Commit: SEH: Add .seh_code function

Nicholas Clifton nickc@redhat.com
Tue Mar 25 18:13:00 GMT 2014


Hi Guys,

   I am applying the patch below to add a new pseudo-op to the structured
   exception handling suite of ops.  The new pseudo-op - .seh_code -
   changes the current section back to the code section of the current
   function.  This is helpful because the code section may not be .text.
   Compiler optimizations may have changed the section name to something
   else.

Cheers
   Nick

gas/ChangeLog
2014-03-25  Nick Clifton  <nickc@redhat.com>

	* config/obj-coff-seh.c (obj_coff_seh_code): New function -
	switches the current segment back to the code segment recorded
	when seh_proc was last invoked.
	* config/obj-coff-seh.h (SEH_CMDS): Add seh_code.

diff --git a/gas/config/obj-coff-seh.c b/gas/config/obj-coff-seh.c
index 88c4a87..ad3fc87 100644
--- a/gas/config/obj-coff-seh.c
+++ b/gas/config/obj-coff-seh.c
@@ -169,6 +169,13 @@ seh_validate_seg (const char *directive)
    return 0;
  }

+/* Switch back to the code section, whatever that may be.  */
+static void
+obj_coff_seh_code (int ignored ATTRIBUTE_UNUSED)
+{
+  subseg_set (seh_ctx_cur->code_seg, 0);
+}
+
  static void
  switch_xdata (int subseg, segT code_seg)
  {
diff --git a/gas/config/obj-coff-seh.h b/gas/config/obj-coff-seh.h
index cf4d216..cf49485 100644
--- a/gas/config/obj-coff-seh.h
+++ b/gas/config/obj-coff-seh.h
@@ -56,6 +56,7 @@
    .seh_savereg
    .seh_savexmm
    .seh_pushframe
+  .seh_code
  */

  /* architecture specific pdata/xdata handling.  */
@@ -73,6 +74,7 @@
  	{"seh_32", obj_coff_seh_32, 1}, \
  	{"seh_no32", obj_coff_seh_32, 0}, \
  	{"seh_handler", obj_coff_seh_handler, 0}, \
+	{"seh_code", obj_coff_seh_code, 0}, \
  	{"seh_handlerdata", obj_coff_seh_handlerdata, 0},

  /* Type definitions.  */
@@ -148,6 +150,7 @@ static void obj_coff_seh_32 (int);
  static void obj_coff_seh_proc  (int);
  static void obj_coff_seh_handler (int);
  static void obj_coff_seh_handlerdata (int);
+static void obj_coff_seh_code (int);

  #define UNDSEC bfd_und_section_ptr

@@ -201,4 +204,3 @@ static void obj_coff_seh_handlerdata (int);
     PEX64_SCOPE_ENTRY_SIZE * (IDX))

  #endif
-



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