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x86/entry/vdso32: Remove SYSCALL_ENTER_KERNEL macro in sigreturn.S

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A macro SYSCALL_ENTER_KERNEL was defined in sigreturn.S, with the
ability of overriding it. The override capability, however, is not
used anywhere, and the macro name is potentially confusing because it
seems to imply that sysenter/syscall could be used here, which is NOT
true: the sigreturn system calls MUST use int $0x80.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://patch.msgid.link/20251216212606.1325678-6-hpa@zytor.com
This commit is contained in:
H. Peter Anvin 2025-12-16 13:25:59 -08:00 committed by Dave Hansen
parent 6e150b7101
commit 98d3e99651
1 changed files with 2 additions and 6 deletions
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8
arch/x86/entry/vdso/vdso32/sigreturn.S
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@ -3,10 +3,6 @@
#include <asm/unistd_32.h>
#include <asm/asm-offsets.h>
#ifndef SYSCALL_ENTER_KERNEL
#define SYSCALL_ENTER_KERNEL int $0x80
#endif
.text
.globl __kernel_sigreturn
.type __kernel_sigreturn,@function
@ -16,7 +12,7 @@ __kernel_sigreturn:
.LSTART_sigreturn:
popl %eax /* XXX does this mean it needs unwind info? */
movl $__NR_sigreturn, %eax
SYSCALL_ENTER_KERNEL
int $0x80
.LEND_sigreturn:
SYM_INNER_LABEL(vdso32_sigreturn_landing_pad, SYM_L_GLOBAL)
nop
@ -28,7 +24,7 @@ SYM_INNER_LABEL(vdso32_sigreturn_landing_pad, SYM_L_GLOBAL)
__kernel_rt_sigreturn:
.LSTART_rt_sigreturn:
movl $__NR_rt_sigreturn, %eax
SYSCALL_ENTER_KERNEL
int $0x80
.LEND_rt_sigreturn:
SYM_INNER_LABEL(vdso32_rt_sigreturn_landing_pad, SYM_L_GLOBAL)
nop