diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 9f61fd6..abfc323 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -971,6 +971,28 @@ _GLOBAL(ftrace_graph_caller) _GLOBAL(return_to_handler) /* need to save return values */ + std r4, -24(r1) + std r3, -16(r1) + std r31, -8(r1) + mr r31, r1 + stdu r1, -112(r1) + + bl .ftrace_return_to_handler + nop + + /* return value has real return address */ + mtlr r3 + + ld r1, 0(r1) + ld r4, -24(r1) + ld r3, -16(r1) + ld r31, -8(r1) + + /* Jump back to real return address */ + blr + +_GLOBAL(mod_return_to_handler) + /* need to save return values */ std r4, -32(r1) std r3, -24(r1) /* save TOC */ @@ -979,7 +1001,10 @@ _GLOBAL(return_to_handler) mr r31, r1 stdu r1, -112(r1) - /* update the TOC */ + /* + * We are in a module using the module's TOC. + * Switch to our TOC to run inside the core kernel. + */ LOAD_REG_IMMEDIATE(r4,ftrace_return_to_handler) ld r2, 8(r4) |