Josh Poimboeuf f3fe1b141d objtool: Support asm jump tables ...

commit 99033461e685b48549ec77608b4bda75ddf772ce upstream.

Objtool detection of asm jump tables would normally just work, except
for the fact that asm retpolines use alternatives.  Objtool thinks the
alternative code path (a jump to the retpoline) is a sibling call.

Don't treat alternative indirect branches as sibling calls when the
original instruction has a jump table.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/460cf4dc675d64e1124146562cabd2c05aa322e8.1614182415.git.jpoimboe@redhat.com
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-07-25 11:26:18 +02:00

..

arch/x86

objtool/x86: Rewrite retpoline thunk calls

2022-07-25 11:26:18 +02:00

Documentation

objtool: Support stack layout changes in alternatives

2022-07-25 11:26:06 +02:00

.gitignore

.gitignore: add SPDX License Identifier

2020-03-25 11:50:48 +01:00

arch.h

objtool: Keep track of retpoline call sites

2022-07-25 11:26:17 +02:00

Build

objtool: Enable compilation of objtool for all architectures

2020-05-20 09:17:28 -05:00

builtin-check.c

objtool: Move ORC logic out of check()

2020-09-01 17:19:11 -05:00

builtin-orc.c

objtool: Refactor ORC section generation

2022-07-25 11:26:05 +02:00

builtin.h

objtool: Implement noinstr validation

2020-04-22 10:53:50 +02:00

cfi.h

objtool: Fix !CFI insn_state propagation

2020-04-22 10:53:50 +02:00

check.c

objtool: Support asm jump tables

2022-07-25 11:26:18 +02:00

check.h

objtool: Cache instruction relocs

2022-07-25 11:26:17 +02:00

elf.c

objtool: Add elf_create_undef_symbol()

2022-07-25 11:26:16 +02:00

elf.h

objtool: Add elf_create_undef_symbol()

2022-07-25 11:26:16 +02:00

Makefile

objtool: Refactor ORC section generation

2022-07-25 11:26:05 +02:00

objtool.c

objtool: Keep track of retpoline call sites

2022-07-25 11:26:17 +02:00

objtool.h

objtool: Keep track of retpoline call sites

2022-07-25 11:26:17 +02:00

orc_dump.c

objtool: Make unwind hint definitions available to other architectures

2020-09-10 10:43:13 -05:00

orc_gen.c

objtool: Create reloc sections implicitly

2022-07-25 11:26:15 +02:00

special.c

objtool: Skip magical retpoline .altinstr_replacement

2022-07-25 11:26:18 +02:00

special.h

objtool: Refactor jump table code to support other architectures

2020-09-10 10:43:13 -05:00

sync-check.sh

x86/insn: Add a __ignore_sync_check__ marker

2022-07-25 11:26:11 +02:00

warn.h

objtool: Rename find_containing_func()

2020-03-25 18:28:29 +01:00

weak.c

objtool: Refactor ORC section generation

2022-07-25 11:26:05 +02:00