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- /*
- * 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 */
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