/* Target definitions for GNU compiler for Sparc running System V.4
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1992 Free Software Foundation, Inc.
Written by Ron Guilmette (rfg@ncd.com).
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "sparc.h"
+
+/* Undefine some symbols which are defined in "sparc.h" but which are
+ appropriate only for SunOS 4.x, and not for svr4. */
+
+#undef DBX_DEBUGGING_INFO
+#undef WORD_SWITCH_TAKES_ARG
+#undef SELECT_SECTION
+#undef ASM_DECLARE_FUNCTION_NAME
+#undef TEXT_SECTION_ASM_OP
+#undef DATA_SECTION_ASM_OP
+
#include "svr4.h"
+/* Undefined some symbols which are defined in "svr4.h" but which are
+ appropriate only for typical svr4 systems, but not for the specific
+ case of svr4 running on a Sparc. */
+
+#undef CTORS_SECTION_ASM_OP
+#undef DTORS_SECTION_ASM_OP
+#undef INIT_SECTION_ASM_OP
+#undef CONST_SECTION_ASM_OP
+#undef TYPE_OPERAND_FMT
+#undef PUSHSECTION_FORMAT
+#undef STRING_ASM_OP
+#undef COMMON_ASM_OP
+#undef SKIP_ASM_OP
+#undef DEF_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
+#undef ASM_GENERATE_INTERNAL_LABEL
+#undef ASM_OUTPUT_INTERNAL_LABEL
+
/* Provide a set of pre-definitions and pre-assertions appropriate for
- the sparc running svr4. __svr4__ is our extension. */
+ the Sparc running svr4. __svr4__ is our extension. */
#define CPP_PREDEFINES \
"-Dsparc -Dunix -D__svr4__ -Asystem(unix) -Acpu(sparc) -Amachine(sparc)"
+/* This is the string used to begin an assembly language comment for the
+ Sparc/svr4 assembler. */
+
#define ASM_COMMENT_START "!"
-#undef TYPE_OPERAND_FMT
+/* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
+ Note that many of these are different from the typical pseudo-ops used
+ by most svr4 assemblers. That is probably due to a (misguided?) attempt
+ to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
+ assembler. */
+
+#define STRING_ASM_OP "\t.asciz"
+#define COMMON_ASM_OP "\t.common"
+#define SKIP_ASM_OP "\t.skip"
+#define UNALIGNED_INT_ASM_OP "\t.uaword"
+#define UNALIGNED_SHORT_ASM_OP "\t.uahalf"
+#define PUSHSECTION_ASM_OP "\t.pushsection"
+#define POPSECTION_ASM_OP "\t.popsection"
+
+/* This is the format used to print the second operand of a .type pseudo-op
+ for the Sparc/svr4 assembler. */
+
#define TYPE_OPERAND_FMT "#%s"
-/* Define how the sparc registers should be numbered for Dwarf output.
+/* This is the format used to print a .pushsection pseudo-op (and its operand)
+ for the Sparc/svr4 assembler. */
+
+#define PUSHSECTION_FORMAT "%s\t\"%s\"\n"
+
+/* This is how to equate one symbol to another symbol. The syntax used is
+ `SYM1=SYM2'. Note that this is different from the way equates are done
+ with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'. */
+
+#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
+ do { fprintf ((FILE), "\t"); \
+ assemble_name (FILE, LABEL1); \
+ fprintf (FILE, " = "); \
+ assemble_name (FILE, LABEL2); \
+ fprintf (FILE, "\n"); \
+ } while (0)
+
+/* Generate the special assembly code needed to align the start of a jump
+ tables. Under svr4, jump tables go into the .rodata section. Other
+ things (e.g. constants) may be put into the .rodata section too, and
+ those other things may end on odd (i.e. unaligned) boundaries, so we
+ need to get re-aligned just before we output each jump table. */
+
+#define ASM_OUTPUT_ALIGN_JUMP_TABLE(FILE) ASM_OUTPUT_ALIGN ((FILE), 2)
+
+/* This is how to output an internal numbered label where
+ PREFIX is the class of label and NUM is the number within the class.
+
+ If the NUM argument is negative, we don't use it when generating the
+ label.
+
+ For most svr4 systems, the convention is that any symbol which begins
+ with a period is not put into the linker symbol table by the assembler,
+ however the current Sparc/svr4 assembler is brain-dammaged and it needs
+ to see `.L' at the start of a symbol or else it will be put into the
+ linker symbol table.
+*/
+
+#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
+do { \
+ if ((int) (NUM) >= 0) \
+ fprintf (FILE, ".L%s%d:\n", PREFIX, NUM); \
+ else \
+ fprintf (FILE, ".L%s:\n", PREFIX); \
+} while (0)
+
+/* This is how to store into the string LABEL
+ the symbol_ref name of an internal numbered label where
+ PREFIX is the class of label and NUM is the number within the class.
+ This is suitable for output with `assemble_name'.
+
+ If the NUM argument is negative, we don't use it when generating the
+ label.
+
+ For most svr4 systems, the convention is that any symbol which begins
+ with a period is not put into the linker symbol table by the assembler,
+ however the current Sparc/svr4 assembler is brain-dammaged and it needs
+ to see `.L' at the start of a symbol or else it will be put into the
+ linker symbol table.
+*/
+
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
+do { \
+ if ((int) (NUM) >= 0) \
+ sprintf (LABEL, "*.L%s%d", PREFIX, NUM); \
+ else \
+ sprintf (LABEL, "*.L%s", PREFIX); \
+} while (0)
+
+/* Define how the Sparc registers should be numbered for Dwarf output.
The numbering provided here should be compatible with the native
- svr4 SDB debugger in the sparc/svr4 reference port. */
+ svr4 SDB debugger in the Sparc/svr4 reference port. The numbering
+ is as follows:
+
+ Assembly name gcc internal regno Dwarf regno
+ ----------------------------------------------------------
+ g0-g7 0-7 0-7
+ o0-o7 8-15 8-15
+ l0-l7 16-23 16-23
+ i0-i7 24-31 24-31
+ f0-f31 32-63 40-71
+*/
#define DBX_REGISTER_NUMBER(REGNO) \
- ((REGNO) < 32) ? (REGNO) : ((REGNO) + 8))
+ (((REGNO) < 32) ? (REGNO) \
+ : ((REGNO) < 63) ? ((REGNO) + 8) \
+ : (abort (), 0))
-/* A pair of defines for the set of pseudo-ops used to switch to the
- .ctors and .dtors sections. Note that on the sparc, all user-defined
- sections have the "progbits" attribute by default, so we don't even
- specify it here. */
+/* A set of symbol definitions for assembly pseudo-ops which will
+ get us switched to various sections of interest. These are used
+ in all places where we simply want to switch to a section, and
+ *not* to push the previous section name onto the assembler's
+ section names stack (as we do often in dwarfout.c). */
-#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\""
-#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\""
+#define TEXT_SECTION_ASM_OP "\t.section\t\".text\""
+#define DATA_SECTION_ASM_OP "\t.section\t\".data\""
+#define BSS_SECTION_ASM_OP "\t.section\t\".bss\""
+#define CONST_SECTION_ASM_OP "\t.section\t\".rodata\""
+#define INIT_SECTION_ASM_OP "\t.section\t\".init\",#alloc"
+#define CTORS_SECTION_ASM_OP "\t.section\t\".ctors\",#alloc"
+#define DTORS_SECTION_ASM_OP "\t.section\t\".dtors\",#alloc"
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