| /* Definitions for MIPS running Linux-based GNU systems with ELF format. |
| Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
| Free Software Foundation, Inc. |
| |
| 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 2, 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 COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #undef WCHAR_TYPE |
| #define WCHAR_TYPE "int" |
| |
| #undef WCHAR_TYPE_SIZE |
| #define WCHAR_TYPE_SIZE 32 |
| |
| /* If defined, a C expression whose value is a string containing the |
| assembler operation to identify the following data as |
| uninitialized global data. If not defined, and neither |
| `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, |
| uninitialized global data will be output in the data section if |
| `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be |
| used. */ |
| #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
| |
| #define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss |
| |
| #undef ASM_DECLARE_OBJECT_NAME |
| #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name |
| |
| #undef TARGET_VERSION |
| #if TARGET_ENDIAN_DEFAULT == 0 |
| #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)"); |
| #else |
| #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)"); |
| #endif |
| |
| #undef MD_EXEC_PREFIX |
| #undef MD_STARTFILE_PREFIX |
| |
| /* If we don't set MASK_ABICALLS, we can't default to PIC. */ |
| #undef TARGET_DEFAULT |
| #define TARGET_DEFAULT (MASK_ABICALLS|MASK_GAS) |
| |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do { \ |
| LINUX_TARGET_OS_CPP_BUILTINS(); \ |
| builtin_define ("__PIC__"); \ |
| builtin_define ("__pic__"); \ |
| builtin_assert ("machine=mips"); \ |
| /* The GNU C++ standard library requires this. */ \ |
| if (c_dialect_cxx ()) \ |
| builtin_define ("_GNU_SOURCE"); \ |
| \ |
| if (mips_abi == ABI_N32) \ |
| { \ |
| builtin_define ("_ABIN32=2"); \ |
| builtin_define ("_MIPS_SIM=_ABIN32"); \ |
| builtin_define ("_MIPS_SZLONG=32"); \ |
| builtin_define ("_MIPS_SZPTR=32"); \ |
| } \ |
| else if (mips_abi == ABI_64) \ |
| { \ |
| builtin_define ("_ABI64=3"); \ |
| builtin_define ("_MIPS_SIM=_ABI64"); \ |
| builtin_define ("_MIPS_SZLONG=64"); \ |
| builtin_define ("_MIPS_SZPTR=64"); \ |
| } \ |
| else \ |
| { \ |
| builtin_define ("_ABIO32=1"); \ |
| builtin_define ("_MIPS_SIM=_ABIO32"); \ |
| builtin_define ("_MIPS_SZLONG=32"); \ |
| builtin_define ("_MIPS_SZPTR=32"); \ |
| } \ |
| if (TARGET_FLOAT64) \ |
| builtin_define ("_MIPS_FPSET=32"); \ |
| else \ |
| builtin_define ("_MIPS_FPSET=16"); \ |
| \ |
| if (TARGET_INT64) \ |
| builtin_define ("_MIPS_SZINT=64"); \ |
| else \ |
| builtin_define ("_MIPS_SZINT=32"); \ |
| } while (0) |
| |
| #undef SUBTARGET_CPP_SPEC |
| #define SUBTARGET_CPP_SPEC "\ |
| %{fno-PIC:-U__PIC__ -U__pic__} %{fno-pic:-U__PIC__ -U__pic__} \ |
| %{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} \ |
| %{pthread:-D_REENTRANT}" |
| |
| /* From iris5.h */ |
| /* -G is incompatible with -KPIC which is the default, so only allow objects |
| in the small data section if the user explicitly asks for it. */ |
| #undef MIPS_DEFAULT_GVALUE |
| #define MIPS_DEFAULT_GVALUE 0 |
| |
| /* Borrowed from sparc/linux.h */ |
| #undef LINK_SPEC |
| #define LINK_SPEC \ |
| "%(endian_spec) \ |
| %{shared:-shared} \ |
| %{!shared: \ |
| %{!ibcs: \ |
| %{!static: \ |
| %{rdynamic:-export-dynamic} \ |
| %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \ |
| %{static:-static}}}" |
| |
| #undef SUBTARGET_ASM_SPEC |
| #define SUBTARGET_ASM_SPEC "\ |
| %{mabi=64: -64} \ |
| %{!fno-PIC:%{!fno-pic:-KPIC}} \ |
| %{fno-PIC:-non_shared} %{fno-pic:-non_shared}" |
| |
| /* The MIPS assembler has different syntax for .set. We set it to |
| .dummy to trap any errors. */ |
| #undef SET_ASM_OP |
| #define SET_ASM_OP "\t.dummy\t" |
| |
| #undef ASM_OUTPUT_DEF |
| #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ |
| do { \ |
| fputc ( '\t', FILE); \ |
| assemble_name (FILE, LABEL1); \ |
| fputs ( " = ", FILE); \ |
| assemble_name (FILE, LABEL2); \ |
| fputc ( '\n', FILE); \ |
| } while (0) |
| |
| #undef ASM_DECLARE_FUNCTION_NAME |
| #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \ |
| do { \ |
| if (!flag_inhibit_size_directive) \ |
| { \ |
| fputs ("\t.ent\t", STREAM); \ |
| assemble_name (STREAM, NAME); \ |
| putc ('\n', STREAM); \ |
| } \ |
| ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function"); \ |
| assemble_name (STREAM, NAME); \ |
| fputs (":\n", STREAM); \ |
| } while (0) |
| |
| #undef ASM_DECLARE_FUNCTION_SIZE |
| #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \ |
| do { \ |
| if (!flag_inhibit_size_directive) \ |
| { \ |
| fputs ("\t.end\t", STREAM); \ |
| assemble_name (STREAM, NAME); \ |
| putc ('\n', STREAM); \ |
| } \ |
| } while (0) |
| |
| /* Tell function_prologue in mips.c that we have already output the .ent/.end |
| pseudo-ops. */ |
| #undef FUNCTION_NAME_ALREADY_DECLARED |
| #define FUNCTION_NAME_ALREADY_DECLARED 1 |
| |
| /* The glibc _mcount stub will save $v0 for us. Don't mess with saving |
| it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the |
| presence of $gp-relative calls. */ |
| #undef ASM_OUTPUT_REG_PUSH |
| #undef ASM_OUTPUT_REG_POP |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC "\ |
| %{shared: -lc} \ |
| %{!static:-rpath-link %R/lib:%R/usr/lib} \ |
| %{!shared: %{pthread:-lpthread} \ |
| %{profile:-lc_p} %{!profile: -lc}}" |
| |
| #ifndef inhibit_libc |
| /* Do code reading to identify a signal frame, and set the frame |
| state data appropriately. See unwind-dw2.c for the structs. */ |
| #ifdef IN_LIBGCC2 |
| #include <signal.h> |
| |
| /* The third parameter to the signal handler points to something with |
| * this structure defined in asm/ucontext.h, but the name clashes with |
| * struct ucontext from sys/ucontext.h so this private copy is used. */ |
| typedef struct _sig_ucontext { |
| unsigned long uc_flags; |
| struct _sig_ucontext *uc_link; |
| stack_t uc_stack; |
| struct sigcontext uc_mcontext; |
| sigset_t uc_sigmask; |
| } _sig_ucontext_t; |
| |
| #endif /* IN_LIBGCC2 */ |
| |
| #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ |
| do { \ |
| u_int32_t *pc_ = (u_int32_t *) (CONTEXT)->ra; \ |
| struct sigcontext *sc_; \ |
| _Unwind_Ptr new_cfa_; \ |
| int i_; \ |
| \ |
| /* 24021061 li v0, 0x1061 (rt_sigreturn)*/ \ |
| /* 0000000c syscall */ \ |
| /* or */ \ |
| /* 24021017 li v0, 0x1017 (sigreturn) */ \ |
| /* 0000000c syscall */ \ |
| if (*(pc_ + 1) != 0x0000000c) \ |
| break; \ |
| if (*(pc_ + 0) == 0x24021017) \ |
| { \ |
| struct sigframe { \ |
| u_int32_t trampoline[2]; \ |
| struct sigcontext sigctx; \ |
| } *rt_ = (CONTEXT)->ra; \ |
| sc_ = &rt_->sigctx; \ |
| } \ |
| else if (*(pc_ + 0) == 0x24021061) \ |
| { \ |
| struct rt_sigframe { \ |
| u_int32_t trampoline[2]; \ |
| struct siginfo info; \ |
| _sig_ucontext_t uc; \ |
| } *rt_ = (CONTEXT)->ra; \ |
| sc_ = &rt_->uc.uc_mcontext; \ |
| } \ |
| else \ |
| break; \ |
| \ |
| new_cfa_ = (_Unwind_Ptr)sc_; \ |
| (FS)->cfa_how = CFA_REG_OFFSET; \ |
| (FS)->cfa_reg = STACK_POINTER_REGNUM; \ |
| (FS)->cfa_offset = new_cfa_ - (_Unwind_Ptr) (CONTEXT)->cfa; \ |
| \ |
| for (i_ = 0; i_ < 32; i_++) { \ |
| (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ |
| (FS)->regs.reg[i_].loc.offset \ |
| = (_Unwind_Ptr)&(sc_->sc_regs[i_]) - new_cfa_; \ |
| } \ |
| (FS)->regs.reg[SIGNAL_UNWIND_RETURN_COLUMN].how = REG_SAVED_OFFSET; \ |
| (FS)->regs.reg[SIGNAL_UNWIND_RETURN_COLUMN].loc.offset \ |
| = (_Unwind_Ptr)&(sc_->sc_pc) - new_cfa_; \ |
| (FS)->retaddr_column = SIGNAL_UNWIND_RETURN_COLUMN; \ |
| \ |
| goto SUCCESS; \ |
| } while (0) |
| #endif |
