Add support for 'bla' instruction.
This is done by 'flagging' the address as an absolute address so that
arch_jump_destination() can calculate it as expected. Because code is
_always_ 4 bytes aligned, use bit 30 as flag.
Also add support for 'b' and 'ba' instructions. Objtool call them jumps.
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
tools/objtool/arch/powerpc/decode.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/objtool/arch/powerpc/decode.c
b/tools/objtool/arch/powerpc/decode.c
index 53b55690f320..c1228fef3dec 100644
--- a/tools/objtool/arch/powerpc/decode.c
+++ b/tools/objtool/arch/powerpc/decode.c
@@ -55,12 +55,15 @@ int arch_decode_instruction(struct objtool_file *file,
const struct section *sec
switch (opcode) {
case 18: /* b[l][a] */
- if ((ins & 3) == 1) /* bl */
+ if (ins & 1) /* bl[a] */
typ = INSN_CALL;
+ else /* b[a] */
+ typ = INSN_JUMP_UNCONDITIONAL;
imm = ins & 0x3fffffc;
if (imm & 0x2000000)
imm -= 0x4000000;
+ imm |= ins & 2; /* AA flag */
break;
}
@@ -77,6 +80,9 @@ int arch_decode_instruction(struct objtool_file *file, const
struct section *sec
unsigned long arch_jump_destination(struct instruction *insn)
{
+ if (insn->immediate & 2)
+ return insn->immediate & ~2;
+
return insn->offset + insn->immediate;
}
--
2.47.0
