diff options
| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2019-09-05 20:20:29 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-09-18 04:24:55 +0200 |
| commit | 370011a27028d6f05e598ed6211a0ca2dc0213f7 (patch) | |
| tree | 9795c67704e2d5d70595e4e61e5517393d40f644 /arch/powerpc/include/asm/ftrace.h | |
| parent | ftrace: Look up the address of return_to_handler() using helpers (diff) | |
| download | linux-370011a27028d6f05e598ed6211a0ca2dc0213f7.tar.xz linux-370011a27028d6f05e598ed6211a0ca2dc0213f7.zip | |
powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
This associates entries in the ftrace_ret_stack with corresponding stack
frames, enabling more robust stack unwinding. Also update the only user
of ftrace_graph_ret_addr() to pass the stack pointer.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0224f2d0971b069c678e2ff678cfc2cd1e114cfe.1567707399.git.naveen.n.rao@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/ftrace.h')
| -rw-r--r-- | arch/powerpc/include/asm/ftrace.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index 3dfb80b86561..f54a08a2cd70 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -8,6 +8,8 @@ #define MCOUNT_ADDR ((unsigned long)(_mcount)) #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ +#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR + #ifdef __ASSEMBLY__ /* Based off of objdump optput from glibc */ |