i386_elf.h revision 1b8adde7ba7d5e04395c141c5400dc2cffd7d809
#ifndef I386_BITS_ELF_H
#define I386_BITS_ELF_H
#include "cpu.h"
#ifdef CONFIG_X86_64
/* ELF Defines for the 64bit version of the current architecture */
#define EM_CURRENT_64 EM_X86_64
#define EM_CURRENT_64_PRESENT ( \
CPU_FEATURE_P(cpu_info.x86_capability, LM) && \
CPU_FEATURE_P(cpu_info.x86_capability, PAE) && \
CPU_FEATURE_P(cpu_info.x86_capability, PSE))
#define ELF_CHECK_X86_64_ARCH(x) \
(EM_CURRENT_64_PRESENT && ((x).e_machine == EM_X86_64))
#define __unused_i386
#else
#define ELF_CHECK_X86_64_ARCH(x) 0
#define __unused_i386 __unused
#endif
/* ELF Defines for the current architecture */
#define EM_CURRENT EM_386
#define ELFDATA_CURRENT ELFDATA2LSB
#define ELF_CHECK_I386_ARCH(x) \
(((x).e_machine == EM_386) || ((x).e_machine == EM_486))
#define ELF_CHECK_ARCH(x) \
((ELF_CHECK_I386_ARCH(x) || ELF_CHECK_X86_64_ARCH(x)) && \
((x).e_entry <= 0xffffffffUL))
#ifdef IMAGE_FREEBSD
/*
* FreeBSD has this rather strange "feature" of its design.
* At some point in its evolution, FreeBSD started to rely
* externally on private/static/debug internal symbol information.
* That is, some of the interfaces that software uses to access
* and work with the FreeBSD kernel are made available not
* via the shared library symbol information (the .DYNAMIC section)
* but rather the debug symbols. This means that any symbol, not
* just publicly defined symbols can be (and are) used by system
* tools to make the system work. (such as top, swapinfo, swapon,
* etc)
*
* Even worse, however, is the fact that standard ELF loaders do
* not know how to load the symbols since they are not within
* an ELF PT_LOAD section. The kernel needs these symbols to
* operate so the following changes/additions to the boot
* loading of EtherBoot have been made to get the kernel to load.
* All of the changes are within IMAGE_FREEBSD such that the
* extra/changed code only compiles when FREEBSD support is
* enabled.
*/
/*
* Section header for FreeBSD (debug symbol kludge!) support
*/
typedef struct {
Elf32_Word sh_name; /* Section name (index into the
section header string table). */
Elf32_Word sh_type; /* Section type. */
Elf32_Word sh_flags; /* Section flags. */
Elf32_Addr sh_addr; /* Address in memory image. */
Elf32_Off sh_offset; /* Offset in file. */
Elf32_Size sh_size; /* Size in bytes. */
Elf32_Word sh_link; /* Index of a related section. */
Elf32_Word sh_info; /* Depends on section type. */
Elf32_Size sh_addralign; /* Alignment in bytes. */
Elf32_Size sh_entsize; /* Size of each entry in section. */
} Elf32_Shdr;
/* sh_type */
#define SHT_SYMTAB 2 /* symbol table section */
#define SHT_STRTAB 3 /* string table section */
/*
* Module information subtypes (for the metadata that we need to build)
*/
#define MODINFO_END 0x0000 /* End of list */
#define MODINFO_NAME 0x0001 /* Name of module (string) */
#define MODINFO_TYPE 0x0002 /* Type of module (string) */
#define MODINFO_METADATA 0x8000 /* Module-specfic */
#define MODINFOMD_SSYM 0x0003 /* start of symbols */
#define MODINFOMD_ESYM 0x0004 /* end of symbols */
#endif /* IMAGE_FREEBSD */
#endif /* I386_BITS_ELF_H */