ChangeLog:

[deliverable/binutils-gdb.git] / gdb / inf-child.c

diff --git a/gdb/inf-child.c b/gdb/inf-child.c
index 5531102314bcc15ff3caf22973eb63136828abbf..ae2dd1e10128165ed92e1ec2107da0dd455c491f 100644 (file)
--- a/gdb/inf-child.c
+++ b/gdb/inf-child.c
@@ -30,6 +30,7 @@
 #include "inf-child.h"
 #include "gdb/fileio.h"
 #include "agent.h"
+#include "gdb_wait.h"
 
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>         /* for MAXPATHLEN */
@@ -38,6 +39,29 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+/* Helper function for child_wait and the derivatives of child_wait.
+   HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
+   translation of that in OURSTATUS.  */
+void
+store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
+{
+  if (WIFEXITED (hoststatus))
+    {
+      ourstatus->kind = TARGET_WAITKIND_EXITED;
+      ourstatus->value.integer = WEXITSTATUS (hoststatus);
+    }
+  else if (!WIFSTOPPED (hoststatus))
+    {
+      ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+      ourstatus->value.sig = gdb_signal_from_host (WTERMSIG (hoststatus));
+    }
+  else
+    {
+      ourstatus->kind = TARGET_WAITKIND_STOPPED;
+      ourstatus->value.sig = gdb_signal_from_host (WSTOPSIG (hoststatus));
+    }
+}
+
 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
    for all registers.  */
 
@@ -241,10 +265,15 @@ inf_child_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
 #ifdef HAVE_PWRITE
   ret = pwrite (fd, write_buf, len, (long) offset);
 #else
-  ret = lseek (fd, (long) offset, SEEK_SET);
-  if (ret != -1)
-    ret = write (fd, write_buf, len);
+  ret = -1;
 #endif
+  /* If we have no pwrite or it failed for this file, use lseek/write.  */
+  if (ret == -1)
+    {
+      ret = lseek (fd, (long) offset, SEEK_SET);
+      if (ret != -1)
+       ret = write (fd, write_buf, len);
+    }
 
   if (ret == -1)
     *target_errno = inf_child_errno_to_fileio_error (errno);
@@ -264,10 +293,15 @@ inf_child_fileio_pread (int fd, gdb_byte *read_buf, int len,
 #ifdef HAVE_PREAD
   ret = pread (fd, read_buf, len, (long) offset);
 #else
-  ret = lseek (fd, (long) offset, SEEK_SET);
-  if (ret != -1)
-    ret = read (fd, read_buf, len);
+  ret = -1;
 #endif
+  /* If we have no pread or it failed for this file, use lseek/read.  */
+  if (ret == -1)
+    {
+      ret = lseek (fd, (long) offset, SEEK_SET);
+      if (ret != -1)
+       ret = read (fd, read_buf, len);
+    }
 
   if (ret == -1)
     *target_errno = inf_child_errno_to_fileio_error (errno);