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| author | Andrew Cagney <cagney@redhat.com> | 2004-03-24 23:14:39 +0000 |
|---|---|---|
| committer | Andrew Cagney <cagney@redhat.com> | 2004-03-24 23:14:39 +0000 |
| commit | 1196bfdaf9becb2a90e01bec41fc18b24affad38 (patch) | |
| tree | 8dd0a5d71a7a17a3d34629f3540da394c965bea0 /gdb/tramp-frame.c | |
| parent | 38f443c80eac123969131b3692a773f31efa0f30 (diff) | |
| download | gdb-1196bfdaf9becb2a90e01bec41fc18b24affad38.zip gdb-1196bfdaf9becb2a90e01bec41fc18b24affad38.tar.gz gdb-1196bfdaf9becb2a90e01bec41fc18b24affad38.tar.bz2 | |
2004-03-24 Andrew Cagney <cagney@redhat.com>
* tramp-frame.h (TRAMP_SENTINEL_INSN): Define, document.
* tramp-frame.c: Include "gdb_assert.h".
(tramp_frame_start): Use TRAMP_SENTINEL_INSN. Use ULONGEST and
correct sizeof.
(tramp_frame_append): Validate the tramp frame's instructions.
* Makefile.in (tramp-frame.o): Update dependencies.
Diffstat (limited to 'gdb/tramp-frame.c')
| -rw-r--r-- | gdb/tramp-frame.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/gdb/tramp-frame.c b/gdb/tramp-frame.c index 7a8057e..ee3635f 100644 --- a/gdb/tramp-frame.c +++ b/gdb/tramp-frame.c @@ -28,6 +28,7 @@ #include "target.h" #include "trad-frame.h" #include "frame-base.h" +#include "gdb_assert.h" struct frame_data { @@ -89,15 +90,15 @@ tramp_frame_start (CORE_ADDR pc, 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] != 0; ti++) + for (ti = 0; tramp->insn[ti] != TRAMP_SENTINEL_INSN; ti++) { CORE_ADDR func = pc - tramp->insn_size * ti; int i; for (i = 0; 1; i++) { - bfd_byte buf[sizeof (LONGEST)]; - CORE_ADDR insn; - if (tramp->insn[i] == 0) + bfd_byte buf[sizeof (tramp->insn[0])]; + ULONGEST insn; + if (tramp->insn[i] == TRAMP_SENTINEL_INSN) return func; if (target_read_memory (func + i * tramp->insn_size, buf, tramp->insn_size) != 0) @@ -148,6 +149,16 @@ tramp_frame_append (struct gdbarch *gdbarch, { struct frame_data *data; struct frame_unwind *unwinder; + int i; + + /* 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) + break; + } + gdb_assert (i < ARRAY_SIZE (tramp_frame->insn)); + gdb_assert (tramp_frame->insn_size <= sizeof (tramp_frame->insn[0])); data = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_data); unwinder = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind); |