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linux: Add generic syscall implementation

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It allows also to remove hppa specific implementation and simplify
riscv implementation a bit.
This commit is contained in:
Adhemerval Zanella 2021-11-19 15:33:16 -03:00
parent 68007900be
commit 00baddbb93
4 changed files with 65 additions and 67 deletions
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20
sysdeps/unix/sysdep.h
View File

@ -57,6 +57,26 @@
#define INTERNAL_SYSCALL_CALL(...) \
__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL, __VA_ARGS__)
#define __INTERNAL_SYSCALL_NCS0(name) \
INTERNAL_SYSCALL_NCS (name, 0)
#define __INTERNAL_SYSCALL_NCS1(name, a1) \
INTERNAL_SYSCALL_NCS (name, 1, a1)
#define __INTERNAL_SYSCALL_NCS2(name, a1, a2) \
INTERNAL_SYSCALL_NCS (name, 2, a1, a2)
#define __INTERNAL_SYSCALL_NCS3(name, a1, a2, a3) \
INTERNAL_SYSCALL_NCS (name, 3, a1, a2, a3)
#define __INTERNAL_SYSCALL_NCS4(name, a1, a2, a3, a4) \
INTERNAL_SYSCALL_NCS (name, 4, a1, a2, a3, a4)
#define __INTERNAL_SYSCALL_NCS5(name, a1, a2, a3, a4, a5) \
INTERNAL_SYSCALL_NCS (name, 5, a1, a2, a3, a4, a5)
#define __INTERNAL_SYSCALL_NCS6(name, a1, a2, a3, a4, a5, a6) \
INTERNAL_SYSCALL_NCS (name, 6, a1, a2, a3, a4, a5, a6)
#define __INTERNAL_SYSCALL_NCS7(name, a1, a2, a3, a4, a5, a6, a7) \
INTERNAL_SYSCALL_NCS (name, 7, a1, a2, a3, a4, a5, a6, a7)
#define INTERNAL_SYSCALL_NCS_CALL(...) \
__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL_NCS, __VA_ARGS__)
#define __INLINE_SYSCALL0(name) \
INLINE_SYSCALL (name, 0)
#define __INLINE_SYSCALL1(name, a1) \

65
sysdeps/unix/sysv/linux/hppa/syscall.c
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@ -1,65 +0,0 @@
/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <sysdep.h>
#include <errno.h>
/* HPPA implements syscall() in 'C'; the assembler version would
typically be in syscall.S. Also note that we have INLINE_SYSCALL,
INTERNAL_SYSCALL, and all the generated pure assembly syscall wrappers.
How often the function is used is unknown. */
long int
syscall (long int __sysno, ...)
{
/* FIXME: Keep this matching INLINE_SYSCALL for hppa */
va_list args;
long int arg0, arg1, arg2, arg3, arg4, arg5;
long int __sys_res;
/* Load varargs */
va_start (args, __sysno);
arg0 = va_arg (args, long int);
arg1 = va_arg (args, long int);
arg2 = va_arg (args, long int);
arg3 = va_arg (args, long int);
arg4 = va_arg (args, long int);
arg5 = va_arg (args, long int);
va_end (args);
{
LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5)
register unsigned long int __res asm("r28");
PIC_REG_DEF
LOAD_REGS_6
asm volatile (SAVE_ASM_PIC
" ble 0x100(%%sr2, %%r0) \n"
" copy %1, %%r20 \n"
LOAD_ASM_PIC
: "=r" (__res)
: "r" (__sysno) PIC_REG_USE ASM_ARGS_6
: "memory", CALL_CLOB_REGS CLOB_ARGS_6);
__sys_res = __res;
}
if ((unsigned long int) __sys_res >= (unsigned long int) -4095)
{
__set_errno (-__sys_res);
__sys_res = -1;
}
return __sys_res;
}

4
sysdeps/unix/sysv/linux/riscv/syscall.c
View File

@ -24,8 +24,8 @@ syscall (long int syscall_number, long int arg1, long int arg2, long int arg3,
{
long int ret;
ret = INTERNAL_SYSCALL_NCS (syscall_number, 7, arg1, arg2, arg3, arg4,
arg5, arg6, arg7);
ret = INTERNAL_SYSCALL_NCS_CALL (syscall_number, arg1, arg2, arg3, arg4,
arg5, arg6, arg7);
if (INTERNAL_SYSCALL_ERROR_P (ret))
return __syscall_error (ret);

43
sysdeps/unix/sysv/linux/syscall.c Normal file
View File

@ -0,0 +1,43 @@
/* Indirect system call. Linux generic implementation.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <sysdep.h>
long int
syscall (long int number, ...)
{
va_list args;
va_start (args, number);
long int a0 = va_arg (args, long int);
long int a1 = va_arg (args, long int);
long int a2 = va_arg (args, long int);
long int a3 = va_arg (args, long int);
long int a4 = va_arg (args, long int);
long int a5 = va_arg (args, long int);
va_end (args);
int r = INTERNAL_SYSCALL_NCS_CALL (number, a0, a1, a2, a3, a4, a5);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (r)))
{
__set_errno (-r);
return -1;
}
return r;
}