diff options
| -rw-r--r-- | arch/mips/include/asm/syscall.h | 16 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/ftrace.c | 33 |
3 files changed, 50 insertions, 0 deletions
diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h new file mode 100644 index 000000000000..ab5effdc935d --- /dev/null +++ b/arch/mips/include/asm/syscall.h @@ -0,0 +1,16 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2012 Ralf Baechle <ralf@linux-mips.org> + */ + +#ifndef __ASM_MIPS_SYSCALL_H +#define __ASM_MIPS_SYSCALL_H + +extern const unsigned long sys_call_table[]; +extern const unsigned long sys32_call_table[]; +extern const unsigned long sysn32_call_table[]; + +#endif /* __ASM_MIPS_SYSCALL_H */ diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 4bbece9b3eb4..81773a4508f4 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -35,6 +35,7 @@ obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_MODULES) += mips_ksyms.o module.o obj-$(CONFIG_MODULES_USE_ELF_RELA) += module-rela.o +obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o obj-$(CONFIG_CPU_R4K_FPU) += r4k_fpu.o r4k_switch.o diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index dba90ec0dc38..6e022c44f447 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -11,11 +11,14 @@ #include <linux/uaccess.h> #include <linux/init.h> #include <linux/ftrace.h> +#include <linux/syscalls.h> #include <asm/asm.h> #include <asm/asm-offsets.h> #include <asm/cacheflush.h> +#include <asm/syscall.h> #include <asm/uasm.h> +#include <asm/unistd.h> #include <asm-generic/sections.h> @@ -364,3 +367,33 @@ out: WARN_ON(1); } #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ + +#ifdef CONFIG_FTRACE_SYSCALLS + +#ifdef CONFIG_32BIT +unsigned long __init arch_syscall_addr(int nr) +{ + return (unsigned long)sys_call_table[nr - __NR_O32_Linux]; +} +#endif + +#ifdef CONFIG_64BIT + +unsigned long __init arch_syscall_addr(int nr) +{ +#ifdef CONFIG_MIPS32_N32 + if (nr >= __NR_N32_Linux && nr <= __NR_N32_Linux + __NR_N32_Linux_syscalls) + return (unsigned long)sysn32_call_table[(nr - __NR_N32_Linux) * 2]; +#endif + if (nr >= __NR_64_Linux && nr <= __NR_64_Linux + __NR_64_Linux_syscalls) + return (unsigned long)sys_call_table[nr - __NR_64_Linux]; +#ifdef CONFIG_MIPS32_O32 + if (nr >= __NR_O32_Linux && nr <= __NR_O32_Linux + __NR_O32_Linux_syscalls) + return (unsigned long)sys32_call_table[nr - __NR_O32_Linux]; +#endif + + return (unsigned long) &sys_ni_syscall; +} +#endif + +#endif /* CONFIG_FTRACE_SYSCALLS */ |