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MIPS TLS debugging
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 3 Jul 2007 18:16:14 +0000 (UTC)
- Subject: MIPS TLS debugging
This patch adds a definition of TARGET_ASM_OUTPUT_DWARF_DTPREL on MIPS,
using recently added assembler directives, so that GDB can locate TLS
variables. Because the assembler directives have only just been added,
there's an associated configure test for them.
Tested with no regressions with cross to mips-linux-gnu. OK to commit?
2007-07-03 Joseph Myers <joseph@codesourcery.com>
* configure.ac: Test for .dtprelword support on MIPS.
* configure, config.in: Regenerate.
* config/mips/mips.c (mips_output_dwarf_dtprel): New.
(TARGET_ASM_OUTPUT_DWARF_DTPREL): Define.
Index: gcc/configure.ac
===================================================================
--- gcc/configure.ac (revision 126232)
+++ gcc/configure.ac (working copy)
@@ -2953,6 +2953,16 @@
[.gnu_attribute 4,1],,
[AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
[Define if your assembler supports .gnu_attribute.])])
+
+ gcc_GAS_CHECK_FEATURE([.dtprelword support],
+ gcc_cv_as_mips_dtprelword, [2,18,0],,
+ [.section .tdata,"awT",@progbits
+x:
+ .word 2
+ .text
+ .dtprelword x+0x8000],,
+ [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
+ [Define if your assembler supports .dtprelword.])])
;;
esac
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c (revision 126232)
+++ gcc/config/mips/mips.c (working copy)
@@ -428,6 +428,7 @@
static int mips_comp_type_attributes (tree, tree);
static int mips_mode_rep_extended (enum machine_mode, enum machine_mode);
static bool mips_offset_within_alignment_p (rtx, HOST_WIDE_INT);
+static void mips_output_dwarf_dtprel (FILE *, int, rtx) ATTRIBUTE_UNUSED;
/* Structure to be filled in by compute_frame_size with register
save masks, and offsets for the current function. */
@@ -1296,6 +1297,11 @@
#undef TARGET_COMP_TYPE_ATTRIBUTES
#define TARGET_COMP_TYPE_ATTRIBUTES mips_comp_type_attributes
+#ifdef HAVE_AS_DTPRELWORD
+#undef TARGET_ASM_OUTPUT_DWARF_DTPREL
+#define TARGET_ASM_OUTPUT_DWARF_DTPREL mips_output_dwarf_dtprel
+#endif
+
struct gcc_target targetm = TARGET_INITIALIZER;
@@ -11782,4 +11788,26 @@
return UNKNOWN;
}
+/* MIPS implementation of TARGET_ASM_OUTPUT_DWARF_DTPREL. */
+
+static void
+mips_output_dwarf_dtprel (FILE *file, int size, rtx x)
+{
+ switch (size)
+ {
+ case 4:
+ fputs ("\t.dtprelword\t", file);
+ break;
+
+ case 8:
+ fputs ("\t.dtpreldword\t", file);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ output_addr_const (file, x);
+ fputs ("+0x8000", file);
+}
+
#include "gt-mips.h"
--
Joseph S. Myers
joseph@codesourcery.com