| /* |
| * s390x linux replacement vdso. |
| * |
| * Copyright 2023 Linaro, Ltd. |
| * |
| * SPDX-License-Identifier: GPL-2.0-or-later |
| */ |
| |
| #include <asm/unistd.h> |
| #include "vdso-asmoffset.h" |
| |
| .macro endf name |
| .globl \name |
| .type \name, @function |
| .size \name, . - \name |
| .endm |
| |
| .macro raw_syscall n |
| .ifne \n < 0x100 |
| svc \n |
| .else |
| lghi %r1, \n |
| svc 0 |
| .endif |
| .endm |
| |
| .macro vdso_syscall name, nr |
| \name: |
| .cfi_startproc |
| aghi %r15, -(STACK_FRAME_OVERHEAD + 16) |
| .cfi_adjust_cfa_offset STACK_FRAME_OVERHEAD + 16 |
| stg %r14, STACK_FRAME_OVERHEAD(%r15) |
| .cfi_rel_offset %r14, STACK_FRAME_OVERHEAD |
| raw_syscall \nr |
| lg %r14, STACK_FRAME_OVERHEAD(%r15) |
| aghi %r15, STACK_FRAME_OVERHEAD + 16 |
| .cfi_restore %r14 |
| .cfi_adjust_cfa_offset -(STACK_FRAME_OVERHEAD + 16) |
| br %r14 |
| .cfi_endproc |
| endf \name |
| .endm |
| |
| vdso_syscall __kernel_gettimeofday, __NR_gettimeofday |
| vdso_syscall __kernel_clock_gettime, __NR_clock_gettime |
| vdso_syscall __kernel_clock_getres, __NR_clock_getres |
| vdso_syscall __kernel_getcpu, __NR_getcpu |
| |
| /* |
| * TODO unwind info, though we're ok without it. |
| * The kernel supplies bogus empty unwind info, and it is likely ignored |
| * by all users. Without it we get the fallback signal frame handling. |
| */ |
| |
| __kernel_sigreturn: |
| raw_syscall __NR_sigreturn |
| endf __kernel_sigreturn |
| |
| __kernel_rt_sigreturn: |
| raw_syscall __NR_rt_sigreturn |
| endf __kernel_rt_sigreturn |
