| /* Definitions for Intel 386 running Linux-based GNU systems with ELF format. |
| Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005, |
| 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| Contributed by Eric Youngdale. |
| Modified for stabs-in-ELF by H.J. Lu. |
| |
| 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/>. */ |
| |
| /* Output at beginning of assembler file. */ |
| /* The .file command should always begin the output. */ |
| #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true |
| |
| /* The svr4 ABI for the i386 says that records and unions are returned |
| in memory. */ |
| #undef DEFAULT_PCC_STRUCT_RETURN |
| #define DEFAULT_PCC_STRUCT_RETURN 1 |
| |
| /* We arrange for the whole %gs segment to map the tls area. */ |
| #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT |
| #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS |
| |
| #undef ASM_COMMENT_START |
| #define ASM_COMMENT_START "#" |
| |
| #undef DBX_REGISTER_NUMBER |
| #define DBX_REGISTER_NUMBER(n) \ |
| (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) |
| |
| /* Output assembler code to FILE to call the profiler. |
| To the best of my knowledge, no Linux libc has required the label |
| argument to mcount. */ |
| |
| #define NO_PROFILE_COUNTERS 1 |
| |
| #undef MCOUNT_NAME |
| #define MCOUNT_NAME "mcount" |
| |
| /* The GLIBC version of mcount for the x86 assumes that there is a |
| frame, so we cannot allow profiling without a frame pointer. */ |
| |
| #undef SUBTARGET_FRAME_POINTER_REQUIRED |
| #define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile |
| |
| #undef SIZE_TYPE |
| #define SIZE_TYPE "unsigned int" |
| |
| #undef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE "int" |
| |
| #undef WCHAR_TYPE |
| #define WCHAR_TYPE "long int" |
| |
| #undef WCHAR_TYPE_SIZE |
| #define WCHAR_TYPE_SIZE BITS_PER_WORD |
| |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| ROS_TARGET_OS_CPP_BUILTINS(); \ |
| } \ |
| while (0) |
| |
| #undef CPP_SPEC |
| #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" |
| |
| #undef CC1_SPEC |
| #define CC1_SPEC "%(cc1_cpu) %{profile:-p}" |
| |
| /* Provide a LINK_SPEC appropriate for Linux. Here we provide support |
| for the special GCC options -static and -shared, which allow us to |
| link things in one of these three modes by applying the appropriate |
| combinations of options at link-time. |
| |
| When the -shared link option is used a final link is not being |
| done. */ |
| |
| /* These macros may be overridden in k*bsd-gnu.h and i386/k*bsd-gnu.h. */ |
| #define LINK_EMULATION "elf_i386" |
| #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1" |
| |
| #undef ASM_SPEC |
| #define ASM_SPEC \ |
| "--32 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}" |
| |
| #undef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS \ |
| { "link_emulation", LINK_EMULATION },\ |
| { "dynamic_linker", GLIBC_DYNAMIC_LINKER } |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC "-m %(link_emulation) %{shared:-shared} \ |
| %{!shared: \ |
| %{!static: \ |
| %{rdynamic:-export-dynamic} \ |
| -dynamic-linker %(dynamic_linker)} \ |
| %{static:-static}}" |
| |
| /* Similar to standard Linux, but adding -ffast-math support. */ |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC \ |
| "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ |
| %{mpc32:crtprec32.o%s} \ |
| %{mpc64:crtprec64.o%s} \ |
| %{mpc80:crtprec80.o%s} \ |
| %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" |
| |
| /* 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) |
| |
| /* A C statement to output to the stdio stream FILE an assembler |
| command to advance the location counter to a multiple of 1<<LOG |
| bytes if it is within MAX_SKIP bytes. |
| |
| This is used to align code labels according to Intel recommendations. */ |
| |
| #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN |
| #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ |
| do { \ |
| if ((LOG) != 0) { \ |
| if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ |
| else { \ |
| fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ |
| /* Make sure that we have at least 8 byte alignment if > 8 byte \ |
| alignment is preferred. */ \ |
| if ((LOG) > 3 \ |
| && (1 << (LOG)) > ((MAX_SKIP) + 1) \ |
| && (MAX_SKIP) >= 7) \ |
| fputs ("\t.p2align 3\n", (FILE)); \ |
| } \ |
| } \ |
| } while (0) |
| #endif |
| |
| /* 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 |
| |
| /* Put all *tf routines in libgcc. */ |
| #undef LIBGCC2_HAS_TF_MODE |
| #define LIBGCC2_HAS_TF_MODE 1 |
| #define LIBGCC2_TF_CEXT q |
| #define TF_SIZE 113 |
| |
| #define TARGET_ASM_FILE_END file_end_indicate_exec_stack |
| |
| /* The stack pointer needs to be moved while checking the stack. */ |
| #define STACK_CHECK_MOVING_SP 1 |
| |
| /* Static stack checking is supported by means of probes. */ |
| #define STACK_CHECK_STATIC_BUILTIN 1 |
| |
| /* This macro may be overridden in i386/k*bsd-gnu.h. */ |
| #define REG_NAME(reg) reg |
| |
| #ifdef TARGET_LIBC_PROVIDES_SSP |
| /* i386 glibc provides __stack_chk_guard in %gs:0x14. */ |
| #define TARGET_THREAD_SSP_OFFSET 0x14 |
| |
| /* We steal the last transactional memory word. */ |
| #define TARGET_CAN_SPLIT_STACK |
| #define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30 |
| #endif |
