svr4.h". (amd64nbsd_init_abi): Set link map offsets. * amd64obsd-tdep.c: Include "solib-svr4.h". (amd64obsd_init_abi): Set link map offsets. * i386fbsd-tdep.c: Include "solib-svr4.h". (i386fbsd_init_abi): Set link map offsets. * i386nbsd-tdep.c: Include "solib-svr4.h". (i386nbsdelf_init_abi): Set link map offsets. * Makefile.in (amd64fbsd-tdep.o, amd64nbsd-tdep.o) (amd64obsd-tdep.o, i386fbsd-tdep.o): Update dependencies. * config/i386/fbsd.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and core-aout.o. Reformat. * config/i386/fbsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o. Reformat. * config/i386/nbsdaout.mh (NATDEPFILES): Add solib.o. Reformat. * config/i386/nbsdelf.mh: Reformat. * config/i386/nbsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and corelow.o. * config/i386/obsd.mh, config/i386/obsdaout.mh: Reformat. * config/i386/obsd64.mh (NATDEPFILES): Remove solib.o, solib-svr4.o, solib-legacy.o and corelow.o. Reformat. * config/i386/fbsd.mt (TDEPFILES): Add solib.o, solib-svr4.o. * config/i386/fbsd64.mt (TDEPFILES): Add solib.o, solib-svr4.o. (TM_FILE): Set to tm-fbsd.h. * config/i386/nbsd.mt (TDEPFILES): Reformat. * config/i386/nbsd64.mt (TDEPFILES): Add corelow.o, solib.o and solib-svr4.o. * config/i386/obsd.mt (TDEPFILES): Add corelow.o, solib.o and solib-svr4.o. (TM_FILE): Set to nm-nbsd.h. * config/i386/nm-fbsd.h: Update copyright year. Tweak comments. Simplify shared library support. Don't include "elf/common.h". (SVR4_SHARED_LIBS): Don't define. * config/i386/nm-fbsd64.h: Update copyright year. Don't include "solib.h". * config/i386/nm-nbsd.h, config/i386/nm-nbsdaout.h, config/i386/nm-obsd.h: Update copyright year. Tweak comments. * config/i386/tm-fbsd.h: Update copyright tear. Tweak comments. Don't include "i386/tm-i386.h". Include "solib.h". * config/i386/tm-nbsd.h: Update copyright year. Tweak comments. Don't include "i386/tm-i386.h". * config/i386/xm-i386.h: Update copyright year. Tweak comments. * config/i386/xm-nbsd.h: Update copyright year. Tweak comments. Include "i386/xm-i386.h". (HOST_LONG_DOUBLE_FORMAT): Remove.
2004-02-22 17:20:22 +01:00
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
/* FreeBSD 4.0-RELEASE or later. */
/* From <machine/reg.h>. */
static int i386fbsd4_r_reg_offset[] =
{
10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */
16 * 4, 5 * 4, /* %esp, %ebp */
4 * 4, 3 * 4, /* %esi, %edi */
13 * 4, 15 * 4, /* %eip, %eflags */
14 * 4, 17 * 4, /* %cs, %ss */
2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */
};
/* From <machine/signal.h>. */
int i386fbsd4_sc_reg_offset[] =
{
20 + 11 * 4, /* %eax */
20 + 10 * 4, /* %ecx */
20 + 9 * 4, /* %edx */
20 + 8 * 4, /* %ebx */
20 + 17 * 4, /* %esp */
20 + 6 * 4, /* %ebp */
20 + 5 * 4, /* %esi */
20 + 4 * 4, /* %edi */
20 + 14 * 4, /* %eip */
20 + 16 * 4, /* %eflags */
20 + 15 * 4, /* %cs */
20 + 18 * 4, /* %ss */
20 + 3 * 4, /* %ds */
20 + 2 * 4, /* %es */
20 + 1 * 4, /* %fs */
20 + 0 * 4 /* %gs */
};
static void
i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Generic FreeBSD support. */
fbsd_init_abi (info, gdbarch);
/* Inherit stuff from older releases. We assume that FreeBSD
4.0-RELEASE always uses ELF. */
i386fbsd_init_abi (info, gdbarch);
/* FreeBSD 4.0 introduced a new `struct reg'. */
tdep->gregset_reg_offset = i386fbsd4_r_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd4_r_reg_offset);
tdep->sizeof_gregset = 19 * 4;
/* FreeBSD 4.0 introduced a new `struct sigcontext'. */
tdep->sc_reg_offset = i386fbsd4_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset);
Add support for the x86 XSAVE extended state on FreeBSD/x86. Recognize NT_X86_XSTATE notes in FreeBSD process cores. Recent FreeBSD versions include a note containing the XSAVE state for each thread in the process when XSAVE is in use. The note stores a copy of the current XSAVE mask in a reserved section of the machine-defined XSAVE state at the same offset as Linux's NT_X86_XSTATE note. For native processes, use the PT_GETXSTATE_INFO ptrace request to determine if XSAVE is enabled, and if so the active XSAVE state mask (that is, the value of %xcr0 for the target process) as well as the size of XSAVE state area. Use the PT_GETXSTATE and PT_SETXSTATE requests to fetch and store the XSAVE state, respectively, in the BSD x86 native targets. In addition, the FreeBSD amd64 and i386 native targets now include "read_description" target methods to determine the correct x86 target description for the current XSAVE mask. On FreeBSD amd64 this also properly returns an i386 target description for 32-bit binaries which allows the 64-bit GDB to run 32-bit binaries. Note that the ptrace changes are in the BSD native targets, not the FreeBSD-specific native targets since that is where the other ptrace register accesses occur. Of the other BSDs, NetBSD and DragonFly use XSAVE in the kernel but do not currently export the extended state via ptrace(2). OpenBSD does not currently support XSAVE. bfd/ChangeLog: * elf.c (elfcore_grok_note): Recognize NT_X86_XSTATE on FreeBSD. (elfcore_write_xstatereg): Use correct note name on FreeBSD. gdb/ChangeLog: * amd64-tdep.c (amd64_target_description): New function. * amd64-tdep.h: Export amd64_target_description and tdesc_amd64. * amd64bsd-nat.c [PT_GETXSTATE_INFO]: New variable amd64bsd_xsave_len. (amd64bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (amd64bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * amd64bsd-nat.h: Export amd64bsd_xsave_len. * amd64fbsd-nat.c (amd64fbsd_read_description): New function. (_initialize_amd64fbsd_nat): Set "to_read_description" to "amd64fbsd_read_description". * amd64fbsd-tdep.c (amd64fbsd_core_read_description): New function. (amd64fbsd_supply_xstateregset): New function. (amd64fbsd_collect_xstateregset): New function. Add "amd64fbsd_xstateregset". (amd64fbsd_iterate_over_regset_sections): New function. (amd64fbsd_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386-tdep.c (i386_target_description): New function. * i386-tdep.h: Export i386_target_description and tdesc_i386. * i386bsd-nat.c [PT_GETXSTATE_INFO]: New variable i386bsd_xsave_len. (i386bsd_fetch_inferior_registers) [PT_GETXSTATE_INFO]: Handle x86 extended save area. (i386bsd_store_inferior_registers) [PT_GETXSTATE_INFO]: Likewise. * i386bsd-nat.h: Export i386bsd_xsave_len. * i386fbsd-nat.c (i386fbsd_read_description): New function. (_initialize_i386fbsd_nat): Set "to_read_description" to "i386fbsd_read_description". * i386fbsd-tdep.c (i386fbsd_core_read_xcr0): New function. (i386fbsd_core_read_description): New function. (i386fbsd_supply_xstateregset): New function. (i386fbsd_collect_xstateregset): New function. Add "i386fbsd_xstateregset". (i386fbsd_iterate_over_regset_sections): New function. (i386fbsd4_init_abi): Set "xsave_xcr0_offset" to "I386_FBSD_XSAVE_XCR0_OFFSET". Add "iterate_over_regset_sections" gdbarch method. Add "core_read_description" gdbarch method. * i386fbsd-tdep.h: New file.
2015-02-21 22:43:30 +01:00
tdep->xsave_xcr0_offset = I386_FBSD_XSAVE_XCR0_OFFSET;
/* Iterate over core file register note sections. */
set_gdbarch_iterate_over_regset_sections
(gdbarch, i386fbsd_iterate_over_regset_sections);
set_gdbarch_core_read_description (gdbarch,
i386fbsd_core_read_description);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_i386fbsd_tdep (void);
void
_initialize_i386fbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT,
i386fbsdaout_init_abi);
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF,
i386fbsd4_init_abi);
}