source: trunk/libs/newlib/src/libgloss/sparc/ex931.ld @ 546

Last change on this file since 546 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 4.2 KB
Line 
1/*
2 *uncomment this if you want the linker to output srecords.
3OUTPUT_FORMAT(srec)
4 *
5 */
6ENTRY(_start)
7STARTUP(crt0.o)
8OUTPUT_ARCH(sparc)
9SEARCH_DIR(.)
10__DYNAMIC  =  0;
11GROUP (-lc -lslite931 -lgcc)
12
13/*
14 * The memory map looks like this:
15 * +--------------------+ <- low memory
16 * | .text              |
17 * |        _stext       |
18 * |        _etext      |
19 * |        ctor list   | the ctor and dtor lists are for
20 * |        dtor list   | C++ support
21 * |        _end_text   |
22 * +--------------------+
23 * | .data              | initialized data goes here
24 * |        _sdata      |
25 * |        _edata      |
26 * +--------------------+
27 * | .bss               |
28 * |        __bss_start | start of bss, cleared by crt0
29 * |        _end        | start of heap, used by sbrk()
30 * +--------------------+
31 * |    heap space      |
32 * |        _ENDHEAP    |
33 * |    stack space     |
34 * |        __stack     | top of stack
35 * +--------------------+ <- high memory
36 */
37
38_STACK_SIZE = (16 * 1024);
39_RAM_SIZE = 2M;
40_RAM_START = 0x40000000;
41_RAM_END = _RAM_START + _RAM_SIZE;
42
43/*
44 * Base address of the on-CPU peripherals. This is for compatability
45 * with the simulator.
46 */
47
48_ERC32_MEC = 0x0;
49
50/*
51 * Setup the memory map of the MB86931-EB Board (ex931)
52 * stack grows down towards low memory.
53 */
54MEMORY
55{
56  ram (rwx) : ORIGIN = 0x40000000, LENGTH = 2M
57}
58
59__stack = _RAM_START + _RAM_SIZE - 4 * 16;
60__trap_stack = (_RAM_START + _RAM_SIZE - 4 * 16) - _STACK_SIZE;
61
62/*
63 * All the symbols that might be accessed from C code need to be
64 * listed twice, once with an additional underscore. aout format needs
65 * and extra underscore, whereas coff & elf doesn't. This is to work
66 * with both.
67 */
68/*
69 * Initalize some symbols to be zero so we can reference them in the
70 * crt0 without core dumping. These functions are all optional, but
71 * we do this so we can have our crt0 always use them if they exist.
72 * This is so BSPs work better when using the crt0 installed with gcc.
73 * We have to initalize them twice, so we cover a.out (which prepends
74 * an underscore) and coff object file formats.
75 */
76PROVIDE (hardware_init_hook = 0);
77PROVIDE (_hardware_init_hook = 0);
78PROVIDE (software_init_hook = 0);
79PROVIDE (_software_init_hook = 0);
80SECTIONS
81{
82  .text : {
83    stext = .;
84    _stext = .;
85    CREATE_OBJECT_SYMBOLS
86    *(.text)
87     __CTOR_LIST__ = .;
88    LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2)
89    *(.ctors)
90    LONG(0)
91    __CTOR_END__ = .;
92    __DTOR_LIST__ = .;
93    LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2)
94    *(.dtors)
95     LONG(0)
96    __DTOR_END__ = .;
97    _etext  =  .;
98    *(.lit)
99    *(.shdata)
100  }  > ram
101  .shbss SIZEOF(.text) + ADDR(.text) :  {
102    *(.shbss)
103  }
104  .talias : { }  > ram
105  .data  : {
106    sdata  =  .;
107    _sdata  =  .;
108    *(.data)
109    edata  =  .;
110    _edata  =  .;
111  } > ram
112  .bss SIZEOF(.data) + ADDR(.data) : {
113   sbss = . ;
114   _sbss = . ;
115   __bss_start = ALIGN(0x8);
116   __bss_start = ALIGN(0x8);
117   *(.bss)
118   *(COMMON)
119     end = ALIGN(0x8);
120     _end = ALIGN(0x8);
121     __end = ALIGN(0x8);
122     ebss = .;
123     _ebss = .;
124  }
125  .mstack  : { }  > ram
126  .rstack  : { }  > ram
127  .stab  0 (NOLOAD) : {
128    [ .stab ]
129  }
130  .stabstr  0 (NOLOAD) :
131  {
132    [ .stabstr ]
133  }
134  /* DWARF debug sections.
135     Symbols in the DWARF debugging sections are relative to the beginning
136     of the section so we begin them at 0.  */
137  /* DWARF 1 */
138  .debug          0 : { *(.debug) }
139  .line           0 : { *(.line) }
140  /* GNU DWARF 1 extensions */
141  .debug_srcinfo  0 : { *(.debug_srcinfo) }
142  .debug_sfnames  0 : { *(.debug_sfnames) }
143  /* DWARF 1.1 and DWARF 2 */
144  .debug_aranges  0 : { *(.debug_aranges) }
145  .debug_pubnames 0 : { *(.debug_pubnames) }
146  /* DWARF 2 */
147  .debug_info     0 : { *(.debug_info) }
148  .debug_abbrev   0 : { *(.debug_abbrev) }
149  .debug_line     0 : { *(.debug_line) }
150  .debug_frame    0 : { *(.debug_frame) }
151  .debug_str      0 : { *(.debug_str) }
152  .debug_loc      0 : { *(.debug_loc) }
153  .debug_macinfo  0 : { *(.debug_macinfo) }
154  .debug_ranges   0 : { *(.debug_ranges) }
155  /* SGI/MIPS DWARF 2 extensions */
156  .debug_weaknames 0 : { *(.debug_weaknames) }
157  .debug_funcnames 0 : { *(.debug_funcnames) }
158  .debug_typenames 0 : { *(.debug_typenames) }
159  .debug_varnames  0 : { *(.debug_varnames) }
160  /* These must appear regardless of  .  */
161}
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