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glibc/sysdeps/unix/sysv/linux/alpha/sysdep.h
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

359 lines
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/* Copyright (C) 1992-2021 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/>. */
#ifndef _LINUX_ALPHA_SYSDEP_H
#define _LINUX_ALPHA_SYSDEP_H 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/sysdep.h>
#include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
#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
#define SINGLE_THREAD_BY_GLOBAL 1
#ifdef __ASSEMBLER__
#include <asm/pal.h>
#include <alpha/regdef.h>
#define __LABEL(x) x##:
#define LEAF(name, framesize) \
.globl name; \
.align 4; \
.ent name, 0; \
__LABEL(name) \
.frame sp, framesize, ra
#define ENTRY(name) \
.globl name; \
.align 4; \
.ent name, 0; \
__LABEL(name) \
.frame sp, 0, ra
/* Mark the end of function SYM. */
#undef END
#define END(sym) .end sym
#ifdef PROF
# define PSEUDO_PROF \
.set noat; \
lda AT, _mcount; \
jsr AT, (AT), _mcount; \
.set at
#else
# define PSEUDO_PROF
#endif
#ifdef PROF
# define PSEUDO_PROLOGUE \
.frame sp, 0, ra; \
ldgp gp,0(pv); \
PSEUDO_PROF; \
.prologue 1
#elif defined PIC
# define PSEUDO_PROLOGUE \
.frame sp, 0, ra; \
.prologue 0
#else
# define PSEUDO_PROLOGUE \
.frame sp, 0, ra; \
ldgp gp,0(pv); \
.prologue 1
#endif /* PROF */
#ifdef PROF
# define USEPV_PROF std
#else
# define USEPV_PROF no
#endif
#undef SYSCALL_ERROR_LABEL
#if RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_LABEL $syscall_error
# define SYSCALL_ERROR_HANDLER \
$syscall_error: \
stl v0, rtld_errno(gp) !gprel; \
lda v0, -1; \
ret
# define SYSCALL_ERROR_FALLTHRU
#elif defined(PIC)
# define SYSCALL_ERROR_LABEL __syscall_error !samegp
# define SYSCALL_ERROR_HANDLER
# define SYSCALL_ERROR_FALLTHRU br SYSCALL_ERROR_LABEL
#else
# define SYSCALL_ERROR_LABEL $syscall_error
# define SYSCALL_ERROR_HANDLER \
$syscall_error: \
jmp $31, __syscall_error
# define SYSCALL_ERROR_FALLTHRU
#endif /* RTLD_PRIVATE_ERRNO */
/* Overridden by specific syscalls. */
#undef PSEUDO_PREPARE_ARGS
#define PSEUDO_PREPARE_ARGS /* Nothing. */
#define PSEUDO(name, syscall_name, args) \
.globl name; \
.align 4; \
.ent name,0; \
__LABEL(name) \
PSEUDO_PROLOGUE; \
PSEUDO_PREPARE_ARGS \
lda v0, SYS_ify(syscall_name); \
call_pal PAL_callsys; \
bne a3, SYSCALL_ERROR_LABEL
#undef PSEUDO_END
#define PSEUDO_END(sym) \
SYSCALL_ERROR_HANDLER; \
END(sym)
#define PSEUDO_NOERRNO(name, syscall_name, args) \
.globl name; \
.align 4; \
.ent name,0; \
__LABEL(name) \
PSEUDO_PROLOGUE; \
PSEUDO_PREPARE_ARGS \
lda v0, SYS_ify(syscall_name); \
call_pal PAL_callsys;
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(sym) END(sym)
#define ret_NOERRNO ret
#define PSEUDO_ERRVAL(name, syscall_name, args) \
.globl name; \
.align 4; \
.ent name,0; \
__LABEL(name) \
PSEUDO_PROLOGUE; \
PSEUDO_PREPARE_ARGS \
lda v0, SYS_ify(syscall_name); \
call_pal PAL_callsys;
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(sym) END(sym)
#define ret_ERRVAL ret
#define r0 v0
#define r1 a4
#define MOVE(x,y) mov x,y
#else /* !ASSEMBLER */
#define INTERNAL_SYSCALL(name, nr, args...) \
internal_syscall##nr(__NR_##name, args)
#define INTERNAL_SYSCALL_NCS(name, nr, args...) \
internal_syscall##nr(name, args)
/* The normal Alpha calling convention sign-extends 32-bit quantties
no matter what the "real" sign of the 32-bit type. We want to
preserve that when filling in values for the kernel. */
#define syscall_promote(arg) \
(sizeof (arg) == 4 ? (long int)(int)(long int)(arg) : (long int)(arg))
#define internal_syscall_clobbers \
"$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \
"$22", "$23", "$24", "$25", "$27", "$28", "memory"
/* It is moderately important optimization-wise to limit the lifetime
of the hard-register variables as much as possible. Thus we copy
in/out as close to the asm as possible. */
#define internal_syscall0(name, args...) \
({ \
register long int _sc_19 __asm__("$19"); \
register long int _sc_0 = name; \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2" \
: "+v"(_sc_0), "=r"(_sc_19) \
: : internal_syscall_clobbers, \
"$16", "$17", "$18", "$20", "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall1(name,arg1) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_19 __asm__("$19"); \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3" \
: "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16) \
: : internal_syscall_clobbers, \
"$17", "$18", "$20", "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall2(name,arg1,arg2) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _tmp_17 = syscall_promote (arg2); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_17 __asm__("$17") = _tmp_17; \
register long int _sc_19 __asm__("$19"); \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3 %4" \
: "+v"(_sc_0), "=r"(_sc_19), \
"+r"(_sc_16), "+r"(_sc_17) \
: : internal_syscall_clobbers, \
"$18", "$20", "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall3(name,arg1,arg2,arg3) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _tmp_17 = syscall_promote (arg2); \
register long int _tmp_18 = syscall_promote (arg3); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_17 __asm__("$17") = _tmp_17; \
register long int _sc_18 __asm__("$18") = _tmp_18; \
register long int _sc_19 __asm__("$19"); \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3 %4 %5" \
: "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16), \
"+r"(_sc_17), "+r"(_sc_18) \
: : internal_syscall_clobbers, "$20", "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall4(name,arg1,arg2,arg3,arg4) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _tmp_17 = syscall_promote (arg2); \
register long int _tmp_18 = syscall_promote (arg3); \
register long int _tmp_19 = syscall_promote (arg4); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_17 __asm__("$17") = _tmp_17; \
register long int _sc_18 __asm__("$18") = _tmp_18; \
register long int _sc_19 __asm__("$19") = _tmp_19; \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3 %4 %5 %6" \
: "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
"+r"(_sc_17), "+r"(_sc_18) \
: : internal_syscall_clobbers, "$20", "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall5(name,arg1,arg2,arg3,arg4,arg5) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _tmp_17 = syscall_promote (arg2); \
register long int _tmp_18 = syscall_promote (arg3); \
register long int _tmp_19 = syscall_promote (arg4); \
register long int _tmp_20 = syscall_promote (arg5); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_17 __asm__("$17") = _tmp_17; \
register long int _sc_18 __asm__("$18") = _tmp_18; \
register long int _sc_19 __asm__("$19") = _tmp_19; \
register long int _sc_20 __asm__("$20") = _tmp_20; \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \
: "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
"+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20) \
: : internal_syscall_clobbers, "$21"); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#define internal_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
({ \
register long int _tmp_16 = syscall_promote (arg1); \
register long int _tmp_17 = syscall_promote (arg2); \
register long int _tmp_18 = syscall_promote (arg3); \
register long int _tmp_19 = syscall_promote (arg4); \
register long int _tmp_20 = syscall_promote (arg5); \
register long int _tmp_21 = syscall_promote (arg6); \
register long int _sc_0 = name; \
register long int _sc_16 __asm__("$16") = _tmp_16; \
register long int _sc_17 __asm__("$17") = _tmp_17; \
register long int _sc_18 __asm__("$18") = _tmp_18; \
register long int _sc_19 __asm__("$19") = _tmp_19; \
register long int _sc_20 __asm__("$20") = _tmp_20; \
register long int _sc_21 __asm__("$21") = _tmp_21; \
__asm__ __volatile__ \
("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
: "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \
"+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20), \
"+r"(_sc_21) \
: : internal_syscall_clobbers); \
_sc_19 != 0 ? -_sc_0 : _sc_0; \
})
#endif /* ASSEMBLER */
/* Pointer mangling support. Note that tls access is slow enough that
we don't deoptimize things by placing the pointer check value there. */
#ifdef __ASSEMBLER__
# if IS_IN (rtld)
# define PTR_MANGLE(dst, src, tmp) \
ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
xor src, tmp, dst
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# elif defined SHARED
# define PTR_MANGLE(dst, src, tmp) \
ldq tmp, __pointer_chk_guard; \
xor src, tmp, dst
# else
# define PTR_MANGLE(dst, src, tmp) \
ldq tmp, __pointer_chk_guard_local; \
xor src, tmp, dst
# endif
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
#else
# include <stdint.h>
# if (IS_IN (rtld) \
|| (!defined SHARED && (IS_IN (libc) \
|| IS_IN (libpthread))))
extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
# else
extern uintptr_t __pointer_chk_guard attribute_relro;
# define PTR_MANGLE(var) \
(var) = (__typeof(var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
# endif
# define PTR_DEMANGLE(var) PTR_MANGLE(var)
#endif /* ASSEMBLER */
#endif /* _LINUX_ALPHA_SYSDEP_H */
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