Add ARM CFI support

gas/ChangeLog

@@ -1,3 +1,19 @@
+2004-10-25  Daniel Jacobowitz  <dan@debian.org>
+
+	* Makefile.am: Run dep-am.
+	* aclocal.m4: Regenerate with automake 1.9.2.
+	* Makefile.in: Regenerate with automake 1.9.2.
+	* doc/Makefile.in: Likewise.
+
+	* config/tc-arm.c: Include "dw2gencfi.h".
+	(tc_arm_regname_to_dw2regnum, tc_arm_frame_initial_instructions):
+	New functions.
+	* config/tc-arm.h (TARGET_USE_CFIPOP, DWARF2_DEFAULT_RETURN_COLUMN)
+	(DWARF2_CIE_DATA_ALIGNMENT, tc_regname_to_dw2regnum)
+	(tc_cfi_frame_initial_instructions): Define.
+	(tc_arm_regname_to_dw2regnum, tc_arm_frame_initial_instructions):
+	Add prototypes.
+
 2004-10-21  Tomer Levi  <Tomer.Levi@nsc.com>
 
 	* config/tc-crx.c (assemble_insn): Check unsigned immediate

gas/Makefile.am

@@ -1036,7 +1036,7 @@ DEPTC_arm_elf = $(INCDIR)/symcat.h $(srcdir)/config/obj-elf.h \
   $(INCDIR)/elf/external.h $(INCDIR)/bfdlink.h $(srcdir)/config/tc-arm.h \
   $(INCDIR)/safe-ctype.h subsegs.h $(INCDIR)/obstack.h \
   $(INCDIR)/opcode/arm.h $(INCDIR)/elf/arm.h $(INCDIR)/elf/reloc-macros.h \
-  dwarf2dbg.h
+  dwarf2dbg.h dw2gencfi.h $(INCDIR)/elf/dwarf2.h
 DEPTC_avr_coff = $(INCDIR)/symcat.h $(srcdir)/config/obj-coff.h \
   $(srcdir)/config/tc-avr.h $(INCDIR)/coff/internal.h \
   $(BFDDIR)/libcoff.h $(INCDIR)/bfdlink.h $(INCDIR)/safe-ctype.h \

gas/Makefile.in

@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.9.1 from Makefile.am.
+# Makefile.in generated by automake 1.9.2 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
@@ -825,7 +825,7 @@ DEPTC_arm_elf = $(INCDIR)/symcat.h $(srcdir)/config/obj-elf.h \
   $(INCDIR)/elf/external.h $(INCDIR)/bfdlink.h $(srcdir)/config/tc-arm.h \
   $(INCDIR)/safe-ctype.h subsegs.h $(INCDIR)/obstack.h \
   $(INCDIR)/opcode/arm.h $(INCDIR)/elf/arm.h $(INCDIR)/elf/reloc-macros.h \
-  dwarf2dbg.h
+  dwarf2dbg.h dw2gencfi.h $(INCDIR)/elf/dwarf2.h
 
 DEPTC_avr_coff = $(INCDIR)/symcat.h $(srcdir)/config/obj-coff.h \
   $(srcdir)/config/tc-avr.h $(INCDIR)/coff/internal.h \
@@ -2857,9 +2857,9 @@ distclean-generic:
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
-	-rm -f m68k-parse.c
 	-rm -f itbl-lex.c
 	-rm -f itbl-parse.c
+	-rm -f m68k-parse.c
 clean: clean-recursive
 
 clean-am: clean-generic clean-libtool clean-noinstPROGRAMS \

gas/aclocal.m4

@@ -1,4 +1,4 @@
-# generated automatically by aclocal 1.9.1 -*- Autoconf -*-
+# generated automatically by aclocal 1.9.2 -*- Autoconf -*-
 
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
 # Free Software Foundation, Inc.
@@ -40,7 +40,7 @@ AC_DEFUN([AM_AUTOMAKE_VERSION], [am__api_version="1.9"])
 # Call AM_AUTOMAKE_VERSION so it can be traced.
 # This function is AC_REQUIREd by AC_INIT_AUTOMAKE.
 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
-	 [AM_AUTOMAKE_VERSION([1.9.1])])
+	 [AM_AUTOMAKE_VERSION([1.9.2])])
 
 # AM_AUX_DIR_EXPAND
 

gas/config/tc-arm.c

@@ -41,6 +41,7 @@
 #ifdef OBJ_ELF
 #include "elf/arm.h"
 #include "dwarf2dbg.h"
+#include "dw2gencfi.h"
 #endif
 
 /* XXX Set this to 1 after the next binutils release.  */
@@ -14859,6 +14860,31 @@ arm_init_frag (fragS * fragP)
   fragP->tc_frag_data = thumb_mode;
 }
 
+#ifdef OBJ_ELF
+
+/* Convert REGNAME to a DWARF-2 register number.  */
+
+int
+tc_arm_regname_to_dw2regnum (const char *regname)
+{
+  unsigned int i;
+
+  for (i = 0; rn_table[i].name; i++)
+    if (streq (regname, rn_table[i].name))
+      return rn_table[i].number;
+
+  return -1;
+}
+
+/* Initialize the DWARF-2 unwind information for this procedure.  */
+
+void
+tc_arm_frame_initial_instructions (void)
+{
+  cfi_add_CFA_def_cfa (REG_SP, 0);
+}
+#endif
+
 /* This table describes all the machine specific pseudo-ops the assembler
    has to support.  The fields are:
      pseudo-op name without dot

gas/config/tc-arm.h

@@ -180,6 +180,19 @@ enum mstate
   MAP_THUMB
 };
 
+/* We want .cfi_* pseudo-ops for generating unwind info.  */
+#define TARGET_USE_CFIPOP              1
+
+/* The lr register is r14.  */
+#define DWARF2_DEFAULT_RETURN_COLUMN  14
+
+/* Registers are generally saved at negative offsets to the CFA.  */
+#define DWARF2_CIE_DATA_ALIGNMENT     -4
+
+/* CFI hooks.  */
+#define tc_regname_to_dw2regnum            tc_arm_regname_to_dw2regnum
+#define tc_cfi_frame_initial_instructions  tc_arm_frame_initial_instructions
+
 #else /* Not OBJ_ELF.  */
 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
 #endif
@@ -211,4 +224,5 @@ extern void arm_init_frag (struct frag *);
 extern void arm_handle_align (struct frag *);
 extern bfd_boolean arm_fix_adjustable (struct fix *);
 extern int arm_elf_section_type (const char *, size_t);
-
+extern int tc_arm_regname_to_dw2regnum (const char *regname);
+extern void tc_arm_frame_initial_instructions (void);

gas/doc/Makefile.in

@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.9.1 from Makefile.am.
+# Makefile.in generated by automake 1.9.2 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,

gas/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2004-10-23  Daniel Jacobowitz  <dan@debian.org>
+
+	* gas/cfi/cfi-arm-1.d, gas/cfi/cfi-arm-1.s: New files.
+	* gas/cfi/cfi.exp: Run cfi-arm-1 test.
+
 2004-10-21  Tomer Levi  <Tomer.Levi@nsc.com>
 
 	* gas/crx/cop_insn.s: Reverse operands order in store co-processor 

gas/testsuite/gas/cfi/cfi-arm-1.d

@@ -0,0 +1,27 @@
+#readelf: -wf
+#name: CFI on ARM
+
+The section .eh_frame contains:
+
+00000000 00000010 00000000 CIE
+  Version:               1
+  Augmentation:          "zR"
+  Code alignment factor: 2
+  Data alignment factor: -4
+  Return address column: 14
+  Augmentation data:     1b
+
+  DW_CFA_def_cfa: r13 ofs 0
+
+00000014 00000020 00000018 FDE cie=00000000 pc=00000000..00000018
+  DW_CFA_advance_loc: 4 to 00000004
+  DW_CFA_def_cfa: r12 ofs 0
+  DW_CFA_advance_loc: 4 to 00000008
+  DW_CFA_def_cfa: r13 ofs 16
+  DW_CFA_advance_loc: 4 to 0000000c
+  DW_CFA_def_cfa_offset: 32
+  DW_CFA_offset: r11 at cfa-32
+  DW_CFA_offset: r14 at cfa-24
+  DW_CFA_advance_loc: 4 to 00000010
+  DW_CFA_def_cfa: r11 ofs 16
+

gas/testsuite/gas/cfi/cfi-arm-1.s

@@ -0,0 +1,23 @@
+#; $ as -o test.o gas-cfi-test.s && gcc -nostdlib -o test test.o
+
+	.file   "a.c"
+	.text
+	.align 2
+	.global foo
+	.type   foo, %function
+foo:
+	.cfi_startproc
+	mov	ip, sp
+	.cfi_def_cfa ip, 0
+	stmfd	sp!, {r0, r1, r2, r3}
+	.cfi_def_cfa sp, 16
+	stmfd	sp!, {fp, ip, lr, pc}
+	.cfi_adjust_cfa_offset 16
+	.cfi_rel_offset r11, 0
+	.cfi_rel_offset lr, 8
+	sub	fp, ip, #20
+	.cfi_def_cfa fp, 16
+	nop
+	ldmea	fp, {fp, sp, pc}
+	.cfi_endproc
+	.size   foo, .-foo

gas/testsuite/gas/cfi/cfi.exp

@@ -56,6 +56,9 @@ if [istarget "x86_64-*"] then {
 	run_dump_test "cfi-sh-1"
     }
 
+} elseif { [istarget "arm*-*"] || [istarget "xscale*-*"] } then {
+    run_dump_test "cfi-arm-1"
+
 } else {
     return
 }