| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Syscall restart trampoline for 32 and 64 bits processes. |
| * |
| * Copyright (C) 2018-2022 Helge Deller <deller@gmx.de> |
| * Copyright (C) 2022 John David Anglin <dave.anglin@bell.net> |
| */ |
| |
| #include <asm/unistd.h> |
| #include <asm/vdso.h> |
| |
| #include <linux/linkage.h> |
| |
| .text |
| |
| ENTRY_CFI(__kernel_restart_syscall) |
| /* |
| * Setup a trampoline to restart the syscall |
| * with __NR_restart_syscall |
| */ |
| |
| /* load return pointer */ |
| #if defined(__VDSO64__) |
| ldd 0(%sp), %r31 |
| #elif defined(__VDSO32__) |
| ldw 0(%sp), %r31 |
| #endif |
| |
| be 0x100(%sr2, %r0) |
| ldi __NR_restart_syscall, %r20 |
| |
| ENDPROC_CFI(__kernel_restart_syscall) |
