/* Target-dependent code for GNU/Linux x86-64.
- Copyright 2001, 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
This file is part of GDB.
Boston, MA 02111-1307, USA. */
#include "defs.h"
-#include "inferior.h"
+#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
#include "osabi.h"
+#include "symtab.h"
#include "gdb_string.h"
#include "amd64-tdep.h"
-#include "amd64-linux-tdep.h"
-
-/* Register indexes to 'struct user' come from <sys/reg.h>. */
-
-#define USER_R15 0
-#define USER_R14 1
-#define USER_R13 2
-#define USER_R12 3
-#define USER_RBP 4
-#define USER_RBX 5
-#define USER_R11 6
-#define USER_R10 7
-#define USER_R9 8
-#define USER_R8 9
-#define USER_RAX 10
-#define USER_RCX 11
-#define USER_RDX 12
-#define USER_RSI 13
-#define USER_RDI 14
-#define USER_RIP 16
-#define USER_CS 17
-#define USER_EFLAGS 18
-#define USER_RSP 19
-#define USER_SS 20
-#define USER_DS 23
-#define USER_ES 24
-#define USER_FS 25
-#define USER_GS 26
+#include "solib-svr4.h"
/* Mapping between the general-purpose registers in `struct user'
- format and GDB's register array layout. */
+ format and GDB's register cache layout. */
-static int user_to_gdb_regmap[] =
+/* From <sys/reg.h>. */
+static int amd64_linux_gregset_reg_offset[] =
{
- USER_RAX, USER_RBX, USER_RCX, USER_RDX,
- USER_RSI, USER_RDI, USER_RBP, USER_RSP,
- USER_R8, USER_R9, USER_R10, USER_R11,
- USER_R12, USER_R13, USER_R14, USER_R15,
- USER_RIP, USER_EFLAGS,
- USER_CS, USER_SS,
- USER_DS, USER_ES, USER_FS, USER_GS
+ 10 * 8, /* %rax */
+ 5 * 8, /* %rbx */
+ 11 * 8, /* %rcx */
+ 12 * 8, /* %rdx */
+ 13 * 8, /* %rsi */
+ 14 * 8, /* %rdi */
+ 4 * 8, /* %rbp */
+ 19 * 8, /* %rsp */
+ 9 * 8, /* %r8 ... */
+ 8 * 8,
+ 7 * 8,
+ 6 * 8,
+ 3 * 8,
+ 2 * 8,
+ 1 * 8,
+ 0 * 8, /* ... %r15 */
+ 16 * 8, /* %rip */
+ 18 * 8, /* %eflags */
+ 17 * 8, /* %cs */
+ 20 * 8, /* %ss */
+ 23 * 8, /* %ds */
+ 24 * 8, /* %es */
+ 25 * 8, /* %fs */
+ 26 * 8 /* %gs */
};
+\f
-/* Fill GDB's register array with the general-purpose register values
- in *GREGSETP. */
-
-void
-amd64_linux_supply_gregset (char *regp)
-{
- int i;
-
- for (i = 0; i < AMD64_NUM_GREGS; i++)
- supply_register (i, regp + (user_to_gdb_regmap[i] * 8));
-}
-
-/* Fill register REGNO (if it is a general-purpose register) in
- *GREGSETPS with the value in GDB's register array. If REGNO is -1,
- do this for all registers. */
-
-void
-amd64_linux_fill_gregset (char *regp, int regno)
-{
- int i;
-
- for (i = 0; i < AMD64_NUM_GREGS; i++)
- if (regno == -1 || regno == i)
- regcache_collect (i, regp + (user_to_gdb_regmap[i] * 8));
-}
-
-/* The register sets used in GNU/Linux ELF core-dumps are identical to
- the register sets used by `ptrace'. The corresponding types are
- `elf_gregset_t' for the general-purpose registers (with
- `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
- for the floating-point registers. */
-
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR ignore)
-{
- switch (which)
- {
- case 0: /* Integer registers. */
- if (core_reg_size != 216)
- warning ("Wrong size register set in core file.");
- else
- amd64_linux_supply_gregset (core_reg_sect);
- break;
-
- case 2: /* Floating point registers. */
- case 3: /* "Extended" floating point registers. This is gdb-speak
- for SSE/SSE2. */
- if (core_reg_size != 512)
- warning ("Wrong size XMM register set in core file.");
- else
- amd64_supply_fxsave (current_regcache, -1, core_reg_sect);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
-}
-
-static struct core_fns amd64_core_fns =
-{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
+/* Support for signal handlers. */
#define LINUX_SIGTRAMP_INSN0 0x48 /* mov $NNNNNNNN, %rax */
#define LINUX_SIGTRAMP_OFFSET0 0
the routine. Otherwise, return 0. */
static CORE_ADDR
-amd64_linux_sigtramp_start (CORE_ADDR pc)
+amd64_linux_sigtramp_start (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
unsigned char buf[LINUX_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
PC is not at the start of the instruction sequence, there will be
a few trailing readable bytes on the stack. */
- if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, sizeof buf))
return 0;
if (buf[0] != LINUX_SIGTRAMP_INSN0)
return 0;
pc -= LINUX_SIGTRAMP_OFFSET1;
-
- if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, sizeof buf))
return 0;
}
return pc;
}
-/* Return whether PC is in a GNU/Linux sigtramp routine. */
+/* Return whether the frame preceding NEXT_FRAME corresponds to a
+ GNU/Linux sigtramp routine. */
static int
-amd64_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
+amd64_linux_sigtramp_p (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+
/* If we have NAME, we can optimize the search. The trampoline is
named __restore_rt. However, it isn't dynamically exported from
the shared C library, so the trampoline may appear to be part of
__sigaction, or __libc_sigaction (all aliases to the same
function). */
if (name == NULL || strstr (name, "sigaction") != NULL)
- return (amd64_linux_sigtramp_start (pc) != 0);
+ return (amd64_linux_sigtramp_start (next_frame) != 0);
return (strcmp ("__restore_rt", name) == 0);
}
amd64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- amd64_init_abi (info, gdbarch);
- set_gdbarch_pc_in_sigtramp (gdbarch, amd64_linux_pc_in_sigtramp);
+ tdep->gregset_reg_offset = amd64_linux_gregset_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (amd64_linux_gregset_reg_offset);
+ tdep->sizeof_gregset = 27 * 8;
+
+ amd64_init_abi (info, gdbarch);
+ tdep->sigtramp_p = amd64_linux_sigtramp_p;
tdep->sigcontext_addr = amd64_linux_sigcontext_addr;
tdep->sc_reg_offset = amd64_linux_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (amd64_linux_sc_reg_offset);
+
+ /* GNU/Linux uses SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
}
\f
void
_initialize_amd64_linux_tdep (void)
{
- add_core_fns (&amd64_core_fns);
-
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
GDB_OSABI_LINUX, amd64_linux_init_abi);
}
projects / deliverable / binutils-gdb.git / blobdiff