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| author | Indu Bhagat <indu.bhagat@oracle.com> | 2025-07-09 23:13:58 +0200 |
|---|---|---|
| committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2025-07-12 11:33:25 +0200 |
| commit | b9b7bbb466efc2955c80204250eedeecfacbecd7 (patch) | |
| tree | 2d743a811b3058b28d916b7622b00540310be464 /gdb/aarch64-fbsd-tdep.h | |
| parent | 97d71f2366fdbe506bcfad0c0abd3914ba334ada (diff) | |
| download | binutils-master.zip binutils-master.tar.gz binutils-master.tar.bz2 | |
Add new command line option -z memtag-stack for aarch64 elf. This
option instructs the linker to generate the necessary dynamic tag
DT_AARCH64_MEMTAG_STACK, which the dynamic loader can then use to
protect the stack memory with PROT_MTE. Linker issues an
'unrecognized option' error when -z memtag-stack is specified for
non-aarch64 based emulations.
readelf displays the dynamic tag when present:
$ readelf -d <exectutable>
Dynamic section at offset 0xfdd8 contains XX entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000c (INIT) 0x400520
0x000000000000000d (FINI) 0x400b64
0x0000000000000019 (INIT_ARRAY) 0x41fdc8
... ... ...
0x000000007000000c (AARCH64_MEMTAG_STACK) 0x1
... ... ...
ChangeLog:
* bfd/elfnn-aarch64.c (elfNN_aarch64_late_size_sections): Emit
DT_AARCH64_MEMTAG_STACK dynamic tag.
* bfd/elfxx-aarch64.h (struct aarch64_memtag_opts): Add new
member for tracking whether stack access uses MTE insns.
* binutils/readelf.c (get_aarch64_dynamic_type): Handle
DT_AARCH64_MEMTAG_STACK.
* ld/emultempl/aarch64elf.em: Add new command line option.
* ld/ld.texi: Add documentation for -z memtag-stack.
* ld/testsuite/ld-aarch64/aarch64-elf.exp: Add new test.
* ld/testsuite/ld-aarch64/dt-memtag-stack.d: New test.
include/ChangeLog:
* elf/aarch64.h (DT_AARCH64_MEMTAG_STACK): New definition.
Diffstat (limited to 'gdb/aarch64-fbsd-tdep.h')
0 files changed, 0 insertions, 0 deletions