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Diffstat (limited to 'package/elf2flt/src/flat.h')
| -rw-r--r-- | package/elf2flt/src/flat.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/package/elf2flt/src/flat.h b/package/elf2flt/src/flat.h new file mode 100644 index 000000000..3cc502d7c --- /dev/null +++ b/package/elf2flt/src/flat.h @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2002-2005 David McCullough <davidm@snapgear.com> + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * The Silver Hammer Group, Ltd. + * + * This file provides the definitions and structures needed to + * support uClinux flat-format executables. + * + * This is Free Software, under the GNU Public Licence v2 or greater. + * + */ + +#ifndef _LINUX_FLAT_H +#define _LINUX_FLAT_H + +#ifdef __KERNEL__ +#include <linux/types.h> +#include <asm/flat.h> +#endif + +#define FLAT_VERSION 0x00000004L + +#ifdef CONFIG_BINFMT_SHARED_FLAT +#define MAX_SHARED_LIBS (4) +#else +#define MAX_SHARED_LIBS (1) +#endif + +/* + * To make everything easier to port and manage cross platform + * development, all fields are in network byte order. + */ + +struct flat_hdr { + char magic[4]; + uint32_t rev; /* version (as above) */ + uint32_t entry; /* Offset of first executable instruction + with text segment from beginning of file */ + uint32_t data_start; /* Offset of data segment from beginning of + file */ + uint32_t data_end; /* Offset of end of data segment from beginning + of file */ + uint32_t bss_end; /* Offset of end of bss segment from beginning + of file */ + + /* (It is assumed that data_end through bss_end forms the bss segment.) */ + + uint32_t stack_size; /* Size of stack, in bytes */ + uint32_t reloc_start; /* Offset of relocation records from beginning + of file */ + uint32_t reloc_count; /* Number of relocation records */ + uint32_t flags; + uint32_t build_date; /* When the program/library was built */ + uint32_t filler[5]; /* Reservered, set to zero */ +}; + +#define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ +#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ +#define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ +#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ +#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ + +#ifdef __KERNEL__ /* so systems without linux headers can compile the apps */ +/* + * While it would be nice to keep this header clean, users of older + * tools still need this support in the kernel. So this section is + * purely for compatibility with old tool chains. + * + * DO NOT make changes or enhancements to the old format please, just work + * with the format above, except to fix bugs with old format support. + */ + +#include <asm/byteorder.h> + +#define OLD_FLAT_VERSION 0x00000002L +#define OLD_FLAT_RELOC_TYPE_TEXT 0 +#define OLD_FLAT_RELOC_TYPE_DATA 1 +#define OLD_FLAT_RELOC_TYPE_BSS 2 + +typedef union { + uint32_t value; + struct { +# if defined(mc68000) && !defined(CONFIG_COLDFIRE) + int32_t offset : 30; + uint32_t type : 2; +# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ +# elif defined(__BIG_ENDIAN_BITFIELD) + uint32_t type : 2; + int32_t offset : 30; +# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ +# elif defined(__LITTLE_ENDIAN_BITFIELD) + int32_t offset : 30; + uint32_t type : 2; +# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ +# else +# error "Unknown bitfield order for flat files." +# endif + } reloc; +} flat_v2_reloc_t; + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_FLAT_H */ + +/* this __MUST__ be at the VERY end of the file - do NOT move!! + * Local Variables: + * c-basic-offset: 4 + * tab-width: 8 + * end: + * vi: tabstop=8 shiftwidth=4 textwidth=79 noexpandtab + */ |