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2004-04-08 Andrew Cagney <cagney@redhat.com> 

* frame-unwind.c (struct frame_unwind_table, frame_unwind_init)
	(frame_unwind_prepend_unwinder, frame_unwind_append_sniffer)
	(frame_unwind_find_by_frame): Re-implement the unwind code so
	that it can both prepend and append sniffers.  Replace
	frame_unwind_register_unwinder with frame_unwind_prepend_unwinder.
	* tramp-frame.c (tramp_frame_append): Use
	frame_unwind_prepend_unwinder.
	* frame-unwind.h (frame_unwind_prepend_unwinder): Replace
	frame_unwind_register_unwinder.
	* tramp-frame.h (tramp_frame_prepend_unwinder): Rename
	tramp_frame_append.
	* tramp-frame.c (tramp_frame_prepend_unwinder): Update.
	* mips-linux-tdep.c (mips_linux_init_abi, mips_linux_init_abi)
	(mips_linux_init_abi): Update.
This commit is contained in:
Andrew Cagney 2004-04-08 20:03:52 +00:00
parent 67faf00763
commit fb2be677dc
6 changed files with 58 additions and 28 deletions
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17
gdb/ChangeLog
View File

@ -1,3 +1,20 @@
2004-04-08 Andrew Cagney <cagney@redhat.com>
* frame-unwind.c (struct frame_unwind_table, frame_unwind_init)
(frame_unwind_prepend_unwinder, frame_unwind_append_sniffer)
(frame_unwind_find_by_frame): Re-implement the unwind code so
that it can both prepend and append sniffers. Replace
frame_unwind_register_unwinder with frame_unwind_prepend_unwinder.
* tramp-frame.c (tramp_frame_append): Use
frame_unwind_prepend_unwinder.
* frame-unwind.h (frame_unwind_prepend_unwinder): Replace
frame_unwind_register_unwinder.
* tramp-frame.h (tramp_frame_prepend_unwinder): Rename
tramp_frame_append.
* tramp-frame.c (tramp_frame_prepend_unwinder): Update.
* mips-linux-tdep.c (mips_linux_init_abi, mips_linux_init_abi)
(mips_linux_init_abi): Update.
2004-04-08 Kevin Buettner <kevinb@redhat.com>
* ppc-linux-tdep.c (ELF_NREG, ELF_NFPREG, ELF_NVRREG)

38
gdb/frame-unwind.c
View File

@ -37,8 +37,9 @@ struct frame_unwind_table_entry
struct frame_unwind_table
{
struct frame_unwind_table_entry *head;
struct frame_unwind_table_entry **tail;
struct frame_unwind_table_entry *list;
/* The head of the OSABI part of the search list. */
struct frame_unwind_table_entry **osabi_head;
};
static void *
@ -46,9 +47,12 @@ frame_unwind_init (struct obstack *obstack)
{
struct frame_unwind_table *table
= OBSTACK_ZALLOC (obstack, struct frame_unwind_table);
table->head = OBSTACK_ZALLOC (obstack, struct frame_unwind_table_entry);
table->head->sniffer = dummy_frame_sniffer;
table->tail = &table->head->next;
/* Start the table out with a few default sniffers. OSABI code
can't override this. */
table->list = OBSTACK_ZALLOC (obstack, struct frame_unwind_table_entry);
table->list->sniffer = dummy_frame_sniffer;
/* The insertion point for OSABI sniffers. */
table->osabi_head = &table->list->next;
return table;
}
@ -57,20 +61,26 @@ frame_unwind_append_sniffer (struct gdbarch *gdbarch,
frame_unwind_sniffer_ftype *sniffer)
{
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
(*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
(*table->tail)->sniffer = sniffer;
table->tail = &((*table->tail)->next);
struct frame_unwind_table_entry **ip;
/* Find the end of the list and insert the new entry there. */
for (ip = table->osabi_head; (*ip) != NULL; ip = &(*ip)->next);
(*ip) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
(*ip)->sniffer = sniffer;
}
void
frame_unwind_register_unwinder (struct gdbarch *gdbarch,
frame_unwind_prepend_unwinder (struct gdbarch *gdbarch,
const struct frame_unwind *unwinder)
{
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
(*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch,
struct frame_unwind_table_entry);
(*table->tail)->unwinder = unwinder;
table->tail = &((*table->tail)->next);
struct frame_unwind_table_entry *entry;
/* Insert the new entry at the start of the list. */
entry = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
entry->unwinder = unwinder;
entry->next = (*table->osabi_head);
(*table->osabi_head) = entry;
}
const struct frame_unwind *
@ -80,7 +90,7 @@ frame_unwind_find_by_frame (struct frame_info *next_frame, void **this_cache)
struct gdbarch *gdbarch = get_frame_arch (next_frame);
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
struct frame_unwind_table_entry *entry;
for (entry = table->head; entry != NULL; entry = entry->next)
for (entry = table->list; entry != NULL; entry = entry->next)
{
if (entry->sniffer != NULL)
{

13
gdb/frame-unwind.h
View File

@ -131,11 +131,14 @@ struct frame_unwind
frame_sniffer_ftype *sniffer;
};
/* Register a frame unwinder, _appending_ it to the end of the search
list. */
extern void frame_unwind_register_unwinder (struct gdbarch *gdbarch,
const struct frame_unwind *unwinder);
/* Register a frame unwinder, _prepending_ it to the front of the
search list (so it is sniffed before previously registered
unwinders). By using a prepend, later calls can install unwinders
that override earlier calls. This allows, for instance, an OSABI
to install a a more specific sigtramp unwinder that overrides the
traditional brute-force unwinder. */
extern void frame_unwind_prepend_unwinder (struct gdbarch *gdbarch,
const struct frame_unwind *unwinder);
/* Given the NEXT frame, take a wiff of THIS frame's registers (namely
the PC and attributes) and if it is the applicable unwinder return

8
gdb/mips-linux-tdep.c
View File

@ -1119,8 +1119,8 @@ mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips_linux_register_addr);
tramp_frame_append (gdbarch, &mips_linux_o32_sigframe);
tramp_frame_append (gdbarch, &mips_linux_o32_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_rt_sigframe);
break;
case MIPS_ABI_N32:
set_gdbarch_get_longjmp_target (gdbarch,
@ -1128,7 +1128,7 @@ mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
tramp_frame_append (gdbarch, &mips_linux_n32_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n32_rt_sigframe);
break;
case MIPS_ABI_N64:
set_gdbarch_get_longjmp_target (gdbarch,
@ -1136,7 +1136,7 @@ mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips64_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
tramp_frame_append (gdbarch, &mips_linux_n64_rt_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n64_rt_sigframe);
break;
default:
internal_error (__FILE__, __LINE__, "can't handle ABI");

6
gdb/tramp-frame.c
View File

@ -146,8 +146,8 @@ tramp_frame_sniffer (const struct frame_unwind *self,
}
void
tramp_frame_append (struct gdbarch *gdbarch,
const struct tramp_frame *tramp_frame)
tramp_frame_prepend_unwinder (struct gdbarch *gdbarch,
const struct tramp_frame *tramp_frame)
{
struct frame_data *data;
struct frame_unwind *unwinder;
@ -171,5 +171,5 @@ tramp_frame_append (struct gdbarch *gdbarch,
unwinder->sniffer = tramp_frame_sniffer;
unwinder->this_id = tramp_frame_this_id;
unwinder->prev_register = tramp_frame_prev_register;
frame_unwind_register_unwinder (gdbarch, unwinder);
frame_unwind_prepend_unwinder (gdbarch, unwinder);
}

4
gdb/tramp-frame.h
View File

@ -63,7 +63,7 @@ struct tramp_frame
CORE_ADDR func);
};
void tramp_frame_append (struct gdbarch *gdbarch,
const struct tramp_frame *tramp);
void tramp_frame_prepend_unwinder (struct gdbarch *gdbarch,
const struct tramp_frame *tramp);
#endif