| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1997, 1998, 2001, 2003 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 <stdarg.h> |
| 20 | #include <errno.h> |
| 21 | #include <sys/syscall.h> |
| 22 | #include <unistd.h> |
| 23 | |
| 24 | /* HPPA implements syscall() in 'C'; the assembler version would |
| 25 | typically be in syscall.S. Also note that we have INLINE_SYSCALL, |
| 26 | INTERNAL_SYSCALL, and all the generated pure assembly syscall wrappers. |
| 27 | How often the function is used is unknown. */ |
| 28 | |
| 29 | long int |
| 30 | syscall (long int __sysno, ...) |
| 31 | { |
| 32 | /* FIXME: Keep this matching INLINE_SYSCALL for hppa */ |
| 33 | va_list args; |
| 34 | long int arg0, arg1, arg2, arg3, arg4, arg5; |
| 35 | long int __sys_res; |
| 36 | |
| 37 | /* Load varargs */ |
| 38 | va_start (args, __sysno); |
| 39 | arg0 = va_arg (args, long int); |
| 40 | arg1 = va_arg (args, long int); |
| 41 | arg2 = va_arg (args, long int); |
| 42 | arg3 = va_arg (args, long int); |
| 43 | arg4 = va_arg (args, long int); |
| 44 | arg5 = va_arg (args, long int); |
| 45 | va_end (args); |
| 46 | |
| 47 | { |
| 48 | register unsigned long int __res __asm__("r28"); |
| 49 | K_LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5) |
| 50 | __asm__ __volatile__ (K_STW_ASM_PIC |
| 51 | " ble 0x100(%%sr2, %%r0) \n" |
| 52 | " copy %1, %%r20 \n" |
| 53 | K_LDW_ASM_PIC |
| 54 | : "=r" (__res) |
| 55 | : "r" (__sysno) K_ASM_ARGS_6 |
| 56 | : "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_6); |
| 57 | __sys_res = __res; |
| 58 | } |
| 59 | if ((unsigned long int) __sys_res >= (unsigned long int) -4095) |
| 60 | { |
| 61 | __set_errno (-__sys_res); |
| 62 | __sys_res = -1; |
| 63 | } |
| 64 | return __sys_res; |
| 65 | } |