0f2cd53cf4
On openSUSE Tumbleweed I run into this for the dwarf assembly test-cases, and
some hardcoded assembly test-cases:
...
Running gdb.dwarf2/fission-absolute-dwo.exp ...
gdb compile failed, ld: warning: fission-absolute-dwo.o: \
missing .note.GNU-stack section implies executable stack
ld: NOTE: This behaviour is deprecated and will be removed in a future \
version of the linker
=== gdb Summary ===
# of untested testcases 1
...
Fix the dwarf assembly test-cases by adding the missing .note.GNU-stack in
proc Dwarf::assemble.
Fix the hard-coded test-cases using this command:
...
$ for f in $(find gdb/testsuite/gdb.* -name *.S); do
if ! grep -q note.GNU-stack $f; then
echo -e "\t.section\t.note.GNU-stack,\"\",@progbits" >> $f;
fi;
done
...
Likewise for .s files, and gdb/testsuite/lib/my-syscalls.S.
The idiom for arm seems to be to use %progbits instead, see commit 9a5911c08b
("gdb/testsuite/gdb.dwarf2: Replace @ with % for ARM compatability"), so
hand-edit gdb/testsuite/gdb.arch/arm-disp-step.S to use %progbits instead.
Note that dwarf assembly testcases use %progbits as decided by proc _section.
Tested on x86_64-linux.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29674
167 lines
3.1 KiB
ArmAsm
167 lines
3.1 KiB
ArmAsm
/* Copyright 2020-2022 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <asm/unistd.h>
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/* Define these for each architecture:
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1) RETURN_ADDRESS_REGNO: The register number representing the return
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address in the DWARF CFI. It can be easily be looked up using
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`readelf --debug-dump=frames-interp` on an existing binary of that
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architecture, where it says `ra=X`.
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2) exit_0: a sequence of instruction to execute the exit syscall with
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argument 0. */
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#if defined(__x86_64__)
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# define RETURN_ADDRESS_REGNO 16
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.macro exit_0
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mov $__NR_exit, %rax
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mov $0, %rdi
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syscall
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.endm
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#elif defined(__i386__)
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# define RETURN_ADDRESS_REGNO 8
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.macro exit_0
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mov $__NR_exit, %eax
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mov $0, %ebx
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int $0x80
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.endm
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#elif defined(__aarch64__)
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# define RETURN_ADDRESS_REGNO 30
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.macro exit_0
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mov x0, #0
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mov x8, #__NR_exit
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svc #0
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.endm
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#elif defined(__arm__)
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# define RETURN_ADDRESS_REGNO 14
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.macro exit_0
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ldr r7, =__NR_exit
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ldr r0, =0
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swi 0x0
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.endm
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#elif defined __powerpc64__
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# define RETURN_ADDRESS_REGNO 65
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.macro exit_0
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li 0, __NR_exit /* r0 - contains system call number */
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li 3, 0 /* r3 - contains first argument for sys call */
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sc
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.endm
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#else
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# error "Unsupported architecture"
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#endif
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/* The following assembly program mimics this pseudo C program, where
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everything has been inlined:
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1 void bar(void) {
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2 nop;
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3 }
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4
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5 void foo(void) {
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6 nop;
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7 bar();
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8 nop;
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9 }
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10
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11 void _start(void) {
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12 nop;
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13 foo();
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14 nop;
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15 exit(0);
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16 }
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*/
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#if defined __powerpc64__
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# if _CALL_ELF == 2
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.abiversion 2 /* Tell gdb what ELF version to use. */
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.global _start
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_start:
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# else
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.abiversion 1 /* Tell gdb what ELF version to use. */
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.align 2
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.global _start
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.section ".opd", "aw"
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.align 3
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_start:
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.quad ._start,.TOC.@tocbase,0
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.previous
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.type ._start,@function
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._start:
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# endif
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#else
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.global _start
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_start:
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#endif
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.cfi_startproc
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/* State that the return address for this frame is undefined. */
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.cfi_undefined RETURN_ADDRESS_REGNO
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.global __cu_low_pc
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__cu_low_pc:
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.global __start_low_pc
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__start_low_pc:
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/* Line 12 */
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nop
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.global __foo_low_pc
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__foo_low_pc:
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/* Line 6 */
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nop
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.global __bar_low_pc
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__bar_low_pc:
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/* Line 2 */
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nop
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.global __bar_high_pc
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__bar_high_pc:
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/* Line 8 */
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nop
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.global __foo_high_pc
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__foo_high_pc:
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/* Line 14 */
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nop
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/* Line 15 */
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exit_0
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.cfi_endproc
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.global __start_high_pc
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__start_high_pc:
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.global __cu_high_pc
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__cu_high_pc:
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.section .note.GNU-stack,"",@progbits
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