mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 22:26:12 +00:00
bf528a3a9b
Impact: clean up Use a macro to save and restore the registers for PowerPC32, since that code is duplicated. This is similar to the work done by Cyrill Gorcunov for the mcount code in x86_64. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
#ifndef _ASM_POWERPC_FTRACE
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#define _ASM_POWERPC_FTRACE
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((long)(_mcount))
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#ifdef __ASSEMBLY__
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/* Based off of objdump optput from glibc */
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#define MCOUNT_SAVE_FRAME \
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stwu r1,-48(r1); \
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stw r3, 12(r1); \
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stw r4, 16(r1); \
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stw r5, 20(r1); \
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stw r6, 24(r1); \
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mflr r3; \
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lwz r4, 52(r1); \
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mfcr r5; \
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stw r7, 28(r1); \
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stw r8, 32(r1); \
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stw r9, 36(r1); \
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stw r10,40(r1); \
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stw r3, 44(r1); \
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stw r5, 8(r1)
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#define MCOUNT_RESTORE_FRAME \
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lwz r6, 8(r1); \
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lwz r0, 44(r1); \
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lwz r3, 12(r1); \
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mtctr r0; \
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lwz r4, 16(r1); \
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mtcr r6; \
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lwz r5, 20(r1); \
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lwz r6, 24(r1); \
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lwz r0, 52(r1); \
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lwz r7, 28(r1); \
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lwz r8, 32(r1); \
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mtlr r0; \
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lwz r9, 36(r1); \
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lwz r10,40(r1); \
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addi r1, r1, 48
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#else /* !__ASSEMBLY__ */
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extern void _mcount(void);
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#ifdef CONFIG_DYNAMIC_FTRACE
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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/* reloction of mcount call site is the same as the address */
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return addr;
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}
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struct dyn_arch_ftrace {
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struct module *mod;
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};
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#endif /* CONFIG_DYNAMIC_FTRACE */
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#endif /* __ASSEMBLY__ */
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#endif
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#endif /* _ASM_POWERPC_FTRACE */
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