freebsd.h revision 114077
1107286Sobrien/* Definitions for Intel 386 running FreeBSD with ELF format 295349Sobrien Copyright (C) 1996, 2000, 2002 Free Software Foundation, Inc. 334229Speter Contributed by Eric Youngdale. 434229Speter Modified for stabs-in-ELF by H.J. Lu. 551408Sobrien Adapted from GNU/Linux version by John Polstra. 652112Sobrien Continued development by David O'Brien <obrien@freebsd.org> 718334Speter 818334SpeterThis file is part of GNU CC. 918334Speter 1018334SpeterGNU CC is free software; you can redistribute it and/or modify 1118334Speterit under the terms of the GNU General Public License as published by 1218334Speterthe Free Software Foundation; either version 2, or (at your option) 1318334Speterany later version. 1418334Speter 1518334SpeterGNU CC is distributed in the hope that it will be useful, 1618334Speterbut WITHOUT ANY WARRANTY; without even the implied warranty of 1718334SpeterMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1818334SpeterGNU General Public License for more details. 1918334Speter 2018334SpeterYou should have received a copy of the GNU General Public License 2118334Speteralong with GNU CC; see the file COPYING. If not, write to 2218334Speterthe Free Software Foundation, 59 Temple Place - Suite 330, 2318334SpeterBoston, MA 02111-1307, USA. */ 2418334Speter 2551408Sobrien/* $FreeBSD: head/contrib/gcc/config/i386/freebsd.h 114077 2003-04-26 19:16:54Z obrien $ */ 2618334Speter 2758478Sobrien#undef CC1_SPEC 28114077Sobrien#define CC1_SPEC "%(cc1_cpu) %{profile:-p}" 2951408Sobrien 3058478Sobrien#undef ASM_SPEC 31107286Sobrien#define ASM_SPEC "%{v*: -v}" 3258478Sobrien 3395349Sobrien#undef ASM_FINAL_SPEC 3458478Sobrien#define ASM_FINAL_SPEC "%|" 3558478Sobrien 3658478Sobrien/* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 3758478Sobrien for the special GCC options -static and -shared, which allow us to 3858478Sobrien link things in one of these three modes by applying the appropriate 3958478Sobrien combinations of options at link-time. We like to support here for 4058478Sobrien as many of the other GNU linker options as possible. But I don't 4158478Sobrien have the time to search for those flags. I am sure how to add 4258478Sobrien support for -soname shared_object_name. H.J. 4358478Sobrien 4458478Sobrien When the -shared link option is used a final link is not being 4558478Sobrien done. */ 4658478Sobrien 4758478Sobrien#undef LINK_SPEC 4858478Sobrien#define LINK_SPEC "\ 4958478Sobrien %{p:%e`-p' not supported; use `-pg' and gprof(1)} \ 5058478Sobrien %{Wl,*:%*} \ 5195349Sobrien %{v:-V} \ 5258478Sobrien %{assert*} %{R*} %{rpath*} %{defsym*} \ 5358478Sobrien %{shared:-Bshareable %{h*} %{soname*}} \ 5458478Sobrien %{!shared: \ 5558478Sobrien %{!static: \ 5658478Sobrien %{rdynamic: -export-dynamic} \ 5758478Sobrien %{!dynamic-linker: -dynamic-linker /usr/libexec/ld-elf.so.1}} \ 5895349Sobrien %{static:-Bstatic}} \ 59107286Sobrien %{symbolic:-Bsymbolic}" 6058478Sobrien 6195349Sobrien/* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add the magical 6295349Sobrien crtbegin.o file (see crtstuff.c) which provides part of the support for 6395349Sobrien getting C++ file-scope static object constructed before entering `main'. */ 6495349Sobrien 6558478Sobrien#undef STARTFILE_SPEC 6658478Sobrien#define STARTFILE_SPEC "\ 6758478Sobrien %{!shared: \ 6858478Sobrien %{pg:gcrt1.o%s} \ 6958478Sobrien %{!pg: \ 7058478Sobrien %{p:gcrt1.o%s} \ 7158478Sobrien %{!p:crt1.o%s}}} \ 7295349Sobrien crti.o%s \ 7395349Sobrien %{!shared:crtbegin.o%s} \ 74107286Sobrien %{shared:crtbeginS.o%s}" 7558478Sobrien 7658478Sobrien/* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386. Here we tack on our 7795349Sobrien own magical crtend.o file (see crtstuff.c) which provides part of the 7858478Sobrien support for getting C++ file-scope static object constructed before 7958478Sobrien entering `main', followed by the normal "finalizer" file, `crtn.o'. */ 8058478Sobrien 8158478Sobrien#undef ENDFILE_SPEC 8258478Sobrien#define ENDFILE_SPEC "\ 8358478Sobrien %{!shared:crtend.o%s} \ 84107286Sobrien %{shared:crtendS.o%s} crtn.o%s" 8558478Sobrien 8658478Sobrien 8758478Sobrien/************************[ Target stuff ]***********************************/ 8858478Sobrien 8995349Sobrien/* Define the actual types of some ANSI-mandated types. 9058478Sobrien Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 9158478Sobrien c-common.c, and config/<arch>/<arch>.h. */ 9258478Sobrien 9395349Sobrien#undef SIZE_TYPE 9498597Sobrien#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 9595349Sobrien 9695349Sobrien#undef PTRDIFF_TYPE 9798597Sobrien#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 9858478Sobrien 9995349Sobrien#undef WCHAR_TYPE_SIZE 10098597Sobrien#define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD) 10195349Sobrien 10258478Sobrien#undef TARGET_VERSION 10358478Sobrien#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)"); 10458478Sobrien 10534229Speter#define MASK_PROFILER_EPILOGUE 010000000000 10618349Speter 10734229Speter#define TARGET_PROFILER_EPILOGUE (target_flags & MASK_PROFILER_EPILOGUE) 108107286Sobrien#define TARGET_ELF 1 10918349Speter 11034229Speter#undef SUBTARGET_SWITCHES 11152112Sobrien#define SUBTARGET_SWITCHES \ 11268601Sobrien { "profiler-epilogue", MASK_PROFILER_EPILOGUE, "Function profiler epilogue"}, \ 113107286Sobrien { "no-profiler-epilogue", -MASK_PROFILER_EPILOGUE, "No function profiler epilogue"}, 11418349Speter 11558478Sobrien/* This goes away when the math emulator is fixed. */ 11695810Sobrien#undef TARGET_SUBTARGET_DEFAULT 11795810Sobrien#define TARGET_SUBTARGET_DEFAULT \ 11858478Sobrien (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387) 11958478Sobrien 12095349Sobrien/* Don't default to pcc-struct-return, we want to retain compatibility with 12195349Sobrien older gcc versions AND pcc-struct-return is nonreentrant. 12295349Sobrien (even though the SVR4 ABI for the i386 says that records and unions are 12395349Sobrien returned in memory). */ 12418349Speter 12595349Sobrien#undef DEFAULT_PCC_STRUCT_RETURN 12695349Sobrien#define DEFAULT_PCC_STRUCT_RETURN 0 12795349Sobrien 12858478Sobrien/* Tell final.c that we don't need a label passed to mcount. */ 12995810Sobrien#define NO_PROFILE_COUNTERS 1 13058478Sobrien 13158478Sobrien/* Output assembler code to FILE to begin profiling of the current function. 13258478Sobrien LABELNO is an optional label. */ 13358478Sobrien 13458478Sobrien#undef FUNCTION_PROFILER 13558478Sobrien#define FUNCTION_PROFILER(FILE, LABELNO) \ 13658478Sobrien do { \ 13758478Sobrien if (flag_pic) \ 138107286Sobrien fprintf ((FILE), "\tcall *.mcount%s@GOT(%%ebx)\n"); \ 13958478Sobrien else \ 140107286Sobrien fprintf ((FILE), "\tcall .mcount\n"); \ 14158478Sobrien } while (0) 14258478Sobrien 14358478Sobrien/* Output assembler code to FILE to end profiling of the current function. */ 14458478Sobrien 14595810Sobrien#undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */ 14658478Sobrien 14758478Sobrien 14858478Sobrien/************************[ Assembler stuff ]********************************/ 14958478Sobrien 15095348Sobrien/* Override the default comment-starter of "/" from unix.h. */ 15195348Sobrien#undef ASM_COMMENT_START 15295348Sobrien#define ASM_COMMENT_START "#" 15395348Sobrien 15496144Sobrien/* Override the default comment-starter of "/APP" from unix.h. */ 15558478Sobrien#undef ASM_APP_ON 15658478Sobrien#define ASM_APP_ON "#APP\n" 15758478Sobrien#undef ASM_APP_OFF 15895349Sobrien#define ASM_APP_OFF "#NO_APP\n" 15958478Sobrien 160107286Sobrien/* XXX:DEO do we still need this override to defaults.h ?? */ 16158478Sobrien/* This is how to output a reference to a user-level label named NAME. */ 16258478Sobrien#undef ASM_OUTPUT_LABELREF 16358478Sobrien#define ASM_OUTPUT_LABELREF(FILE, NAME) \ 16458478Sobrien do { \ 16558478Sobrien char *_name = (NAME); \ 16658478Sobrien /* Hack to avoid writing lots of rtl in \ 16758478Sobrien FUNCTION_PROFILER_EPILOGUE (). */ \ 16858478Sobrien if (*_name == '.' && strcmp(_name + 1, "mexitcount") == 0) \ 16958478Sobrien { \ 17058478Sobrien if (flag_pic) \ 17158478Sobrien fprintf ((FILE), "*%s@GOT(%%ebx)", _name); \ 17258478Sobrien else \ 17358478Sobrien fprintf ((FILE), "%s", _name); \ 17458478Sobrien } \ 17558478Sobrien else \ 176107286Sobrien fprintf (FILE, "%s", _name); \ 17758478Sobrien} while (0) 17858478Sobrien 17956810Sobrien/* This is how to hack on the symbol code of certain relcalcitrant 18056810Sobrien symbols to modify their output in output_pic_addr_const (). */ 18156810Sobrien 18295810Sobrien#undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */ 18356810Sobrien 18458478Sobrien#undef ASM_OUTPUT_ALIGN 18552112Sobrien#define ASM_OUTPUT_ALIGN(FILE, LOG) \ 18697907Sobrien do { \ 18797907Sobrien if ((LOG)!=0) { \ 18897907Sobrien if (in_text_section()) \ 18997907Sobrien fprintf ((FILE), "\t.p2align %d,0x90\n", (LOG)); \ 19097907Sobrien else \ 19197907Sobrien fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 19297907Sobrien } \ 19396466Sobrien } while (0) 19418349Speter 19595810Sobrien/* A C statement to output to the stdio stream FILE an assembler 19695810Sobrien command to advance the location counter to a multiple of 1<<LOG 19795810Sobrien bytes if it is within MAX_SKIP bytes. 19851408Sobrien 19995810Sobrien This is used to align code labels according to Intel recommendations. */ 20051408Sobrien 20196447Sobrien/* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE, 20296447Sobrien but it is easier to fix in an MD way. */ 20396447Sobrien 20495810Sobrien#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 20596447Sobrien#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 20696466Sobrien do { \ 20797910Sobrien if ((LOG) != 0) { \ 208107286Sobrien if ((MAX_SKIP) == 0) \ 20997910Sobrien fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 21097910Sobrien else \ 21197910Sobrien fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 21297910Sobrien } \ 21396466Sobrien } while (0) 21495810Sobrien#endif 21558478Sobrien 216113420Skan/* If defined, a C expression whose value is a string containing the 217113420Skan assembler operation to identify the following data as 218113420Skan uninitialized global data. If not defined, and neither 219113420Skan `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 220113420Skan uninitialized global data will be output in the data section if 221113420Skan `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 222113420Skan used. */ 223113420Skan#undef BSS_SECTION_ASM_OP 224113420Skan#define BSS_SECTION_ASM_OP "\t.section\t.bss" 22573305Sobrien 226113420Skan/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 227113420Skan separate, explicit argument. If you define this macro, it is used 228113420Skan in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 229113420Skan handling the required alignment of the variable. The alignment is 230113420Skan specified as the number of bits. 231113420Skan 232113420Skan Try to use function `asm_output_aligned_bss' defined in file 233113420Skan `varasm.c' when defining this macro. */ 234113420Skan#undef ASM_OUTPUT_ALIGNED_BSS 235113420Skan#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 236113420Skan asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 237113420Skan 23858478Sobrien/************************[ Debugger stuff ]*********************************/ 23918334Speter 24034229Speter#undef DBX_REGISTER_NUMBER 24195810Sobrien#define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \ 24295810Sobrien : (write_symbols == DWARF2_DEBUG \ 24393263Sobrien || write_symbols == DWARF_DEBUG) \ 24495810Sobrien ? svr4_dbx_register_map[(n)] \ 24595810Sobrien : dbx_register_map[(n)]) 24634229Speter 24799884Sobrien/* The same functions are used to creating the DWARF2 debug info and C++ 24899884Sobrien unwind info (except.c). Regardless of the debug format requested, the 24999884Sobrien register numbers used in exception unwinding sections still have to be 25099884Sobrien DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER 25199884Sobrien macro to mean too much. */ 25299884Sobrien#define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \ 25399884Sobrien : svr4_dbx_register_map[(n)]) 25499884Sobrien 25558478Sobrien/* stabs-in-elf has offsets relative to function beginning */ 25658478Sobrien#undef DBX_OUTPUT_LBRAC 25758478Sobrien#define DBX_OUTPUT_LBRAC(FILE, NAME) \ 25858478Sobrien do { \ 25958478Sobrien fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \ 26058478Sobrien assemble_name (asmfile, buf); \ 26158478Sobrien fputc ('-', asmfile); \ 26258478Sobrien assemble_name (asmfile, \ 26358478Sobrien XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 26458478Sobrien fprintf (asmfile, "\n"); \ 26558478Sobrien } while (0) 26652112Sobrien 26758478Sobrien#undef DBX_OUTPUT_RBRAC 26858478Sobrien#define DBX_OUTPUT_RBRAC(FILE, NAME) \ 26958478Sobrien do { \ 27058478Sobrien fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \ 27158478Sobrien assemble_name (asmfile, buf); \ 27258478Sobrien fputc ('-', asmfile); \ 27358478Sobrien assemble_name (asmfile, \ 27458478Sobrien XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 27558478Sobrien fprintf (asmfile, "\n"); \ 27658478Sobrien } while (0) 277