1 /* 2 * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> 3 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> 4 * The Silver Hammer Group, Ltd. 5 * 6 * This file provides the definitions and structures needed to 7 * support uClinux flat-format executables. 8 */ 9 10 #ifndef _UAPI_LINUX_FLAT_H 11 #define _UAPI_LINUX_FLAT_H 12 13 14 #define FLAT_VERSION 0x00000004L 15 16 #ifdef CONFIG_BINFMT_SHARED_FLAT 17 #define MAX_SHARED_LIBS (4) 18 #else 19 #define MAX_SHARED_LIBS (1) 20 #endif 21 22 /* 23 * To make everything easier to port and manage cross platform 24 * development, all fields are in network byte order. 25 */ 26 27 struct flat_hdr { 28 char magic[4]; 29 unsigned long rev; /* version (as above) */ 30 unsigned long entry; /* Offset of first executable instruction 31 with text segment from beginning of file */ 32 unsigned long data_start; /* Offset of data segment from beginning of 33 file */ 34 unsigned long data_end; /* Offset of end of data segment 35 from beginning of file */ 36 unsigned long bss_end; /* Offset of end of bss segment from beginning 37 of file */ 38 39 /* (It is assumed that data_end through bss_end forms the bss segment.) */ 40 41 unsigned long stack_size; /* Size of stack, in bytes */ 42 unsigned long reloc_start; /* Offset of relocation records from 43 beginning of file */ 44 unsigned long reloc_count; /* Number of relocation records */ 45 unsigned long flags; 46 unsigned long build_date; /* When the program/library was built */ 47 unsigned long filler[5]; /* Reservered, set to zero */ 48 }; 49 50 #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ 51 #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ 52 #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ 53 #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ 54 #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ 55 56 57 58 #endif /* _UAPI_LINUX_FLAT_H */ 59