140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
/* Unwinder test program.
|
|
|
|
Copyright 2006-2012 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
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;
|
|
}
|
|
|
|
/* Normally Thumb functions use r7 as the frame pointer. However,
|
|
with the GCC option -mtpcs-frame, they may use fp instead. Make
|
|
sure that the prologue analyzer can handle this. */
|
|
|
|
asm(".text\n"
|
|
" .align 2\n"
|
|
" .thumb_func\n"
|
|
" .code 16\n"
|
|
"tpcs_frame_1:\n"
|
|
" sub sp, #16\n"
|
|
" push {r7}\n"
|
|
" add r7, sp, #20\n"
|
|
" str r7, [sp, #8]\n"
|
|
" mov r7, pc\n"
|
|
" str r7, [sp, #16]\n"
|
|
" mov r7, fp\n"
|
|
" str r7, [sp, #4]\n"
|
|
" mov r7, lr\n"
|
|
" str r7, [sp, #12]\n"
|
|
" add r7, sp, #16\n"
|
|
" mov fp, r7\n"
|
|
" mov r7, sl\n"
|
|
" push {r7}\n"
|
|
|
|
/* We'll set a breakpoint at this call. We can't hardcode a trap
|
|
instruction; the right instruction to use varies too much. And
|
|
we can't use a global label, because GDB will think that's the
|
|
start of a new function. So, this slightly convoluted
|
|
technique. */
|
|
".Ltpcs:\n"
|
|
" nop\n"
|
|
|
|
" pop {r2}\n"
|
|
" mov sl, r2\n"
|
|
" pop {r7}\n"
|
|
" pop {r1, r2}\n"
|
|
" mov fp, r1\n"
|
|
" mov sp, r2\n"
|
|
" bx lr\n"
|
|
|
|
" .align 2\n"
|
|
" .type tpcs_offset, %object\n"
|
|
"tpcs_offset:\n"
|
|
" .word .Ltpcs - tpcs_frame_1\n"
|
|
|
|
" .align 2\n"
|
|
" .thumb_func\n"
|
|
" .code 16\n"
|
|
"tpcs_frame:\n"
|
|
" sub sp, #16\n"
|
|
" push {r7}\n"
|
|
" add r7, sp, #20\n"
|
|
" str r7, [sp, #8]\n"
|
|
" mov r7, pc\n"
|
|
" str r7, [sp, #16]\n"
|
|
" mov r7, fp\n"
|
|
" str r7, [sp, #4]\n"
|
|
" mov r7, lr\n"
|
|
" str r7, [sp, #12]\n"
|
|
" add r7, sp, #16\n"
|
|
" mov fp, r7\n"
|
|
" mov r7, sl\n"
|
|
" push {r7}\n"
|
|
|
|
/* Clobber saved regs around the call. */
|
|
" mov r7, #0\n"
|
|
" mov lr, r7\n"
|
|
" bl tpcs_frame_1\n"
|
|
|
|
" pop {r2}\n"
|
|
" mov sl, r2\n"
|
|
" pop {r7}\n"
|
|
" pop {r1, r2, r3}\n"
|
|
" mov fp, r1\n"
|
|
" mov sp, r2\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");
|