forked from Imagelibrary/binutils-gdb
6542e3df20
On x86_64-linux, with test-case gdb.arch/i386-signal.exp I run into:
...
builtin_spawn -ignore SIGHUP gcc -fno-stack-protector i386-signal.c \
-fdiagnostics-color=never -fno-pie -g -no-pie -lm -o i386-signal^M
/tmp/cc2xydTG.s: Assembler messages:^M
/tmp/cc2xydTG.s:50: Error: operand size mismatch for `push'^M
compiler exited with status 1
output is:
/tmp/cc2xydTG.s: Assembler messages:^M
/tmp/cc2xydTG.s:50: Error: operand size mismatch for `push'^M
gdb compile failed, /tmp/cc2xydTG.s: Assembler messages:
/tmp/cc2xydTG.s:50: Error: operand size mismatch for `push'
UNTESTED: gdb.arch/i386-signal.exp: failed to compile
...
This is with gas 2.41, it compiles without problems with gas 2.40. Some more
strict checking was added in commit 5cc007751c ("x86: further adjust
extend-to-32bit-address conditions"). This may or may not be a gas regression
( https://sourceware.org/pipermail/binutils/2023-October/129818.html ).
The offending bit is:
...
" push $sigframe\n"
...
which refers to a function:
...
" .globl sigframe\n"
"sigframe:\n"
...
The test-case passes with target board unix/-m32.
Make the test-case work by using pushq instead of push for the
is_amd64_regs_target case.
Tested on x86_64-linux, with target boards:
- unix/-m64 (is_amd64_regs_target == 1), and
- unix/-m32 (is_amd64_regs_target == 0),
PR testsuite/30928
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30928
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Unwinder test program for signal frames.
|
|
|
|
Copyright 2007-2023 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 sigframe (void);
|
|
void setup (void);
|
|
|
|
void
|
|
func (void)
|
|
{
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
setup ();
|
|
}
|
|
|
|
/* Create an imitation signal frame. This will work on any x86 or
|
|
x86-64 target which uses a version of GAS recent enough for
|
|
.cfi_signal_frame (added 2006-02-27 and included in binutils 2.17).
|
|
The default CIE created by gas suffices to unwind from an empty
|
|
function. */
|
|
|
|
/* Note: to make sure that the Dwarf unwinder gets to handle
|
|
the frame, we add an extra 'nop' after the label. Otherwise,
|
|
the epilogue unwinder will see the 'ret' and grab the frame. */
|
|
|
|
asm(".text\n"
|
|
" .align 8\n"
|
|
" .globl setup\n"
|
|
"setup:\n"
|
|
#if IS_AMD64_REGS_TARGET
|
|
" pushq $sigframe\n"
|
|
#else
|
|
" push $sigframe\n"
|
|
#endif
|
|
" jmp func\n"
|
|
"\n"
|
|
" .cfi_startproc\n"
|
|
" .cfi_signal_frame\n"
|
|
" nop\n"
|
|
" .globl sigframe\n"
|
|
"sigframe:\n"
|
|
" nop\n"
|
|
" ret\n"
|
|
" .cfi_endproc");
|