diff options
Diffstat (limited to 'src/syscall/asm_openbsd_arm64.s')
| -rw-r--r-- | src/syscall/asm_openbsd_arm64.s | 140 |
1 files changed, 21 insertions, 119 deletions
diff --git a/src/syscall/asm_openbsd_arm64.s b/src/syscall/asm_openbsd_arm64.s index dcbed10cbe..61595a11a3 100644 --- a/src/syscall/asm_openbsd_arm64.s +++ b/src/syscall/asm_openbsd_arm64.s @@ -4,127 +4,29 @@ #include "textflag.h" -// See comment in runtime/sys_openbsd_arm64.s re this construction. -#define INVOKE_SYSCALL \ - SVC; \ - NOOP; \ - NOOP +// +// System call support for ARM64, OpenBSD +// -// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64); -TEXT ·Syscall(SB),NOSPLIT,$0-56 - BL runtime·entersyscall(SB) - MOVD a1+8(FP), R0 - MOVD a2+16(FP), R1 - MOVD a3+24(FP), R2 - MOVD $0, R3 - MOVD $0, R4 - MOVD $0, R5 - MOVD trap+0(FP), R8 // syscall number - INVOKE_SYSCALL - BCC ok - MOVD $-1, R4 - MOVD R4, r1+32(FP) // r1 - MOVD ZR, r2+40(FP) // r2 - MOVD R0, err+48(FP) // errno - BL runtime·exitsyscall(SB) - RET -ok: - MOVD R0, r1+32(FP) // r1 - MOVD R1, r2+40(FP) // r2 - MOVD ZR, err+48(FP) // errno - BL runtime·exitsyscall(SB) - RET +// Provide these function names via assembly so they are provided as ABI0, +// rather than ABIInternal. -TEXT ·Syscall6(SB),NOSPLIT,$0-80 - BL runtime·entersyscall(SB) - MOVD a1+8(FP), R0 - MOVD a2+16(FP), R1 - MOVD a3+24(FP), R2 - MOVD a4+32(FP), R3 - MOVD a5+40(FP), R4 - MOVD a6+48(FP), R5 - MOVD trap+0(FP), R8 // syscall number - INVOKE_SYSCALL - BCC ok - MOVD $-1, R4 - MOVD R4, r1+56(FP) // r1 - MOVD ZR, r2+64(FP) // r2 - MOVD R0, err+72(FP) // errno - BL runtime·exitsyscall(SB) - RET -ok: - MOVD R0, r1+56(FP) // r1 - MOVD R1, r2+64(FP) // r2 - MOVD ZR, err+72(FP) // errno - BL runtime·exitsyscall(SB) - RET +// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) +TEXT ·Syscall(SB),NOSPLIT,$0-56 + JMP ·syscallInternal(SB) -TEXT ·Syscall9(SB),NOSPLIT,$0-104 - BL runtime·entersyscall(SB) - MOVD a1+8(FP), R0 - MOVD a2+16(FP), R1 - MOVD a3+24(FP), R2 - MOVD a4+32(FP), R3 - MOVD a5+40(FP), R4 - MOVD a6+48(FP), R5 - MOVD a7+56(FP), R6 - MOVD a8+64(FP), R7 - MOVD a9+72(FP), R8 // on stack - MOVD R8, 8(RSP) - MOVD num+0(FP), R8 // syscall number - INVOKE_SYSCALL - BCC ok - MOVD $-1, R4 - MOVD R4, r1+80(FP) // r1 - MOVD ZR, r2+88(FP) // r2 - MOVD R0, err+96(FP) // errno - BL runtime·exitsyscall(SB) - RET -ok: - MOVD R0, r1+80(FP) // r1 - MOVD R1, r2+88(FP) // r2 - MOVD ZR, err+96(FP) // errno - BL runtime·exitsyscall(SB) - RET +// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) +TEXT ·Syscall6(SB),NOSPLIT,$0-80 + JMP ·syscall6Internal(SB) -TEXT ·RawSyscall(SB),NOSPLIT,$0-56 - MOVD a1+8(FP), R0 - MOVD a2+16(FP), R1 - MOVD a3+24(FP), R2 - MOVD $0, R3 - MOVD $0, R4 - MOVD $0, R5 - MOVD trap+0(FP), R8 // syscall number - INVOKE_SYSCALL - BCC ok - MOVD $-1, R4 - MOVD R4, r1+32(FP) // r1 - MOVD ZR, r2+40(FP) // r2 - MOVD R0, err+48(FP) // errno - RET -ok: - MOVD R0, r1+32(FP) // r1 - MOVD R1, r2+40(FP) // r2 - MOVD ZR, err+48(FP) // errno - RET +// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) +TEXT ·RawSyscall(SB),NOSPLIT,$0-56 + JMP ·rawSyscallInternal(SB) -TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 - MOVD a1+8(FP), R0 - MOVD a2+16(FP), R1 - MOVD a3+24(FP), R2 - MOVD a4+32(FP), R3 - MOVD a5+40(FP), R4 - MOVD a6+48(FP), R5 - MOVD trap+0(FP), R8 // syscall number - INVOKE_SYSCALL - BCC ok - MOVD $-1, R4 - MOVD R4, r1+56(FP) // r1 - MOVD ZR, r2+64(FP) // r2 - MOVD R0, err+72(FP) // errno - RET -ok: - MOVD R0, r1+56(FP) // r1 - MOVD R1, r2+64(FP) // r2 - MOVD ZR, err+72(FP) // errno - RET +// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) +TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 + JMP ·rawSyscall6Internal(SB) + +// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) +TEXT ·Syscall9(SB),NOSPLIT,$0-104 + JMP ·syscall9Internal(SB) |