diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2016-06-06 22:26:10 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-06-14 13:58:27 +1000 |
| commit | f55d966536034d33476fdd43c45d47225344469f (patch) | |
| tree | 65437da4dfbe49e062ffb785c09e3748514a429f /arch/powerpc/include/asm/kprobes.h | |
| parent | ac9cd1709c0be4334fbad4ab610ecb7acceac884 (diff) | |
powerpc: Define and use PPC64_ELF_ABI_v2/v1
We're approaching 20 locations where we need to check for ELF ABI v2.
That's fine, except the logic is a bit awkward, because we have to check
that _CALL_ELF is defined and then what its value is.
So check it once in asm/types.h and define PPC64_ELF_ABI_v2 when ELF ABI
v2 is detected.
We also have a few places where what we're really trying to check is
that we are using the 64-bit v1 ABI, ie. function descriptors. So also
add a #define for that, which simplifies several checks.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/kprobes.h')
| -rw-r--r-- | arch/powerpc/include/asm/kprobes.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/kprobes.h b/arch/powerpc/include/asm/kprobes.h index 039b583db029..2c9759bdb63b 100644 --- a/arch/powerpc/include/asm/kprobes.h +++ b/arch/powerpc/include/asm/kprobes.h @@ -40,8 +40,7 @@ struct kprobe; typedef ppc_opcode_t kprobe_opcode_t; #define MAX_INSN_SIZE 1 -#ifdef CONFIG_PPC64 -#if defined(_CALL_ELF) && _CALL_ELF == 2 +#ifdef PPC64_ELF_ABI_v2 /* PPC64 ABIv2 needs local entry point */ #define kprobe_lookup_name(name, addr) \ { \ @@ -49,7 +48,7 @@ typedef ppc_opcode_t kprobe_opcode_t; if (addr) \ addr = (kprobe_opcode_t *)ppc_function_entry(addr); \ } -#else +#elif defined(PPC64_ELF_ABI_v1) /* * 64bit powerpc ABIv1 uses function descriptors: * - Check for the dot variant of the symbol first. @@ -92,8 +91,7 @@ typedef ppc_opcode_t kprobe_opcode_t; addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \ } \ } -#endif /* defined(_CALL_ELF) && _CALL_ELF == 2 */ -#endif /* CONFIG_PPC64 */ +#endif #define flush_insn_slot(p) do { } while (0) #define kretprobe_blacklist_size 0 |