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4ee83a2cfb
Functions in ftrace_32.S are common with PPC64. Reuse the ones defined for PPC64 with slight modification when required. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Squash in fixup diff from Christophe] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5e837fc190504c4ef834272e70d60ae33f175d49.1640017960.git.christophe.leroy@csgroup.eu
78 lines
1.3 KiB
ArmAsm
78 lines
1.3 KiB
ArmAsm
/* 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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#ifdef CONFIG_PPC64
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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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#endif
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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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#ifdef CONFIG_PPC64
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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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#else
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stwu r1, -16(r1)
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stw r3, 8(r1)
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stw r4, 12(r1)
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#endif
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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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#ifdef CONFIG_PPC64
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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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#else
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lwz r3, 8(r1)
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lwz r4, 12(r1)
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addi r1, r1, 16
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#endif
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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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