[PATCH 5/8] SPU add link, readlink and symlink

[Jeff Johnston]

Patch checked in.

-- Jeff J.

Patrick Mansfield wrote:
> Add the following functions, implmented via assist calls:
> 
> 	int link(const char *oldpath, const char *newpath)
> 	int readlink(const char *path, char *buf, int bufsiz)
> 	int symlink(const char *oldpath, const char *newpath)
> 
> libgloss ChangeLog:
> 
> 2007-06-18 Patrick Mansfield <patmans@us.ibm.com>
> 
> 	* spu/jsre.h: JSRE_LINK, JSRE_SYMLINK and JSRE_READLINK.
> 	* spu/link.c: Add link support via an assist call.
> 	* spu/readlink.c: Add readlink support via an assist call.
> 	* spu/symlink.c: Add symlink support via an assist call.
> 	* spu/Makefile.in: Add new files.
> 
> Index: quilt/libgloss/spu/Makefile.in
> ===================================================================
> --- quilt.orig/libgloss/spu/Makefile.in
> +++ quilt/libgloss/spu/Makefile.in
> @@ -58,8 +58,9 @@ OBJS = \
>  	access.o chdir.o chmod.o chown.o close.o conv_stat.o dup.o exit.o \
>  	fchdir.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 lstat.o mkdir.o mknod.o nanosleep.o open.o read.o rmdir.o \
> -	sbrk.o stat.o syscalls.o unlink.o write.o
> +	link.o lseek.o lstat.o mkdir.o mknod.o nanosleep.o open.o read.o \
> +	readlink.o rmdir.o sbrk.o stat.o symlink.o syscalls.o unlink.o \
> +	write.o
>  
>  # Object files specific to particular targets.
>  EVALOBJS = ${OBJS}
> Index: quilt/libgloss/spu/link.c
> ===================================================================
> --- /dev/null
> +++ quilt/libgloss/spu/link.c
> @@ -0,0 +1,53 @@
> +/*
> +  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 <unistd.h>
> +#include "jsre.h"
> +
> +typedef struct
> +{
> +  unsigned int oldpath;
> +  unsigned int pad0[3];
> +  unsigned int newpath;
> +  unsigned int pad1[3];
> +} syscall_link_t;
> +
> +int
> +link (const char *oldpath, const char *newpath)
> +{
> +  syscall_link_t sys;
> +
> +  sys.oldpath = (unsigned int) oldpath;
> +  sys.newpath = (unsigned int) newpath;
> +  return __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_LINK, &sys);
> +}
> Index: quilt/libgloss/spu/jsre.h
> ===================================================================
> --- quilt.orig/libgloss/spu/jsre.h
> +++ quilt/libgloss/spu/jsre.h
> @@ -67,6 +67,9 @@ Author: Andreas Neukoetter (ti95neuk@de.
>  #define JSRE_FCHOWN 41
>  #define JSRE_LCHOWN 42
>  #define JSRE_GETCWD 43
> +#define JSRE_LINK 44
> +#define JSRE_SYMLINK 45
> +#define JSRE_READLINK 46
>  
>  struct jsre_stat {
>      unsigned int dev;
> Index: quilt/libgloss/spu/symlink.c
> ===================================================================
> --- /dev/null
> +++ quilt/libgloss/spu/symlink.c
> @@ -0,0 +1,53 @@
> +/*
> +  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 <unistd.h>
> +#include "jsre.h"
> +
> +typedef struct
> +{
> +  unsigned int oldpath;
> +  unsigned int pad0[3];
> +  unsigned int newpath;
> +  unsigned int pad1[3];
> +} syscall_link_t;
> +
> +int
> +symlink (const char *oldpath, const char *newpath)
> +{
> +  syscall_link_t sys;
> +
> +  sys.oldpath = (unsigned int) oldpath;
> +  sys.newpath = (unsigned int) newpath;
> +  return __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_SYMLINK, &sys);
> +}
> Index: quilt/libgloss/spu/readlink.c
> ===================================================================
> --- /dev/null
> +++ quilt/libgloss/spu/readlink.c
> @@ -0,0 +1,62 @@
> +/*
> +  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 <unistd.h>
> +#include "jsre.h"
> +
> +typedef struct
> +{
> +  unsigned int path;
> +  unsigned int pad0[3];
> +  unsigned int buf;
> +  unsigned int pad1[3];
> +  unsigned int bufsiz;
> +  unsigned int pad2[3];
> +} syscall_readlink_t;
> +
> +/*
> + * POSIX says readlink returns ssize_t, and has an size_t bufsiz, but
> + * newlib has it prototyped as returning int, and int bufsiz. ssize_t,
> + * size_t and int are ally currently 4 bytes for SPU, so just leave them
> + * as ints for now.
> + */
> +int
> +readlink (const char *path, char *buf, int bufsiz)
> +{
> +  syscall_readlink_t sys;
> +
> +  sys.path = (unsigned int) path;
> +  sys.buf = (unsigned int) buf;
> +  sys.bufsiz = (unsigned int) bufsiz;
> +  return __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_READLINK, &sys);
> +}