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| author | Sudakshina Das <sudi.das@arm.com> | 2019-04-25 11:37:25 +0100 |
|---|---|---|
| committer | Sudakshina Das <sudi.das@arm.com> | 2019-04-25 11:37:25 +0100 |
| commit | 68bb0359eec3093560929b8ad2b3f5d30e7a7e1d (patch) | |
| tree | 64d5f1e62bc1ad0bd4fb79e91feb42c488ad5dc9 /gdb/gdbserver/regcache.c | |
| parent | cd0923370be1a6412e9b8fb5c8e9e39d90f1d3ea (diff) | |
| download | fsf-binutils-gdb-68bb0359eec3093560929b8ad2b3f5d30e7a7e1d.zip fsf-binutils-gdb-68bb0359eec3093560929b8ad2b3f5d30e7a7e1d.tar.gz fsf-binutils-gdb-68bb0359eec3093560929b8ad2b3f5d30e7a7e1d.tar.bz2 | |
[BFD, AArch64] Improve bti/pac plts.
This patch aims to improve the definitions of BTI and PAC based PLTs.
The following changes are made:
* PLT0 does not need PAC instructions since the PLTGOT[2] (and PLTGOT[1])
are readonly so they cannot be corrupted at runtime. Thus both PAC plt0
and BTI+PAC plt0 are removed and we can use basic plt0 and BTI plt0
instead, respectively.
* We can remove the extra padding nops when we add the new bti instructions.
BTI plt0 and BTI TLSDESC plt are updated.
* For better performance PLTn could be padded to 24bytes. Both BTI pltn and
PAC pltn are updated.
*** bfd/ChangeLog ***
2019-04-25 Sudakshina Das <sudi.das@arm.com>
* elfnn-aarch64.c (PLT_BTI_ENTRY_SIZE): Remove.
(PLT_BTI_TLSDESC_ENTRY_SIZE): Remove.
(PLT_PAC_ENTRY_SIZE, PLT_BTI_PAC_ENTRY_SIZE): Remove.
(PLT_BTI_SMALL_ENTRY_SIZE, PLT_PAC_SMALL_ENTRY_SIZE): Update.
(elfNN_aarch64_small_plt0_pac_entry): Remove.
(elfNN_aarch64_small_plt0_bti_pac_entry): Remove.
(elfNN_aarch64_small_plt0_bti_entry): Update.
(elfNN_aarch64_small_plt_bti_entry): Update.
(elfNN_aarch64_small_plt_pac_entry): Update.
(elfNN_aarch64_tlsdesc_small_plt_bti_entry): Update.
(setup_plt_values): Setup new entries.
(elfNN_aarch64_finish_dynamic_sections): Remove size change.
(elfNN_aarch64_plt_sym_val): Likewise.
*** ld/ChangeLog ***
2019-04-25 Sudakshina Das <sudi.das@arm.com>
* testsuite/ld-aarch64/bti-pac-plt-1.d: Update.
* testsuite/ld-aarch64/bti-pac-plt-2.d: Update.
* testsuite/ld-aarch64/bti-plt-1.d: Update.
* testsuite/ld-aarch64/bti-plt-3.d: Update.
* testsuite/ld-aarch64/bti-plt-5.d: Update.
* testsuite/ld-aarch64/pac-plt-1.d: Update.
* testsuite/ld-aarch64/pac-plt-2.d: Update.
Diffstat (limited to 'gdb/gdbserver/regcache.c')
0 files changed, 0 insertions, 0 deletions