elf64mmix.sh revision 1.1 
1TEMPLATE_NAME=elf32
2GENERATE_SHLIB_SCRIPT=yes
3ELFSIZE=64
4SCRIPT_NAME=elf
5OUTPUT_FORMAT="elf64-mmix"
6ENTRY=_start.
7
8# Default to 0 as mmixal does.
9TEXT_START_ADDR='DEFINED (__.MMIX.start..text) ? __.MMIX.start..text : 0'
10# Don't add SIZEOF_HEADERS.
11# Don't set EMBEDDED, that would be misleading; it's not that kind of system.
12TEXT_BASE_ADDRESS=$TEXT_START_ADDR
13DATA_ADDR='DEFINED (__.MMIX.start..data) ? __.MMIX.start..data : 0x2000000000000000'
14
15MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
16ARCH=mmix
17MACHINE=
18COMPILE_IN=yes
19EXTRA_EM_FILE=mmixelf
20
21# The existence of a symbol __start (or _start) should overrule Main, so
22# it can be a user symbol without the associated mmixal magic.  We
23# also want to provide Main as a synonym for _start, if Main wasn't
24# defined but is referred to, and _start was defined.
25#
26# The reason we use a symbol "_start." as a mediator is to avoid
27# causing ld to force the type of _start to object rather than no
28# type, which confuses disassembly; we also make it alphanumerically
29# a successor of _start for similar reasons.  Perhaps it's a linker
30# bug that linker-defined symbols set the symbol-type.
31#
32# Note that we smuggle this into OTHER_TEXT_SECTIONS (at the end
33# of .text) rather than TEXT_START_SYMBOLS.  This is necessary, as
34# DEFINED wouldn't find the symbol if it was at the top; presumably
35# before the definition, if the definition is not in the first file.
36# FIXME: Arguably a linker bug.
37OTHER_TEXT_SECTIONS='
38 _start. = (DEFINED (_start) ? _start
39            : (DEFINED (Main) ? Main : (DEFINED (.text) ? .text : 0)));
40 PROVIDE (Main = DEFINED (Main) ? Main : (DEFINED (_start) ? _start : _start.));
41'
42
43OTHER_SECTIONS='
44 .MMIX.reg_contents :
45 {
46   /* Note that this section always has a fixed VMA - that of its
47      first register * 8.  */
48   *(.MMIX.reg_contents.linker_allocated);
49   *(.MMIX.reg_contents);
50 }
51'
52
53# FIXME: Also bit by the PROVIDE bug?  If not, this could be
54# EXECUTABLE_SYMBOLS.
55# By default, put the high end of the stack where the register stack
56# begins.  They grow in opposite directions.  */
57OTHER_SYMBOLS="PROVIDE (__Stack_start = 0x6000000000000000);"
58