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2004-04-23 Randolph Chung <tausq@debian.org>

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* hppa-tdep.c (hppa_stub_unwind_cache, hppa_stub_frame_unwind_cache)
	(hppa_stub_frame_this_id, hppa_stub_frame_prev_register)
	(hppa_stub_frame_unwind, hppa_stub_unwind_sniffer): New stub unwinder
	for handling stackless frames.
	(hppa_gdbarch_init): Link in hppa_stub_unwind_sniffer.
This commit is contained in:
Randolph Chung
2004-04-24 06:13:32 +00:00
parent 3e27568fe9
commit 7f07c5b609
2 changed files with 91 additions and 3 deletions
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86
gdb/hppa-tdep.c
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@@ -1898,6 +1898,84 @@ hppa_frame_base_sniffer (struct frame_info *next_frame)
return &hppa_frame_base;
}
/* Stub frames, used for all kinds of call stubs. */
struct hppa_stub_unwind_cache
{
CORE_ADDR base;
struct trad_frame_saved_reg *saved_regs;
};
static struct hppa_stub_unwind_cache *
hppa_stub_frame_unwind_cache (struct frame_info *next_frame,
void **this_cache)
{
struct gdbarch *gdbarch = get_frame_arch (next_frame);
struct hppa_stub_unwind_cache *info;
if (*this_cache)
return *this_cache;
info = FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache);
*this_cache = info;
info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
info->saved_regs[PCOQ_HEAD_REGNUM].realreg = RP_REGNUM;
info->base = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM);
return info;
}
static void
hppa_stub_frame_this_id (struct frame_info *next_frame,
void **this_prologue_cache,
struct frame_id *this_id)
{
struct hppa_stub_unwind_cache *info
= hppa_stub_frame_unwind_cache (next_frame, this_prologue_cache);
*this_id = frame_id_build (info->base, frame_pc_unwind (next_frame));
}
static void
hppa_stub_frame_prev_register (struct frame_info *next_frame,
void **this_prologue_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realnump, void *bufferp)
{
struct hppa_stub_unwind_cache *info
= hppa_stub_frame_unwind_cache (next_frame, this_prologue_cache);
int pcoqt = (regnum == PCOQ_TAIL_REGNUM);
struct gdbarch *gdbarch = get_frame_arch (next_frame);
int regsize = register_size (gdbarch, PCOQ_HEAD_REGNUM);
if (pcoqt)
regnum = PCOQ_HEAD_REGNUM;
trad_frame_prev_register (next_frame, info->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, bufferp);
if (pcoqt)
store_unsigned_integer (bufferp, regsize,
extract_unsigned_integer (bufferp, regsize) + 4);
}
static const struct frame_unwind hppa_stub_frame_unwind = {
NORMAL_FRAME,
hppa_stub_frame_this_id,
hppa_stub_frame_prev_register
};
static const struct frame_unwind *
hppa_stub_unwind_sniffer (struct frame_info *next_frame)
{
CORE_ADDR pc = frame_pc_unwind (next_frame);
if (IN_SOLIB_CALL_TRAMPOLINE (pc, NULL)
|| IN_SOLIB_RETURN_TRAMPOLINE (pc, NULL))
return &hppa_stub_frame_unwind;
return NULL;
}
static struct frame_id
hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
@@ -2267,17 +2345,19 @@ hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
default:
internal_error (__FILE__, __LINE__, "bad switch");
}
set_gdbarch_breakpoint_from_pc (gdbarch, hppa_breakpoint_from_pc);
set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
/* Frame unwind methods. */
set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id);
set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc);
/* Hook in the default unwinders. */
frame_unwind_append_sniffer (gdbarch, hppa_stub_unwind_sniffer);
frame_unwind_append_sniffer (gdbarch, hppa_frame_unwind_sniffer);
frame_base_append_sniffer (gdbarch, hppa_frame_base_sniffer);
set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);