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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-04-24 15:40:43 -0500 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-05-20 08:30:43 -0500 |
| commit | 9d907f1ae80b8a67d5397e26912b9d56d0b70a02 (patch) | |
| tree | 41f4d1ad71da46105e5eb5de02fbb60416ee5979 /samples | |
| parent | 7c0577f4e609f7278ebd6d21e2de82b42f110944 (diff) | |
| download | lwn-9d907f1ae80b8a67d5397e26912b9d56d0b70a02.tar.gz lwn-9d907f1ae80b8a67d5397e26912b9d56d0b70a02.zip | |
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>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/ftrace/ftrace-direct-modify.c | 4 | ||||
| -rw-r--r-- | samples/ftrace/ftrace-direct-too.c | 2 | ||||
| -rw-r--r-- | samples/ftrace/ftrace-direct.c | 2 |
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" ); |