X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fi386-linux-tdep.c;h=eeaf6211ef2f64f38c730dd66ba55bb30b68866d;hb=a8836c9358a11055a08d11ecacc5d7c8f6d5e7a8;hp=e76585d7e8ef87699bb3214a4e902b28c0cbe7e8;hpb=6aba47ca06d9150c6196a374b745c2711b46e045;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c
index e76585d7e8..eeaf6211ef 100644
--- a/gdb/i386-linux-tdep.c
+++ b/gdb/i386-linux-tdep.c
@@ -1,13 +1,12 @@
/* Target-dependent code for GNU/Linux i386.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2016 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
+ 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,
@@ -16,38 +15,42 @@
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
#include "defs.h"
#include "gdbcore.h"
#include "frame.h"
#include "value.h"
#include "regcache.h"
+#include "regset.h"
#include "inferior.h"
#include "osabi.h"
#include "reggroups.h"
#include "dwarf2-frame.h"
-#include "gdb_string.h"
-
#include "i386-tdep.h"
#include "i386-linux-tdep.h"
+#include "linux-tdep.h"
+#include "utils.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
+#include "arch-utils.h"
+#include "xml-syscall.h"
-/* Return the name of register REG. */
+#include "i387-tdep.h"
+#include "x86-xstate.h"
-static const char *
-i386_linux_register_name (int reg)
-{
- /* Deal with the extra "orig_eax" pseudo register. */
- if (reg == I386_LINUX_ORIG_EAX_REGNUM)
- return "orig_eax";
+/* The syscall's XML filename for i386. */
+#define XML_SYSCALL_FILENAME_I386 "syscalls/i386-linux.xml"
- return i386_register_name (reg);
-}
+#include "record-full.h"
+#include "linux-record.h"
+#include "features/i386/i386-linux.c"
+#include "features/i386/i386-mmx-linux.c"
+#include "features/i386/i386-mpx-linux.c"
+#include "features/i386/i386-avx-mpx-linux.c"
+#include "features/i386/i386-avx-linux.c"
+#include "features/i386/i386-avx512-linux.c"
/* Return non-zero, when the register is in the corresponding register
group. Put the LINUX_ORIG_EAX register in the system group. */
@@ -117,13 +120,13 @@ static const gdb_byte linux_sigtramp_code[] =
#define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code)
-/* If NEXT_FRAME unwinds into a sigtramp routine, return the address
- of the start of the routine. Otherwise, return 0. */
+/* If THIS_FRAME is a sigtramp routine, return the address of the
+ start of the routine. Otherwise, return 0. */
static CORE_ADDR
-i386_linux_sigtramp_start (struct frame_info *next_frame)
+i386_linux_sigtramp_start (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[LINUX_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
@@ -133,7 +136,7 @@ i386_linux_sigtramp_start (struct frame_info *next_frame)
PC is not at the start of the instruction sequence, there will be
a few trailing readable bytes on the stack. */
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN))
return 0;
if (buf[0] != LINUX_SIGTRAMP_INSN0)
@@ -154,7 +157,7 @@ i386_linux_sigtramp_start (struct frame_info *next_frame)
pc -= adjust;
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN))
return 0;
}
@@ -185,13 +188,13 @@ static const gdb_byte linux_rt_sigtramp_code[] =
#define LINUX_RT_SIGTRAMP_LEN (sizeof linux_rt_sigtramp_code)
-/* If NEXT_FRAME unwinds into an RT sigtramp routine, return the
- address of the start of the routine. Otherwise, return 0. */
+/* If THIS_FRAME is an RT sigtramp routine, return the address of the
+ start of the routine. Otherwise, return 0. */
static CORE_ADDR
-i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
+i386_linux_rt_sigtramp_start (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[LINUX_RT_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
@@ -201,7 +204,7 @@ i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
PC is not at the start of the instruction sequence, there will be
a few trailing readable bytes on the stack. */
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN))
return 0;
if (buf[0] != LINUX_RT_SIGTRAMP_INSN0)
@@ -211,7 +214,7 @@ i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
pc -= LINUX_RT_SIGTRAMP_OFFSET1;
- if (!safe_frame_unwind_memory (next_frame, pc, buf,
+ if (!safe_frame_unwind_memory (this_frame, pc, buf,
LINUX_RT_SIGTRAMP_LEN))
return 0;
}
@@ -222,14 +225,14 @@ i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
return pc;
}
-/* Return whether the frame preceding NEXT_FRAME corresponds to a
- GNU/Linux sigtramp routine. */
+/* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp
+ routine. */
static int
-i386_linux_sigtramp_p (struct frame_info *next_frame)
+i386_linux_sigtramp_p (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
@@ -239,22 +242,22 @@ i386_linux_sigtramp_p (struct frame_info *next_frame)
be part of the preceding function. This should always be sigaction,
__sigaction, or __libc_sigaction (all aliases to the same function). */
if (name == NULL || strstr (name, "sigaction") != NULL)
- return (i386_linux_sigtramp_start (next_frame) != 0
- || i386_linux_rt_sigtramp_start (next_frame) != 0);
+ return (i386_linux_sigtramp_start (this_frame) != 0
+ || i386_linux_rt_sigtramp_start (this_frame) != 0);
return (strcmp ("__restore", name) == 0
|| strcmp ("__restore_rt", name) == 0);
}
-/* Return one if the unwound PC from NEXT_FRAME is in a signal trampoline
- which may have DWARF-2 CFI. */
+/* Return one if the PC of THIS_FRAME is in a signal trampoline which
+ may have DWARF-2 CFI. */
static int
i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch,
- struct frame_info *next_frame)
+ struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
@@ -270,20 +273,22 @@ i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch,
/* Offset to struct sigcontext in ucontext, from . */
#define I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 20
-/* Assuming NEXT_FRAME is a frame following a GNU/Linux sigtramp
- routine, return the address of the associated sigcontext structure. */
+/* Assuming THIS_FRAME is a GNU/Linux sigtramp routine, return the
+ address of the associated sigcontext structure. */
static CORE_ADDR
-i386_linux_sigcontext_addr (struct frame_info *next_frame)
+i386_linux_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR pc;
CORE_ADDR sp;
gdb_byte buf[4];
- frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
- sp = extract_unsigned_integer (buf, 4);
+ get_frame_register (this_frame, I386_ESP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
- pc = i386_linux_sigtramp_start (next_frame);
+ pc = i386_linux_sigtramp_start (this_frame);
if (pc)
{
/* The sigcontext structure lives on the stack, right after
@@ -292,12 +297,12 @@ i386_linux_sigcontext_addr (struct frame_info *next_frame)
pointer. Keep in mind that the first instruction of the
sigtramp code is "pop %eax". If the PC is after this
instruction, adjust the returned value accordingly. */
- if (pc == frame_pc_unwind (next_frame))
+ if (pc == get_frame_pc (this_frame))
return sp + 4;
return sp;
}
- pc = i386_linux_rt_sigtramp_start (next_frame);
+ pc = i386_linux_rt_sigtramp_start (this_frame);
if (pc)
{
CORE_ADDR ucontext_addr;
@@ -306,7 +311,7 @@ i386_linux_sigcontext_addr (struct frame_info *next_frame)
pointer to the user context is passed as the third argument
to the signal handler. */
read_memory (sp + 8, buf, 4);
- ucontext_addr = extract_unsigned_integer (buf, 4);
+ ucontext_addr = extract_unsigned_integer (buf, 4, byte_order);
return ucontext_addr + I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET;
}
@@ -317,9 +322,9 @@ i386_linux_sigcontext_addr (struct frame_info *next_frame)
/* Set the program counter for process PTID to PC. */
static void
-i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
+i386_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- write_register_pid (I386_EIP_REGNUM, pc, ptid);
+ regcache_cooked_write_unsigned (regcache, I386_EIP_REGNUM, pc);
/* We must be careful with modifying the program counter. If we
just interrupted a system call, the kernel might try to restart
@@ -335,10 +340,240 @@ i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
when we resume the inferior on return from a function call from
within GDB. In all other cases the system call will not be
restarted. */
- write_register_pid (I386_LINUX_ORIG_EAX_REGNUM, -1, ptid);
+ regcache_cooked_write_unsigned (regcache, I386_LINUX_ORIG_EAX_REGNUM, -1);
+}
+
+/* Record all registers but IP register for process-record. */
+
+static int
+i386_all_but_ip_registers_record (struct regcache *regcache)
+{
+ if (record_full_arch_list_add_reg (regcache, I386_EAX_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_ECX_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_EDX_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_EBX_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_ESP_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_EBP_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_ESI_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_EDI_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, I386_EFLAGS_REGNUM))
+ return -1;
+
+ return 0;
+}
+
+/* i386_canonicalize_syscall maps from the native i386 Linux set
+ of syscall ids into a canonical set of syscall ids used by
+ process record (a mostly trivial mapping, since the canonical
+ set was originally taken from the i386 set). */
+
+static enum gdb_syscall
+i386_canonicalize_syscall (int syscall)
+{
+ enum { i386_syscall_max = 499 };
+
+ if (syscall <= i386_syscall_max)
+ return (enum gdb_syscall) syscall;
+ else
+ return gdb_sys_no_syscall;
+}
+
+/* Value of the sigcode in case of a boundary fault. */
+
+#define SIG_CODE_BONDARY_FAULT 3
+
+/* i386 GNU/Linux implementation of the handle_segmentation_fault
+ gdbarch hook. Displays information related to MPX bound
+ violations. */
+void
+i386_linux_handle_segmentation_fault (struct gdbarch *gdbarch,
+ struct ui_out *uiout)
+{
+ /* -Wmaybe-uninitialized */
+ CORE_ADDR lower_bound = 0, upper_bound = 0, access = 0;
+ int is_upper;
+ long sig_code = 0;
+
+ if (!i386_mpx_enabled ())
+ return;
+
+ TRY
+ {
+ /* Sigcode evaluates if the actual segfault is a boundary violation. */
+ sig_code = parse_and_eval_long ("$_siginfo.si_code\n");
+
+ lower_bound
+ = parse_and_eval_long ("$_siginfo._sifields._sigfault._addr_bnd._lower");
+ upper_bound
+ = parse_and_eval_long ("$_siginfo._sifields._sigfault._addr_bnd._upper");
+ access
+ = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr");
+ }
+ CATCH (exception, RETURN_MASK_ALL)
+ {
+ return;
+ }
+ END_CATCH
+
+ /* If this is not a boundary violation just return. */
+ if (sig_code != SIG_CODE_BONDARY_FAULT)
+ return;
+
+ is_upper = (access > upper_bound ? 1 : 0);
+
+ ui_out_text (uiout, "\n");
+ if (is_upper)
+ ui_out_field_string (uiout, "sigcode-meaning",
+ _("Upper bound violation"));
+ else
+ ui_out_field_string (uiout, "sigcode-meaning",
+ _("Lower bound violation"));
+
+ ui_out_text (uiout, _(" while accessing address "));
+ ui_out_field_fmt (uiout, "bound-access", "%s",
+ paddress (gdbarch, access));
+
+ ui_out_text (uiout, _("\nBounds: [lower = "));
+ ui_out_field_fmt (uiout, "lower-bound", "%s",
+ paddress (gdbarch, lower_bound));
+
+ ui_out_text (uiout, _(", upper = "));
+ ui_out_field_fmt (uiout, "upper-bound", "%s",
+ paddress (gdbarch, upper_bound));
+
+ ui_out_text (uiout, _("]"));
+}
+
+/* Parse the arguments of current system call instruction and record
+ the values of the registers and memory that will be changed into
+ "record_arch_list". This instruction is "int 0x80" (Linux
+ Kernel2.4) or "sysenter" (Linux Kernel 2.6).
+
+ Return -1 if something wrong. */
+
+static struct linux_record_tdep i386_linux_record_tdep;
+
+static int
+i386_linux_intx80_sysenter_syscall_record (struct regcache *regcache)
+{
+ int ret;
+ LONGEST syscall_native;
+ enum gdb_syscall syscall_gdb;
+
+ regcache_raw_read_signed (regcache, I386_EAX_REGNUM, &syscall_native);
+
+ syscall_gdb = i386_canonicalize_syscall (syscall_native);
+
+ if (syscall_gdb < 0)
+ {
+ printf_unfiltered (_("Process record and replay target doesn't "
+ "support syscall number %s\n"),
+ plongest (syscall_native));
+ return -1;
+ }
+
+ if (syscall_gdb == gdb_sys_sigreturn
+ || syscall_gdb == gdb_sys_rt_sigreturn)
+ {
+ if (i386_all_but_ip_registers_record (regcache))
+ return -1;
+ return 0;
+ }
+
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &i386_linux_record_tdep);
+ if (ret)
+ return ret;
+
+ /* Record the return value of the system call. */
+ if (record_full_arch_list_add_reg (regcache, I386_EAX_REGNUM))
+ return -1;
+
+ return 0;
+}
+
+#define I386_LINUX_xstate 270
+#define I386_LINUX_frame_size 732
+
+static int
+i386_linux_record_signal (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ enum gdb_signal signal)
+{
+ ULONGEST esp;
+
+ if (i386_all_but_ip_registers_record (regcache))
+ return -1;
+
+ if (record_full_arch_list_add_reg (regcache, I386_EIP_REGNUM))
+ return -1;
+
+ /* Record the change in the stack. */
+ regcache_raw_read_unsigned (regcache, I386_ESP_REGNUM, &esp);
+ /* This is for xstate.
+ sp -= sizeof (struct _fpstate); */
+ esp -= I386_LINUX_xstate;
+ /* This is for frame_size.
+ sp -= sizeof (struct rt_sigframe); */
+ esp -= I386_LINUX_frame_size;
+ if (record_full_arch_list_add_mem (esp,
+ I386_LINUX_xstate + I386_LINUX_frame_size))
+ return -1;
+
+ if (record_full_arch_list_add_end ())
+ return -1;
+
+ return 0;
}
+/* Core of the implementation for gdbarch get_syscall_number. Get pending
+ syscall number from REGCACHE. If there is no pending syscall -1 will be
+ returned. Pending syscall means ptrace has stepped into the syscall but
+ another ptrace call will step out. PC is right after the int $0x80
+ / syscall / sysenter instruction in both cases, PC does not change during
+ the second ptrace step. */
+
+static LONGEST
+i386_linux_get_syscall_number_from_regcache (struct regcache *regcache)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ /* The content of a register. */
+ gdb_byte buf[4];
+ /* The result. */
+ LONGEST ret;
+
+ /* Getting the system call number from the register.
+ When dealing with x86 architecture, this information
+ is stored at %eax register. */
+ regcache_cooked_read (regcache, I386_LINUX_ORIG_EAX_REGNUM, buf);
+
+ ret = extract_signed_integer (buf, 4, byte_order);
+
+ return ret;
+}
+
+/* Wrapper for i386_linux_get_syscall_number_from_regcache to make it
+ compatible with gdbarch get_syscall_number method prototype. */
+
+static LONGEST
+i386_linux_get_syscall_number (struct gdbarch *gdbarch,
+ ptid_t ptid)
+{
+ struct regcache *regcache = get_thread_regcache (ptid);
+
+ return i386_linux_get_syscall_number_from_regcache (regcache);
+}
+
/* The register sets used in GNU/Linux ELF core-dumps are identical to
the register sets in `struct user' that are used for a.out
core-dumps. These are also used by ptrace(2). The corresponding
@@ -355,7 +590,7 @@ i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
format and GDB's register cache layout. */
/* From . */
-static int i386_linux_gregset_reg_offset[] =
+int i386_linux_gregset_reg_offset[] =
{
6 * 4, /* %eax */
1 * 4, /* %ecx */
@@ -377,7 +612,12 @@ static int i386_linux_gregset_reg_offset[] =
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1,
- 11 * 4 /* "orig_eax" */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */
+ -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm7 (AVX512) */
+ 11 * 4, /* "orig_eax" */
};
/* Mapping between the general-purpose registers in `struct
@@ -404,21 +644,216 @@ static int i386_linux_sc_reg_offset[] =
0 * 4 /* %gs */
};
+/* Get XSAVE extended state xcr0 from core dump. */
+
+uint64_t
+i386_linux_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_LINUX_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;
+}
+
+/* Get Linux/x86 target description from core dump. */
+
+static const struct target_desc *
+i386_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
+{
+ /* Linux/i386. */
+ uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd);
+
+ switch ((xcr0 & X86_XSTATE_ALL_MASK))
+ {
+ case X86_XSTATE_MPX_AVX512_MASK:
+ case X86_XSTATE_AVX512_MASK:
+ return tdesc_i386_avx512_linux;
+ case X86_XSTATE_MPX_MASK:
+ return tdesc_i386_mpx_linux;
+ case X86_XSTATE_AVX_MPX_MASK:
+ return tdesc_i386_avx_mpx_linux;
+ case X86_XSTATE_AVX_MASK:
+ return tdesc_i386_avx_linux;
+ case X86_XSTATE_SSE_MASK:
+ return tdesc_i386_linux;
+ case X86_XSTATE_X87_MASK:
+ return tdesc_i386_mmx_linux;
+ default:
+ break;
+ }
+
+ if (bfd_get_section_by_name (abfd, ".reg-xfp") != NULL)
+ return tdesc_i386_linux;
+ else
+ return tdesc_i386_mmx_linux;
+}
+
+/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
+
+static void
+i386_linux_supply_xstateregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *xstateregs, size_t len)
+{
+ i387_supply_xsave (regcache, regnum, xstateregs);
+}
+
+struct type *
+x86_linux_get_siginfo_type (struct gdbarch *gdbarch)
+{
+ return linux_get_siginfo_type_with_fields (gdbarch, LINUX_SIGINFO_FIELD_ADDR_BND);
+}
+
+/* Similar to i386_collect_fpregset, but use XSAVE extended state. */
+
+static void
+i386_linux_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 i386_linux_xstateregset =
+ {
+ NULL,
+ i386_linux_supply_xstateregset,
+ i386_linux_collect_xstateregset
+ };
+
+/* Iterate over core file register note sections. */
+
+static void
+i386_linux_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", 68, &i386_gregset, NULL, cb_data);
+
+ if (tdep->xcr0 & X86_XSTATE_AVX)
+ cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0),
+ &i386_linux_xstateregset, "XSAVE extended state", cb_data);
+ else if (tdep->xcr0 & X86_XSTATE_SSE)
+ cb (".reg-xfp", 512, &i386_fpregset, "extended floating-point",
+ cb_data);
+ else
+ cb (".reg2", 108, &i386_fpregset, NULL, cb_data);
+}
+
+/* Linux kernel shows PC value after the 'int $0x80' instruction even if
+ inferior is still inside the syscall. On next PTRACE_SINGLESTEP it will
+ finish the syscall but PC will not change.
+
+ Some vDSOs contain 'int $0x80; ret' and during stepping out of the syscall
+ i386_displaced_step_fixup would keep PC at the displaced pad location.
+ As PC is pointing to the 'ret' instruction before the step
+ i386_displaced_step_fixup would expect inferior has just executed that 'ret'
+ and PC should not be adjusted. In reality it finished syscall instead and
+ PC should get relocated back to its vDSO address. Hide the 'ret'
+ instruction by 'nop' so that i386_displaced_step_fixup is not confused.
+
+ It is not fully correct as the bytes in struct displaced_step_closure will
+ not match the inferior code. But we would need some new flag in
+ displaced_step_closure otherwise to keep the state that syscall is finishing
+ for the later i386_displaced_step_fixup execution as the syscall execution
+ is already no longer detectable there. The new flag field would mean
+ i386-linux-tdep.c needs to wrap all the displacement methods of i386-tdep.c
+ which does not seem worth it. The same effect is achieved by patching that
+ 'nop' instruction there instead. */
+
+static struct displaced_step_closure *
+i386_linux_displaced_step_copy_insn (struct gdbarch *gdbarch,
+ CORE_ADDR from, CORE_ADDR to,
+ struct regcache *regs)
+{
+ struct displaced_step_closure *closure;
+
+ closure = i386_displaced_step_copy_insn (gdbarch, from, to, regs);
+
+ if (i386_linux_get_syscall_number_from_regcache (regs) != -1)
+ {
+ /* Since we use simple_displaced_step_copy_insn, our closure is a
+ copy of the instruction. */
+ gdb_byte *insn = (gdb_byte *) closure;
+
+ /* Fake nop. */
+ insn[0] = 0x90;
+ }
+
+ return closure;
+}
+
static void
i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const struct target_desc *tdesc = info.target_desc;
+ struct tdesc_arch_data *tdesc_data
+ = (struct tdesc_arch_data *) info.tdep_info;
+ const struct tdesc_feature *feature;
+ int valid_p;
+
+ gdb_assert (tdesc_data);
+
+ linux_init_abi (info, gdbarch);
/* GNU/Linux uses ELF. */
i386_elf_init_abi (info, gdbarch);
- /* Since we have the extra "orig_eax" register on GNU/Linux, we have
- to adjust a few things. */
+ /* Reserve a number for orig_eax. */
+ set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS);
+ if (! tdesc_has_registers (tdesc))
+ tdesc = tdesc_i386_linux;
+ tdep->tdesc = tdesc;
+
+ feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
+ if (feature == NULL)
+ return;
+
+ valid_p = tdesc_numbered_register (feature, tdesc_data,
+ I386_LINUX_ORIG_EAX_REGNUM,
+ "orig_eax");
+ if (!valid_p)
+ return;
+
+ /* Add the %orig_eax register used for syscall restarting. */
set_gdbarch_write_pc (gdbarch, i386_linux_write_pc);
- set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS);
- set_gdbarch_register_name (gdbarch, i386_linux_register_name);
- set_gdbarch_register_reggroup_p (gdbarch, i386_linux_register_reggroup_p);
+
+ tdep->register_reggroup_p = i386_linux_register_reggroup_p;
tdep->gregset_reg_offset = i386_linux_gregset_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386_linux_gregset_reg_offset);
@@ -431,6 +866,177 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tdep->sc_reg_offset = i386_linux_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386_linux_sc_reg_offset);
+ tdep->xsave_xcr0_offset = I386_LINUX_XSAVE_XCR0_OFFSET;
+
+ set_gdbarch_process_record (gdbarch, i386_process_record);
+ set_gdbarch_process_record_signal (gdbarch, i386_linux_record_signal);
+
+ /* Initialize the i386_linux_record_tdep. */
+ /* These values are the size of the type that will be used in a system
+ call. They are obtained from Linux Kernel source. */
+ i386_linux_record_tdep.size_pointer
+ = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
+ i386_linux_record_tdep.size__old_kernel_stat = 32;
+ i386_linux_record_tdep.size_tms = 16;
+ i386_linux_record_tdep.size_loff_t = 8;
+ i386_linux_record_tdep.size_flock = 16;
+ i386_linux_record_tdep.size_oldold_utsname = 45;
+ i386_linux_record_tdep.size_ustat = 20;
+ i386_linux_record_tdep.size_old_sigaction = 16;
+ i386_linux_record_tdep.size_old_sigset_t = 4;
+ i386_linux_record_tdep.size_rlimit = 8;
+ i386_linux_record_tdep.size_rusage = 72;
+ i386_linux_record_tdep.size_timeval = 8;
+ i386_linux_record_tdep.size_timezone = 8;
+ i386_linux_record_tdep.size_old_gid_t = 2;
+ i386_linux_record_tdep.size_old_uid_t = 2;
+ i386_linux_record_tdep.size_fd_set = 128;
+ i386_linux_record_tdep.size_old_dirent = 268;
+ i386_linux_record_tdep.size_statfs = 64;
+ i386_linux_record_tdep.size_statfs64 = 84;
+ i386_linux_record_tdep.size_sockaddr = 16;
+ i386_linux_record_tdep.size_int
+ = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
+ i386_linux_record_tdep.size_long
+ = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+ i386_linux_record_tdep.size_ulong
+ = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+ i386_linux_record_tdep.size_msghdr = 28;
+ i386_linux_record_tdep.size_itimerval = 16;
+ i386_linux_record_tdep.size_stat = 88;
+ i386_linux_record_tdep.size_old_utsname = 325;
+ i386_linux_record_tdep.size_sysinfo = 64;
+ i386_linux_record_tdep.size_msqid_ds = 88;
+ i386_linux_record_tdep.size_shmid_ds = 84;
+ i386_linux_record_tdep.size_new_utsname = 390;
+ i386_linux_record_tdep.size_timex = 128;
+ i386_linux_record_tdep.size_mem_dqinfo = 24;
+ i386_linux_record_tdep.size_if_dqblk = 68;
+ i386_linux_record_tdep.size_fs_quota_stat = 68;
+ i386_linux_record_tdep.size_timespec = 8;
+ i386_linux_record_tdep.size_pollfd = 8;
+ i386_linux_record_tdep.size_NFS_FHSIZE = 32;
+ i386_linux_record_tdep.size_knfsd_fh = 132;
+ i386_linux_record_tdep.size_TASK_COMM_LEN = 16;
+ i386_linux_record_tdep.size_sigaction = 20;
+ i386_linux_record_tdep.size_sigset_t = 8;
+ i386_linux_record_tdep.size_siginfo_t = 128;
+ i386_linux_record_tdep.size_cap_user_data_t = 12;
+ i386_linux_record_tdep.size_stack_t = 12;
+ i386_linux_record_tdep.size_off_t = i386_linux_record_tdep.size_long;
+ i386_linux_record_tdep.size_stat64 = 96;
+ i386_linux_record_tdep.size_gid_t = 4;
+ i386_linux_record_tdep.size_uid_t = 4;
+ i386_linux_record_tdep.size_PAGE_SIZE = 4096;
+ i386_linux_record_tdep.size_flock64 = 24;
+ i386_linux_record_tdep.size_user_desc = 16;
+ i386_linux_record_tdep.size_io_event = 32;
+ i386_linux_record_tdep.size_iocb = 64;
+ i386_linux_record_tdep.size_epoll_event = 12;
+ i386_linux_record_tdep.size_itimerspec
+ = i386_linux_record_tdep.size_timespec * 2;
+ i386_linux_record_tdep.size_mq_attr = 32;
+ i386_linux_record_tdep.size_termios = 36;
+ i386_linux_record_tdep.size_termios2 = 44;
+ i386_linux_record_tdep.size_pid_t = 4;
+ i386_linux_record_tdep.size_winsize = 8;
+ i386_linux_record_tdep.size_serial_struct = 60;
+ i386_linux_record_tdep.size_serial_icounter_struct = 80;
+ i386_linux_record_tdep.size_hayes_esp_config = 12;
+ i386_linux_record_tdep.size_size_t = 4;
+ i386_linux_record_tdep.size_iovec = 8;
+ i386_linux_record_tdep.size_time_t = 4;
+
+ /* These values are the second argument of system call "sys_ioctl".
+ They are obtained from Linux Kernel source. */
+ i386_linux_record_tdep.ioctl_TCGETS = 0x5401;
+ i386_linux_record_tdep.ioctl_TCSETS = 0x5402;
+ i386_linux_record_tdep.ioctl_TCSETSW = 0x5403;
+ i386_linux_record_tdep.ioctl_TCSETSF = 0x5404;
+ i386_linux_record_tdep.ioctl_TCGETA = 0x5405;
+ i386_linux_record_tdep.ioctl_TCSETA = 0x5406;
+ i386_linux_record_tdep.ioctl_TCSETAW = 0x5407;
+ i386_linux_record_tdep.ioctl_TCSETAF = 0x5408;
+ i386_linux_record_tdep.ioctl_TCSBRK = 0x5409;
+ i386_linux_record_tdep.ioctl_TCXONC = 0x540A;
+ i386_linux_record_tdep.ioctl_TCFLSH = 0x540B;
+ i386_linux_record_tdep.ioctl_TIOCEXCL = 0x540C;
+ i386_linux_record_tdep.ioctl_TIOCNXCL = 0x540D;
+ i386_linux_record_tdep.ioctl_TIOCSCTTY = 0x540E;
+ i386_linux_record_tdep.ioctl_TIOCGPGRP = 0x540F;
+ i386_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
+ i386_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
+ i386_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
+ i386_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
+ i386_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
+ i386_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
+ i386_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
+ i386_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
+ i386_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
+ i386_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
+ i386_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541A;
+ i386_linux_record_tdep.ioctl_FIONREAD = 0x541B;
+ i386_linux_record_tdep.ioctl_TIOCINQ = i386_linux_record_tdep.ioctl_FIONREAD;
+ i386_linux_record_tdep.ioctl_TIOCLINUX = 0x541C;
+ i386_linux_record_tdep.ioctl_TIOCCONS = 0x541D;
+ i386_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541E;
+ i386_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541F;
+ i386_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
+ i386_linux_record_tdep.ioctl_FIONBIO = 0x5421;
+ i386_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
+ i386_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
+ i386_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
+ i386_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
+ i386_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
+ i386_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
+ i386_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
+ i386_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
+ i386_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
+ i386_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
+ i386_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
+ i386_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
+ i386_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
+ i386_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
+ i386_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
+ i386_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
+ i386_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
+ i386_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
+ i386_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
+ i386_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
+ i386_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
+ i386_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
+ i386_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
+ i386_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
+ i386_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545A;
+ i386_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545B;
+ i386_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545C;
+ i386_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545D;
+ i386_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545E;
+ i386_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545F;
+ i386_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;
+
+ /* These values are the second argument of system call "sys_fcntl"
+ and "sys_fcntl64". They are obtained from Linux Kernel source. */
+ i386_linux_record_tdep.fcntl_F_GETLK = 5;
+ i386_linux_record_tdep.fcntl_F_GETLK64 = 12;
+ i386_linux_record_tdep.fcntl_F_SETLK64 = 13;
+ i386_linux_record_tdep.fcntl_F_SETLKW64 = 14;
+
+ i386_linux_record_tdep.arg1 = I386_EBX_REGNUM;
+ i386_linux_record_tdep.arg2 = I386_ECX_REGNUM;
+ i386_linux_record_tdep.arg3 = I386_EDX_REGNUM;
+ i386_linux_record_tdep.arg4 = I386_ESI_REGNUM;
+ i386_linux_record_tdep.arg5 = I386_EDI_REGNUM;
+ i386_linux_record_tdep.arg6 = I386_EBP_REGNUM;
+
+ tdep->i386_intx80_record = i386_linux_intx80_sysenter_syscall_record;
+ tdep->i386_sysenter_record = i386_linux_intx80_sysenter_syscall_record;
+ tdep->i386_syscall_record = i386_linux_intx80_sysenter_syscall_record;
+
+ /* N_FUN symbols in shared libaries have 0 for their values and need
+ to be relocated. */
+ set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);
+
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
@@ -444,6 +1050,30 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ /* Core file support. */
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, i386_linux_iterate_over_regset_sections);
+ set_gdbarch_core_read_description (gdbarch,
+ i386_linux_core_read_description);
+
+ /* Displaced stepping. */
+ set_gdbarch_displaced_step_copy_insn (gdbarch,
+ i386_linux_displaced_step_copy_insn);
+ set_gdbarch_displaced_step_fixup (gdbarch, i386_displaced_step_fixup);
+ set_gdbarch_displaced_step_free_closure (gdbarch,
+ simple_displaced_step_free_closure);
+ set_gdbarch_displaced_step_location (gdbarch,
+ linux_displaced_step_location);
+
+ /* Functions for 'catch syscall'. */
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_I386);
+ set_gdbarch_get_syscall_number (gdbarch,
+ i386_linux_get_syscall_number);
+
+ set_gdbarch_get_siginfo_type (gdbarch, x86_linux_get_siginfo_type);
+ set_gdbarch_handle_segmentation_fault (gdbarch,
+ i386_linux_handle_segmentation_fault);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
@@ -454,4 +1084,12 @@ _initialize_i386_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUX,
i386_linux_init_abi);
+
+ /* Initialize the Linux target description. */
+ initialize_tdesc_i386_linux ();
+ initialize_tdesc_i386_mmx_linux ();
+ initialize_tdesc_i386_avx_linux ();
+ initialize_tdesc_i386_mpx_linux ();
+ initialize_tdesc_i386_avx_mpx_linux ();
+ initialize_tdesc_i386_avx512_linux ();
}