Rebase patch #7

[deliverable/binutils-gdb.git] / gdb / xtensa-linux-nat.c

diff --git a/gdb/xtensa-linux-nat.c b/gdb/xtensa-linux-nat.c
index 77ad3e022155909642a1795ef06223debe712f21..5538d5b0c580ff94f8e34174de12edd6683daf0b 100644 (file)
--- a/gdb/xtensa-linux-nat.c
+++ b/gdb/xtensa-linux-nat.c
@@ -37,6 +37,9 @@
 #include "gregset.h"
 #include "xtensa-tdep.h"
 
+/* Defines ps_err_e, struct ps_prochandle.  */
+#include "gdb_proc_service.h"
+
 /* Extended register set depends on hardware configs.
    Keeping these definitions separately allows to introduce
    hardware-specific overlays.  */
@@ -280,6 +283,25 @@ xtensa_linux_store_inferior_registers (struct target_ops *ops,
     store_xtregs (regcache, regnum);
 }
 
+/* Called by libthread_db.  */
+
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+                    lwpid_t lwpid, int idx, void **base)
+{
+  xtensa_elf_gregset_t regs;
+
+  if (ptrace (PTRACE_GETREGS, lwpid, NULL, &regs) != 0)
+    return PS_ERR;
+
+  /* IDX is the bias from the thread pointer to the beginning of the
+     thread descriptor.  It has to be subtracted due to implementation
+     quirks in libthread_db.  */
+  *base = (void *) ((char *) regs.threadptr - idx);
+
+  return PS_OK;
+}
+
 void _initialize_xtensa_linux_nat (void);
 
 void