1 files changed, 101 insertions, 1 deletions

diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 5edc473..a88f4d1 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -40,6 +40,12 @@
 #include <pwd.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <sys/stat.h>
+#include <sys/vfs.h>
+
+#ifndef SPUFS_MAGIC
+#define SPUFS_MAGIC 0x23c9b64e
+#endif
 
 #ifndef PTRACE_GETSIGINFO
 # define PTRACE_GETSIGINFO 0x4202
@@ -3034,6 +3040,100 @@ linux_supports_multi_process (void)
   return 1;
 }
 
+
+/* Enumerate spufs IDs for process PID.  */
+static int
+spu_enumerate_spu_ids (long pid, unsigned char *buf, CORE_ADDR offset, int len)
+{
+  int pos = 0;
+  int written = 0;
+  char path[128];
+  DIR *dir;
+  struct dirent *entry;
+
+  sprintf (path, "/proc/%ld/fd", pid);
+  dir = opendir (path);
+  if (!dir)
+    return -1;
+
+  rewinddir (dir);
+  while ((entry = readdir (dir)) != NULL)
+    {
+      struct stat st;
+      struct statfs stfs;
+      int fd;
+
+      fd = atoi (entry->d_name);
+      if (!fd)
+        continue;
+
+      sprintf (path, "/proc/%ld/fd/%d", pid, fd);
+      if (stat (path, &st) != 0)
+        continue;
+      if (!S_ISDIR (st.st_mode))
+        continue;
+
+      if (statfs (path, &stfs) != 0)
+        continue;
+      if (stfs.f_type != SPUFS_MAGIC)
+        continue;
+
+      if (pos >= offset && pos + 4 <= offset + len)
+        {
+          *(unsigned int *)(buf + pos - offset) = fd;
+          written += 4;
+        }
+      pos += 4;
+    }
+
+  closedir (dir);
+  return written;
+}
+
+/* Implements the to_xfer_partial interface for the TARGET_OBJECT_SPU
+   object type, using the /proc file system.  */
+static int
+linux_qxfer_spu (const char *annex, unsigned char *readbuf,
+		 unsigned const char *writebuf,
+		 CORE_ADDR offset, int len)
+{
+  long pid = lwpid_of (get_thread_lwp (current_inferior));
+  char buf[128];
+  int fd = 0;
+  int ret = 0;
+
+  if (!writebuf && !readbuf)
+    return -1;
+
+  if (!*annex)
+    {
+      if (!readbuf)
+	return -1;
+      else
+	return spu_enumerate_spu_ids (pid, readbuf, offset, len);
+    }
+
+  sprintf (buf, "/proc/%ld/fd/%s", pid, annex);
+  fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
+  if (fd <= 0)
+    return -1;
+
+  if (offset != 0
+      && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
+    {
+      close (fd);
+      return 0;
+    }
+
+  if (writebuf)
+    ret = write (fd, writebuf, (size_t) len);
+  else
+    ret = read (fd, readbuf, (size_t) len);
+
+  close (fd);
+  return ret;
+}
+
 static struct target_ops linux_target_ops = {
   linux_create_inferior,
   linux_attach,
@@ -3064,7 +3164,7 @@ static struct target_ops linux_target_ops = {
 #else
   NULL,
 #endif
-  NULL,
+  linux_qxfer_spu,
   hostio_last_error_from_errno,
   linux_qxfer_osdata,
   linux_xfer_siginfo,