| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1996, 1997 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, write to the Free |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | 02111-1307 USA. */ |
| 18 | |
| 19 | #include <features.h> |
| 20 | #include <sys/asm.h> |
| 21 | #include <sys/regdef.h> |
| 22 | |
| 23 | #ifdef __PIC__ |
| 24 | .option pic2 |
| 25 | #endif |
| 26 | .text |
| 27 | .align 2 |
| 28 | .globl syscall |
| 29 | .type syscall,@function |
| 30 | .ent syscall |
| 31 | syscall: |
| 32 | #ifdef __PIC__ |
| 33 | SETUP_GP |
| 34 | #endif |
| 35 | move v0, a0 /* Load system call number from first arg. */ |
| 36 | move a0, a1 /* Move the next three args up a register. */ |
| 37 | move a1, a2 |
| 38 | move a2, a3 |
| 39 | /* Load the remaining possible args (up to 7) from the stack. */ |
| 40 | #ifdef __mips64 |
| 41 | move a3, a4 |
| 42 | move a4, a5 |
| 43 | move a5, a6 |
| 44 | move a6, a7 |
| 45 | daddiu sp,sp,-16 |
| 46 | sd v0,0*8(sp) |
| 47 | ld v0,0*8(sp) /* for system call restarts */ |
| 48 | #else |
| 49 | lw a3,4*4(sp) |
| 50 | lw t0,5*4(sp) |
| 51 | lw t1,6*4(sp) |
| 52 | lw t2,7*4(sp) |
| 53 | addiu sp,sp,-32 |
| 54 | sw t0,4*4(sp) |
| 55 | sw t1,5*4(sp) |
| 56 | sw t2,6*4(sp) |
| 57 | sw v0,7*4(sp) |
| 58 | lw v0,7*4(sp) /* for system call restarts */ |
| 59 | #endif |
| 60 | syscall /* Do the system call. */ |
| 61 | #ifdef __mips64 |
| 62 | daddiu sp,sp,16 |
| 63 | #else |
| 64 | addiu sp,sp,32 |
| 65 | #endif |
| 66 | bnez a3, 1f |
| 67 | j ra /* Return to caller. */ |
| 68 | 1: |
| 69 | move a0,v0 /* Pass return val to C function. */ |
| 70 | |
| 71 | #ifdef __PIC__ |
| 72 | SETUP_GP64(v0, syscall) |
| 73 | PTR_LA t9, __syscall_error |
| 74 | RESTORE_GP64 |
| 75 | jr t9 |
| 76 | #else |
| 77 | j __syscall_error |
| 78 | #endif |
| 79 | .end syscall |
| 80 | .size syscall,.-syscall |