diff options
Diffstat (limited to 'gcc-4.4.0/gcc/config/i386/sysv4.h')
| -rw-r--r-- | gcc-4.4.0/gcc/config/i386/sysv4.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/gcc-4.4.0/gcc/config/i386/sysv4.h b/gcc-4.4.0/gcc/config/i386/sysv4.h new file mode 100644 index 000000000..bedac7a58 --- /dev/null +++ b/gcc-4.4.0/gcc/config/i386/sysv4.h @@ -0,0 +1,132 @@ +/* Target definitions for GCC for Intel 80386 running System V.4 + Copyright (C) 1991, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. + + Written by Ron Guilmette (rfg@netcom.com). + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + + +#define TARGET_VERSION fprintf (stderr, " (i386 System V Release 4)"); + +/* The svr4 ABI for the i386 says that records and unions are returned + in memory. */ + +#define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \ + (TYPE_MODE (TYPE) == BLKmode \ + || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8)); + +/* Output at beginning of assembler file. */ +/* The .file command should always begin the output. */ + +#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true +#undef X86_FILE_START_VERSION_DIRECTIVE +#define X86_FILE_START_VERSION_DIRECTIVE true + +#undef DBX_REGISTER_NUMBER +#define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n] + +/* The routine used to output sequences of byte values. We use a special + version of this for most svr4 targets because doing so makes the + generated assembly code more compact (and thus faster to assemble) + as well as more readable. Note that if we find subparts of the + character sequence which end with NUL (and which are shorter than + STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */ + +#undef ASM_OUTPUT_ASCII +#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ + do \ + { \ + const unsigned char *_ascii_bytes = \ + (const unsigned char *) (STR); \ + const unsigned char *limit = _ascii_bytes + (LENGTH); \ + unsigned bytes_in_chunk = 0; \ + for (; _ascii_bytes < limit; _ascii_bytes++) \ + { \ + const unsigned char *p; \ + if (bytes_in_chunk >= 64) \ + { \ + fputc ('\n', (FILE)); \ + bytes_in_chunk = 0; \ + } \ + for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \ + continue; \ + if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT) \ + { \ + if (bytes_in_chunk > 0) \ + { \ + fputc ('\n', (FILE)); \ + bytes_in_chunk = 0; \ + } \ + ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \ + _ascii_bytes = p; \ + } \ + else \ + { \ + if (bytes_in_chunk == 0) \ + fprintf ((FILE), "\t.byte\t"); \ + else \ + fputc (',', (FILE)); \ + fprintf ((FILE), "0x%02x", *_ascii_bytes); \ + bytes_in_chunk += 5; \ + } \ + } \ + if (bytes_in_chunk > 0) \ + fprintf ((FILE), "\n"); \ + } \ + while (0) + +/* A C statement (sans semicolon) to output to the stdio stream + FILE the assembler definition of uninitialized global DECL named + NAME whose size is SIZE bytes and alignment is ALIGN bytes. + Try to use asm_output_aligned_bss to implement this macro. */ + +#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ + asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) + +/* Handle special EH pointer encodings. Absolute, pc-relative, and + indirect are handled automatically. */ +#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ + do { \ + if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel) \ + { \ + fputs (ASM_LONG, FILE); \ + assemble_name (FILE, XSTR (ADDR, 0)); \ + fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \ + goto DONE; \ + } \ + } while (0) + +/* Used by crtstuff.c to initialize the base of data-relative relocations. + These are GOT relative on x86, so return the pic register. */ +#ifdef __PIC__ +#define CRT_GET_RFIB_DATA(BASE) \ + { \ + register void *ebx_ __asm__("ebx"); \ + BASE = ebx_; \ + } +#else +#define CRT_GET_RFIB_DATA(BASE) \ + __asm__ ("call\t.LPR%=\n" \ + ".LPR%=:\n\t" \ + "pop{l}\t%0\n\t" \ + /* Due to a GAS bug, this cannot use EAX. That encodes \ + smaller than the traditional EBX, which results in the \ + offset being off by one. */ \ + "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \ + "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \ + : "=d"(BASE)) +#endif |