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64 lines
1.1 KiB
64 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Split from entry_64.S |
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*/ |
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#include <linux/magic.h> |
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#include <asm/ppc_asm.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/ftrace.h> |
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#include <asm/ppc-opcode.h> |
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#include <asm/export.h> |
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.pushsection ".tramp.ftrace.text","aw",@progbits; |
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.globl ftrace_tramp_text |
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ftrace_tramp_text: |
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.space 64 |
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.popsection |
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.pushsection ".tramp.ftrace.init","aw",@progbits; |
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.globl ftrace_tramp_init |
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ftrace_tramp_init: |
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.space 64 |
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.popsection |
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_GLOBAL(mcount) |
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_GLOBAL(_mcount) |
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EXPORT_SYMBOL(_mcount) |
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mflr r12 |
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mtctr r12 |
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mtlr r0 |
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bctr |
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER |
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_GLOBAL(return_to_handler) |
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/* need to save return values */ |
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std r4, -32(r1) |
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std r3, -24(r1) |
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/* save TOC */ |
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std r2, -16(r1) |
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std r31, -8(r1) |
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mr r31, r1 |
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stdu r1, -112(r1) |
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/* |
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* We might be called from a module. |
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* Switch to our TOC to run inside the core kernel. |
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*/ |
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ld r2, PACATOC(r13) |
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bl ftrace_return_to_handler |
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nop |
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/* return value has real return address */ |
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mtlr r3 |
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ld r1, 0(r1) |
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ld r4, -32(r1) |
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ld r3, -24(r1) |
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ld r2, -16(r1) |
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ld r31, -8(r1) |
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/* Jump back to real return address */ |
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blr |
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#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
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