asm_freebsd_arm.s

Documentation: syscall

     1// Copyright 2012 The Go Authors. All rights reserved.
     2// Use of this source code is governed by a BSD-style
     3// license that can be found in the LICENSE file.
     4
     5#include "textflag.h"
     6#include "funcdata.h"
     7
     8//
     9// System call support for ARM, FreeBSD
    10//
    11
    12// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, errno uintptr);
    13// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr);
    14// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, errno uintptr)
    15
    16TEXT	·Syscall(SB),NOSPLIT,$0-28
    17	BL runtime·entersyscall(SB)
    18	MOVW trap+0(FP), R7 // syscall number
    19	MOVW a1+4(FP), R0 // a1
    20	MOVW a2+8(FP), R1 // a2
    21	MOVW a3+12(FP), R2 // a3
    22	SWI $0 // syscall
    23	MOVW $0, R2
    24	BCS error
    25	MOVW R0, r1+16(FP) // r1
    26	MOVW R1, r2+20(FP) // r2
    27	MOVW R2, err+24(FP) // errno
    28	BL runtime·exitsyscall(SB)
    29	RET
    30error:
    31	MOVW $-1, R3
    32	MOVW R3, r1+16(FP) // r1
    33	MOVW R2, r2+20(FP) // r2
    34	MOVW R0, err+24(FP) // errno
    35	BL runtime·exitsyscall(SB)
    36	RET
    37
    38TEXT	·Syscall6(SB),NOSPLIT,$0-40
    39	BL runtime·entersyscall(SB)
    40	MOVW trap+0(FP), R7 // syscall number
    41	MOVW a1+4(FP), R0 // a1
    42	MOVW a2+8(FP), R1 // a2
    43	MOVW a3+12(FP), R2 // a3
    44	MOVW a4+16(FP), R3 // a4
    45	MOVW R13, R4
    46	MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
    47	SWI $0 // syscall
    48	MOVW R4, R13
    49	MOVW $0, R2
    50	BCS error6
    51	MOVW R0, r1+28(FP) // r1
    52	MOVW R1, r2+32(FP) // r2
    53	MOVW R2, err+36(FP) // errno
    54	BL runtime·exitsyscall(SB)
    55	RET
    56error6:
    57	MOVW $-1, R3
    58	MOVW R3, r1+28(FP) // r1
    59	MOVW R2, r2+32(FP) // r2
    60	MOVW R0, err+36(FP) // errno
    61	BL runtime·exitsyscall(SB)
    62	RET
    63
    64TEXT	·Syscall9(SB),NOSPLIT,$0-52
    65	BL runtime·entersyscall(SB)
    66	MOVW num+0(FP), R7 // syscall number
    67	MOVW a1+4(FP), R0 // a1
    68	MOVW a2+8(FP), R1 // a2
    69	MOVW a3+12(FP), R2 // a3
    70	MOVW a4+16(FP), R3 // a4
    71	MOVW R13, R4
    72	MOVW $a5+20(FP), R13 // a5 to a9 are passed on stack
    73	SWI $0 // syscall
    74	MOVW R4, R13
    75	MOVW $0, R2
    76	BCS error9
    77	MOVW R0, r1+40(FP) // r1
    78	MOVW R1, r2+44(FP) // r2
    79	MOVW R2, err+48(FP) // errno
    80	BL runtime·exitsyscall(SB)
    81	RET
    82error9:
    83	MOVW $-1, R3
    84	MOVW R3, r1+40(FP) // r1
    85	MOVW R2, r2+44(FP) // r2
    86	MOVW R0, err+48(FP) // errno
    87	BL runtime·exitsyscall(SB)
    88	RET
    89
    90TEXT	·RawSyscall(SB),NOSPLIT,$0-28
    91	MOVW trap+0(FP), R7 // syscall number
    92	MOVW a1+4(FP), R0 // a1
    93	MOVW a2+8(FP), R1 // a2
    94	MOVW a3+12(FP), R2 // a3
    95	SWI $0 // syscall
    96	MOVW $0, R2
    97	BCS errorr
    98	MOVW R0, r1+16(FP) // r1
    99	MOVW R1, r2+20(FP) // r2
   100	MOVW R2, err+24(FP) // errno
   101	RET
   102errorr:
   103	MOVW $-1, R3
   104	MOVW R3, r1+16(FP) // r1
   105	MOVW R2, r2+20(FP) // r2
   106	MOVW R0, err+24(FP) // errno
   107	RET
   108
   109TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
   110	MOVW trap+0(FP), R7 // syscall number
   111	MOVW a1+4(FP), R0 // a1
   112	MOVW a2+8(FP), R1 // a2
   113	MOVW a3+12(FP), R2 // a3
   114	MOVW a4+16(FP), R3 // a4
   115	MOVW R13, R4
   116	MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
   117	SWI $0 // syscall
   118	MOVW R4, R13
   119	MOVW $0, R2
   120	BCS errorr6
   121	MOVW R0, r1+28(FP) // r1
   122	MOVW R1, r2+32(FP) // r2
   123	MOVW R2, err+36(FP) // errno
   124	RET
   125errorr6:
   126	MOVW $-1, R3
   127	MOVW R3, r1+28(FP) // r1
   128	MOVW R2, r2+32(FP) // r2
   129	MOVW R0, err+36(FP) // errno
   130	RET
View as plain text