| 1 | /* |
| 2 | * ARM AArch64 sigcode for bsd-user |
| 3 | * |
| 4 | * Copyright (c) 2015 Stacey D. Son |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | #ifndef TARGET_ARCH_SIGTRAMP_H |
| 9 | #define TARGET_ARCH_SIGTRAMP_H |
| 10 | |
| 11 | /* Compare to ENTRY(sigcode) in arm64/arm64/locore.S */ |
| 12 | static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc, |
| 13 | unsigned sys_sigreturn) |
| 14 | { |
| 15 | int i; |
| 16 | uint32_t sys_exit = TARGET_FREEBSD_NR_exit; |
| 17 | |
| 18 | uint32_t sigtramp_code[] = { |
| 19 | /* 1 */ 0x910003e0, /* mov x0, sp */ |
| 20 | /* 2 */ 0x91000000 + (sigf_uc << 10), /* add x0, x0, #SIGF_UC */ |
| 21 | /* 3 */ 0xd2800000 + (sys_sigreturn << 5) + 0x8, /* mov x8, #SYS_sigreturn */ |
| 22 | /* 4 */ 0xd4000001, /* svc #0 */ |
| 23 | /* 5 */ 0xd2800028 + (sys_exit << 5) + 0x8, /* mov x8, #SYS_exit */ |
| 24 | /* 6 */ 0xd4000001, /* svc #0 */ |
| 25 | /* 7 */ 0x17fffffc, /* b -4 */ |
| 26 | /* 8 */ sys_sigreturn, |
| 27 | /* 9 */ sys_exit |
| 28 | }; |
| 29 | |
| 30 | for (i = 0; i < 9; i++) { |
| 31 | tswap32s(&sigtramp_code[i]); |
| 32 | } |
| 33 | |
| 34 | return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); |
| 35 | } |
| 36 | #endif /* TARGET_ARCH_SIGTRAMP_H */ |