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* mmap.cc (mmap64): Allow MAP_FIXED with pagesize granularity (4K).

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If a non-zero addr is given, align it to the next lower 64K boundary.
	(fhandler_disk_file::mmap): If a non-zero address is given, try
	mapping using the given address first.  If it fails and flags is not
	MAP_FIXED, try again with NULL address.
This commit is contained in:
Corinna Vinschen 2003-07-03 20:53:26 +00:00
parent 0a447ef392
commit 6556178009
2 changed files with 58 additions and 7 deletions
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41
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,44 @@
2003-07-03 Corinna Vinschen <corinna@vinschen.de>
* mmap.cc (mmap64): Allow MAP_FIXED with pagesize granularity (4K).
If a non-zero addr is given, align it to the next lower 64K boundary.
(fhandler_disk_file::mmap): If a non-zero address is given, try
mapping using the given address first. If it fails and flags is not
MAP_FIXED, try again with NULL address.
2003-07-01 Christopher Faylor <cgf@redhat.com>
* thread.cc: Remove _MT_SAFE conditional.
2003-07-01 Christopher Faylor <cgf@redhat.com>
* configure.in: Fix --enable-server option.
* configure: Regenerate.
2003-07-01 Christopher Faylor <cgf@redhat.com>
* Makefile.in: Remove cygserver stuff.
* acconfig.h: Add USE_CYGSERVER define.
* config.h.in: Regenerate.
* configure.in: Add --enable-server setting.
* configure: Regenerate.
* fhandler_tty.cc (fhandler_tty_slave::open): Conditionalize
compilation of cygserver stuff.
* fork.cc (fork_child): Ditto.
* shm.cc: Ditto.
* tty.cc (tty::common_init): Ditto.
* dcrt0.cc: Use bool rather than BOOL for CYGWIN environment variable
definitions.
* environ.cc: Ditto.
* ntea.cc: Ditto.
* security.cc: Ditto.
* security.h: Ditto.
* syscalls.cc (check_posix_perm): Remove externs that were already
declared in a header.
* winsup.h: Ditto. Declare _MT_SAFE here. Delete it someday since
cygwin should always be _MT_SAFE.
2003-07-01 Christopher Faylor <cgf@redhat.com> 2003-07-01 Christopher Faylor <cgf@redhat.com>
* thread.cc: Remove _MT_SAFE conditional. * thread.cc: Remove _MT_SAFE conditional.

24
winsup/cygwin/mmap.cc
View File

@ -438,7 +438,7 @@ mmap64 (caddr_t addr, size_t len, int prot, int flags, int fd, _off64_t off)
if (off % getpagesize () if (off % getpagesize ()
|| (!(flags & MAP_SHARED) && !(flags & MAP_PRIVATE)) || (!(flags & MAP_SHARED) && !(flags & MAP_PRIVATE))
|| ((flags & MAP_SHARED) && (flags & MAP_PRIVATE)) || ((flags & MAP_SHARED) && (flags & MAP_PRIVATE))
|| ((flags & MAP_FIXED) && ((DWORD)addr % granularity)) || ((flags & MAP_FIXED) && ((DWORD)addr % getpagesize ()))
|| !len) || !len)
{ {
set_errno (EINVAL); set_errno (EINVAL);
@ -469,8 +469,6 @@ mmap64 (caddr_t addr, size_t len, int prot, int flags, int fd, _off64_t off)
DWORD gran_len = howmany (off + len, granularity) * granularity - gran_off; DWORD gran_len = howmany (off + len, granularity) * granularity - gran_off;
fhandler_base *fh; fhandler_base *fh;
caddr_t base = addr;
HANDLE h;
if (fd != -1) if (fd != -1)
{ {
@ -540,7 +538,13 @@ mmap64 (caddr_t addr, size_t len, int prot, int flags, int fd, _off64_t off)
&& (wincap.has_working_copy_on_write () || fd != -1)) && (wincap.has_working_copy_on_write () || fd != -1))
access = FILE_MAP_COPY; access = FILE_MAP_COPY;
h = fh->mmap (&base, gran_len, access, flags, gran_off); caddr_t base = addr;
/* This shifts the base address to the next lower 64K boundary.
The offset is re-added when evaluating the return value. */
if (base)
base -= off - gran_off;
HANDLE h = fh->mmap (&base, gran_len, access, flags, gran_off);
if (h == INVALID_HANDLE_VALUE) if (h == INVALID_HANDLE_VALUE)
{ {
@ -813,9 +817,15 @@ fhandler_disk_file::mmap (caddr_t *addr, size_t len, DWORD access,
} }
DWORD high = off >> 32, low = off & 0xffffffff; DWORD high = off >> 32, low = off & 0xffffffff;
void *base = MapViewOfFileEx (h, access, high, low, len, void *base = NULL;
(flags & MAP_FIXED) ? *addr : NULL); /* If a non-zero address is given, try mapping using the given address first.
debug_printf ("%x = MapViewOfFileEx (h:%x, access:%x, 0, off:%D, len:%d, addr:%x)", base, h, access, off, len, (flags & MAP_FIXED) ? *addr : NULL); If it fails and flags is not MAP_FIXED, try again with NULL address. */
if (addr)
base = MapViewOfFileEx (h, access, high, low, len, *addr);
if (!base && !(flags & MAP_FIXED))
base = MapViewOfFileEx (h, access, high, low, len, NULL);
debug_printf ("%x = MapViewOfFileEx (h:%x, access:%x, 0, off:%D, "
"len:%d, addr:%x)", base, h, access, off, len, *addr);
if (!base || ((flags & MAP_FIXED) && base != *addr)) if (!base || ((flags & MAP_FIXED) && base != *addr))
{ {
if (!base) if (!base)