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[PATCH 3/8] SPU add getcwd support mainly via an assist call
Add spu getcwd support, mainly via an assist call.
libgloss ChangeLog:
2007-06-18 Patrick Mansfield <patmans@us.ibm.com>
* spu/jsre.h: Add JSRE_GETCWD.
* spu/getcwd.c: New file, implement getcwd with help from an
assist call.
* spu/Makefile.in: Add getcwd.
Index: quilt/libgloss/spu/Makefile.in
===================================================================
--- quilt.orig/libgloss/spu/Makefile.in
+++ quilt/libgloss/spu/Makefile.in
@@ -56,7 +56,7 @@ OBJCOPY = `t='$(program_transform_name)'
# object files needed
OBJS = \
access.o chdir.o chmod.o chown.o close.o dup.o exit.o fchdir.o \
- fchmod.o fchown.o fstat.o ftruncate.o getpagesize.o getpid.o \
+ fchmod.o fchown.o fstat.o ftruncate.o getcwd.o getpagesize.o getpid.o \
gettimeofday.o isatty.o kill.o lchown.o lseek.o mkdir.o \
mknod.o nanosleep.o open.o read.o rmdir.o sbrk.o stat.o syscalls.o \
unlink.o write.o
Index: quilt/libgloss/spu/getcwd.c
===================================================================
--- /dev/null
+++ quilt/libgloss/spu/getcwd.c
@@ -0,0 +1,109 @@
+/*
+ Copyright 2007
+ International Business Machines Corporation,
+ Sony Computer Entertainment, Incorporated,
+ Toshiba Corporation,
+
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * 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.
+ * Neither the names of the copyright holders nor the names of their
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 OWNER
+ 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 <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include "jsre.h"
+
+#define ALLOC_BASE 64
+#define ALLOC_INCR 64
+
+typedef struct
+{
+ unsigned int buf;
+ unsigned int pad0[3];
+ unsigned int size;
+ unsigned int pad1[3];
+} syscall_getcwd_t;
+
+char *
+getcwd (char *buf, size_t size)
+{
+ syscall_getcwd_t sys;
+ int retry_alloc, local_alloc;
+ char *newbuf;
+ char *res;
+
+ /*
+ * Do not let the ppu side allocate memory, since it has to be used on
+ * the SPU (must be in LS), and it can't easily be freed on the spu
+ * side. So check for NULL buf, handle allocations here, and only call
+ * the assist call with a non-NULL buf.
+ */
+ retry_alloc = 0;
+ local_alloc = 0;
+ if (!buf) {
+ local_alloc = 1;
+ if (size == 0) {
+ retry_alloc = 1;
+ size = ALLOC_BASE;
+ }
+ buf = malloc (size);
+ if (!buf) {
+ /*
+ * Leave errno as set by malloc.
+ */
+ return NULL;
+ }
+ }
+
+ /*
+ * Let the assist call check for error cases, specifically let it handle
+ * non-NULL buf and size of zero.
+ */
+
+ sys.buf = (unsigned int) buf;
+ sys.size = (unsigned int) size;
+ res = (char*) __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_GETCWD, &sys);
+
+ while (!res && retry_alloc && errno == ERANGE) {
+ size += ALLOC_INCR;
+ newbuf = realloc (buf, size);
+ if (!newbuf) {
+ free (buf);
+ return NULL;
+ }
+ buf = newbuf;
+
+ sys.buf = (unsigned int) buf;
+ sys.size = (unsigned int) size;
+ res = (char*) __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_GETCWD, &sys);
+ }
+
+ if (!res && local_alloc) {
+ free (buf);
+ }
+
+ return res;
+}
Index: quilt/libgloss/spu/jsre.h
===================================================================
--- quilt.orig/libgloss/spu/jsre.h
+++ quilt/libgloss/spu/jsre.h
@@ -62,6 +62,7 @@ Author: Andreas Neukoetter (ti95neuk@de.
#define JSRE_CHOWN 40
#define JSRE_FCHOWN 41
#define JSRE_LCHOWN 42
+#define JSRE_GETCWD 43
typedef struct {
unsigned int dev;