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comparison usr/src/cmd/sgs/include/sparc/machdep_sparc.h @ 13004:92dfdb3a48cc

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6935867 .dynamic could be readonly in sharable objects
author Rod Evans <Rod.Evans@Oracle.COM>
date Mon, 02 Aug 2010 14:04:48 -0700
parents d7ef53deac3f
children
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13003:b4084e8201cf 13004:92dfdb3a48cc
21 21
22 /* 22 /*
23 * Copyright (c) 1988 AT&T 23 * Copyright (c) 1988 AT&T
24 * All Rights Reserved 24 * All Rights Reserved
25 * 25 *
26 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 26 * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
27 * Use is subject to license terms.
28 * 27 *
29 * Global include file for all sgs SPARC machine dependent macros, constants 28 * Global include file for all sgs SPARC machine dependent macros, constants
30 * and declarations. 29 * and declarations.
31 */ 30 */
32 31
193 #define M_STACK_PERM (PF_R | PF_W) 192 #define M_STACK_PERM (PF_R | PF_W)
194 #else 193 #else
195 #define M_STACK_PERM (PF_R | PF_W | PF_X) 194 #define M_STACK_PERM (PF_R | PF_W | PF_X)
196 #endif 195 #endif
197 196
198
199 /* 197 /*
200 * Define a set of identifies for special sections. These allow the sections 198 * Define a set of identifies for special sections. These allow the sections
201 * to be ordered within the output file image. These values should be 199 * to be ordered within the output file image. These values should be
202 * maintained consistently, where appropriate, in each platform specific header 200 * maintained consistently, where appropriate, in each platform specific header
203 * file. 201 * file.
204 * 202 *
205 * o null identifies that this section does not need to be added to the 203 * - null identifies that this section does not need to be added to the
206 * output image (ie. shared object sections or sections we're going to 204 * output image (ie. shared object sections or sections we're going to
207 * recreate (sym tables, string tables, relocations, etc.)). 205 * recreate (sym tables, string tables, relocations, etc.)).
208 * 206 *
209 * o any user defined section will be first in the associated segment. 207 * - any user defined section will be first in the associated segment.
210 * 208 *
211 * o interp and capabilities sections are next, as these are accessed 209 * - interp and capabilities sections are next, as these are accessed
212 * immediately the first page of the image is mapped. 210 * immediately the first page of the image is mapped.
213 * 211 *
214 * o the syminfo, hash, dynsym, dynstr and rel's are grouped together as 212 * - objects that do not provide an interp normally have a read-only
215 * these will all be accessed first by ld.so.1 to perform relocations. 213 * .dynamic section that comes next (in this case, there is no need to
216 * 214 * update a DT_DEBUG entry at runtime).
217 * o the got, dynamic, and plt are grouped together as these may also be 215 *
216 * - the syminfo, hash, dynsym, dynstr and rel's are grouped together as
217 * these will all be accessed together by ld.so.1 to perform relocations.
218 *
219 * - the got, dynamic, and plt are grouped together as these may also be
218 * accessed first by ld.so.1 to perform relocations, fill in DT_DEBUG 220 * accessed first by ld.so.1 to perform relocations, fill in DT_DEBUG
219 * (executables only), and .plt[0]. 221 * (executables only), and .plt[0].
220 * 222 *
221 * o unknown sections (stabs, comments etc.) go at the end. 223 * - unknown sections (stabs, comments, etc.) go at the end.
222 * 224 *
223 * Note that .tlsbss/.bss are given the largest identifiers. This insures that 225 * Note that .tlsbss/.bss are given the largest identifiers. This insures that
224 * if any unknown sections become associated to the same segment as the .bss, 226 * if any unknown sections become associated to the same segment as the .bss,
225 * the .bss sections are always the last section in the segment. 227 * the .bss sections are always the last section in the segment.
226 */ 228 */
227 #define M_ID_NULL 0x00 229 #define M_ID_NULL 0x00
228 #define M_ID_USER 0x01 230 #define M_ID_USER 0x01
229 231
230 #define M_ID_INTERP 0x02 /* SHF_ALLOC */ 232 #define M_ID_INTERP 0x02 /* SHF_ALLOC */
231 #define M_ID_CAP 0x03 233 #define M_ID_CAP 0x03
232 234 #define M_ID_CAPINFO 0x04
233 #define M_ID_UNWINDHDR 0x06 235 #define M_ID_CAPCHAIN 0x05
234 #define M_ID_UNWIND 0x07 236
235 #define M_ID_CAPINFO 0x08 237 #define M_ID_DYNAMIC 0x06 /* if no .interp, then no */
236 #define M_ID_CAPCHAIN 0x09 238 /* DT_DEBUG is required */
237 #define M_ID_SYMINFO 0x0a 239 #define M_ID_UNWINDHDR 0x07
238 #define M_ID_HASH 0x0b 240 #define M_ID_UNWIND 0x08
239 #define M_ID_LDYNSYM 0x0c /* always right before DYNSYM */ 241
240 #define M_ID_DYNSYM 0x0d 242 #define M_ID_SYMINFO 0x09
241 #define M_ID_DYNSTR 0x0e 243 #define M_ID_HASH 0x0a
242 #define M_ID_VERSION 0x0f 244 #define M_ID_LDYNSYM 0x0b /* always right before DYNSYM */
243 #define M_ID_DYNSORT 0x10 245 #define M_ID_DYNSYM 0x0c
244 #define M_ID_REL 0x11 246 #define M_ID_DYNSTR 0x0d
247 #define M_ID_VERSION 0x0e
248 #define M_ID_DYNSORT 0x0f
249 #define M_ID_REL 0x10
250 #define M_ID_ARRAY 0x11
245 #define M_ID_TEXT 0x12 /* SHF_ALLOC + SHF_EXECINSTR */ 251 #define M_ID_TEXT 0x12 /* SHF_ALLOC + SHF_EXECINSTR */
246 #define M_ID_DATA 0x20 252 #define M_ID_DATA 0x20
247 253
248 /* M_ID_USER 0x01 dual entry - listed above */ 254 /* M_ID_USER 0x01 dual entry - listed above */
249 #define M_ID_GOTDATA 0x02 /* SHF_ALLOC + SHF_WRITE */ 255 #define M_ID_GOTDATA 0x02 /* SHF_ALLOC + SHF_WRITE */
250 #define M_ID_GOT 0x03 256 #define M_ID_GOT 0x03
251 #define M_ID_PLT 0x04 257 #define M_ID_PLT 0x04
252 #define M_ID_DYNAMIC 0x05 258 /* M_ID_DYNAMIC 0x06 dual entry - listed above */
253 #define M_ID_ARRAY 0x06 259 /* M_ID_UNWIND 0x08 dual entry - listed above */
254 /* M_ID_UNWIND 0x07 dual entry - listed above */
255 260
256 #define M_ID_UNKNOWN 0xfc /* just before TLS */ 261 #define M_ID_UNKNOWN 0xfc /* just before TLS */
257 262
258 #define M_ID_TLS 0xfd /* just before bss */ 263 #define M_ID_TLS 0xfd /* just before bss */
259 #define M_ID_TLSBSS 0xfe 264 #define M_ID_TLSBSS 0xfe