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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-16 10:29:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-16 10:29:00 -0700 |
| commit | b2ca74d32bba153a1507e6b7e36d3ec8a89311a1 (patch) | |
| tree | 7efc712ce6453a2a9a231bdaf858fbedd35a0c03 /tools/objtool | |
| parent | 8c05f3b965da14e7790711026b32cc10a4c06213 (diff) | |
| parent | 2decec48b0fd28ffdbf4cc684bd04e735f0839dd (diff) | |
| download | linux-b2ca74d32bba153a1507e6b7e36d3ec8a89311a1.tar.gz linux-b2ca74d32bba153a1507e6b7e36d3ec8a89311a1.tar.bz2 linux-b2ca74d32bba153a1507e6b7e36d3ec8a89311a1.zip | |
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core fixes from Ingo Molnar:
"A handful of objtool updates, plus a documentation addition for
__ab_c_size()"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix whitelist documentation typo
objtool: Fix function fallthrough detection
objtool: Don't use ignore flag for fake jumps
overflow.h: Add comment documenting __ab_c_size()
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/Documentation/stack-validation.txt | 2 | ||||
| -rw-r--r-- | tools/objtool/check.c | 11 |
2 files changed, 8 insertions, 5 deletions
diff --git a/tools/objtool/Documentation/stack-validation.txt b/tools/objtool/Documentation/stack-validation.txt index 8df526c80b65..4dd11a554b9b 100644 --- a/tools/objtool/Documentation/stack-validation.txt +++ b/tools/objtool/Documentation/stack-validation.txt @@ -306,7 +306,7 @@ ignore it: - To skip validation of a file, add - OBJECT_FILES_NON_STANDARD_filename.o := n + OBJECT_FILES_NON_STANDARD_filename.o := y to the Makefile. diff --git a/tools/objtool/check.c b/tools/objtool/check.c index ac743a1d53ab..7325d89ccad9 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -28,6 +28,8 @@ #include <linux/hashtable.h> #include <linux/kernel.h> +#define FAKE_JUMP_OFFSET -1 + struct alternative { struct list_head list; struct instruction *insn; @@ -568,7 +570,7 @@ static int add_jump_destinations(struct objtool_file *file) insn->type != INSN_JUMP_UNCONDITIONAL) continue; - if (insn->ignore) + if (insn->ignore || insn->offset == FAKE_JUMP_OFFSET) continue; rela = find_rela_by_dest_range(insn->sec, insn->offset, @@ -745,10 +747,10 @@ static int handle_group_alt(struct objtool_file *file, clear_insn_state(&fake_jump->state); fake_jump->sec = special_alt->new_sec; - fake_jump->offset = -1; + fake_jump->offset = FAKE_JUMP_OFFSET; fake_jump->type = INSN_JUMP_UNCONDITIONAL; fake_jump->jump_dest = list_next_entry(last_orig_insn, list); - fake_jump->ignore = true; + fake_jump->func = orig_insn->func; } if (!special_alt->new_len) { @@ -1957,7 +1959,8 @@ static int validate_branch(struct objtool_file *file, struct instruction *first, return 1; } - func = insn->func ? insn->func->pfunc : NULL; + if (insn->func) + func = insn->func->pfunc; if (func && insn->ignore) { WARN_FUNC("BUG: why am I validating an ignored function?", |