diff options
| author | Mark Kettenis <kettenis@gnu.org> | 2012-05-07 21:02:43 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@gnu.org> | 2012-05-07 21:02:43 +0000 |
| commit | 649e6d9245bb52c1f90fe29b29655327ad33edb6 (patch) | |
| tree | 89b9cc41a3b9267e12f7efe60ffc1ef2944c9b18 /gdb | |
| parent | f39c6ffde753509963229ab018b461be2600dd2a (diff) | |
| download | gdb-649e6d9245bb52c1f90fe29b29655327ad33edb6.zip gdb-649e6d9245bb52c1f90fe29b29655327ad33edb6.tar.gz gdb-649e6d9245bb52c1f90fe29b29655327ad33edb6.tar.bz2 | |
H.J. Lu <hongjiu.lu@intel.com>
* amd64-tdep.c (amd64_analyze_prologue): Additionally check for
`movl %esp, %ebp' for the X32 ABI.
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/amd64-tdep.c | 43 |
2 files changed, 40 insertions, 9 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index f344547..979909a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2012-05-07 Mark Kettenis <kettenis@gnu.org> + H.J. Lu <hongjiu.lu@intel.com> + + * amd64-tdep.c (amd64_analyze_prologue): Additionally check for + `movl %esp, %ebp' for the X32 ABI. + 2012-05-07 Tom Tromey <tromey@redhat.com> * dwarf2read.c (dwarf_tag_name): Return const char *. Use diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c index 685fa48..b433e1f 100644 --- a/gdb/amd64-tdep.c +++ b/gdb/amd64-tdep.c @@ -1867,8 +1867,14 @@ amd64_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc, pushq %rbp 0x55 movq %rsp, %rbp 0x48 0x89 0xe5 (or 0x48 0x8b 0xec) - Any function that doesn't start with this sequence will be assumed - to have no prologue and thus no valid frame pointer in %rbp. */ + or (for the X32 ABI): + + pushq %rbp 0x55 + movl %esp, %ebp 0x89 0xe5 (or 0x8b 0xec) + + Any function that doesn't start with one of these sequences will be + assumed to have no prologue and thus no valid frame pointer in + %rbp. */ static CORE_ADDR amd64_analyze_prologue (struct gdbarch *gdbarch, @@ -1879,6 +1885,10 @@ amd64_analyze_prologue (struct gdbarch *gdbarch, /* There are two variations of movq %rsp, %rbp. */ static const gdb_byte mov_rsp_rbp_1[3] = { 0x48, 0x89, 0xe5 }; static const gdb_byte mov_rsp_rbp_2[3] = { 0x48, 0x8b, 0xec }; + /* Ditto for movl %esp, %ebp. */ + static const gdb_byte mov_esp_ebp_1[2] = { 0x89, 0xe5 }; + static const gdb_byte mov_esp_ebp_2[2] = { 0x8b, 0xec }; + gdb_byte buf[3]; gdb_byte op; @@ -1900,15 +1910,30 @@ amd64_analyze_prologue (struct gdbarch *gdbarch, if (current_pc <= pc + 1) return current_pc; - /* Check for `movq %rsp, %rbp'. */ read_memory (pc + 1, buf, 3); - if (memcmp (buf, mov_rsp_rbp_1, 3) != 0 - && memcmp (buf, mov_rsp_rbp_2, 3) != 0) - return pc + 1; - /* OK, we actually have a frame. */ - cache->frameless_p = 0; - return pc + 4; + /* Check for `movq %rsp, %rbp'. */ + if (memcmp (buf, mov_rsp_rbp_1, 3) == 0 + || memcmp (buf, mov_rsp_rbp_2, 3) == 0) + { + /* OK, we actually have a frame. */ + cache->frameless_p = 0; + return pc + 4; + } + + /* For X32, also check for `movq %esp, %ebp'. */ + if (gdbarch_ptr_bit (gdbarch) == 32) + { + if (memcmp (buf, mov_esp_ebp_1, 2) == 0 + || memcmp (buf, mov_esp_ebp_2, 2) == 0) + { + /* OK, we actually have a frame. */ + cache->frameless_p = 0; + return pc + 3; + } + } + + return pc + 1; } return pc; |