| Message ID | 20240808175552.40661-1-rysulliv@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] powerpc/ftrace: restore caller's toc on ppc64 livepatch sibling call | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
| snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 5 jobs. |
| snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 21 jobs. |
diff --git a/arch/powerpc/kernel/trace/ftrace_entry.S b/arch/powerpc/kernel/trace/ftrace_entry.S index 76dbe9fd2c0f..4dfbe6076ad1 100644 --- a/arch/powerpc/kernel/trace/ftrace_entry.S +++ b/arch/powerpc/kernel/trace/ftrace_entry.S @@ -244,6 +244,9 @@ livepatch_handler: mtlr r12 ld r2, -24(r11) + /* Restore toc to caller's stack in case of sibling call */ + std r2, 24(r1) + /* Pop livepatch stack frame */ ld r12, PACA_THREAD_INFO(r13) subi r11, r11, 24
Restores caller's toc pointer to r2, on a sibling call this will uncorrupt the caller's toc pointer and otherwise will be redundant Signed-off-by: Ryan Sullivan <rysulliv@redhat.com> --- arch/powerpc/kernel/trace/ftrace_entry.S | 3 +++ 1 file changed, 3 insertions(+)