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1 /* |
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2 * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> |
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3 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> |
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4 * The Silver Hammer Group, Ltd. |
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5 * |
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6 * This file provides the definitions and structures needed to |
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7 * support uClinux flat-format executables. |
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8 */ |
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9 |
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10 #define FLAT_VERSION 0x00000004L |
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11 |
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12 #ifdef CONFIG_BINFMT_SHARED_FLAT |
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13 #define MAX_SHARED_LIBS (4) |
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14 #else |
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15 #define MAX_SHARED_LIBS (1) |
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16 #endif |
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17 |
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18 /* |
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19 * To make everything easier to port and manage cross platform |
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20 * development, all fields are in network byte order. |
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21 */ |
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22 |
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23 struct flat_hdr { |
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24 char magic[4]; |
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25 abi_ulong rev; /* version (as above) */ |
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26 abi_ulong entry; /* Offset of first executable instruction |
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27 with text segment from beginning of file */ |
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28 abi_ulong data_start; /* Offset of data segment from beginning of |
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29 file */ |
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30 abi_ulong data_end; /* Offset of end of data segment |
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31 from beginning of file */ |
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32 abi_ulong bss_end; /* Offset of end of bss segment from beginning |
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33 of file */ |
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34 |
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35 /* (It is assumed that data_end through bss_end forms the bss segment.) */ |
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36 |
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37 abi_ulong stack_size; /* Size of stack, in bytes */ |
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38 abi_ulong reloc_start; /* Offset of relocation records from |
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39 beginning of file */ |
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40 abi_ulong reloc_count; /* Number of relocation records */ |
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41 abi_ulong flags; |
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42 abi_ulong build_date; /* When the program/library was built */ |
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43 abi_ulong filler[5]; /* Reservered, set to zero */ |
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44 }; |
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45 |
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46 #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
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47 #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
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48 #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
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49 #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
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50 #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
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51 |
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52 |
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53 /* |
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54 * While it would be nice to keep this header clean, users of older |
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55 * tools still need this support in the kernel. So this section is |
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56 * purely for compatibility with old tool chains. |
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57 * |
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58 * DO NOT make changes or enhancements to the old format please, just work |
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59 * with the format above, except to fix bugs with old format support. |
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60 */ |
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61 |
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62 #define OLD_FLAT_VERSION 0x00000002L |
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63 #define OLD_FLAT_RELOC_TYPE_TEXT 0 |
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64 #define OLD_FLAT_RELOC_TYPE_DATA 1 |
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65 #define OLD_FLAT_RELOC_TYPE_BSS 2 |
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66 |
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67 # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |