58 lines
1.5 KiB
ArmAsm
58 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#include <linux/linkage.h>
|
|
#include <asm/vdso.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/dwarf.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
#define WRAPPER_FRAME_SIZE (STACK_FRAME_OVERHEAD+8)
|
|
|
|
/*
|
|
* Older glibc version called vdso without allocating a stackframe. This wrapper
|
|
* is just used to allocate a stackframe. See
|
|
* https://sourceware.org/git/?p=glibc.git;a=commit;h=478593e6374f3818da39332260dc453cb19cfa1e
|
|
* for details.
|
|
*/
|
|
.macro vdso_func func
|
|
.globl __kernel_\func
|
|
.type __kernel_\func,@function
|
|
__ALIGN
|
|
__kernel_\func:
|
|
CFI_STARTPROC
|
|
aghi %r15,-WRAPPER_FRAME_SIZE
|
|
CFI_DEF_CFA_OFFSET (STACK_FRAME_OVERHEAD + WRAPPER_FRAME_SIZE)
|
|
CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
|
|
stg %r14,STACK_FRAME_OVERHEAD(%r15)
|
|
brasl %r14,__s390_vdso_\func
|
|
lg %r14,STACK_FRAME_OVERHEAD(%r15)
|
|
aghi %r15,WRAPPER_FRAME_SIZE
|
|
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD
|
|
CFI_RESTORE 15
|
|
br %r14
|
|
CFI_ENDPROC
|
|
.size __kernel_\func,.-__kernel_\func
|
|
.endm
|
|
|
|
vdso_func gettimeofday
|
|
vdso_func clock_getres
|
|
vdso_func clock_gettime
|
|
vdso_func getcpu
|
|
|
|
.macro vdso_syscall func,syscall
|
|
.globl __kernel_\func
|
|
.type __kernel_\func,@function
|
|
__ALIGN
|
|
__kernel_\func:
|
|
CFI_STARTPROC
|
|
svc \syscall
|
|
/* Make sure we notice when a syscall returns, which shouldn't happen */
|
|
.word 0
|
|
CFI_ENDPROC
|
|
.size __kernel_\func,.-__kernel_\func
|
|
.endm
|
|
|
|
vdso_syscall restart_syscall,__NR_restart_syscall
|
|
vdso_syscall sigreturn,__NR_sigreturn
|
|
vdso_syscall rt_sigreturn,__NR_rt_sigreturn
|