1# A PE linker script for PowerPC.
2# Loosely based on Steve Chamberlain's pe.sc.
3# All new mistakes should be credited to Kim Knuttila (krk@cygnus.com)
4#
5# Copyright (C) 2014-2017 Free Software Foundation, Inc.
6# 
7# Copying and distribution of this file, with or without modification,
8# are permitted in any medium without royalty provided the copyright
9# notice and this notice are preserved.
10#
11# These are substituted in as variables in order to get '}' in a shell
12# conditional expansion.
13
14INIT='.init : { *(.init) }'
15FINI='.fini : { *(.fini) }'
16
17cat <<EOF
18/* Copyright (C) 2014-2017 Free Software Foundation, Inc.
19
20   Copying and distribution of this script, with or without modification,
21   are permitted in any medium without royalty provided the copyright
22   notice and this notice are preserved.  */
23
24OUTPUT_FORMAT(${OUTPUT_FORMAT})
25${LIB_SEARCH_DIRS}
26
27/* Much of this layout was determined by delving into .exe files for
28   the box generated by other compilers/linkers/etc. This means that
29   if a particular feature did not happen to appear in one of the 
30   subject files, then it may not be yet supported.
31*/
32
33/* It's "mainCRTStartup", not "_mainCRTStartup", and it's located in
34   one of the two .lib files (libc.lib and kernel32.lib) that currently
35   must be present on the link line. This means that you must use 
36   "-u mainCRTStartup" to make sure it gets included in the link.
37*/
38
39${RELOCATING+ENTRY (mainCRTStartup)}
40
41SECTIONS
42{
43
44  /* text - the usual meaning */
45  .text ${RELOCATING+ __image_base__ + __section_alignment__ } : 
46	{
47	    ${RELOCATING+ *(.init);}
48	    *(.text)
49	    ${RELOCATING+ *(.text.*)}
50	    *(.gcc_except_table)
51	    ${CONSTRUCTING+ ___CTOR_LIST__ = .; __CTOR_LIST__ = . ; 
52		        LONG (-1); *(.ctors); *(.ctor); LONG (0); }
53            ${CONSTRUCTING+ ___DTOR_LIST__ = .; __DTOR_LIST__ = . ; 
54			LONG (-1); *(.dtors); *(.dtor);  LONG (0); }
55	    ${RELOCATING+ *(.fini);}
56	    ${RELOCATING+ etext  =  .};
57	}
58
59  /* rdata - Read Only Runtime Data
60     CTR sections: All of the CRT (read only C runtime data) sections 
61	appear at the start of the .rdata (read only runtime data) 
62	section, in the following order. Don't know if it matters or not.
63	Not all sections are always present either.
64     .rdata: compiler generated read only data
65     .xdata: compiler generated exception handling table. (Most docs
66	seem to suggest that this section is now deprecated infavor
67	of the ydata section)
68     .edata: The exported names table.
69  */
70  .rdata BLOCK(__section_alignment__) :
71	{
72	    *(.CRT\$XCA);
73	    *(.CRT\$XCC);
74	    *(.CRT\$XCZ);
75	    *(.CRT\$XIA);
76	    *(.CRT\$XIC);
77	    *(.CRT\$XIZ);
78	    *(.CRT\$XLA);
79	    *(.CRT\$XLZ);
80	    *(.CRT\$XPA);
81	    *(.CRT\$XPX);
82	    *(.CRT\$XPZ);
83	    *(.CRT\$XTA);
84	    *(.CRT\$XTZ);
85	    *(.rdata);
86	    *(.xdata);
87	}
88
89  .edata BLOCK(__section_alignment__) :
90	{
91    	    *(.edata);
92	}
93
94  /* data - initialized data
95     .ydata: exception handling information.
96     .data: the usual meaning.
97     .data2: more of the same.
98     .bss: For some reason, bss appears to be included in the data
99	section, as opposed to being given a section of it's own.
100     COMMON:
101  */
102  .data BLOCK(__section_alignment__) : 
103	{
104	    __data_start__ = . ; 
105	    *(.ydata);
106	    *(.data);
107	    *(.data2);
108	    __bss_start__ = . ;
109	    *(.bss) ;
110	    *(COMMON);
111	    __bss_end__ = . ;
112	    ${RELOCATING+ end =  .};
113 	    __data_end__ = . ; 
114	}
115
116  /* The exception handling table. A sequence of 5 word entries. Section
117     address and extent are placed in the DataDirectory.
118  */
119  .pdata BLOCK(__section_alignment__) :
120	{ 					
121	    *(.pdata)
122 	    ;
123	}
124
125  /* The idata section is chock full of magic bits. 
126	1. Boundaries around various idata parts are used to initialize
127	   some of the fields of the DataDirectory. In particular, the
128	   magic for 2, 4 and 5 are known to be used. Some compilers
129	   appear to generate magic section symbols for this purpose.
130	   Where we can, we catch such symbols and use our own. This of
131	   course is something less than a perfect strategy.
132	2. The table of contents is placed immediately after idata4.
133	   The ".private.toc" sections are generated by the ppc bfd. The
134	   .toc variable is generated by gas, and resolved here. It is
135	   used to initialized function descriptors (and anyone else who
136	   needs the address of the module's toc). The only thing 
137	   interesting about it at all? Most ppc instructions using it
138	   have a 16bit displacement field. The convention for addressing
139	   is to initialize the .toc value to 32K past the start of the
140	   actual toc, and subtract 32K from all references, thus using
141	   the entire 64K range. Naturally, the reloc code must agree
142	   on this number or you get pretty stupid results.
143  */
144  .idata BLOCK(__section_alignment__) :
145	{ 					
146	    __idata2_magic__ = .;
147	    *(.idata\$2);
148	    __idata3_magic__ = .;
149	    *(.idata\$3);
150	    __idata4_magic__ = .;
151	    *(.idata\$4);
152	    . = ALIGN(4);
153	    .toc = . + 32768;
154	    *(.private.toc);
155	    __idata5_magic__ = .;
156	    *(.idata\$5);
157	    __idata6_magic__ = .;
158	    *(.idata\$6);
159	    __idata7_magic__ = .;
160	    *(.idata\$7);
161	    ;
162	}
163
164  /* reldata -- data that requires relocation
165  */
166  .reldata BLOCK(__section_alignment__) :
167	{ 					
168	    *(.reldata)
169 	    ;
170	}
171
172
173  /* Resources */
174  .rsrc BLOCK(__section_alignment__) :
175	{ 					
176	    *(.rsrc\$01)
177	    *(.rsrc\$02)
178	    ;
179	}
180
181  .stab BLOCK(__section_alignment__)  ${RELOCATING+(NOLOAD)} : 
182  {
183    [ .stab ]
184  }
185
186  .stabstr BLOCK(__section_alignment__) ${RELOCATING+(NOLOAD)} :
187  {
188    [ .stabstr ]
189  }
190
191  /* The .reloc section is currently generated by the dlltool from Steve 
192     Chamberlain in a second pass of linking. Section address and extent
193     are placed in the DataDirectory.
194  */
195  .reloc BLOCK(__section_alignment__) :
196	{ 					
197	    *(.reloc)
198	    ;
199	}
200
201  /* We don't do anything useful with codeview debugger support or the
202     directive section (yet). Hopefully, we junk them correctly. 
203  */
204  /DISCARD/ BLOCK(__section_alignment__) : 
205	{
206    	    *(.debug\$S)
207    	    *(.debug\$T)
208    	    *(.debug\$F)
209    	    *(.drectve)
210    	    ;
211   	}
212}
213EOF
214