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* rs6000-tdep.c (pop_frame): Correctly find the registers saved in 

the stack frame.  Their offset from the previous stack frame is in
fdata.gpr_offset and fdata.fpr_offset, not fdata.offset.
(gdb.base/return.exp)
* config/rs6000/tm-rs6000.h: Doc fixes.
This commit is contained in:
Jim Blandy 1998-12-07 20:28:54 +00:00
parent 0bd416fe37
commit 63d7a4f12e
2 changed files with 25 additions and 17 deletions
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10
gdb/config/rs6000/tm-rs6000.h
View File

@ -66,14 +66,16 @@ struct fp_status {
/* To be used by skip_prologue. */
struct rs6000_framedata {
int offset; /* # of bytes in gpr's and fpr's are saved */
int offset; /* total size of frame --- the distance
by which we decrement sp to allocate
the frame */
int saved_gpr; /* smallest # of saved gpr */
int saved_fpr; /* smallest # of saved fpr */
int alloca_reg; /* alloca register number (frame ptr) */
char frameless; /* true if frameless functions. */
char nosavedpc; /* true if pc not saved. */
int gpr_offset; /* offset of saved gprs */
int fpr_offset; /* offset of saved fprs */
int gpr_offset; /* offset of saved gprs from prev sp */
int fpr_offset; /* offset of saved fprs from prev sp */
int lr_offset; /* offset of saved lr */
int cr_offset; /* offset of saved cr */
};
@ -149,7 +151,7 @@ extern void aix_process_linenos PARAMS ((void));
/* Stack grows downward. */
#define INNER_THAN <
#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
/* This is how arguments pushed onto stack or passed in registers.
Stack must be aligned on 64-bit boundaries when synthesizing

32
gdb/rs6000-tdep.c
View File

@ -213,19 +213,20 @@ rs6000_software_single_step (signal, insert_breakpoints_p)
/* return pc value after skipping a function prologue and also return
information about a function frame.
in struct rs6000_frameinfo fdata:
in struct rs6000_framedata fdata:
- frameless is TRUE, if function does not have a frame.
- nosavedpc is TRUE, if function does not save %pc value in its frame.
- offset is the number of bytes used in the frame to save registers.
- offset is the initial size of this stack frame --- the amount by
which we decrement the sp to allocate the frame.
- saved_gpr is the number of the first saved gpr.
- saved_fpr is the number of the first saved fpr.
- alloca_reg is the number of the register used for alloca() handling.
Otherwise -1.
- gpr_offset is the offset of the saved gprs
- fpr_offset is the offset of the saved fprs
- gpr_offset is the offset of the first saved gpr from the previous frame.
- fpr_offset is the offset of the first saved fpr from the previous frame.
- lr_offset is the offset of the saved lr
- cr_offset is the offset of the saved cr
*/
*/
#define SIGNED_SHORT(x) \
((sizeof (short) == 2) \
@ -668,19 +669,24 @@ pop_frame ()
write_register (PC_REGNUM, lr);
/* reset register values if any was saved earlier. */
addr = prev_sp - fdata.offset;
if (fdata.saved_gpr != -1)
for (ii = fdata.saved_gpr; ii <= 31; ++ii) {
read_memory (addr, &registers [REGISTER_BYTE (ii)], 4);
addr += 4;
{
addr = prev_sp + fdata.gpr_offset;
for (ii = fdata.saved_gpr; ii <= 31; ++ii) {
read_memory (addr, &registers [REGISTER_BYTE (ii)], 4);
addr += 4;
}
}
if (fdata.saved_fpr != -1)
for (ii = fdata.saved_fpr; ii <= 31; ++ii) {
read_memory (addr, &registers [REGISTER_BYTE (ii+FP0_REGNUM)], 8);
addr += 8;
}
{
addr = prev_sp + fdata.fpr_offset;
for (ii = fdata.saved_fpr; ii <= 31; ++ii) {
read_memory (addr, &registers [REGISTER_BYTE (ii+FP0_REGNUM)], 8);
addr += 8;
}
}
write_register (SP_REGNUM, prev_sp);
target_store_registers (-1);