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glibc/sysdeps/unix/sysv/linux/sh/sysdep.h
Paul Eggert 5a82c74822 Prefer https to http for gnu.org and fsf.org URLs 
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:

sed -ri '
  s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
  s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
  $(find $(git ls-files) -prune -type f \
      ! -name '*.po' \
      ! -name 'ChangeLog*' \
      ! -path COPYING ! -path COPYING.LIB \
      ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
      ! -path manual/texinfo.tex ! -path scripts/config.guess \
      ! -path scripts/config.sub ! -path scripts/install-sh \
      ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
      ! -path INSTALL ! -path  locale/programs/charmap-kw.h \
      ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
      ! '(' -name configure \
            -execdir test -f configure.ac -o -f configure.in ';' ')' \
      ! '(' -name preconfigure \
            -execdir test -f preconfigure.ac ';' ')' \
      -print)

and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:

  chmod a+x sysdeps/unix/sysv/linux/riscv/configure
  # Omit irrelevant whitespace and comment-only changes,
  # perhaps from a slightly-different Autoconf version.
  git checkout -f \
    sysdeps/csky/configure \
    sysdeps/hppa/configure \
    sysdeps/riscv/configure \
    sysdeps/unix/sysv/linux/csky/configure
  # Omit changes that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
  git checkout -f \
    sysdeps/powerpc/powerpc64/ppc-mcount.S \
    sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
  # Omit change that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
  git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 02:43:31 -07:00

361 lines
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/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
Changed by Kaz Kojima, <kkojima@rr.iij4u.or.jp>.
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_SH_SYSDEP_H
#define _LINUX_SH_SYSDEP_H 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/sh/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__
/* Linux uses a negative return value to indicate syscall errors,
unlike most Unices, which use the condition codes' carry flag.
Since version 2.1 the return value of a system call might be
negative even if the call succeeded. E.g., the `lseek' system call
might return a large offset. Therefore we must not anymore test
for < 0, but test for a real error by making sure the value in R0
is a real error number. Linus said he will make sure the no syscall
returns a value in -1 .. -4095 as a valid result so we can savely
test with -4095. */
#define _IMM1 #-1
#define _IMM12 #-12
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (syscall_name, args); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
bf .Lpseudo_end; \
SYSCALL_ERROR_HANDLER; \
.Lpseudo_end:
#undef PSEUDO_END
#define PSEUDO_END(name) \
END (name)
#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (syscall_name, args)
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) \
END (name)
#define ret_NOERRNO ret
#define PSEUDO_ERRVAL(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (syscall_name, args);
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(name) \
END (name)
#define ret_ERRVAL ret
#ifndef PIC
# define SYSCALL_ERROR_HANDLER \
mov.l 0f,r1; \
jmp @r1; \
mov r0,r4; \
.align 2; \
0: .long __syscall_error
#else
# if RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_HANDLER \
neg r0,r1; \
mov r12,r2; \
cfi_register (r12, r2); \
mov.l 0f,r12; \
mova 0f,r0; \
add r0,r12; \
mov.l 1f,r0; \
mov.l r1,@(r0,r12); \
mov r2,r12; \
cfi_restore (r12); \
bra .Lpseudo_end; \
mov _IMM1,r0; \
.align 2; \
0: .long _GLOBAL_OFFSET_TABLE_; \
1: .long rtld_errno@GOTOFF
# elif defined _LIBC_REENTRANT
# if IS_IN (libc)
# define SYSCALL_ERROR_ERRNO __libc_errno
# else
# define SYSCALL_ERROR_ERRNO errno
# endif
# define SYSCALL_ERROR_HANDLER \
neg r0,r1; \
mov r12,r2; \
cfi_register (r12, r2); \
mov.l 0f,r12; \
mova 0f,r0; \
add r0,r12; \
mov.l 1f,r0; \
stc gbr, r4; \
mov.l @(r0,r12),r0; \
mov r2,r12; \
cfi_restore (r12); \
add r4,r0; \
mov.l r1,@r0; \
bra .Lpseudo_end; \
mov _IMM1,r0; \
.align 2; \
0: .long _GLOBAL_OFFSET_TABLE_; \
1: .long SYSCALL_ERROR_ERRNO@GOTTPOFF
# else
/* Store (-r0) into errno through the GOT. */
# define SYSCALL_ERROR_HANDLER \
neg r0,r1; \
mov r12,r2; \
cfi_register (r12, r2); \
mov.l 0f,r12; \
mova 0f,r0; \
add r0,r12; \
mov.l 1f,r0; \
mov.l @(r0,r12),r0; \
mov r2,r12; \
cfi_restore (r12); \
mov.l r1,@r0; \
bra .Lpseudo_end; \
mov _IMM1,r0; \
.align 2; \
0: .long _GLOBAL_OFFSET_TABLE_; \
1: .long errno@GOT
# endif /* _LIBC_REENTRANT */
#endif /* PIC */
# ifdef NEED_SYSCALL_INST_PAD
# define SYSCALL_INST_PAD \
or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0
# else
# define SYSCALL_INST_PAD
# endif
#define SYSCALL_INST0 trapa #0x10
#define SYSCALL_INST1 trapa #0x11
#define SYSCALL_INST2 trapa #0x12
#define SYSCALL_INST3 trapa #0x13
#define SYSCALL_INST4 trapa #0x14
#define SYSCALL_INST5 mov.l @(0,r15),r0; trapa #0x15
#define SYSCALL_INST6 mov.l @(0,r15),r0; mov.l @(4,r15),r1; trapa #0x16
#undef DO_CALL
#define DO_CALL(syscall_name, args) \
mov.l 1f,r3; \
SYSCALL_INST##args; \
SYSCALL_INST_PAD; \
bra 2f; \
nop; \
.align 2; \
1: .long SYS_ify (syscall_name); \
2:
#else /* not __ASSEMBLER__ */
#define SYSCALL_INST_STR0 "trapa #0x10\n\t"
#define SYSCALL_INST_STR1 "trapa #0x11\n\t"
#define SYSCALL_INST_STR2 "trapa #0x12\n\t"
#define SYSCALL_INST_STR3 "trapa #0x13\n\t"
#define SYSCALL_INST_STR4 "trapa #0x14\n\t"
#define SYSCALL_INST_STR5 "trapa #0x15\n\t"
#define SYSCALL_INST_STR6 "trapa #0x16\n\t"
# ifdef NEED_SYSCALL_INST_PAD
# define SYSCALL_INST_PAD "\
or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
# else
# define SYSCALL_INST_PAD
# endif
#define ASMFMT_0
#define ASMFMT_1 \
, "r" (r4)
#define ASMFMT_2 \
, "r" (r4), "r" (r5)
#define ASMFMT_3 \
, "r" (r4), "r" (r5), "r" (r6)
#define ASMFMT_4 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7)
#define ASMFMT_5 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
#define ASMFMT_6 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
#define ASMFMT_7 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)
#define SUBSTITUTE_ARGS_0()
#define SUBSTITUTE_ARGS_1(arg1) \
long int _arg1 = (long int) (arg1); \
register long int r4 asm ("%r4") = (long int) (_arg1)
#define SUBSTITUTE_ARGS_2(arg1, arg2) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
register long int r4 asm ("%r4") = (long int) (_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2)
#define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
register long int r4 asm ("%r4") = (long int) (_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2); \
register long int r6 asm ("%r6") = (long int) (_arg3)
#define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
register long int r4 asm ("%r4") = (long int) (_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2); \
register long int r6 asm ("%r6") = (long int) (_arg3); \
register long int r7 asm ("%r7") = (long int) (_arg4)
#define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
register long int r4 asm ("%r4") = (long int) (_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2); \
register long int r6 asm ("%r6") = (long int) (_arg3); \
register long int r7 asm ("%r7") = (long int) (_arg4); \
register long int r0 asm ("%r0") = (long int) (_arg5)
#define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
long int _arg6 = (long int) (arg6); \
register long int r4 asm ("%r4") = (long int)(_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2); \
register long int r6 asm ("%r6") = (long int) (_arg3); \
register long int r7 asm ("%r7") = (long int) (_arg4); \
register long int r0 asm ("%r0") = (long int) (_arg5); \
register long int r1 asm ("%r1") = (long int) (_arg6)
#define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
long int _arg6 = (long int) (arg6); \
long int _arg7 = (long int) (arg7); \
register long int r4 asm ("%r4") = (long int) (_arg1); \
register long int r5 asm ("%r5") = (long int) (_arg2); \
register long int r6 asm ("%r6") = (long int) (_arg3); \
register long int r7 asm ("%r7") = (long int) (_arg4); \
register long int r0 asm ("%r0") = (long int) (_arg5); \
register long int r1 asm ("%r1") = (long int) (_arg6); \
register long int r2 asm ("%r2") = (long int) (_arg7)
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
({ \
unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (resultvar, ), 0)) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \
resultvar = 0xffffffff; \
} \
(int) resultvar; })
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ \
unsigned long int resultvar; \
register long int r3 asm ("%r3") = SYS_ify (name); \
SUBSTITUTE_ARGS_##nr(args); \
\
asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
: "=z" (resultvar) \
: "r" (r3) ASMFMT_##nr \
: "memory", "t"); \
\
(int) resultvar; })
/* The _NCS variant allows non-constant syscall numbers. */
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
({ \
unsigned long int resultvar; \
register long int r3 asm ("%r3") = (name); \
SUBSTITUTE_ARGS_##nr(args); \
\
asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
: "=z" (resultvar) \
: "r" (r3) ASMFMT_##nr \
: "memory", "t"); \
\
(int) resultvar; })
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
((unsigned int) (val) >= 0xfffff001u)
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#endif /* __ASSEMBLER__ */
/* Pointer mangling support. */
#if IS_IN (rtld)
/* We cannot use the thread descriptor because in ld.so we use setjmp
earlier than the descriptor is initialized. Using a global variable
is too complicated here since we have no PC-relative addressing mode. */
#else
# ifdef __ASSEMBLER__
# define PTR_MANGLE(reg, tmp) \
stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
# define PTR_MANGLE2(reg, tmp) xor tmp,reg
# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
# else
# define PTR_MANGLE(var) \
(var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#endif
#endif /* linux/sh/sysdep.h */
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