Add CFI support for MIPS.

Backported from binutils 2.17.

ok miod@

2 files changed, 16 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gas/config/tc-mips.c b/gnu/usr.bin/binutils/gas/config/tc-mips.c
index ace9b27a3bd..e1de55c59b5 100644
--- a/gnu/usr.bin/binutils/gas/config/tc-mips.c
+++ b/gnu/usr.bin/binutils/gas/config/tc-mips.c
@@ -33,6 +33,7 @@
 #include "opcode/mips.h"
 #include "itbl-ops.h"
 #include "dwarf2dbg.h"
+#include "dw2gencfi.h"
 
 #ifdef DEBUG
 #define DBG(x) printf x
@@ -14590,6 +14591,13 @@ mips_dwarf2_addr_size (void)
     return 4;
 }
 
+/* Standard calling conventions leave the CFA at SP on entry.  */
+void
+mips_cfi_frame_initial_instructions (void)
+{
+  cfi_add_CFA_def_cfa_register (SP);
+}
+
 int
 tc_mips_regname_to_dw2regnum (char *regname)
 {
diff --git a/gnu/usr.bin/binutils/gas/config/tc-mips.h b/gnu/usr.bin/binutils/gas/config/tc-mips.h
index 42f36c65869..7ed48e486cb 100644
--- a/gnu/usr.bin/binutils/gas/config/tc-mips.h
+++ b/gnu/usr.bin/binutils/gas/config/tc-mips.h
@@ -185,6 +185,14 @@ extern enum dwarf2_format mips_dwarf2_format (void);
 
 #define DWARF2_ADDR_SIZE(bfd) mips_dwarf2_addr_size ()
 
+#define TARGET_USE_CFIPOP 1
+
+#define tc_cfi_frame_initial_instructions mips_cfi_frame_initial_instructions
+extern void mips_cfi_frame_initial_instructions (void);
+
+#define DWARF2_DEFAULT_RETURN_COLUMN 31
+#define DWARF2_CIE_DATA_ALIGNMENT -4
+
 #define tc_regname_to_dw2regnum tc_mips_regname_to_dw2regnum
 extern int tc_mips_regname_to_dw2regnum (char *regname);