diff options
Diffstat (limited to 'linux-user/flat.h')
| -rw-r--r-- | linux-user/flat.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/linux-user/flat.h b/linux-user/flat.h new file mode 100644 index 0000000000..b057b140e9 --- /dev/null +++ b/linux-user/flat.h @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2002-2003 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. + */ + +#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]; + unsigned long rev; /* version (as above) */ + unsigned long entry; /* Offset of first executable instruction + with text segment from beginning of file */ + unsigned long data_start; /* Offset of data segment from beginning of + file */ + unsigned long data_end; /* Offset of end of data segment + from beginning of file */ + unsigned long 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.) */ + + unsigned long stack_size; /* Size of stack, in bytes */ + unsigned long reloc_start; /* Offset of relocation records from + beginning of file */ + unsigned long reloc_count; /* Number of relocation records */ + unsigned long flags; + unsigned long build_date; /* When the program/library was built */ + unsigned long 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 */ + + +/* + * 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. + */ + +#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 + +# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |