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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-10-13 17:00:14 (GMT) |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-10-13 17:00:14 (GMT) |
| commit | e50226b4b86755e65aef2129e94d952fee3df722 (patch) | |
| tree | d4dd925fc7f5c6fe46b647c8027911190595f014 /arch/arm64/kernel/entry-ftrace.S | |
| parent | e9849777d0e27cdd2902805be51da73e7c79578c (diff) | |
| parent | 25cb62b76430a91cc6195f902e61c2cb84ade622 (diff) | |
| download | linux-e50226b4b86755e65aef2129e94d952fee3df722.tar.xz | |
Merge branch 'linus' into irq/core
Bring in upstream updates for patches which depend on them
Diffstat (limited to 'arch/arm64/kernel/entry-ftrace.S')
| -rw-r--r-- | arch/arm64/kernel/entry-ftrace.S | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S index 08cafc5..0f03a8f 100644 --- a/arch/arm64/kernel/entry-ftrace.S +++ b/arch/arm64/kernel/entry-ftrace.S @@ -178,6 +178,24 @@ ENTRY(ftrace_stub) ENDPROC(ftrace_stub) #ifdef CONFIG_FUNCTION_GRAPH_TRACER + /* save return value regs*/ + .macro save_return_regs + sub sp, sp, #64 + stp x0, x1, [sp] + stp x2, x3, [sp, #16] + stp x4, x5, [sp, #32] + stp x6, x7, [sp, #48] + .endm + + /* restore return value regs*/ + .macro restore_return_regs + ldp x0, x1, [sp] + ldp x2, x3, [sp, #16] + ldp x4, x5, [sp, #32] + ldp x6, x7, [sp, #48] + add sp, sp, #64 + .endm + /* * void ftrace_graph_caller(void) * @@ -204,11 +222,11 @@ ENDPROC(ftrace_graph_caller) * only when CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST is enabled. */ ENTRY(return_to_handler) - str x0, [sp, #-16]! + save_return_regs mov x0, x29 // parent's fp bl ftrace_return_to_handler// addr = ftrace_return_to_hander(fp); mov x30, x0 // restore the original return address - ldr x0, [sp], #16 + restore_return_regs ret END(return_to_handler) #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |