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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [services/] [loader/] [v2_0/] [include/] [i386_elf.h] - Rev 610
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#ifndef CYGONCE_LOADER_I386_ELF_H #define CYGONCE_LOADER_I386_ELF_H //========================================================================== // // i386_elf.h // // I386 specific ELF file format support // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos 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. // // eCos 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 eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): nickg // Contributors: nickg // Date: 2000-11-20 // Purpose: Define I386 ELF support // Description: This file contains definitions for configuring the dynamic // loader to deal with the I386 specific parts of the ELF // file format. // // Usage: // #include <cyg/loader/i386_elf.h> // ... // // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/system.h> #include <pkgconf/hal.h> #if defined(CYGPKG_HAL_I386) #ifndef CYG_LOADER_DYNAMIC_LD #include <cyg/infra/cyg_type.h> //-------------------------------------------------------------------------- // Basic definitions #define CYG_ELF_MACHINE EM_386 //-------------------------------------------------------------------------- // Relocation types // Taken from bfd/include/elf/i386.h - not currently sure which of these // are actually used in executables. #define R_386_NONE 0 /* No reloc */ #define R_386_32 1 /* Direct 32 bit */ #define R_386_PC32 2 /* PC relative 32 bit */ #define R_386_GOT32 3 /* 32 bit GOT entry */ #define R_386_PLT32 4 /* 32 bit PLT address */ #define R_386_COPY 5 /* Copy symbol at runtime */ #define R_386_GLOB_DAT 6 /* Create GOT entry */ #define R_386_JUMP_SLOT 7 /* Create PLT entry */ #define R_386_RELATIVE 8 /* Adjust by program base */ #define R_386_GOTOFF 9 /* 32 bit offset to GOT */ #define R_386_GOTPC 10 /* 32 bit PC relative offset to GOT */ #define R_386_16 20 #define R_386_PC16 21 #define R_386_8 22 #define R_386_PC8 23 #define R_386_max 24 /* These are GNU extensions to enable C++ vtable garbage collection. */ #define R_386_GNU_VTINHERIT 250 #define R_386_GNU_VTENTRY 251 //-------------------------------------------------------------------------- // Processor specific customization class for Cyg_LoadObject class. #ifdef __cplusplus class Cyg_LoadObject_Proc : public Cyg_LoadObject_Base { public: inline Cyg_LoadObject_Proc() : Cyg_LoadObject_Base() { }; inline Cyg_LoadObject_Proc( Cyg_LoaderStream& stream, cyg_uint32 mode, Cyg_LoaderMemAlloc *mem ) : Cyg_LoadObject_Base( stream, mode, mem ) { }; inline ~Cyg_LoadObject_Proc() {}; cyg_code apply_rel( unsigned char type, Elf32_Word sym, Elf32_Addr offset ); cyg_code apply_rela( unsigned char type, Elf32_Word sym, Elf32_Addr offset, Elf32_Sword addend ); }; //-------------------------------------------------------------------------- inline cyg_code Cyg_LoadObject_Proc::apply_rel( unsigned char type, Elf32_Word sym, Elf32_Addr offset ) { CYG_ADDRESS addr = (CYG_ADDRESS)(offset + base); CYG_ADDRESS saddr = CYG_LOADER_NULLSYMADDR; switch( type ) { case R_386_32: /* Direct 32 bit */ saddr = get_sym_addr_from_ix(sym); if( saddr == CYG_LOADER_NULLSYMADDR ) return CYG_LOADERR_NO_SYMBOL; *(CYG_WORD32 *)addr += saddr; break; case R_386_PC32: /* PC relative 32 bit */ saddr = get_sym_addr_from_ix(sym); if( saddr == CYG_LOADER_NULLSYMADDR ) return CYG_LOADERR_NO_SYMBOL; *(CYG_WORD32 *)addr += saddr; *(CYG_WORD32 *)addr -= (CYG_WORD32)addr; break; case R_386_GOT32: /* 32 bit GOT entry */ case R_386_PLT32: /* 32 bit PLT address */ case R_386_COPY: /* Copy symbol at runtime */ case R_386_GLOB_DAT: /* Create GOT entry */ case R_386_JUMP_SLOT: /* Create PLT entry */ return CYG_LOADERR_INVALID_RELOC; case R_386_RELATIVE: /* Adjust by program base */ *(CYG_WORD32 *)addr += base; break; case R_386_GOTOFF: /* 32 bit offset to GOT */ case R_386_GOTPC: /* 32 bit PC relative offset to GOT */ case R_386_16: case R_386_PC16: case R_386_8: case R_386_PC8: default: return CYG_LOADERR_INVALID_RELOC; } return 0; } inline cyg_code Cyg_LoadObject_Proc::apply_rela( unsigned char type, Elf32_Word sym, Elf32_Addr offset, Elf32_Sword addend ) { // No RELA relocs in i386 return CYG_LOADERR_INVALID_RELOC; } //-------------------------------------------------------------------------- #endif // __cplusplus #else // CYG_LOADER_DYNAMIC_LD //-------------------------------------------------------------------------- #define CYG_LOADER_DYNAMIC_PREFIX \ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") \ OUTPUT_ARCH("i386") /* Adjust the address for the data segment. We want to adjust up to the same address within the page on the next page up. */ #define CYG_LOADER_DYNAMIC_DATA_ALIGN \ . = ALIGN(0x1000) + (. & (0x1000 - 1)); //-------------------------------------------------------------------------- #endif // CYG_LOADER_DYNAMIC_LD #endif // defined(CYGPKG_HAL_I386) && __cplusplus //-------------------------------------------------------------------------- #endif // ifndef CYGONCE_LOADER_I386_ELF_H // End of i386_elf.h
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