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authorJosh Poimboeuf <jpoimboe@redhat.com>2020-04-24 23:40:43 +0300
committerJosh Poimboeuf <jpoimboe@redhat.com>2020-05-20 16:30:43 +0300
commit9d907f1ae80b8a67d5397e26912b9d56d0b70a02 (patch)
tree41f4d1ad71da46105e5eb5de02fbb60416ee5979
parent7c0577f4e609f7278ebd6d21e2de82b42f110944 (diff)
downloadlinux-9d907f1ae80b8a67d5397e26912b9d56d0b70a02.tar.xz
samples/ftrace: Fix asm function ELF annotations
Enable objtool coverage for the sample ftrace modules by adding ELF annotations to the asm trampoline functions. samples/ftrace/ftrace-direct.o: warning: objtool: .text+0x0: unreachable instruction samples/ftrace/ftrace-direct-modify.o: warning: objtool: .text+0x0: unreachable instruction samples/ftrace/ftrace-direct-too.o: warning: objtool: .text+0x0: unreachable instruction Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
-rw-r--r--samples/ftrace/ftrace-direct-modify.c4
-rw-r--r--samples/ftrace/ftrace-direct-too.c2
-rw-r--r--samples/ftrace/ftrace-direct.c2
3 files changed, 8 insertions, 0 deletions
diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c
index e04229d21475..c13a5bc5095b 100644
--- a/samples/ftrace/ftrace-direct-modify.c
+++ b/samples/ftrace/ftrace-direct-modify.c
@@ -20,18 +20,22 @@ static unsigned long my_ip = (unsigned long)schedule;
asm (
" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp1, @function\n"
" my_tramp1:"
" pushq %rbp\n"
" movq %rsp, %rbp\n"
" call my_direct_func1\n"
" leave\n"
+" .size my_tramp1, .-my_tramp1\n"
" ret\n"
+" .type my_tramp2, @function\n"
" my_tramp2:"
" pushq %rbp\n"
" movq %rsp, %rbp\n"
" call my_direct_func2\n"
" leave\n"
" ret\n"
+" .size my_tramp2, .-my_tramp2\n"
" .popsection\n"
);
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c
index 27efa5f6ff52..d5c5022be664 100644
--- a/samples/ftrace/ftrace-direct-too.c
+++ b/samples/ftrace/ftrace-direct-too.c
@@ -15,6 +15,7 @@ extern void my_tramp(void *);
asm (
" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
" my_tramp:"
" pushq %rbp\n"
" movq %rsp, %rbp\n"
@@ -27,6 +28,7 @@ asm (
" popq %rdi\n"
" leave\n"
" ret\n"
+" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);
diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c
index a2e3063bd306..63ca06d42c80 100644
--- a/samples/ftrace/ftrace-direct.c
+++ b/samples/ftrace/ftrace-direct.c
@@ -13,6 +13,7 @@ extern void my_tramp(void *);
asm (
" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
" my_tramp:"
" pushq %rbp\n"
" movq %rsp, %rbp\n"
@@ -21,6 +22,7 @@ asm (
" popq %rdi\n"
" leave\n"
" ret\n"
+" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);