[PATCH 21/40] trace syscalls, PPC: Add ftrace compat syscall support for PPC64
From: Ian Munsie <hidden>
Date: 2010-06-23 10:09:16
Also in:
lkml
Subsystem:
function hooks (ftrace), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Steven Rostedt, Masami Hiramatsu, Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Ian Munsie <redacted> This patch adds the necessary infrastructure to trace 32bit compat syscalls on PowerPC64. Signed-off-by: Ian Munsie <redacted> --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/unistd.h | 4 ++++ arch/powerpc/kernel/ftrace.c | 7 +++++++ 3 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 0d5c28d..a724c93 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -142,6 +142,7 @@ config PPC select HAVE_PERF_EVENTS select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_SYSCALL_TRACEPOINTS + select HAVE_COMPAT_FTRACE_SYSCALLS if PPC64 config EARLY_PRINTK bool
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index f0a1026..f584b71 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h@@ -353,6 +353,10 @@ #define __NR__exit __NR_exit #define NR_syscalls __NR_syscalls +#ifdef CONFIG_PPC64 +#define NR_syscalls_compat NR_syscalls +#endif + #ifndef __ASSEMBLY__ #include <linux/types.h>
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index f5fadbb..dddbc33 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c@@ -619,3 +619,10 @@ inline bool arch_syscall_match_sym_name(const char *sym, const char *name) return (!strcmp(sym + 4, name + 3)); } #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 */ + +#ifdef CONFIG_COMPAT_FTRACE_SYSCALLS +unsigned long __init arch_compat_syscall_addr(int nr) +{ + return sys_call_table[nr*2+1]; +} +#endif
--
1.7.1