Respond to qOffsets gdb packet (for debugging bFLT binaries).

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1986 c046a42c-6fe2-441c-8c8c-71466251a162

gdbstub.c

@@ -17,6 +17,7 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#include "config.h"
 #ifdef CONFIG_USER_ONLY
 #include <stdlib.h>
 #include <stdio.h>
@@ -24,6 +25,7 @@
 #include <string.h>
 #include <errno.h>
 #include <unistd.h>
+#include <fcntl.h>
 
 #include "qemu.h"
 #else
@@ -680,6 +682,18 @@ static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
             goto breakpoint_error;
         }
         break;
+#ifdef CONFIG_USER_ONLY
+    case 'q':
+        if (strncmp(p, "Offsets", 7) == 0) {
+            TaskState *ts = env->opaque;
+
+            sprintf(buf, "Text=%x;Data=%x;Bss=%x", ts->info->code_offset,
+                ts->info->data_offset, ts->info->data_offset);
+            put_packet(s, buf);
+            break;
+        }
+        /* Fall through.  */
+#endif
     default:
         //        unknown_command:
         /* put empty packet */

linux-user/flatload.c

@@ -783,6 +783,9 @@ int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
     info->start_brk = libinfo[0].start_brk;
     info->start_stack = sp;
     info->entry = start_addr;
+    info->code_offset = info->start_code;
+    info->data_offset = info->start_data - libinfo[0].text_len;
+
     DBG_FLT("start_thread(entry=0x%x, start_stack=0x%x)\n",
             (int)info->entry, (int)info->start_stack);
     

linux-user/main.c

@@ -1541,6 +1541,7 @@ int main(int argc, char **argv)
     memset(ts, 0, sizeof(TaskState));
     env->opaque = ts;
     ts->used = 1;
+    ts->info = info;
     env->user_mode_only = 1;
     
 #if defined(TARGET_I386)

linux-user/qemu.h

@@ -27,6 +27,8 @@ struct image_info {
 	unsigned long	rss;
 	unsigned long	start_stack;
 	unsigned long	entry;
+        target_ulong    code_offset;
+        target_ulong    data_offset;
 	int		personality;
 };
 
@@ -73,6 +75,7 @@ typedef struct TaskState {
     uint32_t v86mask;
 #endif
     int used; /* non zero if used */
+    struct image_info *info;
     uint8_t stack[0];
 } __attribute__((aligned(16))) TaskState;