[patch, libffi] add os/2 support
Anthony Green
green@redhat.com
Fri Aug 6 12:36:00 GMT 2010
I'm checking in the following libffi patch.
This patch from Dan Witte and Walter Meinl adds OS/2 support to libffi.
Thanks,
AG
2010-04-12 Dan Witte <dwitte@mozilla.com>
Walter Meinl <wuno@lsvw.de>
* configure.ac: Add OS/2 support.
* configure: Rebuilt.
* src/closures.c: Ditto.
* src/dlmalloc.c: Ditto.
* src/x86/win32.S: Ditto.
Index: libffi/configure.ac
===================================================================
--- libffi.orig/configure.ac
+++ libffi/configure.ac
@@ -84,7 +84,7 @@ case "$host" in
i?86-*-freebsd* | i?86-*-openbsd*)
TARGET=X86_FREEBSD; TARGETDIR=x86
;;
- i?86-win32* | i?86-*-cygwin* | i?86-*-mingw*)
+ i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
TARGET=X86_WIN32; TARGETDIR=x86
# All mingw/cygwin/win32 builds require this for sharedlib
AM_LTLDFLAGS="-no-undefined"
Index: libffi/src/closures.c
===================================================================
--- libffi.orig/src/closures.c
+++ libffi/src/closures.c
@@ -44,7 +44,7 @@
# define FFI_MMAP_EXEC_WRIT 1
# define HAVE_MNTENT 1
# endif
-# if defined(X86_WIN32) || defined(X86_WIN64)
+# if defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)
/* Windows systems may have Data Execution Protection (DEP) enabled,
which requires the use of VirtualMalloc/VirtualFree to alloc/free
executable memory. */
@@ -193,11 +193,11 @@ static int dlmalloc_trim(size_t) MAYBE_U
static size_t dlmalloc_usable_size(void*) MAYBE_UNUSED;
static void dlmalloc_stats(void) MAYBE_UNUSED;
-#if !(defined(X86_WIN32) || defined(X86_WIN64)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
/* Use these for mmap and munmap within dlmalloc.c. */
static void *dlmmap(void *, size_t, int, int, int, off_t);
static int dlmunmap(void *, size_t);
-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
#define mmap dlmmap
#define munmap dlmunmap
@@ -207,7 +207,7 @@ static int dlmunmap(void *, size_t);
#undef mmap
#undef munmap
-#if !(defined(X86_WIN32) || defined(X86_WIN64)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
/* A mutex used to synchronize access to *exec* variables in this file. */
static pthread_mutex_t open_temp_exec_file_mutex = PTHREAD_MUTEX_INITIALIZER;
@@ -522,7 +522,7 @@ segment_holding_code (mstate m, char* ad
}
#endif
-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
/* Allocate a chunk of memory with the given size. Returns a pointer
to the writable address, and sets *CODE to the executable
Index: libffi/src/dlmalloc.c
===================================================================
--- libffi.orig/src/dlmalloc.c
+++ libffi/src/dlmalloc.c
@@ -459,6 +459,14 @@ DEFAULT_MMAP_THRESHOLD default: 25
#define MMAP_CLEARS 0 /* WINCE and some others apparently don't clear */
#endif /* WIN32 */
+#ifdef __OS2__
+#define INCL_DOS
+#include <os2.h>
+#define HAVE_MMAP 1
+#define HAVE_MORECORE 0
+#define LACKS_SYS_MMAN_H
+#endif /* __OS2__ */
+
#if defined(DARWIN) || defined(_DARWIN)
/* Mac OSX docs advise not to use sbrk; it seems better to use mmap */
#ifndef HAVE_MORECORE
@@ -1288,7 +1296,7 @@ extern void* sbrk(ptrdiff_t);
#define IS_MMAPPED_BIT (SIZE_T_ONE)
#define USE_MMAP_BIT (SIZE_T_ONE)
-#ifndef WIN32
+#if !defined(WIN32) && !defined (__OS2__)
#define CALL_MUNMAP(a, s) munmap((a), (s))
#define MMAP_PROT (PROT_READ|PROT_WRITE)
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
@@ -1311,6 +1319,42 @@ static int dev_zero_fd = -1; /* Cached f
#endif /* MAP_ANONYMOUS */
#define DIRECT_MMAP(s) CALL_MMAP(s)
+
+#elif defined(__OS2__)
+
+/* OS/2 MMAP via DosAllocMem */
+static void* os2mmap(size_t size) {
+ void* ptr;
+ if (DosAllocMem(&ptr, size, OBJ_ANY|PAG_COMMIT|PAG_READ|PAG_WRITE) &&
+ DosAllocMem(&ptr, size, PAG_COMMIT|PAG_READ|PAG_WRITE))
+ return MFAIL;
+ return ptr;
+}
+
+#define os2direct_mmap(n) os2mmap(n)
+
+/* This function supports releasing coalesed segments */
+static int os2munmap(void* ptr, size_t size) {
+ while (size) {
+ ULONG ulSize = size;
+ ULONG ulFlags = 0;
+ if (DosQueryMem(ptr, &ulSize, &ulFlags) != 0)
+ return -1;
+ if ((ulFlags & PAG_BASE) == 0 ||(ulFlags & PAG_COMMIT) == 0 ||
+ ulSize > size)
+ return -1;
+ if (DosFreeMem(ptr) != 0)
+ return -1;
+ ptr = ( void * ) ( ( char * ) ptr + ulSize );
+ size -= ulSize;
+ }
+ return 0;
+}
+
+#define CALL_MMAP(s) os2mmap(s)
+#define CALL_MUNMAP(a, s) os2munmap((a), (s))
+#define DIRECT_MMAP(s) os2direct_mmap(s)
+
#else /* WIN32 */
/* Win32 MMAP via VirtualAlloc */
@@ -1387,7 +1431,7 @@ static int win32munmap(void* ptr, size_t
unique mparams values are initialized only once.
*/
-#ifndef WIN32
+#if !defined(WIN32) && !defined(__OS2__)
/* By default use posix locks */
#include <pthread.h>
#define MLOCK_T pthread_mutex_t
@@ -1401,6 +1445,16 @@ static MLOCK_T morecore_mutex = PTHREAD_
static MLOCK_T magic_init_mutex = PTHREAD_MUTEX_INITIALIZER;
+#elif defined(__OS2__)
+#define MLOCK_T HMTX
+#define INITIAL_LOCK(l) DosCreateMutexSem(0, l, 0, FALSE)
+#define ACQUIRE_LOCK(l) DosRequestMutexSem(*l, SEM_INDEFINITE_WAIT)
+#define RELEASE_LOCK(l) DosReleaseMutexSem(*l)
+#if HAVE_MORECORE
+static MLOCK_T morecore_mutex;
+#endif /* HAVE_MORECORE */
+static MLOCK_T magic_init_mutex;
+
#else /* WIN32 */
/*
Because lock-protected regions have bounded times, and there
@@ -2492,10 +2546,15 @@ static int init_mparams(void) {
}
RELEASE_MAGIC_INIT_LOCK();
-#ifndef WIN32
+#if !defined(WIN32) && !defined(__OS2__)
mparams.page_size = malloc_getpagesize;
mparams.granularity = ((DEFAULT_GRANULARITY != 0)?
DEFAULT_GRANULARITY : mparams.page_size);
+#elif defined (__OS2__)
+ /* if low-memory is used, os2munmap() would break
+ if it were anything other than 64k */
+ mparams.page_size = 4096u;
+ mparams.granularity = 65536u;
#else /* WIN32 */
{
SYSTEM_INFO system_info;
Index: libffi/src/x86/win32.S
===================================================================
--- libffi.orig/src/x86/win32.S
+++ libffi/src/x86/win32.S
@@ -395,7 +395,9 @@ END
# This assumes we are using gas.
.balign 16
.globl _ffi_call_win32
+#ifndef __OS2__
.def _ffi_call_win32; .scl 2; .type 32; .endef
+#endif
_ffi_call_win32:
.LFB1:
pushl %ebp
@@ -547,7 +549,9 @@ _ffi_call_win32:
# This assumes we are using gas.
.balign 16
.globl _ffi_closure_SYSV
+#ifndef __OS2__
.def _ffi_closure_SYSV; .scl 2; .type 32; .endef
+#endif
_ffi_closure_SYSV:
.LFB3:
pushl %ebp
@@ -668,7 +672,9 @@ _ffi_closure_SYSV:
# This assumes we are using gas.
.balign 16
.globl _ffi_closure_raw_SYSV
+#ifndef __OS2__
.def _ffi_closure_raw_SYSV; .scl 2; .type 32; .endef
+#endif
_ffi_closure_raw_SYSV:
.LFB4:
pushl %ebp
@@ -784,7 +790,9 @@ _ffi_closure_raw_SYSV:
# This assumes we are using gas.
.balign 16
.globl _ffi_closure_STDCALL
+#ifndef __OS2__
.def _ffi_closure_STDCALL; .scl 2; .type 32; .endef
+#endif
_ffi_closure_STDCALL:
.LFB5:
pushl %ebp
@@ -890,7 +898,9 @@ _ffi_closure_STDCALL:
.ffi_closure_STDCALL_end:
.LFE5:
+#ifndef __OS2__
.section .eh_frame,"w"
+#endif
.Lframe1:
.LSCIE1:
.long .LECIE1-.LASCIE1 /* Length of Common Information Entry */
Index: libffi/README
===================================================================
--- libffi.orig/README
+++ libffi/README
@@ -75,6 +75,7 @@ tested:
| X86 | Linux |
| X86 | Mac OSX |
| X86 | OpenBSD |
+| X86 | OS/2 |
| X86 | Solaris |
| X86 | Windows/Cygwin |
| X86 | Windows/MingW |
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