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2004-07-20 Andrew Cagney <cagney@gnu.org>

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* tramp-frame.h (struct tramp_frame): Change "insn" to a struct
	containing both bytes and mask.  Add "frame_type".
	* tramp-frame.c (tramp_frame_start): Update.
	(tramp_frame_prepend_unwinder): Update.
	* mips-linux-tdep.c (mips_linux_o32_sigframe)
	(mips_linux_o32_rt_sigframe, mips_linux_n32_rt_sigframe)
	(mips_linux_n64_rt_sigframe): Update.  Make "static const".
	* ppcnbsd-tdep.c (tramp_frame ppcnbsd_sigtramp): Update.
This commit is contained in:
Andrew Cagney 2004-07-20 15:11:37 +00:00
parent e12904d27f
commit 2cd8546d13
5 changed files with 63 additions and 26 deletions
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11
gdb/ChangeLog
View file

@ -1,3 +1,14 @@
2004-07-20 Andrew Cagney <cagney@gnu.org>
* tramp-frame.h (struct tramp_frame): Change "insn" to a struct
containing both bytes and mask. Add "frame_type".
* tramp-frame.c (tramp_frame_start): Update.
(tramp_frame_prepend_unwinder): Update.
* mips-linux-tdep.c (mips_linux_o32_sigframe)
(mips_linux_o32_rt_sigframe, mips_linux_n32_rt_sigframe)
(mips_linux_n64_rt_sigframe): Update. Make "static const".
* ppcnbsd-tdep.c (tramp_frame ppcnbsd_sigtramp): Update.
2004-07-19 Eli Zaretskii <eliz@gnu.org>
* config/djgpp/fnchange.lst: Add remapping for bfd/elf32-cr*.c,

29
gdb/mips-linux-tdep.c
View file

@ -830,25 +830,40 @@ static void mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
#define MIPS_INST_LI_V0_N32_RT_SIGRETURN 0x24020000 + MIPS_NR_N32_rt_sigreturn
#define MIPS_INST_SYSCALL 0x0000000c
struct tramp_frame mips_linux_o32_sigframe = {
static const struct tramp_frame mips_linux_o32_sigframe = {
SIGTRAMP_FRAME,
4,
{ MIPS_INST_LI_V0_SIGRETURN, MIPS_INST_SYSCALL, TRAMP_SENTINEL_INSN },
{
{ MIPS_INST_LI_V0_SIGRETURN, -1 },
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 }
},
mips_linux_o32_sigframe_init
};
struct tramp_frame mips_linux_o32_rt_sigframe = {
static const struct tramp_frame mips_linux_o32_rt_sigframe = {
SIGTRAMP_FRAME,
4,
{ MIPS_INST_LI_V0_RT_SIGRETURN, MIPS_INST_SYSCALL, TRAMP_SENTINEL_INSN },
{
{ MIPS_INST_LI_V0_RT_SIGRETURN, -1 },
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 } },
mips_linux_o32_sigframe_init
};
struct tramp_frame mips_linux_n32_rt_sigframe = {
static const struct tramp_frame mips_linux_n32_rt_sigframe = {
SIGTRAMP_FRAME,
4,
{ MIPS_INST_LI_V0_N32_RT_SIGRETURN, MIPS_INST_SYSCALL, TRAMP_SENTINEL_INSN },
{
{ MIPS_INST_LI_V0_N32_RT_SIGRETURN, -1 },
{ MIPS_INST_SYSCALL, -1 },
{ TRAMP_SENTINEL_INSN, -1 }
},
mips_linux_n32n64_sigframe_init
};
struct tramp_frame mips_linux_n64_rt_sigframe = {
static const struct tramp_frame mips_linux_n64_rt_sigframe = {
SIGTRAMP_FRAME,
4,
{ MIPS_INST_LI_V0_N64_RT_SIGRETURN, MIPS_INST_SYSCALL, TRAMP_SENTINEL_INSN },
mips_linux_n32n64_sigframe_init

13
gdb/ppcnbsd-tdep.c
View file

@ -293,14 +293,15 @@ ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self,
instruction, or zero if it isn't a signal trampoline. */
static const struct tramp_frame ppcnbsd_sigtramp = {
SIGTRAMP_FRAME,
4, /* insn size */
{ /* insn */
0x38610018, /* addi r3,r1,24 */
0x38000127, /* li r0,295 */
0x44000002, /* sc */
0x38000001, /* li r0,1 */
0x44000002, /* sc */
TRAMP_SENTINEL_INSN
{ 0x38610018, -1 }, /* addi r3,r1,24 */
{ 0x38000127, -1 }, /* li r0,295 */
{ 0x44000002, -1 }, /* sc */
{ 0x38000001, -1 }, /* li r0,1 */
{ 0x44000002, -1 }, /* sc */
{ TRAMP_SENTINEL_INSN, -1 }
},
ppcnbsd_sigtramp_cache_init
};

10
gdb/tramp-frame.c
View file

@ -91,7 +91,7 @@ tramp_frame_start (const struct tramp_frame *tramp,
int ti;
/* Search through the trampoline for one that matches the
instruction sequence around PC. */
for (ti = 0; tramp->insn[ti] != TRAMP_SENTINEL_INSN; ti++)
for (ti = 0; tramp->insn[ti].bytes != TRAMP_SENTINEL_INSN; ti++)
{
CORE_ADDR func = pc - tramp->insn_size * ti;
int i;
@ -99,14 +99,14 @@ tramp_frame_start (const struct tramp_frame *tramp,
{
bfd_byte buf[sizeof (tramp->insn[0])];
ULONGEST insn;
if (tramp->insn[i] == TRAMP_SENTINEL_INSN)
if (tramp->insn[i].bytes == TRAMP_SENTINEL_INSN)
return func;
if (!safe_frame_unwind_memory (next_frame,
func + i * tramp->insn_size,
buf, tramp->insn_size))
break;
insn = extract_unsigned_integer (buf, tramp->insn_size);
if (tramp->insn[i] != insn)
if (tramp->insn[i].bytes != (insn & tramp->insn[i].mask))
break;
}
}
@ -156,11 +156,11 @@ tramp_frame_prepend_unwinder (struct gdbarch *gdbarch,
/* Check that the instruction sequence contains a sentinel. */
for (i = 0; i < ARRAY_SIZE (tramp_frame->insn); i++)
{
if (tramp_frame->insn[i] == TRAMP_SENTINEL_INSN)
if (tramp_frame->insn[i].bytes == TRAMP_SENTINEL_INSN)
break;
}
gdb_assert (i < ARRAY_SIZE (tramp_frame->insn));
gdb_assert (tramp_frame->insn_size <= sizeof (tramp_frame->insn[0]));
gdb_assert (tramp_frame->insn_size <= sizeof (tramp_frame->insn[0].bytes));
data = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_data);
unwinder = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind);

26
gdb/tramp-frame.h
View file

@ -22,6 +22,8 @@
#ifndef TRAMP_FRAME_H
#define TRAMP_FRAME_H
#include "frame.h" /* For "enum frame_type". */
struct trad_frame;
struct frame_info;
struct trad_frame_cache;
@ -45,16 +47,24 @@ struct trad_frame_cache;
struct tramp_frame
{
/* The trampoline's entire instruction sequence. Search for this in
the inferior at or around the frame's PC. It is assumed that the
PC is INSN_SIZE aligned, and that each element of TRAMP contains
one INSN_SIZE instruction. It is also assumed that TRAMP[0]
contains the first instruction of the trampoline and hence the
address of the instruction matching TRAMP[0] is the trampoline's
"func" address. The instruction sequence shall be terminated by
/* The trampoline's type, some a signal trampolines, some are normal
call-frame trampolines (aka thunks). */
enum frame_type frame_type;
/* The trampoline's entire instruction sequence. It consists of a
bytes/mask pair. Search for this in the inferior at or around
the frame's PC. It is assumed that the PC is INSN_SIZE aligned,
and that each element of TRAMP contains one INSN_SIZE
instruction. It is also assumed that INSN[0] contains the first
instruction of the trampoline and hence the address of the
instruction matching INSN[0] is the trampoline's "func" address.
The instruction sequence is terminated by
TRAMP_SENTINEL_INSN. */
int insn_size;
ULONGEST insn[8];
struct
{
ULONGEST bytes;
ULONGEST mask;
} insn[8];
/* Initialize a trad-frame cache corresponding to the tramp-frame.
FUNC is the address of the instruction TRAMP[0] in memory. */
void (*init) (const struct tramp_frame *self,