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