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2004-11-30 Randolph Chung <tausq@debian.org> 

* hppa-linux-tdep.c (insns_match_pattern_relaxed): New function.
	(hppa_linux_in_dyncall): Check that we are inside the range of
	$$dyncall, not necessarily at the first insn.
	(hppa_linux_in_solib_call_trampoline): Identify a trampoline
	even if the pc does not point to the first insn of the trampoline.
This commit is contained in:
Randolph Chung 2004-12-01 06:58:57 +00:00
parent 8de0841b1c
commit b546247c05
2 changed files with 49 additions and 5 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2004-11-30 Randolph Chung <tausq@debian.org>
* hppa-linux-tdep.c (insns_match_pattern_relaxed): New function.
(hppa_linux_in_dyncall): Check that we are inside the range of
$$dyncall, not necessarily at the first insn.
(hppa_linux_in_solib_call_trampoline): Identify a trampoline
even if the pc does not point to the first insn of the trampoline.
2004-11-30 Randolph Chung <tausq@debian.org>
* breakpoint.c (break_at_finish_command): Delete.

46
gdb/hppa-linux-tdep.c
View File

@ -161,10 +161,39 @@ insns_match_pattern (CORE_ADDR pc,
return 1;
}
/* The relaxed version of the insn matcher allows us to match from somewhere
inside the pattern, by looking backwards in the instruction scheme. */
static int
insns_match_pattern_relaxed (CORE_ADDR pc,
struct insn_pattern *pattern,
unsigned int *insn)
{
int pat_len = 0;
int offset;
while (pattern[pat_len].mask)
pat_len++;
for (offset = 0; offset < pat_len; offset++)
{
if (insns_match_pattern (pc - offset * 4,
pattern, insn))
return 1;
}
return 0;
}
static int
hppa_linux_in_dyncall (CORE_ADDR pc)
{
return pc == hppa_symbol_address("$$dyncall");
struct unwind_table_entry *u;
u = find_unwind_entry (hppa_symbol_address ("$$dyncall"));
if (!u)
return 0;
return pc >= u->region_start && pc <= u->region_end;
}
/* There are several kinds of "trampolines" that we need to deal with:
@ -182,13 +211,20 @@ hppa_linux_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN];
int r;
struct unwind_table_entry *u;
/* on hppa-linux, linker stubs have no unwind information. Since the pattern
matching for linker stubs can be quite slow, we try to avoid it if
we can. */
u = find_unwind_entry (pc);
r = in_plt_section (pc, name)
|| hppa_linux_in_dyncall (pc)
|| insns_match_pattern (pc, hppa_import_stub, insn)
|| insns_match_pattern (pc, hppa_import_pic_stub, insn)
|| insns_match_pattern (pc, hppa_long_branch_stub, insn)
|| insns_match_pattern (pc, hppa_long_branch_pic_stub, insn);
|| (u == NULL
&& (insns_match_pattern_relaxed (pc, hppa_import_stub, insn)
|| insns_match_pattern_relaxed (pc, hppa_import_pic_stub, insn)
|| insns_match_pattern_relaxed (pc, hppa_long_branch_stub, insn)
|| insns_match_pattern_relaxed (pc, hppa_long_branch_pic_stub, insn)));
return r;
}