* gdbthread.h (struct thread_info): Add comments around

[deliverable/binutils-gdb.git] / gdb / ppc-linux-tdep.c

diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index ccf40855c7f7c11118167e0da9c981533ec6d845..28048573f343250e2a917865ee8f3ebb13cf0dd0 100644 (file)
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -491,7 +491,7 @@ ppc64_standard_linkage1_target (struct frame_info *frame,
   return ppc64_desc_entry_point (desc);
 }
 
-static struct core_regset_section ppc_linux_regset_sections[] =
+static struct core_regset_section ppc_linux_vsx_regset_sections[] =
 {
   { ".reg", 268 },
   { ".reg2", 264 },
@@ -500,6 +500,21 @@ static struct core_regset_section ppc_linux_regset_sections[] =
   { NULL, 0}
 };
 
+static struct core_regset_section ppc_linux_vmx_regset_sections[] =
+{
+  { ".reg", 268 },
+  { ".reg2", 264 },
+  { ".reg-ppc-vmx", 544 },
+  { NULL, 0}
+};
+
+static struct core_regset_section ppc_linux_fp_regset_sections[] =
+{
+  { ".reg", 268 },
+  { ".reg2", 264 },
+  { NULL, 0}
+};
+
 static CORE_ADDR
 ppc64_standard_linkage2_target (struct frame_info *frame,
                                CORE_ADDR pc, unsigned int *insn)
@@ -604,7 +619,36 @@ ppc64_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
 
   /* Check if ADDR points to a function descriptor.  */
   if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
-    return get_target_memory_unsigned (targ, addr, 8);
+    {
+      /* There may be relocations that need to be applied to the .opd 
+        section.  Unfortunately, this function may be called at a time
+        where these relocations have not yet been performed -- this can
+        happen for example shortly after a library has been loaded with
+        dlopen, but ld.so has not yet applied the relocations.
+
+        To cope with both the case where the relocation has been applied,
+        and the case where it has not yet been applied, we do *not* read
+        the (maybe) relocated value from target memory, but we instead
+        read the non-relocated value from the BFD, and apply the relocation
+        offset manually.
+
+        This makes the assumption that all .opd entries are always relocated
+        by the same offset the section itself was relocated.  This should
+        always be the case for GNU/Linux executables and shared libraries.
+        Note that other kind of object files (e.g. those added via
+        add-symbol-files) will currently never end up here anyway, as this
+        function accesses *target* sections only; only the main exec and
+        shared libraries are ever added to the target.  */
+
+      gdb_byte buf[8];
+      int res;
+
+      res = bfd_get_section_contents (s->bfd, s->the_bfd_section,
+                                     &buf, addr - s->addr, 8);
+      if (res != 0)
+       return extract_unsigned_integer (buf, 8)
+               - bfd_section_vma (s->bfd, s->the_bfd_section) + s->addr;
+   }
 
   return addr;
 }
@@ -1074,7 +1118,14 @@ ppc_linux_init_abi (struct gdbarch_info info,
   set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description);
 
   /* Supported register sections.  */
-  set_gdbarch_core_regset_sections (gdbarch, ppc_linux_regset_sections);
+  if (tdesc_find_feature (info.target_desc,
+                         "org.gnu.gdb.power.vsx"))
+    set_gdbarch_core_regset_sections (gdbarch, ppc_linux_vsx_regset_sections);
+  else if (tdesc_find_feature (info.target_desc,
+                              "org.gnu.gdb.power.altivec"))
+    set_gdbarch_core_regset_sections (gdbarch, ppc_linux_vmx_regset_sections);
+  else
+    set_gdbarch_core_regset_sections (gdbarch, ppc_linux_fp_regset_sections);
 
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,