diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-11-13 02:03:29 +0300 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-01-14 03:13:13 +0300 |
| commit | 8bfe273238d77d3cee18e4c03b2f26ae360b5661 (patch) | |
| tree | cd0313607796a23f9adf6f5f60a441f84ffc69dd /tools/objtool/check.c | |
| parent | a1a664ece586457e9f7652b0bc5b08386259e358 (diff) | |
| download | linux-8bfe273238d77d3cee18e4c03b2f26ae360b5661.tar.xz | |
objtool: Fix x86 orc generation on big endian cross-compiles
Correct objtool orc generation endianness problems to enable fully
functional x86 cross-compiles on big endian hardware.
Introduce bswap_if_needed() macro, which does a byte swap if target
endianness doesn't match the host, i.e. cross-compilation for little
endian on big endian and vice versa. The macro is used for conversion
of multi-byte values which are read from / about to be written to a
target native endianness ELF file.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Diffstat (limited to 'tools/objtool/check.c')
| -rw-r--r-- | tools/objtool/check.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 270adc38d896..8cda0ef06522 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -13,6 +13,7 @@ #include "special.h" #include "warn.h" #include "arch_elf.h" +#include "endianness.h" #include <linux/objtool.h> #include <linux/hashtable.h> @@ -1435,7 +1436,7 @@ static int read_unwind_hints(struct objtool_file *file) cfa = &insn->cfi.cfa; if (hint->type == UNWIND_HINT_TYPE_RET_OFFSET) { - insn->ret_offset = hint->sp_offset; + insn->ret_offset = bswap_if_needed(hint->sp_offset); continue; } @@ -1447,7 +1448,7 @@ static int read_unwind_hints(struct objtool_file *file) return -1; } - cfa->offset = hint->sp_offset; + cfa->offset = bswap_if_needed(hint->sp_offset); insn->cfi.type = hint->type; insn->cfi.end = hint->end; } |