diff options
Diffstat (limited to 'src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorFreeBSD.c')
-rw-r--r-- | src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorFreeBSD.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorFreeBSD.c b/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorFreeBSD.c new file mode 100644 index 0000000000..3b93a4df76 --- /dev/null +++ b/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorFreeBSD.c @@ -0,0 +1,89 @@ +/* + * Stack-less Just-In-Time compiler + * + * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, this list + * of conditions and the following disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/mman.h> +#include <sys/procctl.h> + +#ifdef PROC_WXMAP_CTL +static SLJIT_INLINE int sljit_is_wx_block(void) +{ + static int wx_block = -1; + if (wx_block < 0) { + int sljit_wx_enable = PROC_WX_MAPPINGS_PERMIT; + wx_block = !!procctl(P_PID, 0, PROC_WXMAP_CTL, &sljit_wx_enable); + } + return wx_block; +} + +#define SLJIT_IS_WX_BLOCK sljit_is_wx_block() +#else /* !PROC_WXMAP_CTL */ +#define SLJIT_IS_WX_BLOCK (1) +#endif /* PROC_WXMAP_CTL */ + +static SLJIT_INLINE void* alloc_chunk(sljit_uw size) +{ + void *retval; + int prot = PROT_READ | PROT_WRITE | PROT_EXEC; + int flags = MAP_PRIVATE; + int fd = -1; + +#ifdef PROT_MAX + prot |= PROT_MAX(prot); +#endif + +#ifdef MAP_ANON + flags |= MAP_ANON; +#else /* !MAP_ANON */ + if (SLJIT_UNLIKELY((dev_zero < 0) && open_dev_zero())) + return NULL; + + fd = dev_zero; +#endif /* MAP_ANON */ + +retry: + retval = mmap(NULL, size, prot, flags, fd, 0); + if (retval == MAP_FAILED) { + if (!SLJIT_IS_WX_BLOCK) + goto retry; + + return NULL; + } + + /* HardenedBSD's mmap lies, so check permissions again. */ + if (mprotect(retval, size, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) { + munmap(retval, size); + return NULL; + } + + return retval; +} + +static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size) +{ + munmap(chunk, size); +} + +#include "sljitExecAllocatorCore.c" |