Created
March 13, 2011 19:08
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REBOL [ | |
Title: "Red/System ELF format emitter" | |
Author: "Nenad Rakocevic" | |
File: %ELF.r | |
Rights: "Copyright (C) 2011 Nenad Rakocevic. All rights reserved." | |
License: "BSD-3 - https://github.com/dockimbel/Red/blob/master/BSD-3-License.txt" | |
] | |
context [ | |
defs: [ | |
extensions [ | |
exe %"" | |
obj %.o | |
lib %.a | |
dll %.so | |
] | |
class [ | |
none 0 | |
c-32-bit 1 | |
c-64-bit 2 | |
] | |
encoding [ | |
none 0 | |
LSB 1 ;-- little endian data encoding | |
MSB 2 ;-- big endian data encoding | |
] | |
file-type [ | |
none 0 ;-- no file type | |
relocatable 1 ;-- relocatable file | |
executable 2 ;-- executable file | |
shared 3 ;-- shared object file | |
core 4 ;-- core file | |
lo-proc #{FF00} ;-- processor-specific | |
hi-proc #{FFFF} ;-- processor-specific | |
] | |
machine [ | |
none 0 ;-- no machine | |
m32 1 ;-- AT&T WE 32100 | |
sparc 2 ;-- SPARC | |
i386 3 ;-- Intel 80386 | |
m68k 4 ;-- Motorola 68000 | |
m88k 5 ;-- Motorola 88000 | |
i860 7 ;-- Intel 80860 | |
mips 8 ;-- MIPS RS3000 | |
] | |
s-type [ | |
null 0 ;-- mark inactive section header | |
prog-bits 1 ;-- flags | |
sym-tab 2 ;-- symbol table (for link editing) | |
str-tab 3 ;-- string table | |
rela 4 ;-- relocations with addends | |
hash 5 ;-- symbol hash table | |
dynamic 6 ;-- dynamic linking | |
note 7 ;-- notes/comments | |
no-bits 8 ;-- ?? | |
rel 9 ;-- relocations without addends | |
shlib 10 ;-- reserved (unused) | |
dyn-sym 11 ;-- symbol table (dynamic linking) | |
lo-proc #{70000000} ;-- reserved (proc-specific) | |
hi-proc #{7FFFFFFF} ;-- reserved (proc-specific) | |
lo-user #{80000000} ;-- reserved (lower bound reserved indexes) | |
hi-user #{8FFFFFFF} ;-- reserved (upper bound reserved indexes) | |
] | |
s-flags [ | |
write 1 ;-- writable data | |
alloc 2 ;-- requires memory during program execution | |
exec 4 ;-- executable code | |
mask-proc #{F0000000} ;-- proc-specific semantics | |
] | |
] | |
memory-align: 4096 ;-- system page size | |
;file-align: 512 ;-- better keep it < memory-align | |
section-header-32: make struct! [ | |
sh_name [integer!] | |
sh_type [integer!] | |
sh_flags [integer!] | |
sh_addr [integer!] | |
sh_offset [integer!] | |
sh_size [integer!] | |
sh_link [integer!] | |
sh_info [integer!] | |
sh_addralign [integer!] | |
sh_entsize [integer!] | |
] none | |
header-32: make struct! [ | |
ei_mag0 [char] ;-- ma0-3: magic number | |
ei_mag1 [char] | |
ei_mag3 [char] | |
ei_mag3 [char] | |
ei_class [char] | |
ei_data [char] | |
ei_version [char] | |
ei_pad1 [char] | |
ei_pad2 [decimal!] ;-- 8-bytes padding | |
e_type [short] | |
e_machine [short] | |
e_version [integer!] | |
e_entry [integer!] | |
e_phoff [integer!] | |
e_shoff [integer!] | |
e_flags [integer!] | |
e_ehsize [short] | |
e_phentsize [short] | |
e_phnum [short] | |
e_shentsize [short] | |
e_shnum [short] | |
e_shstrndx [short] | |
] none | |
build-section-header: func [job [object!] type specs][ | |
] | |
build-header: func [job [object!]][ | |
fh: make struct! header-32 none | |
fh/ei_mag0: #"^(7F)" | |
fh/ei_mag0: #"E" | |
fh/ei_mag0: #"L" | |
fh/ei_mag0: #"F" | |
fh/e_class: defs/class/c-32-bit | |
fh/e_data: defs/encoding/LSB ;-- TBD: make it target-dependent | |
fh/e_version: 1 ;-- 0: invalid, 1: current | |
fh/machine: defs/machine/i386 | |
;... | |
append job/buffer third fh | |
] | |
build: func [job [object!]][ | |
] | |
] |
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