3f3bd10104
handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
126 lines
3 KiB
C++
126 lines
3 KiB
C++
/* fcntl.cc: fcntl syscall
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2008, 2009,
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2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <unistd.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "cygtls.h"
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extern "C" int
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fcntl64 (int fd, int cmd, ...)
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{
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int res = -1;
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intptr_t arg = 0;
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va_list args;
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pthread_testcancel ();
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__try
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{
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debug_printf ("fcntl(%d, %d, ...)", fd, cmd);
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cygheap_fdget cfd (fd, true);
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if (cfd < 0)
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__leave;
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/* FIXME? All numerical args to fcntl are defined as long on Linux.
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This relies on a really dirty trick on x86_64: A 32 bit mov to
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a register (e.g. mov $1, %edx) always sets the high 32 bit to 0.
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We're following the Linux lead here since the third arg to any
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function is in a register anyway (%r8 in MS ABI). That's the easy
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case which is covered here by always reading the arg with
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sizeof (intptr_t) == sizeof (long) == sizeof (void*) which matches
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all targets.
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However, the POSIX standard defines all numerical args as type int.
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If we take that literally, we had a (small) problem on 64 bit, since
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sizeof (void*) != sizeof (int). If we would like to follow POSIX more
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closely than Linux, we'd have to call va_arg on a per cmd basis. */
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va_start (args, cmd);
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arg = va_arg (args, intptr_t);
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va_end (args);
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switch (cmd)
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{
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case F_DUPFD:
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case F_DUPFD_CLOEXEC:
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if (arg >= 0 && arg < OPEN_MAX_MAX)
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{
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int flags = cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0;
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res = cygheap->fdtab.dup3 (fd, cygheap_fdnew ((arg) - 1), flags);
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}
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else
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{
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set_errno (EINVAL);
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res = -1;
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}
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break;
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default:
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res = cfd->fcntl (cmd, arg);
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break;
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}
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}
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__except (EFAULT) {}
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__endtry
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syscall_printf ("%R = fcntl(%d, %d, %ly)", res, fd, cmd, arg);
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return res;
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}
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#ifdef __x86_64__
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EXPORT_ALIAS (fcntl64, fcntl)
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EXPORT_ALIAS (fcntl64, _fcntl)
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#else
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extern "C" int
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_fcntl (int fd, int cmd, ...)
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{
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intptr_t arg = 0;
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va_list args;
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struct __flock32 *src = NULL;
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struct flock dst;
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__try
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{
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va_start (args, cmd);
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arg = va_arg (args, intptr_t);
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va_end (args);
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if (cmd == F_GETLK || cmd == F_SETLK || cmd == F_SETLKW)
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{
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src = (struct __flock32 *) arg;
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dst.l_type = src->l_type;
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dst.l_whence = src->l_whence;
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dst.l_start = src->l_start;
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dst.l_len = src->l_len;
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dst.l_pid = src->l_pid;
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arg = (intptr_t) &dst;
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}
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int res = fcntl64 (fd, cmd, arg);
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if (cmd == F_GETLK)
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{
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src->l_type = dst.l_type;
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src->l_whence = dst.l_whence;
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src->l_start = dst.l_start;
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src->l_len = dst.l_len;
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src->l_pid = (short) dst.l_pid;
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}
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return res;
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}
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__except (EFAULT)
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__endtry
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return -1;
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}
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#endif
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