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https://github.com/edk2-porting/linux-next.git
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046199cae7
When remove the -fno-omit-frame-pointer, gcc will not save the frame pointer for us, we need to save one ourselves. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Nicholas Mc Guire <der.herr@hofr.at> Cc: zhangfx@lemote.com Cc: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/679/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive for
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* more details.
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*
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* Copyright (C) 2009 DSLab, Lanzhou University, China
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* Author: Wu Zhangjin <wuzj@lemote.com>
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*/
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#ifndef _ASM_MIPS_FTRACE_H
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#define _ASM_MIPS_FTRACE_H
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((unsigned long)(_mcount))
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#ifndef __ASSEMBLY__
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extern void _mcount(void);
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#define mcount _mcount
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#define safe_load(load, src, dst, error) \
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do { \
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asm volatile ( \
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"1: " load " %[" STR(dst) "], 0(%[" STR(src) "])\n"\
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" li %[" STR(error) "], 0\n" \
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"2:\n" \
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\
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".section .fixup, \"ax\"\n" \
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"3: li %[" STR(error) "], 1\n" \
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" j 2b\n" \
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".previous\n" \
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\
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".section\t__ex_table,\"a\"\n\t" \
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STR(PTR) "\t1b, 3b\n\t" \
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".previous\n" \
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\
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: [dst] "=&r" (dst), [error] "=r" (error)\
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: [src] "r" (src) \
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: "memory" \
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); \
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} while (0)
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#define safe_store(store, src, dst, error) \
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do { \
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asm volatile ( \
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"1: " store " %[" STR(src) "], 0(%[" STR(dst) "])\n"\
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" li %[" STR(error) "], 0\n" \
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"2:\n" \
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\
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".section .fixup, \"ax\"\n" \
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"3: li %[" STR(error) "], 1\n" \
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" j 2b\n" \
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".previous\n" \
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\
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".section\t__ex_table,\"a\"\n\t"\
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STR(PTR) "\t1b, 3b\n\t" \
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".previous\n" \
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\
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: [error] "=r" (error) \
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: [dst] "r" (dst), [src] "r" (src)\
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: "memory" \
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); \
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} while (0)
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#define safe_load_code(dst, src, error) \
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safe_load(STR(lw), src, dst, error)
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#define safe_store_code(src, dst, error) \
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safe_store(STR(sw), src, dst, error)
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#define safe_load_stack(dst, src, error) \
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safe_load(STR(PTR_L), src, dst, error)
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#define safe_store_stack(src, dst, error) \
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safe_store(STR(PTR_S), src, dst, error)
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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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return addr;
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}
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struct dyn_arch_ftrace {
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};
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#endif /* CONFIG_DYNAMIC_FTRACE */
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif /* _ASM_MIPS_FTRACE_H */
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