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78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdarg.h>
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#include <sysdep.h>
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#include <errno.h>
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extern int __syscall_error(int err_no);
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extern long int syscall (long int __sysno, ...) __THROW;
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/* This routine is jumped to by all the syscall handlers, to stash
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an error number into errno. */
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int
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__syscall_error (int err_no)
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{
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__set_errno (err_no);
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return -1;
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}
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/* HPPA implements syscall() in 'C'; the assembler version would
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typically be in syscall.S. Also note that we have INLINE_SYSCALL,
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INTERNAL_SYSCALL, and all the generated pure assembly syscall wrappers.
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How often the function is used is unknown. */
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long int
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syscall (long int __sysno, ...)
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{
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/* FIXME: Keep this matching INLINE_SYSCALL for hppa */
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va_list args;
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long int arg0, arg1, arg2, arg3, arg4, arg5;
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long int __sys_res;
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/* Load varargs */
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va_start (args, __sysno);
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arg0 = va_arg (args, long int);
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arg1 = va_arg (args, long int);
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arg2 = va_arg (args, long int);
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arg3 = va_arg (args, long int);
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arg4 = va_arg (args, long int);
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arg5 = va_arg (args, long int);
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va_end (args);
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{
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register unsigned long int __res asm("r28");
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PIC_REG_DEF
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LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5)
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asm volatile (SAVE_ASM_PIC
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" ble 0x100(%%sr2, %%r0) \n"
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" copy %1, %%r20 \n"
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LOAD_ASM_PIC
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: "=r" (__res)
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: "r" (__sysno) PIC_REG_USE ASM_ARGS_6
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: "memory", CALL_CLOB_REGS CLOB_ARGS_6);
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__sys_res = __res;
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}
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if ((unsigned long int) __sys_res >= (unsigned long int) -4095)
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{
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__set_errno (-__sys_res);
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__sys_res = -1;
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}
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return __sys_res;
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}
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