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| author | Peter Zijlstra <peterz@infradead.org> | 2022-10-27 11:28:13 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-11-01 13:44:10 +0100 |
| commit | 9a479f766be1dd777e12e3e57b6ee4c3028a40a5 (patch) | |
| tree | 5906547109c045bc9b590755b9c1ecd1218769e2 /tools/objtool/builtin-check.c | |
| parent | b341b20d648bb7e9a3307c33163e7399f0913e66 (diff) | |
| download | lwn-9a479f766be1dd777e12e3e57b6ee4c3028a40a5.tar.gz lwn-9a479f766be1dd777e12e3e57b6ee4c3028a40a5.zip | |
objtool: Add --cfi to generate the .cfi_sites section
Add the location of all __cfi_##name symbols (as generated by kCFI) to
a section such that we might re-write things at kernel boot.
Notably; boot time re-hashing and FineIBT are the intended use of
this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221027092842.568039454@infradead.org
Diffstat (limited to 'tools/objtool/builtin-check.c')
| -rw-r--r-- | tools/objtool/builtin-check.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c index 95fcecee60ce..868e3e363786 100644 --- a/tools/objtool/builtin-check.c +++ b/tools/objtool/builtin-check.c @@ -80,6 +80,7 @@ const struct option check_options[] = { OPT_BOOLEAN('s', "stackval", &opts.stackval, "validate frame pointer rules"), OPT_BOOLEAN('t', "static-call", &opts.static_call, "annotate static calls"), OPT_BOOLEAN('u', "uaccess", &opts.uaccess, "validate uaccess rules for SMAP"), + OPT_BOOLEAN(0 , "cfi", &opts.cfi, "annotate kernel control flow integrity (kCFI) function preambles"), OPT_CALLBACK_OPTARG(0, "dump", NULL, NULL, "orc", "dump metadata", parse_dump), OPT_GROUP("Options:"), |