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* arm-tdep.c (thumb_analyze_prologue): Always fallback on the SP
register when the frame can't be determined.
* arm-tdep.c (arm_analyze_prologue): Ditto.

gdb/testsuite/
* gdb.arch/thumb-prologue.c (switch_stack_to_same): New test function.
(switch_stack_to_other): New test function.
* gdb.arch/thumb-prologue.exp: New test cases.
This commit is contained in:
Meador Inge 2011-11-09 00:53:40 +00:00
parent 6a12077df4
commit 72a2e3dcf5
5 changed files with 75 additions and 14 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2011-11-08 Meador Inge <meadori@codesourcery.com>
* arm-tdep.c (thumb_analyze_prologue): Always fallback on the SP
register when the frame can't be determined.
* arm-tdep.c (arm_analyze_prologue): Ditto.
2011-11-07 Stan Shebs <stan@codesourcery.com>
* MAINTAINERS: Move Michael Snyder to Past Maintainers.

16
gdb/arm-tdep.c
View File

@ -1152,18 +1152,12 @@ thumb_analyze_prologue (struct gdbarch *gdbarch,
cache->framereg = THUMB_FP_REGNUM;
cache->framesize = -regs[THUMB_FP_REGNUM].k;
}
else if (pv_is_register (regs[ARM_SP_REGNUM], ARM_SP_REGNUM))
else
{
/* Try the stack pointer... this is a bit desperate. */
cache->framereg = ARM_SP_REGNUM;
cache->framesize = -regs[ARM_SP_REGNUM].k;
}
else
{
/* We're just out of luck. We don't know where the frame is. */
cache->framereg = -1;
cache->framesize = 0;
}
for (i = 0; i < 16; i++)
if (pv_area_find_reg (stack, gdbarch, i, &offset))
@ -1883,18 +1877,12 @@ arm_analyze_prologue (struct gdbarch *gdbarch,
framereg = ARM_FP_REGNUM;
framesize = -regs[ARM_FP_REGNUM].k;
}
else if (pv_is_register (regs[ARM_SP_REGNUM], ARM_SP_REGNUM))
else
{
/* Try the stack pointer... this is a bit desperate. */
framereg = ARM_SP_REGNUM;
framesize = -regs[ARM_SP_REGNUM].k;
}
else
{
/* We're just out of luck. We don't know where the frame is. */
framereg = -1;
framesize = 0;
}
if (cache)
{

6
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,9 @@
2011-11-08 Meador Inge <meadori@codesourcery.com>
* gdb.arch/thumb-prologue.c (switch_stack_to_same): New test function.
(switch_stack_to_other): New test function.
* gdb.arch/thumb-prologue.exp: New test cases.
2010-11-08 Maciej W. Rozycki <macro@codesourcery.com>
* lib/mi-support.exp (mi_send_resuming_command_raw): Fix a typo.

34
gdb/testsuite/gdb.arch/thumb-prologue.c
View File

@ -18,11 +18,15 @@
along with this program. If not, see <http://www.gnu.org/licenses/>. */
void tpcs_frame (void);
void switch_stack_to_same (void);
void switch_stack_to_other (void);
int
main (void)
{
tpcs_frame ();
switch_stack_to_same ();
switch_stack_to_other ();
return 0;
}
@ -104,3 +108,33 @@ asm(".text\n"
" mov lr, r3\n"
" bx lr\n"
);
asm(".text\n"
" .align 2\n"
" .thumb_func\n"
" .code 16\n"
"write_sp:\n"
" mov sp, r0\n"
" bx lr\n"
" .align 2\n"
" .thumb_func\n"
" .code 16\n"
"switch_stack_to_same:\n"
" push {lr}\n"
" mov r0, sp\n"
" bl write_sp\n"
" pop {r1}\n"
" bx r1\n"
" .align 2\n"
" .thumb_func\n"
" .code 16\n"
"switch_stack_to_other:\n"
" push {lr}\n"
" mov r7, sp\n"
" mov r0, #128\n"
" bl write_sp\n"
" mov sp, r7\n"
" pop {r1}\n"
" bx r1\n");

27
gdb/testsuite/gdb.arch/thumb-prologue.exp
View File

@ -59,3 +59,30 @@ gdb_test "backtrace 10" \
gdb_test "info frame" \
".*Saved registers:.*r7 at.*r10 at.*r11 at.*lr at.*" \
"saved registers in TPCS"
# Testcase for "switching" the stack to the same stack in the prologue.
gdb_breakpoint "switch_stack_to_same"
gdb_test "continue" "Breakpoint .*, $hex in switch_stack_to_same \\(\\)" \
"continue to switch_stack_to_same"
gdb_test "stepi 2" "in write_sp \\(\\)" "stepi over mov sp, sp"
gdb_test "backtrace 10" \
"#0\[ \t\]*$hex in write_sp .*\r\n#1\[ \t\]*$hex in switch_stack_to_same .*\r\n#2\[ \t\]*$hex in main.*" \
"backtrace in write_sp"
# Testcase for switching to another stack in the prologue.
gdb_breakpoint "switch_stack_to_other"
gdb_test "continue" "Breakpoint .*, $hex in switch_stack_to_other \\(\\)" \
"continue to switch_stack_to_other"
gdb_test "stepi 2" "in write_sp \\(\\)" "stepi over mov sp, 128"
gdb_test "backtrace 10" \
"#0\[ \t\]*$hex in write_sp .*\r\n#1\[ \t\]*$hex in switch_stack_to_other .*\r\n#2\[ \t\]*$hex in main.*" \
"backtrace in write_sp"