diff options
Diffstat (limited to 'gcc/config/ia64/sysv4.h')
| -rw-r--r-- | gcc/config/ia64/sysv4.h | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/gcc/config/ia64/sysv4.h b/gcc/config/ia64/sysv4.h new file mode 100644 index 00000000000..6e5efdb89d6 --- /dev/null +++ b/gcc/config/ia64/sysv4.h @@ -0,0 +1,248 @@ +/* Override definitions in elfos.h/svr4.h to be correct for IA64. */ + +/* We want DWARF2 as specified by the IA64 ABI. */ +#undef PREFERRED_DEBUGGING_TYPE +#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG + +/* Various pseudo-ops for which the Intel assembler uses non-standard + definitions. */ + +#undef ASM_BYTE_OP +#define ASM_BYTE_OP "data1" + +#undef STRING_ASM_OP +#define STRING_ASM_OP "stringz" + +#undef SKIP_ASM_OP +#define SKIP_ASM_OP ".skip" + +#undef COMMON_ASM_OP +#define COMMON_ASM_OP ".common" + +#undef ASCII_DATA_ASM_OP +#define ASCII_DATA_ASM_OP "string" + +/* ??? Unfortunately, .lcomm doesn't work, because it puts things in either + .bss or .sbss, and we can't control the decision of which is used. When + I use .lcomm, I get a cryptic "Section group has no member" error from + the Intel simulator. So we must explicitly put variables in .bss + instead. This matters only if we care about the Intel assembler. */ + +/* This is asm_output_aligned_bss from varasm.c without the ASM_GLOBALIZE_LABEL + call at the beginning. */ + +/* This is for final.c, because it is used by ASM_DECLARE_OBJECT_NAME. */ +extern int size_directive_output; + +#undef ASM_OUTPUT_ALIGNED_LOCAL +#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ +do { \ + if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0] == SDATA_NAME_FLAG_CHAR) \ + sbss_section (); \ + else \ + bss_section (); \ + ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT)); \ + ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \ + ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1); \ +} while (0) + +/* ??? Intel assembler does not allow "." in section names, so turn off + gnu.linkonce section support, but only when using the Intel assembler. */ +#undef UNIQUE_SECTION_P +#define UNIQUE_SECTION_P(DECL) (TARGET_GNU_AS ? DECL_ONE_ONLY (DECL) : 0) + +/* The # tells the Intel assembler that this is not a register name. + However, we can't emit the # in a label definition, so we set a variable + in ASM_OUTPUT_LABEL to control whether we want the postfix here or not. */ + +#undef ASM_OUTPUT_LABELREF +#define ASM_OUTPUT_LABELREF(STREAM, NAME) \ +do \ + { \ + const char *real_name; \ + STRIP_NAME_ENCODING (real_name, NAME); \ + asm_fprintf (STREAM, "%U%s%s", real_name, \ + (ia64_asm_output_label ? "" : "#")); \ + } \ +while (0) + +/* Intel assembler requires both flags and type if declaring a non-predefined + section. */ +#undef INIT_SECTION_ASM_OP +#define INIT_SECTION_ASM_OP ".section\t.init,\"ax\",\"progbits\"" +#undef FINI_SECTION_ASM_OP +#define FINI_SECTION_ASM_OP ".section\t.fini,\"ax\",\"progbits\"" +#undef CTORS_SECTION_ASM_OP +#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\",\"progbits\"" +#undef DTORS_SECTION_ASM_OP +#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\",\"progbits\"" + +/* A C statement (sans semicolon) to output an element in the table of + global constructors. */ +/* Must override this to get @fptr relocation. */ +#undef ASM_OUTPUT_CONSTRUCTOR +#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ + do { \ + ctors_section (); \ + fputs ("\tdata8\t @fptr(", FILE); \ + assemble_name (FILE, NAME); \ + fputs (")\n", FILE); \ + } while (0) + +/* A C statement (sans semicolon) to output an element in the table of + global destructors. */ +/* Must override this to get @fptr relocation. */ +#undef ASM_OUTPUT_DESTRUCTOR +#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ + do { \ + dtors_section (); \ + fputs ("\tdata8\t @fptr(", FILE); \ + assemble_name (FILE, NAME); \ + fputs (")\n", FILE); \ + } while (0) + +/* svr4.h undefines this, so we need to define it here. */ +#define DBX_REGISTER_NUMBER(REGNO) \ + (IN_REGNO_P (REGNO) ? (32 + (REGNO) - IN_REG (0)) \ + : LOC_REGNO_P (REGNO) ? (32 + ia64_input_regs + \ + (REGNO) - LOC_REG (0)) \ + : OUT_REGNO_P (REGNO) ? (32 + ia64_input_regs + ia64_local_regs \ + + (REGNO) - OUT_REG (0)) \ + : (REGNO) == FRAME_POINTER_REGNUM ? ia64_fp_regno \ + : (REGNO)) + +/* Things that svr4.h defines to the wrong type, because it assumes 32 bit + ints and 32 bit longs. */ + +#undef SIZE_TYPE +#define SIZE_TYPE "long unsigned int" + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "long int" + +#undef WCHAR_TYPE +#define WCHAR_TYPE "int" + +#undef WCHAR_TYPE_SIZE +#define WCHAR_TYPE_SIZE 32 + +/* We don't want any symbol at the beginning of the file. This is defined in + dbxelf.h which is included from elfos.h, so we need to undef/define it + here. */ + +#undef ASM_IDENTIFY_GCC +#define ASM_IDENTIFY_GCC(FILE) + +/* We redefine this to use the ia64 .proc pseudo-op. */ + +#undef ASM_DECLARE_FUNCTION_NAME +#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ +do { \ + fputs ("\t.proc ", FILE); \ + assemble_name (FILE, NAME); \ + fputc ('\n', FILE); \ + ASM_OUTPUT_LABEL (FILE, NAME); \ +} while (0) + +/* We redefine this to use the ia64 .endp pseudo-op. */ + +#undef ASM_DECLARE_FUNCTION_SIZE +#define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \ +do { \ + fputs ("\t.endp ", FILE); \ + assemble_name (FILE, NAME); \ + fputc ('\n', FILE); \ +} while (0) + +/* A C expression which outputs to the stdio stream STREAM some appropriate + text to go at the start of an assembler file. */ + +/* ??? Looks like almost every port, except for a few original ones, get this + wrong. Must emit #NO_APP as first line of file to turn of special assembler + preprocessing of files. */ + +/* ??? Even worse, it doesn't work, because gas does not accept the tab chars + that dwarf2out.c emits when #NO_APP. */ + +/* ??? Unrelated, but dwarf2out.c emits unnecessary newlines after strings, + may as well fix at the same time. */ + +#if 0 +#undef ASM_FILE_START +#define ASM_FILE_START(STREAM) \ +do { \ + fputs (ASM_APP_OFF, STREAM); \ + output_file_directive (STREAM, main_input_filename); \ +} while (0) +#endif + +/* Case label alignment is handled by ADDR_VEC_ALIGN now. */ + +#undef ASM_OUTPUT_BEFORE_CASE_LABEL +#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) + +/* We override svr4.h so that we can support the sdata section. */ + +#undef SELECT_SECTION +#define SELECT_SECTION(DECL,RELOC) \ +{ \ + if (TREE_CODE (DECL) == STRING_CST) \ + { \ + if (! flag_writable_strings) \ + const_section (); \ + else \ + data_section (); \ + } \ + else if (TREE_CODE (DECL) == VAR_DECL) \ + { \ + if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0] \ + == SDATA_NAME_FLAG_CHAR) \ + sdata_section (); \ + /* ??? We need the extra ! RELOC check, because the default is to \ + only check RELOC if flag_pic is set, and we don't set flag_pic \ + (yet?). */ \ + else if (DECL_READONLY_SECTION (DECL, RELOC) && ! (RELOC)) \ + const_section (); \ + else \ + data_section (); \ + } \ + else \ + const_section (); \ +} + +#undef EXTRA_SECTIONS +#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_sdata, in_sbss + +#undef EXTRA_SECTION_FUNCTIONS +#define EXTRA_SECTION_FUNCTIONS \ + CONST_SECTION_FUNCTION \ + CTORS_SECTION_FUNCTION \ + DTORS_SECTION_FUNCTION \ + SDATA_SECTION_FUNCTION \ + SBSS_SECTION_FUNCTION + +#define SDATA_SECTION_ASM_OP ".sdata" + +#define SDATA_SECTION_FUNCTION \ +void \ +sdata_section () \ +{ \ + if (in_section != in_sdata) \ + { \ + fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \ + in_section = in_sdata; \ + } \ +} + +#define SBSS_SECTION_ASM_OP ".sbss" + +#define SBSS_SECTION_FUNCTION \ +void \ +sbss_section () \ +{ \ + if (in_section != in_sbss) \ + { \ + fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \ + in_section = in_sbss; \ + } \ +} |