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* tramp-frame.h (struct tramp_frame): Allow for 16 instructions

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instead of 8.
* m68kbsd-tdep.c: Include "frame.h", "trad-frame.h" and
"tramp-frame.h".
(m68kobsd_sigtramp_cache_init): New function.
(m68kbsd_aout_init_abi): Prepend m68kobsd_sigtramp unwinder.
This commit is contained in:
Mark Kettenis 2005-08-08 20:59:19 +00:00
parent 44c86e8c6d
commit 059cb7d23e
3 changed files with 73 additions and 3 deletions
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9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
2005-08-08 Mark Kettenis <kettenis@gnu.org>
* tramp-frame.h (struct tramp_frame): Allow for 16 instructions
instead of 8.
* m68kbsd-tdep.c: Include "frame.h", "trad-frame.h" and
"tramp-frame.h".
(m68kobsd_sigtramp_cache_init): New function.
(m68kbsd_aout_init_abi): Prepend m68kobsd_sigtramp unwinder.
2005-08-02 Fred Fish <fnf@specifix.com>
* defs.h (parse_frame_specification): Remove prototype.

7
gdb/Makefile.in
View File

@ -2218,9 +2218,10 @@ m68hc11-tdep.o: m68hc11-tdep.c $(defs_h) $(frame_h) $(frame_unwind_h) \
m68kbsd-nat.o: m68kbsd-nat.c $(defs_h) $(gdbcore_h) $(inferior_h) \
$(regcache_h) $(gdb_assert_h) $(m68k_tdep_h) $(inf_ptrace_h) \
$(bsd_kvm_h)
m68kbsd-tdep.o: m68kbsd-tdep.c $(defs_h) $(arch_utils_h) $(osabi_h) \
$(regcache_h) $(regset_h) $(gdb_assert_h) $(gdb_string_h) \
$(m68k_tdep_h) $(solib_svr4_h)
m68kbsd-tdep.o: m68kbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
$(osabi_h) $(regcache_h) $(regset_h) $(trad_frame_h) \
$(tramp_frame_h)$(gdb_assert_h) $(gdb_string_h) $(m68k_tdep_h) \
$(solib_svr4_h)
m68klinux-nat.o: m68klinux-nat.c $(defs_h) $(frame_h) $(inferior_h) \
$(language_h) $(gdbcore_h) $(gdb_string_h) $(regcache_h) \
$(m68k_tdep_h) $(gdb_stat_h) $(floatformat_h) $(target_h) \

60
gdb/m68kbsd-tdep.c
View File

@ -21,9 +21,12 @@
#include "defs.h"
#include "arch-utils.h"
#include "frame.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "gdb_assert.h"
#include "gdb_string.h"
@ -126,6 +129,61 @@ m68kbsd_regset_from_core_section (struct gdbarch *gdbarch,
return NULL;
}
/* Signal trampolines. */
static void
m68kobsd_sigtramp_cache_init (const struct tramp_frame *self,
struct frame_info *next_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
CORE_ADDR addr, base, pc;
int regnum;
base = frame_unwind_register_unsigned (next_frame, M68K_SP_REGNUM);
/* The 'addql #4,%sp' instruction at offset 8 adjusts the stack
pointer. Adjust the frame base accordingly. */
pc = frame_unwind_register_unsigned (next_frame, M68K_PC_REGNUM);
if ((pc - func) > 8)
base -= 4;
/* Get frame pointer, stack pointer, program counter and processor
state from `struct sigcontext'. */
addr = get_frame_memory_unsigned (next_frame, base + 8, 4);
trad_frame_set_reg_addr (this_cache, M68K_FP_REGNUM, addr + 8);
trad_frame_set_reg_addr (this_cache, M68K_SP_REGNUM, addr + 12);
trad_frame_set_reg_addr (this_cache, M68K_PC_REGNUM, addr + 20);
trad_frame_set_reg_addr (this_cache, M68K_PS_REGNUM, addr + 24);
/* The sc_ap member of `struct sigcontext' points to additional
hardware state. Here we find the missing registers. */
addr = get_frame_memory_unsigned (next_frame, addr + 16, 4) + 4;
for (regnum = M68K_D0_REGNUM; regnum < M68K_FP_REGNUM; regnum++, addr += 4)
trad_frame_set_reg_addr (this_cache, regnum, addr);
/* Construct the frame ID using the function start. */
trad_frame_set_id (this_cache, frame_id_build (base, func));
}
static const struct tramp_frame m68kobsd_sigtramp = {
SIGTRAMP_FRAME,
2,
{
{ 0x206f, -1 }, { 0x000c, -1}, /* moveal %sp@(12),%a0 */
{ 0x4e90, -1 }, /* jsr %a0@ */
{ 0x588f, -1 }, /* addql #4,%sp */
{ 0x4e41, -1 }, /* trap #1 */
{ 0x2f40, -1 }, { 0x0004, -1 }, /* moveal %d0,%sp@(4) */
{ 0x7001, -1 }, /* moveq #SYS_exit,%d0 */
{ 0x4e40, -1 }, /* trap #0 */
{ TRAMP_SENTINEL_INSN, -1 }
},
m68kobsd_sigtramp_cache_init
};
static void
m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@ -149,6 +207,8 @@ m68kbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
m68kbsd_init_abi (info, gdbarch);
tdep->struct_return = reg_struct_return;
tramp_frame_prepend_unwinder (gdbarch, &m68kobsd_sigtramp);
}
/* NetBSD ELF. */