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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2022-08-09 15:29:07 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2022-08-10 15:38:16 +1000
commitcb928ac192128c842f4c1cfc8b6780b95719d65f (patch)
tree9438c7d7adcc5331969d9b20791c8697420c1b2d /arch/powerpc
parentpowerpc: Make eh value more explicit when using lwarx (diff)
downloadlinux-dev-cb928ac192128c842f4c1cfc8b6780b95719d65f.tar.xz
linux-dev-cb928ac192128c842f4c1cfc8b6780b95719d65f.zip
powerpc64/ftrace: Fix ftrace for clang builds
Clang doesn't support -mprofile-kernel ABI, so guard the checks against CONFIG_DYNAMIC_FTRACE_WITH_REGS, rather than the elf ABI version. Fixes: 23b44fc248f4 ("powerpc/ftrace: Make __ftrace_make_{nop/call}() common to PPC32 and PPC64") Cc: stable@vger.kernel.org # v5.19+ Reported-by: Nick Desaulniers <ndesaulniers@google.com> Reported-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Tested-by: Ondrej Mosnacek <omosnacek@gmail.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://github.com/llvm/llvm-project/issues/57031 Link: https://github.com/ClangBuiltLinux/linux/issues/1682 Link: https://lore.kernel.org/r/20220809095907.418764-1-naveen.n.rao@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/trace/ftrace.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index cb158c32b50b..7b85c3b460a3 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -393,11 +393,11 @@ int ftrace_make_nop(struct module *mod,
*/
static bool expected_nop_sequence(void *ip, ppc_inst_t op0, ppc_inst_t op1)
{
- if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V1))
+ if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_REGS))
+ return ppc_inst_equal(op0, ppc_inst(PPC_RAW_NOP()));
+ else
return ppc_inst_equal(op0, ppc_inst(PPC_RAW_BRANCH(8))) &&
ppc_inst_equal(op1, ppc_inst(PPC_INST_LD_TOC));
- else
- return ppc_inst_equal(op0, ppc_inst(PPC_RAW_NOP()));
}
static int
@@ -412,7 +412,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
if (copy_inst_from_kernel_nofault(op, ip))
return -EFAULT;
- if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V1) &&
+ if (!IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_REGS) &&
copy_inst_from_kernel_nofault(op + 1, ip + 4))
return -EFAULT;