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Support x32 sigtramp 

* amd64-linux-tdep.c (linux_sigtramp_code): Renamed to ...
	(amd64_linux_sigtramp_code): This.
	(amd64_x32_linux_sigtramp_code): New.
	(LINUX_SIGTRAMP_LEN): Updated.
	(amd64_linux_sigtramp_start): Check x32 sigtramp.
This commit is contained in:
H.J. Lu 2012-07-03 14:53:56 +00:00
parent 90c984fc53
commit 1e55e04f56
2 changed files with 26 additions and 3 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2012-07-03 H.J. Lu <hongjiu.lu@intel.com>
* amd64-linux-tdep.c (linux_sigtramp_code): Renamed to ...
(amd64_linux_sigtramp_code): This.
(amd64_x32_linux_sigtramp_code): New.
(LINUX_SIGTRAMP_LEN): Updated.
(amd64_linux_sigtramp_start): Check x32 sigtramp.
2012-07-02 Jan Kratochvil <jan.kratochvil@redhat.com>
* linux-thread-db.c (thread_db_new_objfile): Fix comment typos.

21
gdb/amd64-linux-tdep.c
View File

@ -107,7 +107,7 @@ int amd64_linux_gregset_reg_offset[] =
#define LINUX_SIGTRAMP_INSN1 0x0f /* syscall */
#define LINUX_SIGTRAMP_OFFSET1 7
static const gdb_byte linux_sigtramp_code[] =
static const gdb_byte amd64_linux_sigtramp_code[] =
{
/* mov $__NR_rt_sigreturn, %rax */
LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x0f, 0x00, 0x00, 0x00,
@ -115,7 +115,15 @@ static const gdb_byte linux_sigtramp_code[] =
LINUX_SIGTRAMP_INSN1, 0x05
};
#define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code)
static const gdb_byte amd64_x32_linux_sigtramp_code[] =
{
/* mov $__NR_rt_sigreturn, %rax. */
LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x01, 0x02, 0x00, 0x40,
/* syscall */
LINUX_SIGTRAMP_INSN1, 0x05
};
#define LINUX_SIGTRAMP_LEN (sizeof amd64_linux_sigtramp_code)
/* If PC is in a sigtramp routine, return the address of the start of
the routine. Otherwise, return 0. */
@ -123,6 +131,8 @@ static const gdb_byte linux_sigtramp_code[] =
static CORE_ADDR
amd64_linux_sigtramp_start (struct frame_info *this_frame)
{
struct gdbarch *gdbarch;
const gdb_byte *sigtramp_code;
CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[LINUX_SIGTRAMP_LEN];
@ -146,7 +156,12 @@ amd64_linux_sigtramp_start (struct frame_info *this_frame)
return 0;
}
if (memcmp (buf, linux_sigtramp_code, LINUX_SIGTRAMP_LEN) != 0)
gdbarch = get_frame_arch (this_frame);
if (gdbarch_ptr_bit (gdbarch) == 32)
sigtramp_code = amd64_x32_linux_sigtramp_code;
else
sigtramp_code = amd64_linux_sigtramp_code;
if (memcmp (buf, sigtramp_code, LINUX_SIGTRAMP_LEN) != 0)
return 0;
return pc;