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linux: Add generic syscall implementation
It allows also to remove hppa specific implementation and simplify riscv implementation a bit.
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@ -57,6 +57,26 @@
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#define INTERNAL_SYSCALL_CALL(...) \
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#define INTERNAL_SYSCALL_CALL(...) \
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__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL, __VA_ARGS__)
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__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL, __VA_ARGS__)
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#define __INTERNAL_SYSCALL_NCS0(name) \
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INTERNAL_SYSCALL_NCS (name, 0)
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#define __INTERNAL_SYSCALL_NCS1(name, a1) \
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INTERNAL_SYSCALL_NCS (name, 1, a1)
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#define __INTERNAL_SYSCALL_NCS2(name, a1, a2) \
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INTERNAL_SYSCALL_NCS (name, 2, a1, a2)
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#define __INTERNAL_SYSCALL_NCS3(name, a1, a2, a3) \
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INTERNAL_SYSCALL_NCS (name, 3, a1, a2, a3)
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#define __INTERNAL_SYSCALL_NCS4(name, a1, a2, a3, a4) \
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INTERNAL_SYSCALL_NCS (name, 4, a1, a2, a3, a4)
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#define __INTERNAL_SYSCALL_NCS5(name, a1, a2, a3, a4, a5) \
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INTERNAL_SYSCALL_NCS (name, 5, a1, a2, a3, a4, a5)
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#define __INTERNAL_SYSCALL_NCS6(name, a1, a2, a3, a4, a5, a6) \
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INTERNAL_SYSCALL_NCS (name, 6, a1, a2, a3, a4, a5, a6)
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#define __INTERNAL_SYSCALL_NCS7(name, a1, a2, a3, a4, a5, a6, a7) \
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INTERNAL_SYSCALL_NCS (name, 7, a1, a2, a3, a4, a5, a6, a7)
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#define INTERNAL_SYSCALL_NCS_CALL(...) \
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__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL_NCS, __VA_ARGS__)
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#define __INLINE_SYSCALL0(name) \
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#define __INLINE_SYSCALL0(name) \
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INLINE_SYSCALL (name, 0)
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INLINE_SYSCALL (name, 0)
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#define __INLINE_SYSCALL1(name, a1) \
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#define __INLINE_SYSCALL1(name, a1) \
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@ -1,65 +0,0 @@
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/* Copyright (C) 1997-2021 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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<https://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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/* 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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LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5)
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register unsigned long int __res asm("r28");
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PIC_REG_DEF
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LOAD_REGS_6
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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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@ -24,8 +24,8 @@ syscall (long int syscall_number, long int arg1, long int arg2, long int arg3,
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{
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{
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long int ret;
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long int ret;
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ret = INTERNAL_SYSCALL_NCS (syscall_number, 7, arg1, arg2, arg3, arg4,
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ret = INTERNAL_SYSCALL_NCS_CALL (syscall_number, arg1, arg2, arg3, arg4,
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arg5, arg6, arg7);
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arg5, arg6, arg7);
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if (INTERNAL_SYSCALL_ERROR_P (ret))
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if (INTERNAL_SYSCALL_ERROR_P (ret))
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return __syscall_error (ret);
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return __syscall_error (ret);
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43
sysdeps/unix/sysv/linux/syscall.c
Normal file
43
sysdeps/unix/sysv/linux/syscall.c
Normal file
@ -0,0 +1,43 @@
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/* Indirect system call. Linux generic implementation.
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Copyright (C) 1997-2021 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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<https://www.gnu.org/licenses/>. */
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#include <stdarg.h>
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#include <sysdep.h>
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long int
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syscall (long int number, ...)
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{
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va_list args;
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va_start (args, number);
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long int a0 = va_arg (args, long int);
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long int a1 = va_arg (args, long int);
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long int a2 = va_arg (args, long int);
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long int a3 = va_arg (args, long int);
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long int a4 = va_arg (args, long int);
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long int a5 = va_arg (args, long int);
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va_end (args);
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int r = INTERNAL_SYSCALL_NCS_CALL (number, a0, a1, a2, a3, a4, a5);
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if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (r)))
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{
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__set_errno (-r);
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return -1;
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}
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return r;
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}
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