1 #ifndef I386_BITS_ELF_H 2 #define I386_BITS_ELF_H 3 4 #include "cpu.h" 5 6 #ifdef CONFIG_X86_64 7 /* ELF Defines for the 64bit version of the current architecture */ 8 #define EM_CURRENT_64 EM_X86_64 9 #define EM_CURRENT_64_PRESENT ( \ 10 CPU_FEATURE_P(cpu_info.x86_capability, LM) && \ 11 CPU_FEATURE_P(cpu_info.x86_capability, PAE) && \ 12 CPU_FEATURE_P(cpu_info.x86_capability, PSE)) 13 14 #define ELF_CHECK_X86_64_ARCH(x) \ 15 (EM_CURRENT_64_PRESENT && ((x).e_machine == EM_X86_64)) 16 #define __unused_i386 17 #else 18 #define ELF_CHECK_X86_64_ARCH(x) 0 19 #define __unused_i386 __unused 20 #endif 21 22 23 /* ELF Defines for the current architecture */ 24 #define EM_CURRENT EM_386 25 #define ELFDATA_CURRENT ELFDATA2LSB 26 27 #define ELF_CHECK_I386_ARCH(x) \ 28 (((x).e_machine == EM_386) || ((x).e_machine == EM_486)) 29 30 #define ELF_CHECK_ARCH(x) \ 31 ((ELF_CHECK_I386_ARCH(x) || ELF_CHECK_X86_64_ARCH(x)) && \ 32 ((x).e_entry <= 0xffffffffUL)) 33 34 #ifdef IMAGE_FREEBSD 35 /* 36 * FreeBSD has this rather strange "feature" of its design. 37 * At some point in its evolution, FreeBSD started to rely 38 * externally on private/static/debug internal symbol information. 39 * That is, some of the interfaces that software uses to access 40 * and work with the FreeBSD kernel are made available not 41 * via the shared library symbol information (the .DYNAMIC section) 42 * but rather the debug symbols. This means that any symbol, not 43 * just publicly defined symbols can be (and are) used by system 44 * tools to make the system work. (such as top, swapinfo, swapon, 45 * etc) 46 * 47 * Even worse, however, is the fact that standard ELF loaders do 48 * not know how to load the symbols since they are not within 49 * an ELF PT_LOAD section. The kernel needs these symbols to 50 * operate so the following changes/additions to the boot 51 * loading of EtherBoot have been made to get the kernel to load. 52 * All of the changes are within IMAGE_FREEBSD such that the 53 * extra/changed code only compiles when FREEBSD support is 54 * enabled. 55 */ 56 57 /* 58 * Section header for FreeBSD (debug symbol kludge!) support 59 */ 60 typedef struct { 61 Elf32_Word sh_name; /* Section name (index into the 62 section header string table). */ 63 Elf32_Word sh_type; /* Section type. */ 64 Elf32_Word sh_flags; /* Section flags. */ 65 Elf32_Addr sh_addr; /* Address in memory image. */ 66 Elf32_Off sh_offset; /* Offset in file. */ 67 Elf32_Size sh_size; /* Size in bytes. */ 68 Elf32_Word sh_link; /* Index of a related section. */ 69 Elf32_Word sh_info; /* Depends on section type. */ 70 Elf32_Size sh_addralign; /* Alignment in bytes. */ 71 Elf32_Size sh_entsize; /* Size of each entry in section. */ 72 } Elf32_Shdr; 73 74 /* sh_type */ 75 #define SHT_SYMTAB 2 /* symbol table section */ 76 #define SHT_STRTAB 3 /* string table section */ 77 78 /* 79 * Module information subtypes (for the metadata that we need to build) 80 */ 81 #define MODINFO_END 0x0000 /* End of list */ 82 #define MODINFO_NAME 0x0001 /* Name of module (string) */ 83 #define MODINFO_TYPE 0x0002 /* Type of module (string) */ 84 #define MODINFO_METADATA 0x8000 /* Module-specfic */ 85 86 #define MODINFOMD_SSYM 0x0003 /* start of symbols */ 87 #define MODINFOMD_ESYM 0x0004 /* end of symbols */ 88 89 #endif /* IMAGE_FREEBSD */ 90 91 #endif /* I386_BITS_ELF_H */ 92