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| author | Nick Desaulniers <ndesaulniers@google.com> | 2026-09-02 14:01:53 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-06 19:03:02 -0700 |
| commit | 4975fb231fcffcd3095b9993e015f5b59b1a3c53 (patch) | |
| tree | c2131911ca7dfeea0b926eebc306293ca2cc3ed9 /scripts/checkstack.pl | |
| parent | 033abd1e9bf99f3004ed1932d4880c3c941c3834 (diff) | |
| download | linux-next-4975fb231fcffcd3095b9993e015f5b59b1a3c53.tar.gz linux-next-4975fb231fcffcd3095b9993e015f5b59b1a3c53.zip | |
scripts/checkstack.pl: support llvm-objdump disassembly for x86
When running `make LLVM=1 checkstack`, OBJDUMP is set to llvm-objdump.
llvm-objdump outputs disassembly with instruction size suffixes (such as
subq/addq/subl/addl), tabs/whitespace differences, spaces after commas,
and trailing comments (e.g. `# imm = 0x...`).
Because scripts/checkstack.pl used rigid regular expressions specifically
tuned to GNU objdump format (e.g. requiring exactly four spaces, no
suffix, and no space after comma), checkstack.pl failed to match any stack
adjustment instructions and yielded no output when using llvm-objdump on
x86.
Update the regular expressions for x86 to match optional suffixes,
variable whitespace, and trailing comments.
Link: https://lore.kernel.org/20260902-checkstack_llvm_objdump-v1-1-edb4eca5f163@google.com
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Assisted-by: LLM Gemini
Cc: Bill Wendling <morbo@google.com>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Diffstat (limited to 'scripts/checkstack.pl')
| -rwxr-xr-x | scripts/checkstack.pl | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl index 14ce31f732ee..f8011e789a9b 100755 --- a/scripts/checkstack.pl +++ b/scripts/checkstack.pl @@ -66,8 +66,10 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack); #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp # or # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp - $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o; - $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/o; + # or + # 0: 48 81 ec e8 05 00 00 subq $0x5e8, %rsp + $re = qr/^.*[as][du][db][ql]?\s+\$(0x$x{1,8}),\s*\%(e|r)sp/o; + $dre = qr/^.*[as][du][db][ql]?\s+(%.*),\s*\%(e|r)sp/o; } elsif ($arch eq 'm68k') { # 2b6c: 4e56 fb70 linkw %fp,#-1168 # 1df770: defc ffe4 addaw #-28,%sp |