/* $OpenBSD: ldasm.S,v 1.25 2014/07/14 03:54:51 deraadt Exp $ */ /* * Copyright (c) 2001 Jason L. Wright (jason@thought.net) * 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. * * 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. */ /*- * Copyright (c) 2000 Eduardo Horvath. * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas and Paul Kranenburg. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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 #include #include #define DL_DATA_SIZE (16*4) #define ARGC 96 .section ".text" .align 4 .global _dl_start .type _dl_start,@function _dl_start: sub %g0, %g0, %fp ! clear frame sub %sp, 32 + DL_DATA_SIZE, %sp ! make room for dl_data add %sp, ARGC, %l3 add %l3, DL_DATA_SIZE, %o0 mov %o0, %l0 /* * need to figure out where _DYNAMIC is located newer binutils * does not fill in GOT to read _DYNAMIC before relocation. */ call 0f nop call _DYNAMIC+8 ! not executed (no delay needed) 0: ld [%o7+8], %o2 ! load stub call instruction sll %o2, 2, %o2 ! extract PC offset sra %o2, 0, %o2 ! sign-extend add %o2, %o7, %o2 ! real &_DYNAMIC call _dl_boot_bind ! _dl_boot_bind(sp,dl_data,dynamicp) mov %l3, %o1 mov %l3, %o3 ld [%l0], %l3 ! argc = *sp sll %l3, 2, %l3 ! argc *= sizeof(long) add %l0, 4, %o0 ! argv = [sp + argc] add %l0, 8, %o1 ! envp = sp + 8 + add %o1, %l3, %o1 ! + argc add %o3, (7*4), %l2 ld [%l2], %o2 ! loff = dl_data[AUX_base]; call _dl_boot ! _dl_boot(argv,envp,loff,dl_data) nop add %sp, 32 + DL_DATA_SIZE, %sp ! restore stack 1: call 2f sethi %hi(_GLOBAL_OFFSET_TABLE_+(.-1b)), %l7 2: or %l7, %lo(_GLOBAL_OFFSET_TABLE_+(.-1b)), %l7 add %l7, %o7, %l7 jmp %o0 ld [%l7 + _dl_dtors], %g1 ! %g1 = cleanup .section ".text" .align 4 .global _dl_bind_start .type _dl_bind_start,@function _dl_bind_start: # (obj, reloff) save %sp, -96, %sp /* setup standard stack frame */ ld [%i7 + 8], %o0 /* obj id is in second PLT slot */ srl %g1, 10, %o1 /* offset is in high 22 bits */ call _dl_bind /* Call _rtld_bind(obj, offset) */ sub %o1, 12*4, %o1 /* first 4 `pltrel' entries missing! */ mov %o0, %g1 /* return value == function address */ restore /* get rid of our context */ jmp %g1 /* and the jmpslot context, then go. */ restore .section ".text" .align 4 .global _dl_close .type _dl_close,@function _dl_close: mov SYS_close | SYSCALL_G2RFLAG, %g1 ! call sys_close add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_exit .type _dl_exit,@function _dl_exit: mov SYS_exit | SYSCALL_G2RFLAG, %g1 ! call sys_exit add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_issetugid .type _dl_issetugid,@function _dl_issetugid: mov SYS_issetugid | SYSCALL_G2RFLAG, %g1 ! call sys_issetugid add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl__syscall .type _dl__syscall,@function _dl__syscall: mov SYS___syscall | SYSCALL_G2RFLAG, %g1 ! call sys_syscall add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_munmap .type _dl_munmap,@function _dl_munmap: mov SYS_munmap | SYSCALL_G2RFLAG, %g1 ! calling sys_munmap add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_mprotect .type _dl_mprotect,@function _dl_mprotect: mov SYS_mprotect | SYSCALL_G2RFLAG, %g1 ! calling sys_mprotect add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_open .type _dl_open,@function _dl_open: mov SYS_open | SYSCALL_G2RFLAG, %g1 ! calling sys_open add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_read .type _dl_read,@function _dl_read: mov SYS_read | SYSCALL_G2RFLAG, %g1 ! calling sys_read add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_write .type _dl_write,@function _dl_write: mov SYS_write | SYSCALL_G2RFLAG, %g1 ! calling sys_write add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .globl _dl_fstat .type _dl_fstat,@function _dl_fstat: mov SYS_fstat | SYSCALL_G2RFLAG, %g1 ! call sys_fstat add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .globl _dl_getdents .type _dl_getdents,@function _dl_getdents: mov SYS_getdents | SYSCALL_G2RFLAG, %g1 ! call sys_getdents add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .globl _dl_sysctl .type _dl_sysctl,@function _dl_sysctl: mov SYS___sysctl | SYSCALL_G2RFLAG, %g1 ! call sys___sysctl add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno /* _dl_sigprocmask does not support NULL new mask */ .section ".text" .align 4 .globl _dl_sigprocmask .type _dl_sigprocmask,@function _dl_sigprocmask: ld [%o1], %o1 mov SYS_sigprocmask, %g1 ! call sys___sigprocmask t ST_SYSCALL ! off to wonderland cmp %o2, 0 bne,a 1f st %o0, [%o2] 1: retl clr %o0 .section ".text" .align 4 .global _dl_gettimeofday .type _dl_gettimeofday,@function _dl_gettimeofday: mov SYS_gettimeofday | SYSCALL_G2RFLAG, %g1 ! calling sys_gettimeofday add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_readlink .type _dl_readlink,@function _dl_readlink: mov SYS_readlink | SYSCALL_G2RFLAG, %g1 ! calling sys_readlink add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_lstat .type _dl_lstat,@function _dl_lstat: mov SYS_lstat | SYSCALL_G2RFLAG, %g1 ! calling sys_lstat add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_getcwd .type _dl_getcwd,@function _dl_getcwd: mov SYS___getcwd | SYSCALL_G2RFLAG, %g1 ! calling sys_getcwd add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_utrace .type _dl_utrace,@function _dl_utrace: mov SYS_utrace | SYSCALL_G2RFLAG, %g1 ! calling sys_utrace add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_getentropy .type _dl_getentropy,@function _dl_getentropy: mov SYS_getentropy | SYSCALL_G2RFLAG, %g1 ! calling sys_getentropy add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno .section ".text" .align 4 .global _dl_sendsyslog .type _dl_sendsyslog,@function _dl_sendsyslog: mov SYS_sendsyslog | SYSCALL_G2RFLAG, %g1 ! calling sys_sendsyslog add %o7, 8, %g2 ! just return on success t ST_SYSCALL ! off to wonderland retl sub %g0, %o0, %o0 ! error: result = -errno /* * V8 sparc .{,u}{mul,div,rem} replacements. * We try to mimic them 100%. Full 64 bit sources or outputs, and * these routines are required to update the condition codes. */ .globl _C_LABEL(_mulreplace), _C_LABEL(_mulreplace_end) _C_LABEL(_mulreplace): smulcc %o0, %o1, %o0 retl rd %y, %o1 _C_LABEL(_mulreplace_end): .globl _C_LABEL(_umulreplace), _C_LABEL(_umulreplace_end) _C_LABEL(_umulreplace): umulcc %o0, %o1, %o0 retl rd %y, %o1 _C_LABEL(_umulreplace_end): .globl _C_LABEL(_divreplace), _C_LABEL(_divreplace_end) _C_LABEL(_divreplace): sra %o0, 31, %g1 wr %g1, 0, %y nop nop nop retl sdivcc %o0, %o1, %o0 _C_LABEL(_divreplace_end): .globl _C_LABEL(_udivreplace), _C_LABEL(_udivreplace_end) _C_LABEL(_udivreplace): wr %g0, 0, %y nop nop nop retl udivcc %o0, %o1, %o0 _C_LABEL(_udivreplace_end): .globl _C_LABEL(_remreplace), _C_LABEL(_remreplace_end) _C_LABEL(_remreplace): sra %o0, 31, %g1 wr %g1, 0, %y nop nop nop sdiv %o0, %o1, %o2 smul %o1, %o2, %o2 retl subcc %o0, %o2, %o0 _C_LABEL(_remreplace_end): .globl _C_LABEL(_uremreplace), _C_LABEL(_uremreplace_end) _C_LABEL(_uremreplace): wr %g0, 0, %y nop nop nop udiv %o0, %o1, %o2 umul %o1, %o2, %o2 retl subcc %o0, %o2, %o0 _C_LABEL(_uremreplace_end):