diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-10-14 10:11:45 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-14 10:11:45 +0200 |
| commit | 6edcf57233108df2e50ab5d3fa695ea958b4c779 (patch) | |
| tree | 7f233132de3cf1d438ac5ca51cfa6e9c48f8b86f /tools/objtool/Documentation | |
| parent | 1e4078f0bba46ad61b69548abe6a6faf63b89380 (diff) | |
| parent | 3dd40cb320fee7c23b574ab821ce140ccd1281c9 (diff) | |
| download | lwn-6edcf57233108df2e50ab5d3fa695ea958b4c779.tar.gz lwn-6edcf57233108df2e50ab5d3fa695ea958b4c779.zip | |
Merge branch 'core/urgent' into x86/asm, to pick up dependency
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/objtool/Documentation')
| -rw-r--r-- | tools/objtool/Documentation/stack-validation.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/objtool/Documentation/stack-validation.txt b/tools/objtool/Documentation/stack-validation.txt index 6a1af43862df..3995735a878f 100644 --- a/tools/objtool/Documentation/stack-validation.txt +++ b/tools/objtool/Documentation/stack-validation.txt @@ -194,10 +194,10 @@ they mean, and suggestions for how to fix them. If it's a GCC-compiled .c file, the error may be because the function uses an inline asm() statement which has a "call" instruction. An asm() statement with a call instruction must declare the use of the - stack pointer in its output operand. For example, on x86_64: + stack pointer in its output operand. On x86_64, this means adding + the ASM_CALL_CONSTRAINT as an output constraint: - register void *__sp asm("rsp"); - asm volatile("call func" : "+r" (__sp)); + asm volatile("call func" : ASM_CALL_CONSTRAINT); Otherwise the stack frame may not get created before the call. |