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objtool,x86: Rewrite LEAVE

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Since we can now have multiple stack-ops per instruction, we don't
need to special case LEAVE and can simply emit the composite
operations.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lkml.kernel.org/r/20210211173627.253273977@infradead.org
This commit is contained in:
Peter Zijlstra
2021-02-09 21:41:13 +01:00
committed by Ingo Molnar
parent 2ee0c36349
commit ffc7e74f36
3 changed files with 13 additions and 26 deletions
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14
tools/objtool/arch/x86/decode.c
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@@ -446,9 +446,17 @@ int arch_decode_instruction(const struct elf *elf, const struct section *sec,
* mov bp, sp
* pop bp
*/
ADD_OP(op)
op->dest.type = OP_DEST_LEAVE;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = CFI_BP;
op->dest.type = OP_DEST_REG;
op->dest.reg = CFI_SP;
}
ADD_OP(op) {
op->src.type = OP_SRC_POP;
op->dest.type = OP_DEST_REG;
op->dest.reg = CFI_BP;
}
break;
case 0xe3: