mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 09:40:13 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
308 lines
10 KiB
C
308 lines
10 KiB
C
/* Copyright (C) 2000-2022 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/>. */
|
|
|
|
#ifndef _LINUX_MIPS_SYSDEP_H
|
|
#define _LINUX_MIPS_SYSDEP_H 1
|
|
|
|
/* There is some commonality. */
|
|
#include <sysdeps/unix/sysv/linux/mips/sysdep.h>
|
|
#include <sysdeps/unix/sysv/linux/sysdep.h>
|
|
#include <sysdeps/unix/mips/mips64/sysdep.h>
|
|
|
|
#include <tls.h>
|
|
|
|
/* For Linux we can use the system call table in the header file
|
|
/usr/include/asm/unistd.h
|
|
of the kernel. But these symbols do not follow the SYS_* syntax
|
|
so we have to redefine the `SYS_ify' macro here. */
|
|
#undef SYS_ify
|
|
#define SYS_ify(syscall_name) __NR_##syscall_name
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* We don't want the label for the error handler to be visible in the symbol
|
|
table when we define it here. */
|
|
# undef SYSCALL_ERROR_LABEL
|
|
# define SYSCALL_ERROR_LABEL 99b
|
|
|
|
#else /* ! __ASSEMBLER__ */
|
|
|
|
#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL
|
|
#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1
|
|
|
|
#if _MIPS_SIM == _ABIN32
|
|
/* Convert X to a long long, without losing any bits if it is one
|
|
already or warning if it is a 32-bit pointer. */
|
|
# define ARGIFY(X) ((long long int) (__typeof__ ((X) - (X))) (X))
|
|
typedef long long int __syscall_arg_t;
|
|
#else
|
|
# define ARGIFY(X) ((long int) (X))
|
|
typedef long int __syscall_arg_t;
|
|
#endif
|
|
|
|
/* Note that the original Linux syscall restart convention required the
|
|
instruction immediately preceding SYSCALL to initialize $v0 with the
|
|
syscall number. Then if a restart triggered, $v0 would have been
|
|
clobbered by the syscall interrupted, and needed to be reinititalized.
|
|
The kernel would decrement the PC by 4 before switching back to the
|
|
user mode so that $v0 had been reloaded before SYSCALL was executed
|
|
again. This implied the place $v0 was loaded from must have been
|
|
preserved across a syscall, e.g. an immediate, static register, stack
|
|
slot, etc.
|
|
|
|
The convention was relaxed in Linux with a change applied to the kernel
|
|
GIT repository as commit 96187fb0bc30cd7919759d371d810e928048249d, that
|
|
first appeared in the 2.6.36 release. Since then the kernel has had
|
|
code that reloads $v0 upon syscall restart and resumes right at the
|
|
SYSCALL instruction, so no special arrangement is needed anymore.
|
|
|
|
For backwards compatibility with existing kernel binaries we support
|
|
the old convention by choosing the instruction preceding SYSCALL
|
|
carefully. This also means we have to force a 32-bit encoding of the
|
|
microMIPS MOVE instruction if one is used. */
|
|
|
|
#ifdef __mips_micromips
|
|
# define MOVE32 "move32"
|
|
#else
|
|
# define MOVE32 "move"
|
|
#endif
|
|
|
|
#undef INTERNAL_SYSCALL
|
|
#define INTERNAL_SYSCALL(name, nr, args...) \
|
|
internal_syscall##nr ("li\t%0, %2\t\t\t# " #name "\n\t", \
|
|
"IK" (SYS_ify (name)), \
|
|
0, args)
|
|
|
|
#undef INTERNAL_SYSCALL_NCS
|
|
#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
|
|
internal_syscall##nr (MOVE32 "\t%0, %2\n\t", \
|
|
"r" (__s0), \
|
|
number, args)
|
|
|
|
#define internal_syscall0(v0_init, input, number, dummy...) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a3 asm ("$7"); \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set reorder" \
|
|
: "=r" (__v0), "=r" (__a3) \
|
|
: input \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall1(v0_init, input, number, arg1) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a3 asm ("$7"); \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set reorder" \
|
|
: "=r" (__v0), "=r" (__a3) \
|
|
: input, "r" (__a0) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall2(v0_init, input, number, arg1, arg2) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
__syscall_arg_t _arg2 = ARGIFY (arg2); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a1 asm ("$5") = _arg2; \
|
|
register __syscall_arg_t __a3 asm ("$7"); \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set\treorder" \
|
|
: "=r" (__v0), "=r" (__a3) \
|
|
: input, "r" (__a0), "r" (__a1) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall3(v0_init, input, number, arg1, arg2, arg3) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
__syscall_arg_t _arg2 = ARGIFY (arg2); \
|
|
__syscall_arg_t _arg3 = ARGIFY (arg3); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a1 asm ("$5") = _arg2; \
|
|
register __syscall_arg_t __a2 asm ("$6") = _arg3; \
|
|
register __syscall_arg_t __a3 asm ("$7"); \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set\treorder" \
|
|
: "=r" (__v0), "=r" (__a3) \
|
|
: input, "r" (__a0), "r" (__a1), "r" (__a2) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall4(v0_init, input, number, arg1, arg2, arg3, \
|
|
arg4) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
__syscall_arg_t _arg2 = ARGIFY (arg2); \
|
|
__syscall_arg_t _arg3 = ARGIFY (arg3); \
|
|
__syscall_arg_t _arg4 = ARGIFY (arg4); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a1 asm ("$5") = _arg2; \
|
|
register __syscall_arg_t __a2 asm ("$6") = _arg3; \
|
|
register __syscall_arg_t __a3 asm ("$7") = _arg4; \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set\treorder" \
|
|
: "=r" (__v0), "+r" (__a3) \
|
|
: input, "r" (__a0), "r" (__a1), "r" (__a2) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall5(v0_init, input, number, arg1, arg2, arg3, \
|
|
arg4, arg5) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
__syscall_arg_t _arg2 = ARGIFY (arg2); \
|
|
__syscall_arg_t _arg3 = ARGIFY (arg3); \
|
|
__syscall_arg_t _arg4 = ARGIFY (arg4); \
|
|
__syscall_arg_t _arg5 = ARGIFY (arg5); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a1 asm ("$5") = _arg2; \
|
|
register __syscall_arg_t __a2 asm ("$6") = _arg3; \
|
|
register __syscall_arg_t __a3 asm ("$7") = _arg4; \
|
|
register __syscall_arg_t __a4 asm ("$8") = _arg5; \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set\treorder" \
|
|
: "=r" (__v0), "+r" (__a3) \
|
|
: input, "r" (__a0), "r" (__a1), "r" (__a2), "r" (__a4) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#define internal_syscall6(v0_init, input, number, arg1, arg2, arg3, \
|
|
arg4, arg5, arg6) \
|
|
({ \
|
|
long int _sys_result; \
|
|
\
|
|
{ \
|
|
__syscall_arg_t _arg1 = ARGIFY (arg1); \
|
|
__syscall_arg_t _arg2 = ARGIFY (arg2); \
|
|
__syscall_arg_t _arg3 = ARGIFY (arg3); \
|
|
__syscall_arg_t _arg4 = ARGIFY (arg4); \
|
|
__syscall_arg_t _arg5 = ARGIFY (arg5); \
|
|
__syscall_arg_t _arg6 = ARGIFY (arg6); \
|
|
register __syscall_arg_t __s0 asm ("$16") __attribute__ ((unused))\
|
|
= (number); \
|
|
register __syscall_arg_t __v0 asm ("$2"); \
|
|
register __syscall_arg_t __a0 asm ("$4") = _arg1; \
|
|
register __syscall_arg_t __a1 asm ("$5") = _arg2; \
|
|
register __syscall_arg_t __a2 asm ("$6") = _arg3; \
|
|
register __syscall_arg_t __a3 asm ("$7") = _arg4; \
|
|
register __syscall_arg_t __a4 asm ("$8") = _arg5; \
|
|
register __syscall_arg_t __a5 asm ("$9") = _arg6; \
|
|
__asm__ volatile ( \
|
|
".set\tnoreorder\n\t" \
|
|
v0_init \
|
|
"syscall\n\t" \
|
|
".set\treorder" \
|
|
: "=r" (__v0), "+r" (__a3) \
|
|
: input, "r" (__a0), "r" (__a1), "r" (__a2), "r" (__a4), \
|
|
"r" (__a5) \
|
|
: __SYSCALL_CLOBBERS); \
|
|
_sys_result = __a3 != 0 ? -__v0 : __v0; \
|
|
} \
|
|
_sys_result; \
|
|
})
|
|
|
|
#if __mips_isa_rev >= 6
|
|
# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \
|
|
"$14", "$15", "$24", "$25", "memory"
|
|
#else
|
|
# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \
|
|
"$14", "$15", "$24", "$25", "hi", "lo", "memory"
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
/* Pointer mangling is not yet supported for MIPS. */
|
|
#define PTR_MANGLE(var) (void) (var)
|
|
#define PTR_DEMANGLE(var) (void) (var)
|
|
|
|
#endif /* linux/mips/sysdep.h */
|