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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2022-04-18 09:50:35 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-04-22 12:32:03 +0200 |
| commit | c2bdd61c98d915ad2cc1f8cd4661fcda1f1e4c16 (patch) | |
| tree | f86e09989c34e4c66f3bd0f5a889b995f982f8d4 /tools/objtool | |
| parent | 3c6f9f77e6188ca4d283633d66e91b3821a505ae (diff) | |
| download | linux-c2bdd61c98d915ad2cc1f8cd4661fcda1f1e4c16.tar.gz linux-c2bdd61c98d915ad2cc1f8cd4661fcda1f1e4c16.tar.bz2 linux-c2bdd61c98d915ad2cc1f8cd4661fcda1f1e4c16.zip | |
objtool: Extricate sls from stack validation
Extricate sls functionality from validate_branch() so they can be
executed (or ported) independently from each other.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/2545c86ffa5f27497f0d0c542540ad4a4be3c5a5.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 85c288807f2e..27126fff91dc 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -3271,11 +3271,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, switch (insn->type) { case INSN_RETURN: - if (opts.sls && !insn->retpoline_safe && - next_insn && next_insn->type != INSN_TRAP) { - WARN_FUNC("missing int3 after ret", - insn->sec, insn->offset); - } return validate_return(func, insn, &state); case INSN_CALL: @@ -3319,13 +3314,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, break; case INSN_JUMP_DYNAMIC: - if (opts.sls && !insn->retpoline_safe && - next_insn && next_insn->type != INSN_TRAP) { - WARN_FUNC("missing int3 after indirect jump", - insn->sec, insn->offset); - } - - /* fallthrough */ case INSN_JUMP_DYNAMIC_CONDITIONAL: if (is_sibling_call(insn)) { ret = validate_sibling_call(file, insn, &state); @@ -3845,6 +3833,41 @@ static int validate_ibt(struct objtool_file *file) return warnings; } +static int validate_sls(struct objtool_file *file) +{ + struct instruction *insn, *next_insn; + int warnings = 0; + + for_each_insn(file, insn) { + next_insn = next_insn_same_sec(file, insn); + + if (insn->retpoline_safe) + continue; + + switch (insn->type) { + case INSN_RETURN: + if (!next_insn || next_insn->type != INSN_TRAP) { + WARN_FUNC("missing int3 after ret", + insn->sec, insn->offset); + warnings++; + } + + break; + case INSN_JUMP_DYNAMIC: + if (!next_insn || next_insn->type != INSN_TRAP) { + WARN_FUNC("missing int3 after indirect jump", + insn->sec, insn->offset); + warnings++; + } + break; + default: + break; + } + } + + return warnings; +} + static int validate_reachable_instructions(struct objtool_file *file) { struct instruction *insn; @@ -3913,7 +3936,7 @@ int check(struct objtool_file *file) warnings += ret; } - if (opts.stackval || opts.orc || opts.uaccess || opts.sls) { + if (opts.stackval || opts.orc || opts.uaccess) { ret = validate_functions(file); if (ret < 0) goto out; @@ -3939,6 +3962,13 @@ int check(struct objtool_file *file) warnings += ret; } + if (opts.sls) { + ret = validate_sls(file); + if (ret < 0) + goto out; + warnings += ret; + } + ret = create_static_call_sections(file); if (ret < 0) goto out; |