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https://sourceware.org/git/glibc.git
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161 lines
4.2 KiB
C
161 lines
4.2 KiB
C
/* Copyright (C) 1997, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, January 1997.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LINUX_SPARC32_SYSDEP_H
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#define _LINUX_SPARC32_SYSDEP_H 1
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#include <sysdeps/unix/sparc/sysdep.h>
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#ifdef IS_IN_rtld
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# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
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#endif
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#include <tls.h>
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#undef SYS_ify
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#define SYS_ify(syscall_name) __NR_##syscall_name
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#ifdef __ASSEMBLER__
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#define LOADSYSCALL(x) mov __NR_##x, %g1
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/* Linux/SPARC uses a different trap number */
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#undef PSEUDO
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#undef PSEUDO_NOERRNO
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#undef PSEUDO_ERRVAL
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#undef PSEUDO_END
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#undef ENTRY
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#undef END
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#undef LOC
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#define ENTRY(name) \
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.align 4; \
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.global C_SYMBOL_NAME(name); \
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.type name, @function; \
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C_LABEL(name) \
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cfi_startproc;
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#define END(name) \
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cfi_endproc; \
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.size name, . - name
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#define LOC(name) .L##name
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/* If the offset to __syscall_error fits into a signed 22-bit
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* immediate branch offset, the linker will relax the call into
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* a normal branch.
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*/
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#define PSEUDO(name, syscall_name, args) \
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.text; \
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.globl __syscall_error; \
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ENTRY(name); \
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LOADSYSCALL(syscall_name); \
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ta 0x10; \
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bcc 1f; \
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mov %o7, %g1; \
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call __syscall_error; \
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mov %g1, %o7; \
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1:
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#define PSEUDO_NOERRNO(name, syscall_name, args)\
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.text; \
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ENTRY(name); \
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LOADSYSCALL(syscall_name); \
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ta 0x10;
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#define PSEUDO_ERRVAL(name, syscall_name, args) \
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.text; \
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ENTRY(name); \
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LOADSYSCALL(syscall_name); \
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ta 0x10;
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#define PSEUDO_END(name) \
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END(name)
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#else /* __ASSEMBLER__ */
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#define __SYSCALL_STRING \
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"ta 0x10;" \
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"bcs 2f;" \
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" nop;" \
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"1:" \
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".subsection 2;" \
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"2:" \
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"save %%sp, -192, %%sp;" \
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"call __errno_location;" \
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" nop;" \
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"st %%i0,[%%o0];" \
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"ba 1b;" \
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" restore %%g0, -1, %%o0;" \
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".previous;"
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#define __CLONE_SYSCALL_STRING \
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"ta 0x10;" \
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"bcs 2f;" \
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" sub %%o1, 1, %%o1;" \
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"and %%o0, %%o1, %%o0;" \
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"1:" \
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".subsection 2;" \
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"2:" \
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"save %%sp, -192, %%sp;" \
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"call __errno_location;" \
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" nop;" \
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"st %%i0, [%%o0];" \
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"ba 1b;" \
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" restore %%g0, -1, %%o0;" \
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".previous;"
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#define __INTERNAL_SYSCALL_STRING \
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"ta 0x10;" \
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"bcs,a 1f;" \
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" sub %%g0, %%o0, %%o0;" \
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"1:"
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#define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6", \
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
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"cc", "memory"
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#include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
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#endif /* __ASSEMBLER__ */
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/* Pointer mangling support. */
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#if defined NOT_IN_libc && defined IS_IN_rtld
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/* We cannot use the thread descriptor because in ld.so we use setjmp
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earlier than the descriptor is initialized. */
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#else
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# ifdef __ASSEMBLER__
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# define PTR_MANGLE(dreg, reg, tmpreg) \
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ld [%g7 + POINTER_GUARD], tmpreg; \
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xor reg, tmpreg, dreg
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# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
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# define PTR_MANGLE2(dreg, reg, tmpreg) \
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xor reg, tmpreg, dreg
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# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
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# else
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# define PTR_MANGLE(var) \
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(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
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# define PTR_DEMANGLE(var) PTR_MANGLE (var)
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# endif
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#endif
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#endif /* linux/sparc/sysdep.h */
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