57 lines
1.1 KiB
ArmAsm
57 lines
1.1 KiB
ArmAsm
/*
|
|
* Split from entry_64.S
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/magic.h>
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/ftrace.h>
|
|
#include <asm/ppc-opcode.h>
|
|
#include <asm/export.h>
|
|
|
|
_GLOBAL(mcount)
|
|
_GLOBAL(_mcount)
|
|
EXPORT_SYMBOL(_mcount)
|
|
mflr r12
|
|
mtctr r12
|
|
mtlr r0
|
|
bctr
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
_GLOBAL(return_to_handler)
|
|
/* need to save return values */
|
|
std r4, -32(r1)
|
|
std r3, -24(r1)
|
|
/* save TOC */
|
|
std r2, -16(r1)
|
|
std r31, -8(r1)
|
|
mr r31, r1
|
|
stdu r1, -112(r1)
|
|
|
|
/*
|
|
* We might be called from a module.
|
|
* Switch to our TOC to run inside the core kernel.
|
|
*/
|
|
ld r2, PACATOC(r13)
|
|
|
|
bl ftrace_return_to_handler
|
|
nop
|
|
|
|
/* return value has real return address */
|
|
mtlr r3
|
|
|
|
ld r1, 0(r1)
|
|
ld r4, -32(r1)
|
|
ld r3, -24(r1)
|
|
ld r2, -16(r1)
|
|
ld r31, -8(r1)
|
|
|
|
/* Jump back to real return address */
|
|
blr
|
|
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
|