diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2019-10-11 13:50:44 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-10-18 09:58:59 +0200 |
| commit | 76dc6d600166de2c0482db95318534e6dc284212 (patch) | |
| tree | a13a9bcd4d310e551034b4184c881a47163cca64 /arch/x86 | |
| parent | 6ec2a968247e51535e08dbbbfc8f53c95a48cde0 (diff) | |
x86/asm/entry: Annotate THUNKs
Place SYM_*_START_NOALIGN and SYM_*_END around the THUNK macro body.
Preserve @function by FUNC (64bit) and CODE (32bit). Given it was not
marked as aligned, use NOALIGN.
The result:
Value Size Type Bind Vis Ndx Name
0000 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_on_thunk
001c 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_off_thunk
0038 24 FUNC GLOBAL DEFAULT 1 lockdep_sys_exit_thunk
0050 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule
0068 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule_notra
The annotation of .L_restore does not generate anything (at the moment).
Here, it just serves documentation purposes (as opening and closing
brackets of functions).
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191011115108.12392-5-jslaby@suse.cz
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/entry/thunk_32.S | 4 | ||||
| -rw-r--r-- | arch/x86/entry/thunk_64.S | 7 |
2 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S index 2713490611a3..e010d4ae11f1 100644 --- a/arch/x86/entry/thunk_32.S +++ b/arch/x86/entry/thunk_32.S @@ -10,8 +10,7 @@ /* put return address in eax (arg1) */ .macro THUNK name, func, put_ret_addr_in_eax=0 - .globl \name -\name: +SYM_CODE_START_NOALIGN(\name) pushl %eax pushl %ecx pushl %edx @@ -27,6 +26,7 @@ popl %eax ret _ASM_NOKPROBE(\name) +SYM_CODE_END(\name) .endm #ifdef CONFIG_TRACE_IRQFLAGS diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S index ea5c4167086c..c5c3b6e86e62 100644 --- a/arch/x86/entry/thunk_64.S +++ b/arch/x86/entry/thunk_64.S @@ -12,7 +12,7 @@ /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ .macro THUNK name, func, put_ret_addr_in_rdi=0 - ENTRY(\name) +SYM_FUNC_START_NOALIGN(\name) pushq %rbp movq %rsp, %rbp @@ -33,7 +33,7 @@ call \func jmp .L_restore - ENDPROC(\name) +SYM_FUNC_END(\name) _ASM_NOKPROBE(\name) .endm @@ -56,7 +56,7 @@ #if defined(CONFIG_TRACE_IRQFLAGS) \ || defined(CONFIG_DEBUG_LOCK_ALLOC) \ || defined(CONFIG_PREEMPTION) -.L_restore: +SYM_CODE_START_LOCAL_NOALIGN(.L_restore) popq %r11 popq %r10 popq %r9 @@ -69,4 +69,5 @@ popq %rbp ret _ASM_NOKPROBE(.L_restore) +SYM_CODE_END(.L_restore) #endif |