head 1.17; access; symbols netbsd-11-0-RC5:1.17 netbsd-11-0-RC4:1.17 netbsd-11-0-RC3:1.17 netbsd-11-0-RC2:1.17 netbsd-11-0-RC1:1.17 perseant-exfatfs-base-20250801:1.17 netbsd-11:1.17.0.2 netbsd-11-base:1.17 netbsd-10-1-RELEASE:1.16 perseant-exfatfs-base-20240630:1.16 perseant-exfatfs:1.16.0.108 perseant-exfatfs-base:1.16 netbsd-8-3-RELEASE:1.16 netbsd-9-4-RELEASE:1.16 netbsd-10-0-RELEASE:1.16 netbsd-10-0-RC6:1.16 netbsd-10-0-RC5:1.16 netbsd-10-0-RC4:1.16 netbsd-10-0-RC3:1.16 netbsd-10-0-RC2:1.16 netbsd-10-0-RC1:1.16 netbsd-10:1.16.0.106 netbsd-10-base:1.16 netbsd-9-3-RELEASE:1.16 cjep_sun2x-base1:1.16 cjep_sun2x:1.16.0.104 cjep_sun2x-base:1.16 cjep_staticlib_x-base1:1.16 netbsd-9-2-RELEASE:1.16 cjep_staticlib_x:1.16.0.102 cjep_staticlib_x-base:1.16 netbsd-9-1-RELEASE:1.16 phil-wifi-20200421:1.16 phil-wifi-20200411:1.16 is-mlppp:1.16.0.100 is-mlppp-base:1.16 phil-wifi-20200406:1.16 netbsd-8-2-RELEASE:1.16 netbsd-9-0-RELEASE:1.16 netbsd-9-0-RC2:1.16 netbsd-9-0-RC1:1.16 phil-wifi-20191119:1.16 netbsd-9:1.16.0.98 netbsd-9-base:1.16 phil-wifi-20190609:1.16 netbsd-8-1-RELEASE:1.16 netbsd-8-1-RC1:1.16 pgoyette-compat-merge-20190127:1.16 pgoyette-compat-20190127:1.16 pgoyette-compat-20190118:1.16 pgoyette-compat-1226:1.16 pgoyette-compat-1126:1.16 pgoyette-compat-1020:1.16 pgoyette-compat-0930:1.16 pgoyette-compat-0906:1.16 netbsd-7-2-RELEASE:1.16 pgoyette-compat-0728:1.16 netbsd-8-0-RELEASE:1.16 phil-wifi:1.16.0.96 phil-wifi-base:1.16 pgoyette-compat-0625:1.16 netbsd-8-0-RC2:1.16 pgoyette-compat-0521:1.16 pgoyette-compat-0502:1.16 pgoyette-compat-0422:1.16 netbsd-8-0-RC1:1.16 pgoyette-compat-0415:1.16 pgoyette-compat-0407:1.16 pgoyette-compat-0330:1.16 pgoyette-compat-0322:1.16 pgoyette-compat-0315:1.16 netbsd-7-1-2-RELEASE:1.16 pgoyette-compat:1.16.0.94 pgoyette-compat-base:1.16 netbsd-7-1-1-RELEASE:1.16 matt-nb8-mediatek:1.16.0.92 matt-nb8-mediatek-base:1.16 perseant-stdc-iso10646:1.16.0.90 perseant-stdc-iso10646-base:1.16 netbsd-8:1.16.0.88 netbsd-8-base:1.16 prg-localcount2-base3:1.16 prg-localcount2-base2:1.16 prg-localcount2-base1:1.16 prg-localcount2:1.16.0.86 prg-localcount2-base:1.16 pgoyette-localcount-20170426:1.16 bouyer-socketcan-base1:1.16 pgoyette-localcount-20170320:1.16 netbsd-7-1:1.16.0.84 netbsd-7-1-RELEASE:1.16 netbsd-7-1-RC2:1.16 netbsd-7-nhusb-base-20170116:1.16 bouyer-socketcan:1.16.0.82 bouyer-socketcan-base:1.16 pgoyette-localcount-20170107:1.16 netbsd-7-1-RC1:1.16 pgoyette-localcount-20161104:1.16 netbsd-7-0-2-RELEASE:1.16 localcount-20160914:1.16 netbsd-7-nhusb:1.16.0.80 netbsd-7-nhusb-base:1.16 pgoyette-localcount-20160806:1.16 pgoyette-localcount-20160726:1.16 pgoyette-localcount:1.16.0.78 pgoyette-localcount-base:1.16 netbsd-7-0-1-RELEASE:1.16 netbsd-7-0:1.16.0.76 netbsd-7-0-RELEASE:1.16 netbsd-7-0-RC3:1.16 netbsd-7-0-RC2:1.16 netbsd-7-0-RC1:1.16 netbsd-5-2-3-RELEASE:1.16 netbsd-5-1-5-RELEASE:1.16 netbsd-6-0-6-RELEASE:1.16 netbsd-6-1-5-RELEASE:1.16 netbsd-7:1.16.0.74 netbsd-7-base:1.16 yamt-pagecache-base9:1.16 yamt-pagecache-tag8:1.16 netbsd-6-1-4-RELEASE:1.16 netbsd-6-0-5-RELEASE:1.16 tls-earlyentropy:1.16.0.72 tls-earlyentropy-base:1.16 riastradh-xf86-video-intel-2-7-1-pre-2-21-15:1.16 riastradh-drm2-base3:1.16 netbsd-6-1-3-RELEASE:1.16 netbsd-6-0-4-RELEASE:1.16 netbsd-5-2-2-RELEASE:1.16 netbsd-5-1-4-RELEASE:1.16 netbsd-6-1-2-RELEASE:1.16 netbsd-6-0-3-RELEASE:1.16 netbsd-5-2-1-RELEASE:1.16 netbsd-5-1-3-RELEASE:1.16 netbsd-6-1-1-RELEASE:1.16 riastradh-drm2-base2:1.16 riastradh-drm2-base1:1.16 riastradh-drm2:1.16.0.66 riastradh-drm2-base:1.16 netbsd-6-1:1.16.0.70 netbsd-6-0-2-RELEASE:1.16 netbsd-6-1-RELEASE:1.16 netbsd-6-1-RC4:1.16 netbsd-6-1-RC3:1.16 agc-symver:1.16.0.68 agc-symver-base:1.16 netbsd-6-1-RC2:1.16 netbsd-6-1-RC1:1.16 yamt-pagecache-base8:1.16 netbsd-5-2:1.16.0.64 netbsd-6-0-1-RELEASE:1.16 yamt-pagecache-base7:1.16 netbsd-5-2-RELEASE:1.16 netbsd-5-2-RC1:1.16 matt-nb6-plus-nbase:1.16 yamt-pagecache-base6:1.16 netbsd-6-0:1.16.0.62 netbsd-6-0-RELEASE:1.16 netbsd-6-0-RC2:1.16 tls-maxphys:1.16.0.60 tls-maxphys-base:1.16 matt-nb6-plus:1.16.0.58 matt-nb6-plus-base:1.16 netbsd-6-0-RC1:1.16 yamt-pagecache-base5:1.16 yamt-pagecache-base4:1.16 netbsd-6:1.16.0.56 netbsd-6-base:1.16 netbsd-5-1-2-RELEASE:1.16 netbsd-5-1-1-RELEASE:1.16 yamt-pagecache-base3:1.16 yamt-pagecache-base2:1.16 yamt-pagecache:1.16.0.54 yamt-pagecache-base:1.16 cherry-xenmp:1.16.0.52 cherry-xenmp-base:1.16 bouyer-quota2-nbase:1.16 bouyer-quota2:1.16.0.50 bouyer-quota2-base:1.16 matt-mips64-premerge-20101231:1.16 matt-nb5-mips64-premerge-20101231:1.16 matt-nb5-pq3:1.16.0.48 matt-nb5-pq3-base:1.16 netbsd-5-1:1.16.0.46 netbsd-5-1-RELEASE:1.16 netbsd-5-1-RC4:1.16 matt-nb5-mips64-k15:1.16 netbsd-5-1-RC3:1.16 netbsd-5-1-RC2:1.16 netbsd-5-1-RC1:1.16 netbsd-5-0-2-RELEASE:1.16 matt-nb5-mips64-premerge-20091211:1.16 matt-premerge-20091211:1.16 matt-nb5-mips64-u2-k2-k4-k7-k8-k9:1.16 matt-nb4-mips64-k7-u2a-k9b:1.16 matt-nb5-mips64-u1-k1-k5:1.16 matt-nb5-mips64:1.16.0.44 netbsd-5-0-1-RELEASE:1.16 jym-xensuspend-nbase:1.16 netbsd-5-0:1.16.0.42 netbsd-5-0-RELEASE:1.16 netbsd-5-0-RC4:1.16 netbsd-5-0-RC3:1.16 netbsd-5-0-RC2:1.16 jym-xensuspend:1.16.0.40 jym-xensuspend-base:1.16 netbsd-5-0-RC1:1.16 netbsd-5:1.16.0.38 netbsd-5-base:1.16 matt-mips64-base2:1.16 matt-mips64:1.16.0.36 mjf-devfs2:1.16.0.34 mjf-devfs2-base:1.16 netbsd-4-0-1-RELEASE:1.16 wrstuden-revivesa-base-3:1.16 wrstuden-revivesa-base-2:1.16 wrstuden-fixsa-newbase:1.16 wrstuden-revivesa-base-1:1.16 yamt-pf42-base4:1.16 yamt-pf42-base3:1.16 hpcarm-cleanup-nbase:1.16 yamt-pf42-baseX:1.16 yamt-pf42-base2:1.16 wrstuden-revivesa:1.16.0.32 wrstuden-revivesa-base:1.16 yamt-pf42:1.16.0.30 yamt-pf42-base:1.16 keiichi-mipv6:1.16.0.28 keiichi-mipv6-base:1.16 matt-armv6-nbase:1.16 matt-armv6-prevmlocking:1.16 wrstuden-fixsa-base-1:1.16 netbsd-4-0:1.16.0.26 netbsd-4-0-RELEASE:1.16 cube-autoconf:1.16.0.24 cube-autoconf-base:1.16 netbsd-4-0-RC5:1.16 netbsd-4-0-RC4:1.16 netbsd-4-0-RC3:1.16 netbsd-4-0-RC2:1.16 netbsd-4-0-RC1:1.16 matt-armv6:1.16.0.22 matt-armv6-base:1.16 matt-mips64-base:1.16 hpcarm-cleanup:1.16.0.20 hpcarm-cleanup-base:1.16 netbsd-3-1-1-RELEASE:1.16 netbsd-3-0-3-RELEASE:1.16 wrstuden-fixsa:1.16.0.18 wrstuden-fixsa-base:1.16 abandoned-netbsd-4-base:1.16 abandoned-netbsd-4:1.16.0.12 netbsd-3-1:1.16.0.14 netbsd-3-1-RELEASE:1.16 netbsd-3-0-2-RELEASE:1.16 netbsd-3-1-RC4:1.16 netbsd-3-1-RC3:1.16 netbsd-3-1-RC2:1.16 netbsd-3-1-RC1:1.16 netbsd-4:1.16.0.16 netbsd-4-base:1.16 netbsd-3-0-1-RELEASE:1.16 netbsd-3-0:1.16.0.10 netbsd-3-0-RELEASE:1.16 netbsd-3-0-RC6:1.16 netbsd-3-0-RC5:1.16 netbsd-3-0-RC4:1.16 netbsd-3-0-RC3:1.16 netbsd-3-0-RC2:1.16 netbsd-3-0-RC1:1.16 netbsd-2-0-3-RELEASE:1.16 netbsd-2-1:1.16.0.8 netbsd-2-1-RELEASE:1.16 netbsd-2-1-RC6:1.16 netbsd-2-1-RC5:1.16 netbsd-2-1-RC4:1.16 netbsd-2-1-RC3:1.16 netbsd-2-1-RC2:1.16 netbsd-2-1-RC1:1.16 netbsd-2-0-2-RELEASE:1.16 netbsd-3:1.16.0.6 netbsd-3-base:1.16 netbsd-2-0-1-RELEASE:1.16 netbsd-2:1.16.0.4 netbsd-2-base:1.16 netbsd-2-0-RELEASE:1.16 netbsd-2-0-RC5:1.16 netbsd-2-0-RC4:1.16 netbsd-2-0-RC3:1.16 netbsd-2-0-RC2:1.16 netbsd-2-0-RC1:1.16 netbsd-2-0:1.16.0.2 netbsd-2-0-base:1.16 netbsd-1-6-PATCH002-RELEASE:1.8.2.1 netbsd-1-6-PATCH002:1.8.2.1 netbsd-1-6-PATCH002-RC4:1.8.2.1 netbsd-1-6-PATCH002-RC3:1.8.2.1 netbsd-1-6-PATCH002-RC2:1.8.2.1 netbsd-1-6-PATCH002-RC1:1.8.2.1 netbsd-1-6-PATCH001:1.8.2.1 netbsd-1-6-PATCH001-RELEASE:1.8.2.1 netbsd-1-6-PATCH001-RC3:1.8.2.1 netbsd-1-6-PATCH001-RC2:1.8.2.1 netbsd-1-6-PATCH001-RC1:1.8.2.1 fvdl_fs64_base:1.15 netbsd-1-6-RELEASE:1.8 netbsd-1-6-RC3:1.8 netbsd-1-6-RC2:1.8 netbsd-1-6-RC1:1.8 netbsd-1-6:1.8.0.2 netbsd-1-6-base:1.8 netbsd-1-5-PATCH003:1.3.8.1 netbsd-1-5-PATCH002:1.3 netbsd-1-5-PATCH001:1.3 netbsd-1-5-RELEASE:1.3 netbsd-1-5-BETA2:1.3 netbsd-1-5-BETA:1.3 netbsd-1-4-PATCH003:1.1 netbsd-1-5-ALPHA2:1.3 netbsd-1-5:1.3.0.8 netbsd-1-5-base:1.3 minoura-xpg4dl:1.3.0.6 minoura-xpg4dl-base:1.3 netbsd-1-4-PATCH002:1.1 wrstuden-devbsize-19991221:1.3 wrstuden-devbsize:1.3.0.4 wrstuden-devbsize-base:1.3 comdex-fall-1999:1.3.0.2 comdex-fall-1999-base:1.3 netbsd-1-4-PATCH001:1.1 netbsd-1-4-RELEASE:1.1 netbsd-1-4:1.1.0.2 netbsd-1-4-base:1.1; locks; strict; comment @# @; 1.17 date 2025.04.18.17.56.49; author riastradh; state Exp; branches; next 1.16; commitid MYywy6bialwNMyRF; 1.16 date 2004.02.18.23.04.49; author enami; state Exp; branches 1.16.108.1; next 1.15; 1.15 date 2002.10.05.11.59.05; author mycroft; state Exp; branches; next 1.14; 1.14 date 2002.09.12.17.18.37; author mycroft; state Exp; branches; next 1.13; 1.13 date 2002.09.12.17.07.25; author mycroft; state Exp; branches; next 1.12; 1.12 date 2002.09.11.20.56.09; author mycroft; state Exp; branches; next 1.11; 1.11 date 2002.09.11.18.18.37; author mycroft; state Exp; branches; next 1.10; 1.10 date 2002.09.08.02.48.28; author thorpej; state Exp; branches; next 1.9; 1.9 date 2002.09.04.19.13.01; author mycroft; state Exp; branches; next 1.8; 1.8 date 2001.12.14.21.25.23; author thorpej; state Exp; branches 1.8.2.1; next 1.7; 1.7 date 2001.12.13.22.34.52; author thorpej; state Exp; branches; next 1.6; 1.6 date 2001.12.13.21.34.04; author thorpej; state Exp; branches; next 1.5; 1.5 date 2001.12.13.20.30.48; author thorpej; state Exp; branches; next 1.4; 1.4 date 2001.05.28.06.10.20; author nathanw; state Exp; branches; next 1.3; 1.3 date 99.04.19.00.05.00; author thorpej; state Exp; branches 1.3.8.1; next 1.2; 1.2 date 99.04.18.23.12.59; author thorpej; state Exp; branches; next 1.1; 1.1 date 96.12.16.20.38.09; author cgd; state Exp; branches; next ; 1.16.108.1 date 2025.08.02.05.55.01; author perseant; state Exp; branches; next ; commitid 23j6GFaDws3O875G; 1.8.2.1 date 2002.11.30.14.22.19; author he; state Exp; branches; next 1.8.2.2; 1.8.2.2 date 2004.05.28.08.31.22; author tron; state Exp; branches; next ; 1.3.8.1 date 2001.12.09.17.23.30; author he; state Exp; branches; next ; desc @@ 1.17 log @ld.elf_so on alpha: Add support for secureplt. ok thorpej PR port-alpha/57511: ld.elf_so(1) does not support secure PLT for alpha PR port-alpha/57717: Alpha linker generates LOAD segments (and generates warnings about them) @ text @/* $NetBSD: rtld_start.S,v 1.16 2004/02/18 23:04:49 enami Exp $ */ /* * Copyright 1996 Matt Thomas * Portions copyright 2002 Charles M. Hannum * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include /* * Note: we can call ourselves LEAF even though we use callee-saved * registers because we're the root of the call graph. */ LEAF_NOPROFILE(_rtld_start, 0) .set noreorder br pv, 1f 1: LDGP(pv) /* * Relocate ourself. */ br s2, 2f /* get our PC */ 2: ldiq s3, 2b /* get where the linker thought we were */ subq s2, s3, a1 /* relocbase */ lda t5, _DYNAMIC addq a1, t5, a0 /* &_DYNAMIC */ /* Squirrel away ps_strings. */ mov a3, s0 bsr ra, _rtld_relocate_nonplt_self LDGP(ra) /* * Allocate space on the stack for the cleanup and obj_main * entries that _rtld() will provide for us. */ lda sp, -16(sp) subq s2, s3, a1 /* relocbase */ mov sp, a0 /* sp */ CALL(_rtld) /* v0 = _rtld(sp, relocbase); */ ldq a1, 0(sp) /* cleanup */ ldq a2, 8(sp) /* obj_main */ lda sp, 16(sp) /* pop stack */ mov sp, a0 /* stack pointer */ mov s0, a3 /* ps_strings */ mov v0, pv /* set up PV for entry point */ jsr ra, (v0), 0 /* (*_start)(sp, cleanup, obj, ps_strings); */ ldgp gp, 0(ra) CALL(exit) halt END(_rtld_start) #define RTLD_BIND_START_PROLOGUE \ /* at_reg already used by PLT code. */ \ .set noat ; \ \ /* \ * Allocate stack frame and preserve all registers that the \ * caller would have normally saved themselves. \ */ \ lda sp, -168(sp) ; \ stq ra, 0(sp) ; \ stq v0, 8(sp) ; \ stq t0, 16(sp) /* XXX t0-t7 necessary? */ ; \ stq t1, 24(sp) ; \ stq t2, 32(sp) ; \ stq t3, 40(sp) ; \ stq t4, 48(sp) ; \ stq t5, 56(sp) ; \ stq t6, 64(sp) ; \ stq t7, 72(sp) ; \ stq a0, 80(sp) ; \ stq a1, 88(sp) ; \ stq a2, 96(sp) ; \ stq a3, 104(sp) ; \ stq a4, 112(sp) ; \ stq a5, 120(sp) ; \ stq t8, 128(sp) /* XXX t8-t11 necessary? */ ; \ stq t9, 136(sp) ; \ stq t10, 144(sp) ; \ stq t11, 152(sp) ; \ stq gp, 160(sp) ; \ \ /* \ * Load our global pointer. Note, can't use pv, since it is \ * already used by the PLT code. \ */ \ br t0, 1f ; \ 1: LDGP(t0) #define RTLD_BIND_START_EPILOGUE(imb) \ /* Move the destination address into position. */ \ mov v0, pv ; \ \ /* Restore program registers. */ \ ldq ra, 0(sp) ; \ ldq v0, 8(sp) ; \ ldq t0, 16(sp) ; \ ldq t1, 24(sp) ; \ ldq t2, 32(sp) ; \ ldq t3, 40(sp) ; \ ldq t4, 48(sp) ; \ ldq t5, 56(sp) ; \ ldq t6, 64(sp) ; \ ldq t7, 72(sp) ; \ ldq a0, 80(sp) ; \ ldq a1, 88(sp) ; \ ldq a2, 96(sp) ; \ ldq a3, 104(sp) ; \ ldq a4, 112(sp) ; \ ldq a5, 120(sp) ; \ ldq t8, 128(sp) ; \ ldq t9, 136(sp) ; \ ldq t10, 144(sp) ; \ ldq t11, 152(sp) ; \ ldq gp, 160(sp) ; \ /* XXX LDGP? */ \ \ /* \ * We've patched the PLT; sync the I-stream. \ */ \ imb ; \ \ /* Pop the stack frame and turn control to the destination. */ \ lda sp, 168(sp) ; \ jmp zero, (pv) /* * _rtld_bind_start_secureplt(_rtld_bind_start_secureplt@@pv, obj@@at, * (sizeof(Elf_Rela)*index)@@t11) * * Lazy binding entry point, called via PLT with read-only * secureplt, when DT_ALPHA_PLTRO is set. The PLT itself looks * something like this: * * _PROCEDURE_LINKAGE_TABLE_: * subq pv, at, t11 // t11 := pv - ent0 = 4*index * s4subq t11, t11, t11 // t11 := 12*index * addq t11, t11, t11 // t11 := 24*index * // = sizeof(Elf_Rela)*index * ldah at, ...(at) // at := PLTGOT * lda at, ...(at) * ldq pv, 0(at) // pv := PLTGOT[0] * // = _rtld_bind_start_secureplt * ldq at, 8(at) // at := PLTGOT[1] * // = obj * jmp (pv) * 0: br at, _PROCEDURE_LINKAGE_TABLE_ // at := ent0 * ent0: br 0b // pv - ent0 = 0 = 4*index * ent1: br 0b // pv - ent0 = 4 = 4*index * ent2: br 0b // pv - ent0 = 8 = 4*index * ... */ NESTED_NOPROFILE(_rtld_bind_start_secureplt, 0, 168, ra, 0, 0) RTLD_BIND_START_PROLOGUE /* Set up the arguments for _rtld_bind. */ mov at_reg, a0 mov t11, a1 CALL(_rtld_bind) RTLD_BIND_START_EPILOGUE(/* no text writes, so no imb */) END(_rtld_bind_start_secureplt) /* * _rtld_bind_start(_rtld_bind_start@@pv, &PLTGOT[2]@@pv, * (ent0 + 4*(3*index + 1))@@at) * * Lazy binding entry point, called via PLT with read/write * non-secureplt, when DT_ALPHA_PLTRO is not set. The PLT itself * looks something like this at program startup, with PLTGOT (an * array of 64-bit Elf_Addr) pointing at _PROCEDURE_LINKAGE_TABLE_ * and PLTGOT[2] and PLTGOT[3] initialized by _rtld_setup_pltgot: * * _PROCEDURE_LINKAGE_TABLE_: * br pv, .Lref // pv := .Lref * .Lref: ldq pv, 12(pv) // pv := PLTGOT[2] * = _rtld_bind_start * unop // no-op for alignment * jmp pv, (pv) // pv := &PLTGOT[2] * .qword (_rtld_bind_start) // PLTGOT[2] * .qword (object pointer) // PLTGOT[3] * ent0: br at, _PROCEDURE_LINKAGE_TABLE_ * unop // space for adjusted stub * unop // space for adjusted stub * ent1: br at, _PROCEDURE_LINKAGE_TABLE_ * unop * unop * ent2: br at, _PROCEDURE_LINKAGE_TABLE_ * unop * unop * ... * * Note: Distance from &PLTGOT[2] (pv) to ent[0] + 4 (at) is 20 * bytes, and each ent[index] + 4 (at) after that is separated by * 3 instructions, i.e., 12 bytes. */ NESTED_NOPROFILE(_rtld_bind_start, 0, 168, ra, 0, 0) RTLD_BIND_START_PROLOGUE /* Set up the arguments for _rtld_bind. */ subq at_reg, pv, a1 /* calculate offset of reloc entry */ ldq a0, 8(pv) /* object structure */ subq a1, 20, a1 /* = (at - pv - 20) / 12 * 24 */ addq a1, a1, a1 CALL(_rtld_bind) RTLD_BIND_START_EPILOGUE(imb) END(_rtld_bind_start) /* * _rtld_bind_start_old(&PLTGOT[2]@@pv, (sizeof(Elf_Rela)*index)@@at) * * Lazy binding entry point, called via PLT. This version is for * the old PLT entry format, for which the PLT looks something * like this at program startup, with PLTGOT (an array of 64-bit * Elf_Addr) pointing at _PROCEDURE_LINKAGE_TABLE_, and PLTGOT[2] * and PLTGOT[3] initialized by _rtld_setup_pltgot: * * _PROCEDURE_LINKAGE_TABLE_: * br pv, 1f // pv := .Lref * .Lref: ldq pv, 12(pv) // pv := PLTGOT[2] * = _rtld_bind_start * unop // no-op for alignment * jmp pv, (pv) // pv := &PLTGOT[2] * .qword (_rtld_bind_start) // PLTGOT[2] * .qword (object pointer) // PLTGOT[3] * ent0: ldah at, 0 // at := 24*0 * lda at, 0(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ent1: ldah at, 0 // at := 24*1 * lda at, 24(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ent3: ldah at, 0 // at := 24*2 * lda at, 48(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ... */ NESTED_NOPROFILE(_rtld_bind_start_old, 0, 168, ra, 0, 0) RTLD_BIND_START_PROLOGUE /* Set up the arguments for _rtld_bind. */ ldq a0, 8(pv) /* object structure */ mov at_reg, a1 /* offset of reloc entry */ CALL(_rtld_bind) RTLD_BIND_START_EPILOGUE(imb) END(_rtld_bind_start_old) @ 1.16 log @Salvage the instruction to save the pointer to ps_strings for later use so that setproctitle() works again. The problem reported by Naoki Fukaumi on japanese mailing list. Approved by: Ross Harvey @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.15 2002/10/05 11:59:05 mycroft Exp $ */ d95 1 a95 1 stq t0, 16(sp) ; \ d109 1 a109 1 stq t8, 128(sp) ; \ d122 1 a122 1 #define RTLD_BIND_START_EPILOGUE \ d160 71 a230 1 * Lazy binding entry point, called via PLT. d244 1 a244 1 RTLD_BIND_START_EPILOGUE d249 26 a274 2 * Lazy binding entry point, called via PLT. This version is for the * old PLT entry format. d286 1 a286 1 RTLD_BIND_START_EPILOGUE @ 1.16.108.1 log @Sync with HEAD @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.17 2025/04/18 17:56:49 riastradh Exp $ */ d95 1 a95 1 stq t0, 16(sp) /* XXX t0-t7 necessary? */ ; \ d109 1 a109 1 stq t8, 128(sp) /* XXX t8-t11 necessary? */ ; \ d122 1 a122 1 #define RTLD_BIND_START_EPILOGUE(imb) \ d160 1 a160 71 * _rtld_bind_start_secureplt(_rtld_bind_start_secureplt@@pv, obj@@at, * (sizeof(Elf_Rela)*index)@@t11) * * Lazy binding entry point, called via PLT with read-only * secureplt, when DT_ALPHA_PLTRO is set. The PLT itself looks * something like this: * * _PROCEDURE_LINKAGE_TABLE_: * subq pv, at, t11 // t11 := pv - ent0 = 4*index * s4subq t11, t11, t11 // t11 := 12*index * addq t11, t11, t11 // t11 := 24*index * // = sizeof(Elf_Rela)*index * ldah at, ...(at) // at := PLTGOT * lda at, ...(at) * ldq pv, 0(at) // pv := PLTGOT[0] * // = _rtld_bind_start_secureplt * ldq at, 8(at) // at := PLTGOT[1] * // = obj * jmp (pv) * 0: br at, _PROCEDURE_LINKAGE_TABLE_ // at := ent0 * ent0: br 0b // pv - ent0 = 0 = 4*index * ent1: br 0b // pv - ent0 = 4 = 4*index * ent2: br 0b // pv - ent0 = 8 = 4*index * ... */ NESTED_NOPROFILE(_rtld_bind_start_secureplt, 0, 168, ra, 0, 0) RTLD_BIND_START_PROLOGUE /* Set up the arguments for _rtld_bind. */ mov at_reg, a0 mov t11, a1 CALL(_rtld_bind) RTLD_BIND_START_EPILOGUE(/* no text writes, so no imb */) END(_rtld_bind_start_secureplt) /* * _rtld_bind_start(_rtld_bind_start@@pv, &PLTGOT[2]@@pv, * (ent0 + 4*(3*index + 1))@@at) * * Lazy binding entry point, called via PLT with read/write * non-secureplt, when DT_ALPHA_PLTRO is not set. The PLT itself * looks something like this at program startup, with PLTGOT (an * array of 64-bit Elf_Addr) pointing at _PROCEDURE_LINKAGE_TABLE_ * and PLTGOT[2] and PLTGOT[3] initialized by _rtld_setup_pltgot: * * _PROCEDURE_LINKAGE_TABLE_: * br pv, .Lref // pv := .Lref * .Lref: ldq pv, 12(pv) // pv := PLTGOT[2] * = _rtld_bind_start * unop // no-op for alignment * jmp pv, (pv) // pv := &PLTGOT[2] * .qword (_rtld_bind_start) // PLTGOT[2] * .qword (object pointer) // PLTGOT[3] * ent0: br at, _PROCEDURE_LINKAGE_TABLE_ * unop // space for adjusted stub * unop // space for adjusted stub * ent1: br at, _PROCEDURE_LINKAGE_TABLE_ * unop * unop * ent2: br at, _PROCEDURE_LINKAGE_TABLE_ * unop * unop * ... * * Note: Distance from &PLTGOT[2] (pv) to ent[0] + 4 (at) is 20 * bytes, and each ent[index] + 4 (at) after that is separated by * 3 instructions, i.e., 12 bytes. d174 1 a174 1 RTLD_BIND_START_EPILOGUE(imb) d179 2 a180 26 * _rtld_bind_start_old(&PLTGOT[2]@@pv, (sizeof(Elf_Rela)*index)@@at) * * Lazy binding entry point, called via PLT. This version is for * the old PLT entry format, for which the PLT looks something * like this at program startup, with PLTGOT (an array of 64-bit * Elf_Addr) pointing at _PROCEDURE_LINKAGE_TABLE_, and PLTGOT[2] * and PLTGOT[3] initialized by _rtld_setup_pltgot: * * _PROCEDURE_LINKAGE_TABLE_: * br pv, 1f // pv := .Lref * .Lref: ldq pv, 12(pv) // pv := PLTGOT[2] * = _rtld_bind_start * unop // no-op for alignment * jmp pv, (pv) // pv := &PLTGOT[2] * .qword (_rtld_bind_start) // PLTGOT[2] * .qword (object pointer) // PLTGOT[3] * ent0: ldah at, 0 // at := 24*0 * lda at, 0(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ent1: ldah at, 0 // at := 24*1 * lda at, 24(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ent3: ldah at, 0 // at := 24*2 * lda at, 48(at) // = sizeof(Elf_Rela)*index * br _PROCEDURE_LINKAGE_TABLE_ * ... d192 1 a192 1 RTLD_BIND_START_EPILOGUE(imb) @ 1.15 log @Minor cleanup. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.14 2002/09/12 17:18:37 mycroft Exp $ */ d52 3 @ 1.14 log @Update comments. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.13 2002/09/12 17:07:25 mycroft Exp $ */ d5 1 a5 1 * Portions copyright 2002 Charles M. Hannum. @ 1.13 log @Pass the calculated relocation offset down to _rtld(). @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.12 2002/09/11 20:56:09 mycroft Exp $ */ d5 1 @ 1.12 log @We don't use _GLOBAL_OFFSET_TABLE_ any more, so don't .global it. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.11 2002/09/11 18:18:37 mycroft Exp $ */ d44 2 a45 3 br t2, 2f /* get our PC */ 2: ldiq t3, 2b /* get where the linker thought we were */ subq t2, t3, a1 /* calculate the displacement */ d47 1 d49 1 a49 1 addq a1, t5, a0 /* add the displacement */ d60 3 a62 2 mov sp, a0 /* v0 = _rtld(sp); */ CALL(_rtld) @ 1.11 log @Implement _rtld_relocate_nonplt_self() on Alpha. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.10 2002/09/08 02:48:28 thorpej Exp $ */ a30 2 .extern _GLOBAL_OFFSET_TABLE_ @ 1.10 log @Fix a serious performance problem for large programs on the Alpha. Large programs need multiple GOTs. The lazy binding stub in the PLT can be reached from any of these GOTs, but the dynamic linker only has enough information to fix up the first GOT entry. Thus, calls through the other GOTs went through the time-consuming lazy binding process on every call. This fix rewrites the PLT entries themselves to bypass the lazy binding for those GOT entries that the dynamic linker can't fixup. Fix from FreeBSD. Note that now that we patch up the PLT, we need to put back the "imb" that was removed from the binder exit path. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.8 2001/12/14 21:25:23 thorpej Exp $ */ a32 1 .extern _GOT_END_ d43 3 a45 4 /* XXX Partially relocate ourself. */ /* Step 1 -- Figure out the displacement */ d48 1 a48 9 subq t2, t3, t8 /* calculate the displacement */ /* Step 2 -- Find bounds of global offset table */ lda t5, _GLOBAL_OFFSET_TABLE_ addq t8, t5, t9 /* add the displacement */ lda t4, _GOT_END_ /* Get the address of the end of the GOT */ addq t8, t4, t10 /* add the displacement */ d50 2 a51 15 /* * Step 3 -- Every entry in the global offset table needs to * modified for the displacement before any code will work. */ 3: ldq t1, 0(t9) /* load the value */ addq t8, t1, t1 /* add the displacement */ stq t1, 0(t9) /* save the new value */ lda t9, 8(t9) /* point to next entry */ cmpult t9, t10, t1 /* are we done? */ bne t1, 3b /* no, do more */ /* * Ya! Things are far enough so we can do some dynamic linking! */ d53 2 a54 2 /* Squirrel away ps_strings. */ mov a3, s0 @ 1.9 log @There is no need to do an imb after each call to the binder, because we only patch the GOT, not the PLT. However, do an imb when setting up the PLT thunk, just in case. @ text @d170 5 @ 1.8 log @Garbage-collect the OLD_GOT stuff. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.7 2001/12/13 22:34:52 thorpej Exp $ */ a168 5 \ /* \ * We've patched the PLT; sync the I-stream. \ */ \ imb ; \ @ 1.8.2.1 log @Pull up revision 1.9 (requested by thorpej in ticket #774): There is no need to do an imb after each call to the binder, because we only patch the GOT, not the PLT. However, do an imb when setting up the PLT thunk, just in case. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.8 2001/12/14 21:25:23 thorpej Exp $ */ d169 5 @ 1.8.2.2 log @Apply patch (request by skrll in ticket #1702): Bring "ld.elf_so" (mostly) in sync with NetBSD-current: - MI and MD (e.g. under NetBSD-alpha) performance improvements - RTLD_SELF, RTLD_NEXT, RTLD_DEFAULT support - much better structured code - closes PR bin/25464 @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.8.2.1 2002/11/30 14:22:19 he Exp $ */ a4 1 * Portions copyright 2002 Charles M. Hannum d32 3 d44 16 d61 2 a62 1 * Relocate ourself. a63 2 br s2, 2f /* get our PC */ 2: ldiq s3, 2b /* get where the linker thought we were */ d65 10 a74 3 subq s2, s3, a1 /* relocbase */ lda t5, _DYNAMIC addq a1, t5, a0 /* &_DYNAMIC */ a78 3 bsr ra, _rtld_relocate_nonplt_self LDGP(ra) d85 2 a86 3 subq s2, s3, a1 /* relocbase */ mov sp, a0 /* sp */ CALL(_rtld) /* v0 = _rtld(sp, relocbase); */ a169 5 /* \ * We've patched the PLT; sync the I-stream. \ */ \ imb ; \ \ @ 1.7 log @Supply two lazy binding routines for Alpha: one that works with the old PLT format, and one that works with the new. XXX We currently always use _rtld_bind_start_old() in _rtld_setup_alpha_pltgot(). We need to add code to peek into one of the PLT entries to see which format it's in and pick the correct binding routine. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.6 2001/12/13 21:34:04 thorpej Exp $ */ a56 3 #if defined(OLD_GOT) ldq t4, 0(t9) /* Get the address of dynamic table */ #else a57 1 #endif @ 1.6 log @Use numeric labels. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.5 2001/12/13 20:30:48 thorpej Exp $ */ d108 75 a186 2 /* at_reg already used by PLT code. */ .set noat d188 1 a188 33 /* * Allocate stack frame and preserve all registers that the caller * would have normally saved themselves. */ lda sp, -168(sp) stq ra, 0(sp) stq v0, 8(sp) stq t0, 16(sp) stq t1, 24(sp) stq t2, 32(sp) stq t3, 40(sp) stq t4, 48(sp) stq t5, 56(sp) stq t6, 64(sp) stq t7, 72(sp) stq a0, 80(sp) stq a1, 88(sp) stq a2, 96(sp) stq a3, 104(sp) stq a4, 112(sp) stq a5, 120(sp) stq t8, 128(sp) stq t9, 136(sp) stq t10, 144(sp) stq t11, 152(sp) stq gp, 160(sp) /* * Load our global pointer. Note, can't use pv, since it is * already used by the PLT code. */ br t0, 1f 1: LDGP(t0) a190 1 #ifdef NEW_PLT_FORMAT d195 16 a210 1 #else d213 1 a213 1 #endif /* NEW_PLT_FORMAT */ d216 1 a216 26 /* Move the destination address into position. */ mov v0, pv /* Restore program registers. */ ldq ra, 0(sp) ldq v0, 8(sp) ldq t0, 16(sp) ldq t1, 24(sp) ldq t2, 32(sp) ldq t3, 40(sp) ldq t4, 48(sp) ldq t5, 56(sp) ldq t6, 64(sp) ldq t7, 72(sp) ldq a0, 80(sp) ldq a1, 88(sp) ldq a2, 96(sp) ldq a3, 104(sp) ldq a4, 112(sp) ldq a5, 120(sp) ldq t8, 128(sp) ldq t9, 136(sp) ldq t10, 144(sp) ldq t11, 152(sp) ldq gp, 160(sp) /* XXX LDGP? */ d218 1 a218 9 /* * We've patched the PLT; sync the I-stream. */ imb /* Pop the stack frame and turn control to the destination. */ lda sp, 168(sp) jmp zero, (pv) END(_rtld_bind_start) @ 1.5 log @* Add a linker script which provides a _GOT_END_ symbol that we can use to find the end of the GOT, rather than relying on _DYNAMIC to immediately follow the GOT. (A change in current binutils moved _DYNAMIC, and thus would have broken our Alpha ld.elf_so). * Add #ifdef'd out code to deal with the new PLT format. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.4 2001/05/28 06:10:20 nathanw Exp $ */ d41 2 a42 2 br pv, L1 L1: LDGP(pv) d48 2 a49 2 br t2, L2 /* get our PC */ L2: ldiq t3, L2 /* get where the linker thought we were */ d69 1 a69 1 L3: ldq t1, 0(t9) /* load the value */ d74 1 a74 1 bne t1, L3 /* no, do more */ d146 2 a147 2 br t0, L100 L100: LDGP(t0) @ 1.4 log @Correct spelling in a comment. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.3 1999/04/19 00:05:00 thorpej Exp $ */ d33 1 d60 1 a60 1 lda t4, _DYNAMIC d150 6 d158 1 @ 1.3 log @Simplify _rtld_start() a little, and shave some cycles. Spefically, there's no need to save the stack pointer. Just push the space for the cleanup and obj_main pointers before calling _rtld(), and pop it after loading those pointers into the appropriate argument registers for the program entry point. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.2 1999/04/18 23:12:59 thorpej Exp $ */ d79 1 a79 1 /* Sqirrel away ps_strings. */ @ 1.3.8.1 log @Pull up revision 1.4 (requested by skrll): Add init/fini section support in crtbegin and crtend, and introduce support for DWARF2 exception handling. Fixes PR#12865, PR#13488, PR#13489, and PR#13491. Also fix ld.elf_so to deal appropriately. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.3 1999/04/19 00:05:00 thorpej Exp $ */ d79 1 a79 1 /* Squirrel away ps_strings. */ @ 1.2 log @Tidy this up a little. @ text @d1 1 a1 1 /* $NetBSD: rtld_start.S,v 1.1 1996/12/16 20:38:09 cgd Exp $ */ a42 14 /* * Save the stack pointer. This is what we will pass to _rtld(). */ lda s0, 0(sp) /* * Make room for the atexit and cleanup vectors that _rtld() will * provide to us. */ lda sp, -16(sp) /* Save ps_strings pointer */ mov a3, s1 d76 1 a76 1 * Ya! Things are far enough so we can do some dynamic linking! d79 20 a98 2 lda a0, -16(s0) CALL(_rtld) /* v0 = _rtld(sp); */ a99 6 ldq a1, -16(s0) /* our atexit function */ ldq a2, -8(s0) /* obj_main entry */ lda sp, 16(sp) /* readjust our stack */ mov s0, a0 /* stack pointer */ mov s1, a3 /* ps_strings pointer */ mov v0, t12 @ 1.1 log @First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf kit, then hacked on by Matt Thomas , then by me (to make it work with new versions of the toolchain, etc.). This runs, but it's in serious need of cleaning and/or a fair bit of reworking. See the README file for more information, and a list of things to do. @ text @d1 1 a1 1 /* $NetBSD$ */ d32 1 a32 1 .extern _GLOBAL_OFFSET_TABLE_ d34 5 a38 1 LEAF(_rtld_start, 0) /* XXX */ d40 2 a41 2 br pv, $33 $33: LDGP(pv) d43 4 a46 1 /* save away the stack pointer */ d48 4 a51 1 lda s0, 0(sp) /* get argc from stack */ d54 1 a54 1 /* save ps_strings pointer */ d57 2 d61 2 a62 2 br t2, $34 /* get our PC */ $34: ldiq t3, $34 /* get where the linker thought we were */ d82 1 a82 1 $35: ldq t1, 0(t9) /* load the value */ d87 1 a87 1 bne t1, $35 /* no, do more */ d102 1 a102 1 jsr ra, (v0), 0 /* (*_start)(sp, cleanup, obj); */ d109 5 d115 35 a149 33 .globl _rtld_bind_start .ent _rtld_bind_start _rtld_bind_start: lda sp, -168(sp) .frame sp, 168, $26 /* Preserve all registers that C normally doesn't. */ stq $26, 0(sp) stq $0, 8(sp) stq $1, 16(sp) stq $2, 24(sp) stq $3, 32(sp) stq $4, 40(sp) stq $5, 48(sp) stq $6, 56(sp) stq $7, 64(sp) stq $8, 72(sp) stq $16, 80(sp) stq $17, 88(sp) stq $18, 96(sp) stq $19, 104(sp) stq $20, 112(sp) stq $21, 120(sp) stq $22, 128(sp) stq $23, 136(sp) stq $24, 144(sp) stq $25, 152(sp) stq $29, 160(sp) .mask 0x27ff01ff, -168 /* Set up our $gp */ br gp, $100 $100: ldgp gp, 0(gp) .prologue 1 d151 1 a151 1 ldq a0, 8(t12) /* object structure */ d155 2 a156 31 /* Move the destination address into position. */ mov $0, $27 /* Restore program registers. */ ldq $26, 0(sp) ldq $0, 8(sp) ldq $1, 16(sp) ldq $2, 24(sp) ldq $3, 32(sp) ldq $4, 40(sp) ldq $5, 48(sp) ldq $6, 56(sp) ldq $7, 64(sp) ldq $8, 72(sp) ldq $16, 80(sp) ldq $17, 88(sp) ldq $18, 96(sp) ldq $19, 104(sp) ldq $20, 112(sp) ldq $21, 120(sp) ldq $22, 128(sp) ldq $23, 136(sp) ldq $24, 144(sp) ldq $25, 152(sp) ldq $29, 160(sp) /* Flush the Icache after having modified the .plt code. */ imb /* Clean up and turn control to the destination */ lda sp, 168(sp) jmp $31, ($27) .end _rtld_bind_start d158 23 d182 4 d187 4 @