linux/tools/objtool
Peter Zijlstra 2105a92748 static_call,x86: Robustify trampoline patching
Add a few signature bytes after the static call trampoline and verify
those bytes match before patching the trampoline. This avoids patching
random other JMPs (such as CFI jump-table entries) instead.

These bytes decode as:

   d:   53                      push   %rbx
   e:   43 54                   rex.XB push %r12

And happen to spell "SCT".

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211030074758.GT174703@worktop.programming.kicks-ass.net
2021-11-11 13:09:31 +01:00
..
arch/x86 objtool,x86: Replace alternatives with .retpoline_sites 2021-10-28 23:25:25 +02:00
Documentation objtool: Support stack layout changes in alternatives 2021-01-14 09:53:54 -06:00
include/objtool objtool,x86: Replace alternatives with .retpoline_sites 2021-10-28 23:25:25 +02:00
.gitignore objtool: Rework header include paths 2021-01-13 18:13:14 -06:00
Build objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
builtin-check.c objtool: Parse options from OBJTOOL_ARGS 2021-03-06 12:44:23 +01:00
builtin-orc.c objtool: Collate parse_options() users 2021-03-06 12:44:23 +01:00
check.c static_call,x86: Robustify trampoline patching 2021-11-11 13:09:31 +01:00
elf.c objtool updates: 2021-11-01 13:24:43 -07:00
Makefile objtool: Refactor ORC section generation 2021-01-14 09:53:42 -06:00
objtool.c objtool: Support pv_opsindirect calls for noinstr 2021-09-17 13:20:26 +02:00
orc_dump.c x86/unwind/orc: Change REG_SP_INDIRECT 2021-02-10 20:53:51 +01:00
orc_gen.c Merge branch 'objtool/urgent' 2021-10-07 00:40:17 +02:00
special.c objtool,x86: Replace alternatives with .retpoline_sites 2021-10-28 23:25:25 +02:00
sync-check.sh Merge branch 'x86/cpu' into WIP.x86/core, to merge the NOP changes & resolve a semantic conflict 2021-04-02 12:36:30 +02:00
weak.c objtool: Refactor ORC section generation 2021-01-14 09:53:42 -06:00