From f48cb8b48b0b10025ca9c451b9b32cac3fcd33ba Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 14 Nov 2008 20:47:03 -0800 Subject: powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace Impact: Allow 64 bit PowerPC to trace modules with dynamic ftrace This adds code to handle the PPC64 module trampolines, and allows for PPC64 to use dynamic ftrace. Thanks to Paul Mackerras for these updates: - fix the mod and rec->arch.mod NULL checks. - fix to is_bl_op compare. Thanks to Milton Miller for: - finding the nasty race with using two nops, and recommending instead that I use a branch 8 forward. Signed-off-by: Steven Rostedt --- arch/powerpc/include/asm/module.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/powerpc/include/asm/module.h') diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h index e5f14b13ccf0..340bc699b620 100644 --- a/arch/powerpc/include/asm/module.h +++ b/arch/powerpc/include/asm/module.h @@ -34,6 +34,11 @@ struct mod_arch_specific { #ifdef __powerpc64__ unsigned int stubs_section; /* Index of stubs section in module */ unsigned int toc_section; /* What section is the TOC? */ +#ifdef CONFIG_DYNAMIC_FTRACE + unsigned long toc; + unsigned long tramp; +#endif + #else /* Indices of PLT sections within module. */ unsigned int core_plt_section; @@ -68,6 +73,12 @@ struct mod_arch_specific { # endif /* MODULE */ #endif +#ifdef CONFIG_DYNAMIC_FTRACE +# ifdef MODULE + asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous"); +# endif /* MODULE */ +#endif + struct exception_table_entry; void sort_ex_table(struct exception_table_entry *start, -- cgit v1.2.3 From 7cc45e64323c8a1042f56e6a8d1dc982f98d52a8 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Sat, 15 Nov 2008 02:39:05 -0500 Subject: powerpc/ppc32: ftrace, dynamic ftrace to handle modules Impact: add ability to trace modules on 32 bit PowerPC This patch performs the necessary trampoline calls to handle modules with dynamic ftrace on 32 bit PowerPC. Signed-off-by: Steven Rostedt --- arch/powerpc/include/asm/module.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include/asm/module.h') diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h index 340bc699b620..08454880a2c0 100644 --- a/arch/powerpc/include/asm/module.h +++ b/arch/powerpc/include/asm/module.h @@ -39,11 +39,14 @@ struct mod_arch_specific { unsigned long tramp; #endif -#else +#else /* powerpc64 */ /* Indices of PLT sections within module. */ unsigned int core_plt_section; unsigned int init_plt_section; +#ifdef CONFIG_DYNAMIC_FTRACE + unsigned long tramp; #endif +#endif /* powerpc64 */ /* List of BUG addresses, source line numbers and filenames */ struct list_head bug_list; -- cgit v1.2.3