| /* 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) |