diff options
Diffstat (limited to 'gdb/s390-tdep.c')
| -rw-r--r-- | gdb/s390-tdep.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/gdb/s390-tdep.c b/gdb/s390-tdep.c index e0ea2af..2d28d9c 100644 --- a/gdb/s390-tdep.c +++ b/gdb/s390-tdep.c @@ -209,13 +209,21 @@ s390_get_frame_info (CORE_ADDR pc, struct frame_extra_info *fextra_info, int fprs_saved[S390_NUM_FPRS]; int regidx, instrlen; int const_pool_state; - int frame_pointer_found, varargs_state; + int varargs_state; int loop_cnt, gdb_gpr_store, gdb_fpr_store; - int frame_pointer_regidx = 0xf; int offset, expected_offset; int err = 0; disassemble_info info; + /* Have we seen an instruction initializing the frame pointer yet? + If we've seen an `lr %r11, %r15', then frame_pointer_found is + non-zero, and frame_pointer_regidx == 11. Otherwise, + frame_pointer_found is zero and frame_pointer_regidx is 15, + indicating that we're using the stack pointer as our frame + pointer. */ + int frame_pointer_found = 0; + int frame_pointer_regidx = 0xf; + /* What we've seen so far regarding saving the back chain link: 0 -- nothing yet; sp still has the same value it had at the entry point. Since not all functions allocate frames, this is a @@ -236,7 +244,7 @@ s390_get_frame_info (CORE_ADDR pc, struct frame_extra_info *fextra_info, 4 -- The frame and link are now fully initialized. We've reserved space for the new stack frame, and stored the old stack pointer captured in the back chain pointer field. */ - int save_link_state; + int save_link_state = 0; int save_link_regidx, subtract_sp_regidx; /* What we've seen so far regarding r12 --- the GOT (Global Offset @@ -250,11 +258,11 @@ s390_get_frame_info (CORE_ADDR pc, struct frame_extra_info *fextra_info, When got_state is 1, then got_load_addr is the address of the load instruction, and got_load_len is the length of that instruction. */ - int got_state; + int got_state= 0; CORE_ADDR got_load_addr = 0, got_load_len = 0; - const_pool_state = save_link_state = got_state = varargs_state = 0; - frame_pointer_found = 0; + const_pool_state = varargs_state = 0; + memset (gprs_saved, 0, sizeof (gprs_saved)); memset (fprs_saved, 0, sizeof (fprs_saved)); info.read_memory_func = dis_asm_read_memory; |