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| author | Donglin Peng <pengdonglin@sangfor.com.cn> | 2023-04-08 14:42:21 +0200 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-06-21 00:38:38 +0200 |
| commit | 5779e3c0f5aed8a3239839ad55ad017e1278ecd7 (patch) | |
| tree | 5566d12519150556e347901819addc0b77cb92e4 /arch/loongarch/kernel/asm-offsets.c | |
| parent | x86/ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL (diff) | |
| download | linux-5779e3c0f5aed8a3239839ad55ad017e1278ecd7.tar.xz linux-5779e3c0f5aed8a3239839ad55ad017e1278ecd7.zip | |
LoongArch: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL
The previous patch ("function_graph: Support recording and printing
the return value of function") has laid the groundwork for the for
the funcgraph-retval, and this modification makes it available on
the LoongArch platform.
We introduce a new structure called fgraph_ret_regs for the LoongArch
platform to hold return registers and the frame pointer. We then fill
its content in the return_to_handler and pass its address to the
function ftrace_return_to_handler to record the return value.
Link: https://lkml.kernel.org/r/c5462255e435fab363895c2d7433bc0f5a140411.1680954589.git.pengdonglin@sangfor.com.cn
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Donglin Peng <pengdonglin@sangfor.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'arch/loongarch/kernel/asm-offsets.c')
| -rw-r--r-- | arch/loongarch/kernel/asm-offsets.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/asm-offsets.c b/arch/loongarch/kernel/asm-offsets.c index 4bdb203fc66e..505e4bf59603 100644 --- a/arch/loongarch/kernel/asm-offsets.c +++ b/arch/loongarch/kernel/asm-offsets.c @@ -12,6 +12,7 @@ #include <asm/cpu-info.h> #include <asm/ptrace.h> #include <asm/processor.h> +#include <asm/ftrace.h> void output_ptreg_defines(void) { @@ -264,7 +265,7 @@ void output_smpboot_defines(void) #ifdef CONFIG_HIBERNATION void output_pbe_defines(void) { - COMMENT(" Linux struct pbe offsets. "); + COMMENT("Linux struct pbe offsets."); OFFSET(PBE_ADDRESS, pbe, address); OFFSET(PBE_ORIG_ADDRESS, pbe, orig_address); OFFSET(PBE_NEXT, pbe, next); @@ -272,3 +273,15 @@ void output_pbe_defines(void) BLANK(); } #endif + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +void output_fgraph_ret_regs_defines(void) +{ + COMMENT("LoongArch fgraph_ret_regs offsets."); + OFFSET(FGRET_REGS_A0, fgraph_ret_regs, regs[0]); + OFFSET(FGRET_REGS_A1, fgraph_ret_regs, regs[1]); + OFFSET(FGRET_REGS_FP, fgraph_ret_regs, fp); + DEFINE(FGRET_REGS_SIZE, sizeof(struct fgraph_ret_regs)); + BLANK(); +} +#endif |