1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> 4 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> 5 * The Silver Hammer Group, Ltd. 6 * 7 * This file provides the definitions and structures needed to 8 * support uClinux flat-format executables. 9 */ 10 11 #ifndef _UAPI_LINUX_FLAT_H 12 #define _UAPI_LINUX_FLAT_H 13 14 15 #define FLAT_VERSION 0x00000004L 16 17 #ifdef CONFIG_BINFMT_SHARED_FLAT 18 #define MAX_SHARED_LIBS (4) 19 #else 20 #define MAX_SHARED_LIBS (1) 21 #endif 22 23 /* 24 * To make everything easier to port and manage cross platform 25 * development, all fields are in network byte order. 26 */ 27 28 struct flat_hdr { 29 char magic[4]; 30 unsigned long rev; /* version (as above) */ 31 unsigned long entry; /* Offset of first executable instruction 32 with text segment from beginning of file */ 33 unsigned long data_start; /* Offset of data segment from beginning of 34 file */ 35 unsigned long data_end; /* Offset of end of data segment 36 from beginning of file */ 37 unsigned long bss_end; /* Offset of end of bss segment from beginning 38 of file */ 39 40 /* (It is assumed that data_end through bss_end forms the bss segment.) */ 41 42 unsigned long stack_size; /* Size of stack, in bytes */ 43 unsigned long reloc_start; /* Offset of relocation records from 44 beginning of file */ 45 unsigned long reloc_count; /* Number of relocation records */ 46 unsigned long flags; 47 unsigned long build_date; /* When the program/library was built */ 48 unsigned long filler[5]; /* Reservered, set to zero */ 49 }; 50 51 #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ 52 #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ 53 #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ 54 #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ 55 #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ 56 57 58 59 #endif /* _UAPI_LINUX_FLAT_H */ 60