source: trunk/libs/newlib/src/libgloss/rs6000/xilinx.ld @ 684

Last change on this file since 684 was 444, checked in by satin@…, 7 years ago

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

File size: 9.6 KB
RevLine 
[444]1/* Default linker script, for normal executables
2
3Copyright (c) 2008, 2009 Xilinx, Inc.  All rights reserved.
4
5Redistribution and use in source and binary forms, with or without
6modification, are permitted provided that the following conditions are
7met:
8
91.  Redistributions source code must retain the above copyright notice,
10this list of conditions and the following disclaimer.
11
122.  Redistributions in binary form must reproduce the above copyright
13notice, this list of conditions and the following disclaimer in the
14documentation and/or other materials provided with the distribution.
15
163.  Neither the name of Xilinx nor the names of its contributors may be
17used to endorse or promote products derived from this software without
18specific prior written permission.
19
20THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
21IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
26TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31*/
32
33OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc",
34              "elf32-powerpc")
35OUTPUT_ARCH(powerpc:common)
36ENTRY(_boot)
37_START_ADDR = DEFINED(_START_ADDR) ? _START_ADDR : 0xFFFF0000;
38_STACK_SIZE = DEFINED(_STACK_SIZE) ? _STACK_SIZE : 4k;
39_HEAP_SIZE = DEFINED(_HEAP_SIZE) ? _HEAP_SIZE : 4k;
40STARTUP(boot.o)
41/* Do we need any of these for elf?
42   __DYNAMIC = 0;    */
43PROVIDE (__stack = 0); PROVIDE (___stack = 0);
44SECTIONS
45{
46
47  . = _START_ADDR;
48  .vectors  BLOCK (64k):
49  {
50    *(.vectors)
51  }
52  /* Read-only sections, merged into text segment: */
53  .hash           : { *(.hash)          }
54  .dynsym         : { *(.dynsym)                }
55  .dynstr         : { *(.dynstr)                }
56  .gnu.version   : { *(.gnu.version)      }
57  .gnu.version_d   : { *(.gnu.version_d)  }
58  .gnu.version_r   : { *(.gnu.version_r)  }
59  .rela.text     :
60    {
61      *(.rela.text)
62      *(.rela.text.*)
63      *(.rela.gnu.linkonce.t*)
64    }
65  .rela.data     :
66    {
67      *(.rela.data)
68      *(.rela.data.*)
69      *(.rela.gnu.linkonce.d*)
70    }
71  .rela.rodata   :
72    {
73      *(.rela.rodata)
74      *(.rela.rodata.*)
75      *(.rela.gnu.linkonce.r*)
76    }
77  .rela.got       : { *(.rela.got)      }
78  .rela.got1      : { *(.rela.got1)     }
79  .rela.got2      : { *(.rela.got2)     }
80  .rela.ctors     : { *(.rela.ctors)    }
81  .rela.dtors     : { *(.rela.dtors)    }
82  .rela.init      : { *(.rela.init)     }
83  .rela.fini      : { *(.rela.fini)     }
84  .rela.bss       : { *(.rela.bss)      }
85  .rela.plt       : { *(.rela.plt)      }
86  .rela.sdata     : { *(.rela.sdata)    }
87  .rela.sbss      : { *(.rela.sbss)     }
88  .rela.sdata2    : { *(.rela.sdata2)   }
89  .rela.sbss2     : { *(.rela.sbss2)    }
90  .text      :
91  {
92    *(.text)
93    *(.text.*)
94    /* .gnu.warning sections are handled specially by elf32.em.  */
95    *(.gnu.warning)
96    *(.gnu.linkonce.t.*)
97  } =0
98  .init           : { KEEP (*(.init))   } =0
99  .fini           : { KEEP (*(.fini))   } =0
100  .rodata    :
101  {
102    *(.rodata)
103    *(.rodata.*)
104    *(.gnu.linkonce.r.*)
105  }
106  .rodata1        : { *(.rodata1) }
107  _etext = .;
108  PROVIDE (etext = .);
109  PROVIDE (__etext = .);
110  .sdata2   : { *(.sdata2) *(.sdata2.*) *(.gnu.linkonce.s2.*)}
111  __SDATA2_START__ = ADDR(.sdata2);
112  __SDATA2_END__ = ADDR(.sdata2) + SIZEOF(.sdata2);
113  .sbss2   : { *(.sbss2) *(.gnu.linkonce.sb2.*)}
114  __SBSS2_START__ = ADDR(.sbss2);
115  __SBSS2_END__ = ADDR(.sbss2) + SIZEOF(.sbss2);
116  /* Adjust the address for the data segment.  We want to adjust up to
117     the same address within the page on the next page up.  It would
118     be more correct to do this:
119       . = ALIGN(0x08) + (ALIGN(8) & (0x08 - 1));
120     The current expression does not correctly handle the case of a
121     text segment ending precisely at the end of a page; it causes the
122     data segment to skip a page.  The above expression does not have
123     this problem, but it will currently (2/95) cause BFD to allocate
124     a single segment, combining both text and data, for this case.
125     This will prevent the text segment from being shared among
126     multiple executions of the program; I think that is more
127     important than losing a page of the virtual address space (note
128     that no actual memory is lost; the page which is skipped can not
129     be referenced).  */
130/*  . =  ALIGN(8) + 0x08;*/
131  .data    :
132  {
133    *(.data)
134    *(.data.*)
135    *(.gnu.linkonce.d*)
136    CONSTRUCTORS
137  }
138  .data1   : { *(.data1) }
139  .got1           : { *(.got1) }
140  .dynamic        : { *(.dynamic) }
141  /* Put .ctors and .dtors next to the .got2 section, so that the pointers
142     get relocated with -mrelocatable. Also put in the .fixup pointers.
143     The current compiler no longer needs this, but keep it around for 2.7.2  */
144                PROVIDE (_GOT2_START_ = .);
145                PROVIDE (__GOT2_START_ = .);
146  .got2           :  { *(.got2) }
147                PROVIDE (__CTOR_LIST__ = .);
148                PROVIDE (___CTOR_LIST__ = .);
149                .ctors   :
150  {
151    /* gcc uses crtbegin.o to find the start of
152       the constructors, so we make sure it is
153       first.  Because this is a wildcard, it
154       doesn't matter if the user does not
155       actually link against crtbegin.o; the
156       linker won't look for a file to match a
157       wildcard.  The wildcard also means that it
158       doesn't matter which directory crtbegin.o
159       is in.  */
160    KEEP (*crtbegin.o(.ctors))
161    /* We don't want to include the .ctor section from
162       from the crtend.o file until after the sorted ctors.
163       The .ctor section from the crtend file contains the
164       end of ctors marker and it must be last */
165    KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
166    KEEP (*(SORT(.ctors.*)))
167    KEEP (*(.ctors))
168  }
169                PROVIDE (__CTOR_END__ = .);
170                PROVIDE (___CTOR_END__ = .);
171                PROVIDE (__DTOR_LIST__ = .);
172                PROVIDE (___DTOR_LIST__ = .);
173                 .dtors         :
174  {
175    KEEP (*crtbegin.o(.dtors))
176    KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
177    KEEP (*(SORT(.dtors.*)))
178    KEEP (*(.dtors))
179  }
180                PROVIDE (__DTOR_END__ = .);
181                PROVIDE (___DTOR_END__ = .);
182                PROVIDE (_FIXUP_START_ = .);
183                PROVIDE (__FIXUP_START_ = .);
184  .fixup          : { *(.fixup) }
185                PROVIDE (_FIXUP_END_ = .);
186                PROVIDE (__FIXUP_END_ = .);
187                PROVIDE (_GOT2_END_ = .);
188                PROVIDE (__GOT2_END_ = .);
189                PROVIDE (_GOT_START_ = .);
190                PROVIDE (__GOT_START_ = .);
191  .got            : { *(.got) }
192  .got.plt        : { *(.got.plt) }
193                PROVIDE (_GOT_END_ = .);
194                PROVIDE (__GOT_END_ = .);
195  /* Added by Sathya to handle C++ exceptions */
196  .eh_frame   : {
197    *(.eh_frame)
198  }
199  .jcr   : {
200    *(.jcr)
201  }
202  .gcc_except_table   : {
203    *(.gcc_except_table)
204  }
205  /* We want the small data sections together, so single-instruction offsets
206     can access them all, and initialized data all before uninitialized, so
207     we can shorten the on-disk segment size.  */
208  .sdata          : { *(.sdata) *(.sdata.*) *(.gnu.linkonce.s.*)}
209  __SDATA_START__ = ADDR(.sdata);
210  __SDATA_END__ = ADDR(.sdata) + SIZEOF(.sdata);
211  _edata  =  .;
212  PROVIDE (edata = .);
213  PROVIDE (__edata = .);
214  .sbss      :
215  {
216    __sbss_start = .;
217    ___sbss_start = .;
218    *(.sbss)
219    *(.sbss.*)
220    *(.gnu.linkonce.sb.*)
221    *(.scommon)
222    *(.dynsbss)
223    __sbss_end = .;
224    ___sbss_end = .;
225  }
226  .plt   : { *(.plt) }
227  .bss       :
228  {
229   __bss_start = .;
230   ___bss_start = .;
231   *(.dynbss)
232   *(.bss)
233   *(.bss.*)
234   *(.gnu.linkonce.b.*)
235   *(COMMON)
236   . = ALIGN(4);
237   __bss_end = .;
238  }
239
240  .stack     :
241  {
242    _stack_end = .;
243    . = . + _STACK_SIZE;
244    . = ALIGN(16);
245    __stack = .;
246  }
247
248  .heap      :
249  {
250    _heap_start = .;
251    . = . + _HEAP_SIZE;
252    . = ALIGN(16);
253    _heap_end = .;
254  }
255
256  .tdata   : {
257    *(.tdata)
258    *(.tdata.*)
259    *(.gnu.linkonce.td.*)
260  }
261  .tbss   : {
262    *(.tbss)
263    *(.gnu.linkonce.tb.*)
264  }
265  /* Check to see if boot0 is going to be within 24bits from boot */
266  /* If so, then leave the location counter as is. */
267  /* If not, then make location counter to be 0x20 locations above boot location */
268  /* This assumes that a BRAM is present for boot and hence 0x20 locations above it are valid */
269  /* This fixes CR 183394 */
270 __boot0_flag__ = ((. > 0x00ffffff) && (. < 0xff000000)) ? 1 : 0;
271 . = (__boot0_flag__) ? 0xffffffdc : .;
272  .boot0  : { *(.boot0)}
273  _end = . ;
274  end = .;
275  __end = .;
276  .boot  0xFFFFFFFC  : { *(.boot) }
277  /* These are needed for ELF backends which have not yet been
278     converted to the new style linker.  */
279  .stab 0 : { *(.stab) }
280  .stabstr 0 : { *(.stabstr) }
281  /* DWARF debug sections.
282     Symbols in the DWARF debugging sections are relative to the beginning
283     of the section so we begin them at 0.  */
284  /* DWARF 1 */
285  .debug          0 : { *(.debug) }
286  .line           0 : { *(.line) }
287  /* GNU DWARF 1 extensions */
288  .debug_srcinfo  0 : { *(.debug_srcinfo) }
289  .debug_sfnames  0 : { *(.debug_sfnames) }
290  /* DWARF 1.1 and DWARF 2 */
291  .debug_aranges  0 : { *(.debug_aranges) }
292  .debug_pubnames 0 : { *(.debug_pubnames) }
293  /* DWARF 2 */
294  .debug_info     0 : { *(.debug_info) }
295  .debug_abbrev   0 : { *(.debug_abbrev) }
296  .debug_line     0 : { *(.debug_line) }
297  .debug_frame    0 : { *(.debug_frame) }
298  .debug_str      0 : { *(.debug_str) }
299  .debug_loc      0 : { *(.debug_loc) }
300  .debug_macinfo  0 : { *(.debug_macinfo) }
301  /* SGI/MIPS DWARF 2 extensions */
302  .debug_weaknames 0 : { *(.debug_weaknames) }
303  .debug_funcnames 0 : { *(.debug_funcnames) }
304  .debug_typenames 0 : { *(.debug_typenames) }
305  .debug_varnames  0 : { *(.debug_varnames) }
306  /* These must appear regardless of  .  */
307}
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