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author | 2020-03-25 14:04:45 +0100 | |
---|---|---|
committer | 2020-04-22 10:53:50 +0200 | |
commit | e7c0219b328c96746767f21b9532eed6a48f61c5 (patch) | |
tree | 1947692e76fbe7f377b5cac9b674fc5027b5c44c /tools/objtool | |
parent | objtool: Rename struct cfi_state (diff) | |
download | linux-e7c0219b328c96746767f21b9532eed6a48f61c5.tar.gz linux-e7c0219b328c96746767f21b9532eed6a48f61c5.tar.bz2 linux-e7c0219b328c96746767f21b9532eed6a48f61c5.zip |
objtool: Fix !CFI insn_state propagation
Objtool keeps per instruction CFI state in struct insn_state and will
save/restore this where required. However, insn_state has grown some
!CFI state, and this must not be saved/restored (that would
loose/destroy state).
Fix this by moving the CFI specific parts of insn_state into struct
cfi_state.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200416115119.045821071@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/objtool')
-rw-r--r-- | tools/objtool/cfi.h | 12 | ||||
-rw-r--r-- | tools/objtool/check.c | 264 | ||||
-rw-r--r-- | tools/objtool/check.h | 13 | ||||
-rw-r--r-- | tools/objtool/orc_gen.c | 8 |
4 files changed, 157 insertions, 140 deletions
diff --git a/tools/objtool/cfi.h b/tools/objtool/cfi.h index 6faf97666d6b..c7c59c6a44ee 100644 --- a/tools/objtool/cfi.h +++ b/tools/objtool/cfi.h @@ -19,8 +19,20 @@ struct cfi_reg { }; struct cfi_init_state { + struct cfi_reg regs[CFI_NUM_REGS]; struct cfi_reg cfa; +}; + +struct cfi_state { struct cfi_reg regs[CFI_NUM_REGS]; + struct cfi_reg vals[CFI_NUM_REGS]; + struct cfi_reg cfa; + int stack_size; + int drap_reg, drap_offset; + unsigned char type; + bool bp_scratch; + bool drap; + bool end; }; #endif /* _OBJTOOL_CFI_H */ diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 538b462fe7ea..abf97159bf1e 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -215,18 +215,23 @@ static bool dead_end_function(struct objtool_file *file, struct symbol *func) return __dead_end_function(file, func, 0); } -static void clear_insn_state(struct insn_state *state) +static void init_cfi_state(struct cfi_state *cfi) { int i; - memset(state, 0, sizeof(*state)); - state->cfa.base = CFI_UNDEFINED; for (i = 0; i < CFI_NUM_REGS; i++) { - state->regs[i].base = CFI_UNDEFINED; - state->vals[i].base = CFI_UNDEFINED; + cfi->regs[i].base = CFI_UNDEFINED; + cfi->vals[i].base = CFI_UNDEFINED; } - state->drap_reg = CFI_UNDEFINED; - state->drap_offset = -1; + cfi->cfa.base = CFI_UNDEFINED; + cfi->drap_reg = CFI_UNDEFINED; + cfi->drap_offset = -1; +} + +static void clear_insn_state(struct insn_state *state) +{ + memset(state, 0, sizeof(*state)); + init_cfi_state(&state->cfi); } /* @@ -261,7 +266,7 @@ static int decode_instructions(struct objtool_file *file) memset(insn, 0, sizeof(*insn)); INIT_LIST_HEAD(&insn->alts); INIT_LIST_HEAD(&insn->stack_ops); - clear_insn_state(&insn->state); + init_cfi_state(&insn->cfi); insn->sec = sec; insn->offset = offset; @@ -756,7 +761,7 @@ static int handle_group_alt(struct objtool_file *file, memset(fake_jump, 0, sizeof(*fake_jump)); INIT_LIST_HEAD(&fake_jump->alts); INIT_LIST_HEAD(&fake_jump->stack_ops); - clear_insn_state(&fake_jump->state); + init_cfi_state(&fake_jump->cfi); fake_jump->sec = special_alt->new_sec; fake_jump->offset = FAKE_JUMP_OFFSET; @@ -1252,7 +1257,7 @@ static int read_unwind_hints(struct objtool_file *file) return -1; } - cfa = &insn->state.cfa; + cfa = &insn->cfi.cfa; if (hint->type == UNWIND_HINT_TYPE_RET_OFFSET) { insn->ret_offset = hint->sp_offset; @@ -1293,8 +1298,8 @@ static int read_unwind_hints(struct objtool_file *file) } cfa->offset = hint->sp_offset; - insn->state.type = hint->type; - insn->state.end = hint->end; + insn->cfi.type = hint->type; + insn->cfi.end = hint->end; } return 0; @@ -1422,20 +1427,21 @@ static bool is_fentry_call(struct instruction *insn) static bool has_modified_stack_frame(struct instruction *insn, struct insn_state *state) { u8 ret_offset = insn->ret_offset; + struct cfi_state *cfi = &state->cfi; int i; - if (state->cfa.base != initial_func_cfi.cfa.base || state->drap) + if (cfi->cfa.base != initial_func_cfi.cfa.base || cfi->drap) return true; - if (state->cfa.offset != initial_func_cfi.cfa.offset + ret_offset) + if (cfi->cfa.offset != initial_func_cfi.cfa.offset + ret_offset) return true; - if (state->stack_size != initial_func_cfi.cfa.offset + ret_offset) + if (cfi->stack_size != initial_func_cfi.cfa.offset + ret_offset) return true; for (i = 0; i < CFI_NUM_REGS; i++) { - if (state->regs[i].base != initial_func_cfi.regs[i].base || - state->regs[i].offset != initial_func_cfi.regs[i].offset) + if (cfi->regs[i].base != initial_func_cfi.regs[i].base || + cfi->regs[i].offset != initial_func_cfi.regs[i].offset) return true; } @@ -1444,21 +1450,23 @@ static bool has_modified_stack_frame(struct instruction *insn, struct insn_state static bool has_valid_stack_frame(struct insn_state *state) { - if (state->cfa.base == CFI_BP && state->regs[CFI_BP].base == CFI_CFA && - state->regs[CFI_BP].offset == -16) + struct cfi_state *cfi = &state->cfi; + + if (cfi->cfa.base == CFI_BP && cfi->regs[CFI_BP].base == CFI_CFA && + cfi->regs[CFI_BP].offset == -16) return true; - if (state->drap && state->regs[CFI_BP].base == CFI_BP) + if (cfi->drap && cfi->regs[CFI_BP].base == CFI_BP) return true; return false; } -static int update_insn_state_regs(struct instruction *insn, - struct insn_state *state, +static int update_cfi_state_regs(struct instruction *insn, + struct cfi_state *cfi, struct stack_op *op) { - struct cfi_reg *cfa = &state->cfa; + struct cfi_reg *cfa = &cfi->cfa; if (cfa->base != CFI_SP) return 0; @@ -1479,20 +1487,19 @@ static int update_insn_state_regs(struct instruction *insn, return 0; } -static void save_reg(struct insn_state *state, unsigned char reg, int base, - int offset) +static void save_reg(struct cfi_state *cfi, unsigned char reg, int base, int offset) { if (arch_callee_saved_reg(reg) && - state->regs[reg].base == CFI_UNDEFINED) { - state->regs[reg].base = base; - state->regs[reg].offset = offset; + cfi->regs[reg].base == CFI_UNDEFINED) { + cfi->regs[reg].base = base; + cfi->regs[reg].offset = offset; } } -static void restore_reg(struct insn_state *state, unsigned char reg) +static void restore_reg(struct cfi_state *cfi, unsigned char reg) { - state->regs[reg].base = initial_func_cfi.regs[reg].base; - state->regs[reg].offset = initial_func_cfi.regs[reg].offset; + cfi->regs[reg].base = initial_func_cfi.regs[reg].base; + cfi->regs[reg].offset = initial_func_cfi.regs[reg].offset; } /* @@ -1548,11 +1555,11 @@ static void restore_reg(struct insn_state *state, unsigned char reg) * 41 5d pop %r13 * c3 retq */ -static int update_insn_state(struct instruction *insn, struct insn_state *state, +static int update_cfi_state(struct instruction *insn, struct cfi_state *cfi, struct stack_op *op) { - struct cfi_reg *cfa = &state->cfa; - struct cfi_reg *regs = state->regs; + struct cfi_reg *cfa = &cfi->cfa; + struct cfi_reg *regs = cfi->regs; /* stack operations don't make sense with an undefined CFA */ if (cfa->base == CFI_UNDEFINED) { @@ -1563,8 +1570,8 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, return 0; } - if (state->type == ORC_TYPE_REGS || state->type == ORC_TYPE_REGS_IRET) - return update_insn_state_regs(insn, state, op); + if (cfi->type == ORC_TYPE_REGS || cfi->type == ORC_TYPE_REGS_IRET) + return update_cfi_state_regs(insn, cfi, op); switch (op->dest.type) { @@ -1579,16 +1586,16 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, /* mov %rsp, %rbp */ cfa->base = op->dest.reg; - state->bp_scratch = false; + cfi->bp_scratch = false; } else if (op->src.reg == CFI_SP && - op->dest.reg == CFI_BP && state->drap) { + op->dest.reg == CFI_BP && cfi->drap) { /* drap: mov %rsp, %rbp */ regs[CFI_BP].base = CFI_BP; - regs[CFI_BP].offset = -state->stack_size; - state->bp_scratch = false; + regs[CFI_BP].offset = -cfi->stack_size; + cfi->bp_scratch = false; } else if (op->src.reg == CFI_SP && cfa->base == CFI_SP) { @@ -1603,8 +1610,8 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, * ... * mov %rax, %rsp */ - state->vals[op->dest.reg].base = CFI_CFA; - state->vals[op->dest.reg].offset = -state->stack_size; + cfi->vals[op->dest.reg].base = CFI_CFA; + cfi->vals[op->dest.reg].offset = -cfi->stack_size; } else if (op->src.reg == CFI_BP && op->dest.reg == CFI_SP && @@ -1615,14 +1622,14 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, * * Restore the original stack pointer (Clang). */ - state->stack_size = -state->regs[CFI_BP].offset; + cfi->stack_size = -cfi->regs[CFI_BP].offset; } else if (op->dest.reg == cfa->base) { /* mov %reg, %rsp */ if (cfa->base == CFI_SP && - state->vals[op->src.reg].base == CFI_CFA) { + cfi->vals[op->src.reg].base == CFI_CFA) { /* * This is needed for the rare case @@ -1632,8 +1639,8 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, * ... * mov %rcx, %rsp */ - cfa->offset = -state->vals[op->src.reg].offset; - state->stack_size = cfa->offset; + cfa->offset = -cfi->vals[op->src.reg].offset; + cfi->stack_size = cfa->offset; } else { cfa->base = CFI_UNDEFINED; @@ -1647,7 +1654,7 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, if (op->dest.reg == CFI_SP && op->src.reg == CFI_SP) { /* add imm, %rsp */ - state->stack_size -= op->src.offset; + cfi->stack_size -= op->src.offset; if (cfa->base == CFI_SP) cfa->offset -= op->src.offset; break; @@ -1656,14 +1663,14 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, if (op->dest.reg == CFI_SP && op->src.reg == CFI_BP) { /* lea disp(%rbp), %rsp */ - state->stack_size = -(op->src.offset + regs[CFI_BP].offset); + cfi->stack_size = -(op->src.offset + regs[CFI_BP].offset); break; } if (op->src.reg == CFI_SP && cfa->base == CFI_SP) { /* drap: lea disp(%rsp), %drap */ - state->drap_reg = op->dest.reg; + cfi->drap_reg = op->dest.reg; /* * lea disp(%rsp), %reg @@ -1675,25 +1682,25 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, * ... * mov %rcx, %rsp */ - state->vals[op->dest.reg].base = CFI_CFA; - state->vals[op->dest.reg].offset = \ - -state->stack_size + op->src.offset; + cfi->vals[op->dest.reg].base = CFI_CFA; + cfi->vals[op->dest.reg].offset = \ + -cfi->stack_size + op->src.offset; break; } - if (state->drap && op->dest.reg == CFI_SP && - op->src.reg == state->drap_reg) { + if (cfi->drap && op->dest.reg == CFI_SP && + op->src.reg == cfi->drap_reg) { /* drap: lea disp(%drap), %rsp */ cfa->base = CFI_SP; - cfa->offset = state->stack_size = -op->src.offset; - state->drap_reg = CFI_UNDEFINED; - state->drap = false; + cfa->offset = cfi->stack_size = -op->src.offset; + cfi->drap_reg = CFI_UNDEFINED; + cfi->drap = false; break; } - if (op->dest.reg == state->cfa.base) { + if (op->dest.reg == cfi->cfa.base) { WARN_FUNC("unsupported stack register modification", insn->sec, insn->offset); return -1; @@ -1703,18 +1710,18 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, case OP_SRC_AND: if (op->dest.reg != CFI_SP || - (state->drap_reg != CFI_UNDEFINED && cfa->base != CFI_SP) || - (state->drap_reg == CFI_UNDEFINED && cfa->base != CFI_BP)) { + (cfi->drap_reg != CFI_UNDEFINED && cfa->base != CFI_SP) || + (cfi->drap_reg == CFI_UNDEFINED && cfa->base != CFI_BP)) { WARN_FUNC("unsupported stack pointer realignment", insn->sec, insn->offset); return -1; } - if (state->drap_reg != CFI_UNDEFINED) { + if (cfi->drap_reg != CFI_UNDEFINED) { /* drap: and imm, %rsp */ - cfa->base = state->drap_reg; - cfa->offset = state->stack_size = 0; - state->drap = true; + cfa->base = cfi->drap_reg; + cfa->offset = cfi->stack_size = 0; + cfi->drap = true; } /* @@ -1726,55 +1733,55 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, case OP_SRC_POP: case OP_SRC_POPF: - if (!state->drap && op->dest.reg == cfa->base) { + if (!cfi->drap && op->dest.reg == cfa->base) { /* pop %rbp */ cfa->base = CFI_SP; } - if (state->drap && cfa->base == CFI_BP_INDIRECT && - op->dest.reg == state->drap_reg && - state->drap_offset == -state->stack_size) { + if (cfi->drap && cfa->base == CFI_BP_INDIRECT && + op->dest.reg == cfi->drap_reg && + cfi->drap_offset == -cfi->stack_size) { /* drap: pop %drap */ - cfa->base = state->drap_reg; + cfa->base = cfi->drap_reg; cfa->offset = 0; - state->drap_offset = -1; + cfi->drap_offset = -1; - } else if (regs[op->dest.reg].offset == -state->stack_size) { + } else if (regs[op->dest.reg].offset == -cfi->stack_size) { /* pop %reg */ - restore_reg(state, op->dest.reg); + restore_reg(cfi, op->dest.reg); } - state->stack_size -= 8; + cfi->stack_size -= 8; if (cfa->base == CFI_SP) cfa->offset -= 8; break; case OP_SRC_REG_INDIRECT: - if (state->drap && op->src.reg == CFI_BP && - op->src.offset == state->drap_offset) { + if (cfi->drap && op->src.reg == CFI_BP && + op->src.offset == cfi->drap_offset) { /* drap: mov disp(%rbp), %drap */ - cfa->base = state->drap_reg; + cfa->base = cfi->drap_reg; cfa->offset = 0; - state->drap_offset = -1; + cfi->drap_offset = -1; } - if (state->drap && op->src.reg == CFI_BP && + if (cfi->drap && op->src.reg == CFI_BP && op->src.offset == regs[op->dest.reg].offset) { /* drap: mov disp(%rbp), %reg */ - restore_reg(state, op->dest.reg); + restore_reg(cfi, op->dest.reg); } else if (op->src.reg == cfa->base && op->src.offset == regs[op->dest.reg].offset + cfa->offset) { /* mov disp(%rbp), %reg */ /* mov disp(%rsp), %reg */ - restore_reg(state, op->dest.reg); + restore_reg(cfi, op->dest.reg); } break; @@ -1789,78 +1796,78 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, case OP_DEST_PUSH: case OP_DEST_PUSHF: - state->stack_size += 8; + cfi->stack_size += 8; if (cfa->base == CFI_SP) cfa->offset += 8; if (op->src.type != OP_SRC_REG) break; - if (state->drap) { - if (op->src.reg == cfa->base && op->src.reg == state->drap_reg) { + if (cfi->drap) { + if (op->src.reg == cfa->base && op->src.reg == cfi->drap_reg) { /* drap: push %drap */ cfa->base = CFI_BP_INDIRECT; - cfa->offset = -state->stack_size; + cfa->offset = -cfi->stack_size; /* save drap so we know when to restore it */ - state->drap_offset = -state->stack_size; + cfi->drap_offset = -cfi->stack_size; - } else if (op->src.reg == CFI_BP && cfa->base == state->drap_reg) { + } else if (op->src.reg == CFI_BP && cfa->base == cfi->drap_reg) { /* drap: push %rbp */ - state->stack_size = 0; + cfi->stack_size = 0; } else if (regs[op->src.reg].base == CFI_UNDEFINED) { /* drap: push %reg */ - save_reg(state, op->src.reg, CFI_BP, -state->stack_size); + save_reg(cfi, op->src.reg, CFI_BP, -cfi->stack_size); } } else { /* push %reg */ - save_reg(state, op->src.reg, CFI_CFA, -state->stack_size); + save_reg(cfi, op->src.reg, CFI_CFA, -cfi->stack_size); } /* detect when asm code uses rbp as a scratch register */ if (!no_fp && insn->func && op->src.reg == CFI_BP && cfa->base != CFI_BP) - state->bp_scratch = true; + cfi->bp_scratch = true; break; case OP_DEST_REG_INDIRECT: - if (state->drap) { - if (op->src.reg == cfa->base && op->src.reg == state->drap_reg) { + if (cfi->drap) { + if (op->src.reg == cfa->base && op->src.reg == cfi->drap_reg) { /* drap: mov %drap, disp(%rbp) */ cfa->base = CFI_BP_INDIRECT; cfa->offset = op->dest.offset; /* save drap offset so we know when to restore it */ - state->drap_offset = op->dest.offset; + cfi->drap_offset = op->dest.offset; } else if (regs[op->src.reg].base == CFI_UNDEFINED) { /* drap: mov reg, disp(%rbp) */ - save_reg(state, op->src.reg, CFI_BP, op->dest.offset); + save_reg(cfi, op->src.reg, CFI_BP, op->dest.offset); } } else if (op->dest.reg == cfa->base) { /* mov reg, disp(%rbp) */ /* mov reg, disp(%rsp) */ - save_reg(state, op->src.reg, CFI_CFA, - op->dest.offset - state->cfa.offset); + save_reg(cfi, op->src.reg, CFI_CFA, + op->dest.offset - cfi->cfa.offset); } break; case OP_DEST_LEAVE: - if ((!state->drap && cfa->base != CFI_BP) || - (state->drap && cfa->base != state->drap_reg)) { + if ((!cfi->drap && cfa->base != CFI_BP) || + (cfi->drap && cfa->base != cfi->drap_reg)) { WARN_FUNC("leave instruction with modified stack frame", insn->sec, insn->offset); return -1; @@ -1868,10 +1875,10 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, /* leave (mov %rbp, %rsp; pop %rbp) */ - state->stack_size = -state->regs[CFI_BP].offset - 8; - restore_reg(state, CFI_BP); + cfi->stack_size = -cfi->regs[CFI_BP].offset - 8; + restore_reg(cfi, CFI_BP); - if (!state->drap) { + if (!cfi->drap) { cfa->base = CFI_SP; cfa->offset -= 8; } @@ -1886,7 +1893,7 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state, } /* pop mem */ - state->stack_size -= 8; + cfi->stack_size -= 8; if (cfa->base == CFI_SP) cfa->offset -= 8; @@ -1908,7 +1915,7 @@ static int handle_insn_ops(struct instruction *insn, struct insn_state *state) list_for_each_entry(op, &insn->stack_ops, list) { int res; - res = update_insn_state(insn, state, op); + res = update_cfi_state(insn, &state->cfi, op); if (res) return res; @@ -1937,41 +1944,44 @@ static int handle_insn_ops(struct instruction *insn, struct insn_state *state) return 0; } -static bool insn_state_match(struct instruction *insn, struct insn_state *state) +static bool insn_cfi_match(struct instruction *insn, struct cfi_state *cfi2) { - struct insn_state *state1 = &insn->state, *state2 = state; + struct cfi_state *cfi1 = &insn->cfi; int i; - if (memcmp(&state1->cfa, &state2->cfa, sizeof(state1->cfa))) { + if (memcmp(&cfi1->cfa, &cfi2->cfa, sizeof(cfi1->cfa))) { + WARN_FUNC("stack state mismatch: cfa1=%d%+d cfa2=%d%+d", insn->sec, insn->offset, - state1->cfa.base, state1->cfa.offset, - state2->cfa.base, state2->cfa.offset); + cfi1->cfa.base, cfi1->cfa.offset, + cfi2->cfa.base, cfi2->cfa.offset); - } else if (memcmp(&state1->regs, &state2->regs, sizeof(state1->regs))) { + } else if (memcmp(&cfi1->regs, &cfi2->regs, sizeof(cfi1->regs))) { for (i = 0; i < CFI_NUM_REGS; i++) { - if (!memcmp(&state1->regs[i], &state2->regs[i], + if (!memcmp(&cfi1->regs[i], &cfi2->regs[i], sizeof(struct cfi_reg))) continue; WARN_FUNC("stack state mismatch: reg1[%d]=%d%+d reg2[%d]=%d%+d", insn->sec, insn->offset, - i, state1->regs[i].base, state1->regs[i].offset, - i, state2->regs[i].base, state2->regs[i].offset); + i, cfi1->regs[i].base, cfi1->regs[i].offset, + i, cfi2->regs[i].base, cfi2->regs[i].offset); break; } - } else if (state1->type != state2->type) { + } else if (cfi1->type != cfi2->type) { + WARN_FUNC("stack state mismatch: type1=%d type2=%d", - insn->sec, insn->offset, state1->type, state2->type); + insn->sec, insn->offset, cfi1->type, cfi2->type); + + } else if (cfi1->drap != cfi2->drap || + (cfi1->drap && cfi1->drap_reg != cfi2->drap_reg) || + (cfi1->drap && cfi1->drap_offset != cfi2->drap_offset)) { - } else if (state1->drap != state2->drap || - (state1->drap && state1->drap_reg != state2->drap_reg) || - (state1->drap && state1->drap_offset != state2->drap_offset)) { WARN_FUNC("stack state mismatch: drap1=%d(%d,%d) drap2=%d(%d,%d)", insn->sec, insn->offset, - state1->drap, state1->drap_reg, state1->drap_offset, - state2->drap, state2->drap_reg, state2->drap_offset); + cfi1->drap, cfi1->drap_reg, cfi1->drap_offset, + cfi2->drap, cfi2->drap_reg, cfi2->drap_offset); } else return true; @@ -2049,7 +2059,7 @@ static int validate_return(struct symbol *func, struct instruction *insn, struct return 1; } - if (state->bp_scratch) { + if (state->cfi.bp_scratch) { WARN_FUNC("BP used as a scratch register", insn->sec, insn->offset); return 1; @@ -2098,7 +2108,7 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, visited = 1 << state.uaccess; if (insn->visited) { - if (!insn->hint && !insn_state_match(insn, &state)) + if (!insn->hint && !insn_cfi_match(insn, &state.cfi)) return 1; if (insn->visited & visited) @@ -2106,9 +2116,9 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, } if (insn->hint) - state = insn->state; + state.cfi = insn->cfi; else - insn->state = state; + insn->cfi = state.cfi; insn->visited |= visited; @@ -2261,7 +2271,7 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, return 0; if (!next_insn) { - if (state.cfa.base == CFI_UNDEFINED) + if (state.cfi.cfa.base == CFI_UNDEFINED) return 0; WARN("%s: unexpected end of section", sec->name); return 1; @@ -2430,10 +2440,10 @@ static int validate_section(struct objtool_file *file, struct section *sec) continue; clear_insn_state(&state); - state.cfa = initial_func_cfi.cfa; - memcpy(&state.regs, &initial_func_cfi.regs, + state.cfi.cfa = initial_func_cfi.cfa; + memcpy(&state.cfi.regs, &initial_func_cfi.regs, CFI_NUM_REGS * sizeof(struct cfi_reg)); - state.stack_size = initial_func_cfi.cfa.offset; + state.cfi.stack_size = initial_func_cfi.cfa.offset; state.uaccess = func->uaccess_safe; diff --git a/tools/objtool/check.h b/tools/objtool/check.h index 7c30760bee74..99413d4ca4b1 100644 --- a/tools/objtool/check.h +++ b/tools/objtool/check.h @@ -14,15 +14,10 @@ #include <linux/hashtable.h> struct insn_state { - struct cfi_reg cfa; - struct cfi_reg regs[CFI_NUM_REGS]; - int stack_size; - unsigned char type; - bool bp_scratch; - bool drap, end, uaccess, df; + struct cfi_state cfi; unsigned int uaccess_stack; - int drap_reg, drap_offset; - struct cfi_reg vals[CFI_NUM_REGS]; + bool uaccess; + bool df; }; struct instruction { @@ -45,7 +40,7 @@ struct instruction { struct list_head alts; struct symbol *func; struct list_head stack_ops; - struct insn_state state; + struct cfi_state cfi; struct orc_entry orc; }; diff --git a/tools/objtool/orc_gen.c b/tools/objtool/orc_gen.c index 4c0dabd28000..2cf640fca01d 100644 --- a/tools/objtool/orc_gen.c +++ b/tools/objtool/orc_gen.c @@ -16,10 +16,10 @@ int create_orc(struct objtool_file *file) for_each_insn(file, insn) { struct orc_entry *orc = &insn->orc; - struct cfi_reg *cfa = &insn->state.cfa; - struct cfi_reg *bp = &insn->state.regs[CFI_BP]; + struct cfi_reg *cfa = &insn->cfi.cfa; + struct cfi_reg *bp = &insn->cfi.regs[CFI_BP]; - orc->end = insn->state.end; + orc->end = insn->cfi.end; if (cfa->base == CFI_UNDEFINED) { orc->sp_reg = ORC_REG_UNDEFINED; @@ -75,7 +75,7 @@ int create_orc(struct objtool_file *file) orc->sp_offset = cfa->offset; orc->bp_offset = bp->offset; - orc->type = insn->state.type; + orc->type = insn->cfi.type; } return 0; |