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3c3bdf30 NC |
1 | TEMPLATE_NAME=elf32 |
2 | GENERATE_SHLIB_SCRIPT=yes | |
3 | ELFSIZE=64 | |
4 | SCRIPT_NAME=elf | |
5 | OUTPUT_FORMAT="elf64-mmix" | |
6 | ENTRY=_start. | |
7 | ||
8 | # Default to 0 as mmixal does. | |
9 | TEXT_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. | |
12 | TEXT_BASE_ADDRESS=$TEXT_START_ADDR | |
13 | DATA_ADDR='DEFINED (__.MMIX.start..data) ? __.MMIX.start..data : 0x2000000000000000' | |
14 | ||
15 | # Setting this anywhere near the quite reasonable value of 0x10000 | |
16 | # causes the binary to bloat to reach page alignment between segments. | |
17 | # Let's just have a 256-byte default page alignment. Having some | |
18 | # alignment at all gives a warm feeling but not much more. | |
19 | MAXPAGESIZE=256 | |
20 | ARCH=mmix | |
21 | MACHINE= | |
22 | COMPILE_IN=yes | |
23 | EXTRA_EM_FILE=mmixelf | |
24 | ||
25 | # The existence of a symbol __start (or _start) should overrule Main, so | |
26 | # it can be a user symbol without the associated mmixal magic. We | |
27 | # also want to provide Main as a synonym for _start, if Main wasn't | |
28 | # defined but is referred to, and _start was defined. | |
29 | # | |
30 | # The reason we use a symbol "_start." as a mediator is to avoid | |
31 | # causing ld to force the type of _start to object rather than no | |
32 | # type, which confuses disassembly; we also make it alphanumerically | |
33 | # a successor of _start for similar reasons. Perhaps it's a linker | |
34 | # bug that linker-defined symbols set the symbol-type. | |
35 | # | |
36 | # Note that we smuggle this into OTHER_TEXT_SECTIONS (at the end | |
37 | # of .text) rather than TEXT_START_SYMBOLS. This is necessary, as | |
38 | # DEFINED wouldn't find the symbol if it was at the top; presumably | |
39 | # before the definition, if the definition is not in the first file. | |
40 | # FIXME: Arguably a linker bug. | |
41 | OTHER_TEXT_SECTIONS=' | |
42 | _start. = (DEFINED (_start) ? _start | |
43 | : (DEFINED (Main) ? Main : (DEFINED (.text) ? .text : 0))); | |
44 | PROVIDE (Main = DEFINED (Main) ? Main : (DEFINED (_start) ? _start : _start.)); | |
45 | ' | |
46 | ||
48fa4a5d | 47 | OTHER_SECTIONS=' |
3c3bdf30 NC |
48 | .MMIX.reg_contents : |
49 | { | |
50 | /* Note that this section always has a fixed VMA - that of its | |
51 | first register * 8. */ | |
48fa4a5d | 52 | *(.MMIX.reg_contents.linker_allocated); |
3c3bdf30 NC |
53 | *(.MMIX.reg_contents); |
54 | } | |
48fa4a5d | 55 | ' |
3c3bdf30 NC |
56 | |
57 | # FIXME: Also bit by the PROVIDE bug? If not, this could be | |
58 | # EXECUTABLE_SYMBOLS. | |
59 | # By default, put the high end of the stack where the register stack | |
60 | # begins. They grow in opposite directions. */ | |
465bc359 | 61 | OTHER_END_SYMBOLS="PROVIDE (__Stack_start = 0x6000000000000000);" |