From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 24 Apr 2020 16:18:58 +0200
Subject: objtool: Remove INSN_STACK
Git-commit: b09fb65e863733e192d4825a285b4b4998969ce0
Patch-mainline: v5.8-rc1
References: bsc#1202396
With the unconditional use of handle_insn_ops(), INSN_STACK has lost
its purpose. Remove it.
Suggested-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200428191659.854203028@infradead.org
Acked-by: Miroslav Benes <mbenes@suse.cz>
---
tools/objtool/arch.h | 1 -
tools/objtool/arch/x86/decode.c | 23 -----------------------
tools/objtool/check.c | 3 ---
3 files changed, 27 deletions(-)
--- a/tools/objtool/arch.h
+++ b/tools/objtool/arch.h
@@ -32,7 +32,6 @@ enum insn_type {
INSN_CALL_DYNAMIC,
INSN_RETURN,
INSN_CONTEXT_SWITCH,
- INSN_STACK,
INSN_BUG,
INSN_NOP,
INSN_OTHER,
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -142,7 +142,6 @@ int arch_decode_instruction(struct elf *
if (rex_w && !rex_b && modrm_mod == 3 && modrm_rm == 4) {
/* add/sub reg, %rsp */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_ADD;
op->src.reg = op_to_cfi_reg[modrm_reg][rex_r];
@@ -155,7 +154,6 @@ int arch_decode_instruction(struct elf *
case 0x50 ... 0x57:
/* push reg */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = op_to_cfi_reg[op1 & 0x7][rex_b];
@@ -167,7 +165,6 @@ int arch_decode_instruction(struct elf *
case 0x58 ... 0x5f:
/* pop reg */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_POP;
op->dest.type = OP_DEST_REG;
@@ -179,7 +176,6 @@ int arch_decode_instruction(struct elf *
case 0x68:
case 0x6a:
/* push immediate */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_CONST;
op->dest.type = OP_DEST_PUSH;
@@ -197,7 +193,6 @@ int arch_decode_instruction(struct elf *
if (modrm == 0xe4) {
/* and imm, %rsp */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_AND;
op->src.reg = CFI_SP;
@@ -216,7 +211,6 @@ int arch_decode_instruction(struct elf *
break;
/* add/sub imm, %rsp */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_ADD;
op->src.reg = CFI_SP;
@@ -230,7 +224,6 @@ int arch_decode_instruction(struct elf *
if (rex_w && !rex_r && modrm_mod == 3 && modrm_reg == 4) {
/* mov %rsp, reg */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = CFI_SP;
@@ -243,7 +236,6 @@ int arch_decode_instruction(struct elf *
if (rex_w && !rex_b && modrm_mod == 3 && modrm_rm == 4) {
/* mov reg, %rsp */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = op_to_cfi_reg[modrm_reg][rex_r];
@@ -259,7 +251,6 @@ int arch_decode_instruction(struct elf *
(modrm_mod == 1 || modrm_mod == 2) && modrm_rm == 5) {
/* mov reg, disp(%rbp) */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = op_to_cfi_reg[modrm_reg][rex_r];
@@ -271,7 +262,6 @@ int arch_decode_instruction(struct elf *
} else if (rex_w && !rex_b && modrm_rm == 4 && sib == 0x24) {
/* mov reg, disp(%rsp) */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG;
op->src.reg = op_to_cfi_reg[modrm_reg][rex_r];
@@ -287,7 +277,6 @@ int arch_decode_instruction(struct elf *
if (rex_w && !rex_b && modrm_mod == 1 && modrm_rm == 5) {
/* mov disp(%rbp), reg */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG_INDIRECT;
op->src.reg = CFI_BP;
@@ -300,7 +289,6 @@ int arch_decode_instruction(struct elf *
modrm_mod != 3 && modrm_rm == 4) {
/* mov disp(%rsp), reg */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_REG_INDIRECT;
op->src.reg = CFI_SP;
@@ -315,7 +303,6 @@ int arch_decode_instruction(struct elf *
case 0x8d:
if (sib == 0x24 && rex_w && !rex_b && !rex_x) {
- *type = INSN_STACK;
ADD_OP(op) {
if (!insn.displacement.value) {
/* lea (%rsp), reg */
@@ -333,7 +320,6 @@ int arch_decode_instruction(struct elf *
} else if (rex == 0x48 && modrm == 0x65) {
/* lea disp(%rbp), %rsp */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_ADD;
op->src.reg = CFI_BP;
@@ -351,7 +337,6 @@ int arch_decode_instruction(struct elf *
* Restoring rsp back to its original value after a
* stack realignment.
*/
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_ADD;
op->src.reg = CFI_R10;
@@ -369,7 +354,6 @@ int arch_decode_instruction(struct elf *
* Restoring rsp back to its original value after a
* stack realignment.
*/
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_ADD;
op->src.reg = CFI_R13;
@@ -383,7 +367,6 @@ int arch_decode_instruction(struct elf *
case 0x8f:
/* pop to mem */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_POP;
op->dest.type = OP_DEST_MEM;
@@ -396,7 +379,6 @@ int arch_decode_instruction(struct elf *
case 0x9c:
/* pushf */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_CONST;
op->dest.type = OP_DEST_PUSH;
@@ -405,7 +387,6 @@ int arch_decode_instruction(struct elf *
case 0x9d:
/* popf */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_POP;
op->dest.type = OP_DEST_MEM;
@@ -437,7 +418,6 @@ int arch_decode_instruction(struct elf *
} else if (op2 == 0xa0 || op2 == 0xa8) {
/* push fs/gs */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_CONST;
op->dest.type = OP_DEST_PUSH;
@@ -446,7 +426,6 @@ int arch_decode_instruction(struct elf *
} else if (op2 == 0xa1 || op2 == 0xa9) {
/* pop fs/gs */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_POP;
op->dest.type = OP_DEST_MEM;
@@ -463,7 +442,6 @@ int arch_decode_instruction(struct elf *
* mov bp, sp
* pop bp
*/
- *type = INSN_STACK;
ADD_OP(op)
op->dest.type = OP_DEST_LEAVE;
@@ -511,7 +489,6 @@ int arch_decode_instruction(struct elf *
else if (modrm_reg == 6) {
/* push from mem */
- *type = INSN_STACK;
ADD_OP(op) {
op->src.type = OP_SRC_CONST;
op->dest.type = OP_DEST_PUSH;
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2056,9 +2056,6 @@ static int validate_branch(struct objtoo
}
return 0;
- case INSN_STACK:
- break;
-
default:
break;
}