Add support for RISC-V architecture.
Reviewed by: andrew, kib Sponsored by: DARPA, AFRL Sponsored by: HEIF5 Differential Revision: https://reviews.freebsd.org/D4679
This commit is contained in:
parent
a46709e2ab
commit
4b1859c0e9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=292691
400
libexec/rtld-elf/riscv/reloc.c
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400
libexec/rtld-elf/riscv/reloc.c
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@ -0,0 +1,400 @@
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/*-
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* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* This software was developed by the University of Cambridge Computer
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* Laboratory as part of the CTSRD Project, with support from the UK Higher
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* Education Innovation Fund (HEIF).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <stdlib.h>
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#include "debug.h"
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#include "rtld.h"
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#include "rtld_printf.h"
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/*
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* It is possible for the compiler to emit relocations for unaligned data.
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* We handle this situation with these inlines.
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*/
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#define RELOC_ALIGNED_P(x) \
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(((uintptr_t)(x) & (sizeof(void *) - 1)) == 0)
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void _exit(int);
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uint64_t
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set_gp(Obj_Entry *obj)
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{
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uint64_t old;
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SymLook req;
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uint64_t gp;
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int res;
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__asm __volatile("mv %0, gp" : "=r"(old));
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symlook_init(&req, "_gp");
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req.ventry = NULL;
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req.flags = SYMLOOK_EARLY;
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res = symlook_obj(&req, obj);
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if (res == 0) {
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gp = req.sym_out->st_value;
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__asm __volatile("mv gp, %0" :: "r"(gp));
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}
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return (old);
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}
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void
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init_pltgot(Obj_Entry *obj)
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{
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if (obj->pltgot != NULL) {
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obj->pltgot[0] = (Elf_Addr)&_rtld_bind_start;
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obj->pltgot[1] = (Elf_Addr)obj;
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}
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}
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int
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do_copy_relocations(Obj_Entry *dstobj)
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{
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const Obj_Entry *srcobj, *defobj;
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const Elf_Rela *relalim;
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const Elf_Rela *rela;
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const Elf_Sym *srcsym;
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const Elf_Sym *dstsym;
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const void *srcaddr;
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const char *name;
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void *dstaddr;
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SymLook req;
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size_t size;
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int res;
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/*
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* COPY relocs are invalid outside of the main program
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*/
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assert(dstobj->mainprog);
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relalim = (const Elf_Rela *)((char *)dstobj->rela +
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dstobj->relasize);
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for (rela = dstobj->rela; rela < relalim; rela++) {
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if (ELF_R_TYPE(rela->r_info) != R_RISCV_COPY)
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continue;
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dstaddr = (void *)(dstobj->relocbase + rela->r_offset);
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dstsym = dstobj->symtab + ELF_R_SYM(rela->r_info);
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name = dstobj->strtab + dstsym->st_name;
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size = dstsym->st_size;
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symlook_init(&req, name);
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req.ventry = fetch_ventry(dstobj, ELF_R_SYM(rela->r_info));
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req.flags = SYMLOOK_EARLY;
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for (srcobj = dstobj->next; srcobj != NULL;
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srcobj = srcobj->next) {
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res = symlook_obj(&req, srcobj);
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if (res == 0) {
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srcsym = req.sym_out;
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defobj = req.defobj_out;
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break;
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}
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}
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if (srcobj == NULL) {
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_rtld_error(
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"Undefined symbol \"%s\" referenced from COPY relocation in %s",
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name, dstobj->path);
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return (-1);
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}
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srcaddr = (const void *)(defobj->relocbase + srcsym->st_value);
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memcpy(dstaddr, srcaddr, size);
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}
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return (0);
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}
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/*
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* Process the PLT relocations.
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*/
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int
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reloc_plt(Obj_Entry *obj)
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{
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const Elf_Rela *relalim;
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const Elf_Rela *rela;
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relalim = (const Elf_Rela *)((char *)obj->pltrela + obj->pltrelasize);
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for (rela = obj->pltrela; rela < relalim; rela++) {
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Elf_Addr *where;
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assert(ELF_R_TYPE(rela->r_info) == R_RISCV_JUMP_SLOT);
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where = (Elf_Addr *)(obj->relocbase + rela->r_offset);
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*where += (Elf_Addr)obj->relocbase;
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}
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return (0);
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}
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/*
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* LD_BIND_NOW was set - force relocation for all jump slots
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*/
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int
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reloc_jmpslots(Obj_Entry *obj, int flags, RtldLockState *lockstate)
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{
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const Obj_Entry *defobj;
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const Elf_Rela *relalim;
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const Elf_Rela *rela;
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const Elf_Sym *def;
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relalim = (const Elf_Rela *)((char *)obj->pltrela + obj->pltrelasize);
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for (rela = obj->pltrela; rela < relalim; rela++) {
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Elf_Addr *where;
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where = (Elf_Addr *)(obj->relocbase + rela->r_offset);
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switch(ELF_R_TYPE(rela->r_info)) {
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case R_RISCV_JUMP_SLOT:
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def = find_symdef(ELF_R_SYM(rela->r_info), obj,
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&defobj, SYMLOOK_IN_PLT | flags, NULL, lockstate);
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if (def == NULL) {
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dbg("reloc_jmpslots: sym not found");
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return (-1);
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}
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*where = (Elf_Addr)(defobj->relocbase + def->st_value);
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break;
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default:
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_rtld_error("Unknown relocation type %x in jmpslot",
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(unsigned int)ELF_R_TYPE(rela->r_info));
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return (-1);
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}
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}
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return (0);
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}
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int
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reloc_iresolve(Obj_Entry *obj, struct Struct_RtldLockState *lockstate)
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{
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/* XXX not implemented */
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return (0);
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}
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int
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reloc_gnu_ifunc(Obj_Entry *obj, int flags,
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struct Struct_RtldLockState *lockstate)
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{
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/* XXX not implemented */
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return (0);
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}
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Elf_Addr
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reloc_jmpslot(Elf_Addr *where, Elf_Addr target, const Obj_Entry *defobj,
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const Obj_Entry *obj, const Elf_Rel *rel)
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{
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assert(ELF_R_TYPE(rel->r_info) == R_RISCV_JUMP_SLOT);
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if (*where != target)
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*where = target;
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return target;
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}
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/*
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* Process non-PLT relocations
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*/
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int
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reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld, int flags,
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RtldLockState *lockstate)
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{
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const Obj_Entry *defobj;
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const Elf_Rela *relalim;
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const Elf_Rela *rela;
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const Elf_Sym *def;
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SymCache *cache;
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Elf_Addr *where;
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unsigned long symnum;
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if ((flags & SYMLOOK_IFUNC) != 0)
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/* XXX not implemented */
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return (0);
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/*
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* The dynamic loader may be called from a thread, we have
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* limited amounts of stack available so we cannot use alloca().
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*/
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if (obj == obj_rtld)
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cache = NULL;
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else
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cache = calloc(obj->dynsymcount, sizeof(SymCache));
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/* No need to check for NULL here */
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relalim = (const Elf_Rela *)((caddr_t)obj->rela + obj->relasize);
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for (rela = obj->rela; rela < relalim; rela++) {
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where = (Elf_Addr *)(obj->relocbase + rela->r_offset);
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symnum = ELF_R_SYM(rela->r_info);
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switch (ELF_R_TYPE(rela->r_info)) {
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case R_RISCV_JUMP_SLOT:
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/* This will be handled by the plt/jmpslot routines */
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break;
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case R_RISCV_NONE:
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break;
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case R_RISCV_64:
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def = find_symdef(symnum, obj, &defobj, flags, cache,
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lockstate);
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if (def == NULL)
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return (-1);
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*where = (Elf_Addr)(defobj->relocbase + def->st_value +
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rela->r_addend);
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break;
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case R_RISCV_TLS_DTPMOD64:
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def = find_symdef(symnum, obj, &defobj, flags, cache,
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lockstate);
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if (def == NULL)
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return -1;
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*where += (Elf_Addr)defobj->tlsindex;
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break;
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case R_RISCV_COPY:
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/*
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* These are deferred until all other relocations have
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* been done. All we do here is make sure that the
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* COPY relocation is not in a shared library. They
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* are allowed only in executable files.
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*/
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if (!obj->mainprog) {
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_rtld_error("%s: Unexpected R_RISCV_COPY "
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"relocation in shared library", obj->path);
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return (-1);
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}
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break;
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case R_RISCV_TLS_DTPREL64:
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def = find_symdef(symnum, obj, &defobj, flags, cache,
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lockstate);
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if (def == NULL)
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return (-1);
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|
/*
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||||||
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* We lazily allocate offsets for static TLS as we
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* see the first relocation that references the
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* TLS block. This allows us to support (small
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||||||
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* amounts of) static TLS in dynamically loaded
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* modules. If we run out of space, we generate an
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* error.
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||||||
|
*/
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|
if (!defobj->tls_done) {
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|
if (!allocate_tls_offset((Obj_Entry*) defobj)) {
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_rtld_error(
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"%s: No space available for static "
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||||||
|
"Thread Local Storage", obj->path);
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||||||
|
return (-1);
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||||||
|
}
|
||||||
|
}
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||||||
|
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||||||
|
*where += (Elf_Addr)(def->st_value + rela->r_addend
|
||||||
|
- TLS_DTV_OFFSET);
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||||||
|
break;
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||||||
|
case R_RISCV_TLS_TPREL64:
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||||||
|
def = find_symdef(symnum, obj, &defobj, flags, cache,
|
||||||
|
lockstate);
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||||||
|
if (def == NULL)
|
||||||
|
return (-1);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We lazily allocate offsets for static TLS as we
|
||||||
|
* see the first relocation that references the
|
||||||
|
* TLS block. This allows us to support (small
|
||||||
|
* amounts of) static TLS in dynamically loaded
|
||||||
|
* modules. If we run out of space, we generate an
|
||||||
|
* error.
|
||||||
|
*/
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||||||
|
if (!defobj->tls_done) {
|
||||||
|
if (!allocate_tls_offset((Obj_Entry*) defobj)) {
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||||||
|
_rtld_error(
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||||||
|
"%s: No space available for static "
|
||||||
|
"Thread Local Storage", obj->path);
|
||||||
|
return (-1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
*where = (def->st_value + rela->r_addend +
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||||||
|
defobj->tlsoffset - TLS_TP_OFFSET);
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||||||
|
break;
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||||||
|
case R_RISCV_RELATIVE:
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||||||
|
*where = (Elf_Addr)(obj->relocbase + rela->r_addend);
|
||||||
|
break;
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||||||
|
default:
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||||||
|
rtld_printf("%s: Unhandled relocation %lu\n",
|
||||||
|
obj->path, ELF_R_TYPE(rela->r_info));
|
||||||
|
return (-1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
allocate_initial_tls(Obj_Entry *objs)
|
||||||
|
{
|
||||||
|
Elf_Addr **tp;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Fix the size of the static TLS block by using the maximum
|
||||||
|
* offset allocated so far and adding a bit for dynamic modules to
|
||||||
|
* use.
|
||||||
|
*/
|
||||||
|
tls_static_space = tls_last_offset + tls_last_size +
|
||||||
|
RTLD_STATIC_TLS_EXTRA;
|
||||||
|
|
||||||
|
tp = (Elf_Addr **) ((char *)allocate_tls(objs, NULL, TLS_TCB_SIZE, 16)
|
||||||
|
+ TLS_TP_OFFSET + TLS_TCB_SIZE);
|
||||||
|
|
||||||
|
__asm __volatile("mv tp, %0" :: "r"(tp));
|
||||||
|
}
|
||||||
|
|
||||||
|
void *
|
||||||
|
__tls_get_addr(tls_index* ti)
|
||||||
|
{
|
||||||
|
char *_tp;
|
||||||
|
void *p;
|
||||||
|
|
||||||
|
__asm __volatile("mv %0, tp" : "=r" (_tp));
|
||||||
|
|
||||||
|
p = tls_get_addr_common((Elf_Addr**)((Elf_Addr)_tp - TLS_TP_OFFSET
|
||||||
|
- TLS_TCB_SIZE), ti->ti_module, ti->ti_offset);
|
||||||
|
|
||||||
|
return (p + TLS_DTV_OFFSET);
|
||||||
|
}
|
111
libexec/rtld-elf/riscv/rtld_machdep.h
Normal file
111
libexec/rtld-elf/riscv/rtld_machdep.h
Normal file
@ -0,0 +1,111 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 1999, 2000 John D. Polstra.
|
||||||
|
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Portions of this software were developed by SRI International and the
|
||||||
|
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
|
||||||
|
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
|
||||||
|
*
|
||||||
|
* Portions of this software were developed by the University of Cambridge
|
||||||
|
* Computer Laboratory as part of the CTSRD Project, with support from the
|
||||||
|
* UK Higher Education Innovation Fund (HEIF).
|
||||||
|
*
|
||||||
|
* 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 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 AUTHOR 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.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef RTLD_MACHDEP_H
|
||||||
|
#define RTLD_MACHDEP_H 1
|
||||||
|
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <machine/atomic.h>
|
||||||
|
|
||||||
|
struct Struct_Obj_Entry;
|
||||||
|
|
||||||
|
uint64_t set_gp(struct Struct_Obj_Entry *obj);
|
||||||
|
|
||||||
|
/* Return the address of the .dynamic section in the dynamic linker. */
|
||||||
|
#define rtld_dynamic(obj) \
|
||||||
|
({ \
|
||||||
|
Elf_Addr _dynamic_addr; \
|
||||||
|
__asm __volatile("lla %0, _DYNAMIC" : "=r"(_dynamic_addr)); \
|
||||||
|
(const Elf_Dyn *)_dynamic_addr; \
|
||||||
|
})
|
||||||
|
#define RTLD_IS_DYNAMIC() (1)
|
||||||
|
|
||||||
|
Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
|
||||||
|
const struct Struct_Obj_Entry *defobj,
|
||||||
|
const struct Struct_Obj_Entry *obj,
|
||||||
|
const Elf_Rel *rel);
|
||||||
|
|
||||||
|
#define make_function_pointer(def, defobj) \
|
||||||
|
((defobj)->relocbase + (def)->st_value)
|
||||||
|
|
||||||
|
#define call_initfini_pointer(obj, target) \
|
||||||
|
({ \
|
||||||
|
uint64_t old0; \
|
||||||
|
old0 = set_gp(obj); \
|
||||||
|
(((InitFunc)(target))()); \
|
||||||
|
__asm __volatile("mv gp, %0" :: "r"(old0)); \
|
||||||
|
})
|
||||||
|
|
||||||
|
#define call_init_pointer(obj, target) \
|
||||||
|
({ \
|
||||||
|
uint64_t old1; \
|
||||||
|
old1 = set_gp(obj); \
|
||||||
|
(((InitArrFunc)(target))(main_argc, main_argv, environ)); \
|
||||||
|
__asm __volatile("mv gp, %0" :: "r"(old1)); \
|
||||||
|
})
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Lazy binding entry point, called via PLT.
|
||||||
|
*/
|
||||||
|
void _rtld_bind_start(void);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* TLS
|
||||||
|
*/
|
||||||
|
#define TLS_TP_OFFSET 0x0
|
||||||
|
#define TLS_DTV_OFFSET 0x800
|
||||||
|
#define TLS_TCB_SIZE 16
|
||||||
|
|
||||||
|
#define round(size, align) \
|
||||||
|
(((size) + (align) - 1) & ~((align) - 1))
|
||||||
|
#define calculate_first_tls_offset(size, align) \
|
||||||
|
round(16, align)
|
||||||
|
#define calculate_tls_offset(prev_offset, prev_size, size, align) \
|
||||||
|
round(prev_offset + prev_size, align)
|
||||||
|
#define calculate_tls_end(off, size) ((off) + (size))
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
unsigned long ti_module;
|
||||||
|
unsigned long ti_offset;
|
||||||
|
} tls_index;
|
||||||
|
|
||||||
|
extern void *__tls_get_addr(tls_index* ti);
|
||||||
|
|
||||||
|
#define RTLD_DEFAULT_STACK_PF_EXEC PF_X
|
||||||
|
#define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
|
||||||
|
|
||||||
|
#endif
|
129
libexec/rtld-elf/riscv/rtld_start.S
Normal file
129
libexec/rtld-elf/riscv/rtld_start.S
Normal file
@ -0,0 +1,129 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* This software was developed by SRI International and the University of
|
||||||
|
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
|
||||||
|
* ("CTSRD"), as part of the DARPA CRASH research programme.
|
||||||
|
*
|
||||||
|
* This software was developed by the University of Cambridge Computer
|
||||||
|
* Laboratory as part of the CTSRD Project, with support from the UK Higher
|
||||||
|
* Education Innovation Fund (HEIF).
|
||||||
|
*
|
||||||
|
* 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 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 AUTHOR 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 <machine/asm.h>
|
||||||
|
__FBSDID("$FreeBSD$");
|
||||||
|
|
||||||
|
/*
|
||||||
|
* func_ptr_type
|
||||||
|
* _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
|
||||||
|
*/
|
||||||
|
|
||||||
|
ENTRY(.rtld_start)
|
||||||
|
mv s0, a0 /* Put ps_strings in a callee-saved register */
|
||||||
|
mv s1, sp /* And the stack pointer */
|
||||||
|
|
||||||
|
addi sp, sp, -16 /* Make room for obj_main & exit proc */
|
||||||
|
|
||||||
|
mv a1, sp /* exit_proc */
|
||||||
|
addi a2, a1, 8 /* obj_main */
|
||||||
|
jal _rtld /* Call the loader */
|
||||||
|
mv t0, a0 /* Backup the entry point */
|
||||||
|
|
||||||
|
ld a2, 0(sp) /* Load cleanup */
|
||||||
|
ld a1, 8(sp) /* Load obj_main */
|
||||||
|
mv a0, s0 /* Restore ps_strings */
|
||||||
|
mv sp, s1 /* Restore the stack pointer */
|
||||||
|
jr t0 /* Jump to the entry point */
|
||||||
|
END(.rtld_start)
|
||||||
|
|
||||||
|
/*
|
||||||
|
* t0 = obj pointer
|
||||||
|
* t1 = reloc offset
|
||||||
|
*/
|
||||||
|
ENTRY(_rtld_bind_start)
|
||||||
|
/* Save the arguments and ra */
|
||||||
|
addi sp, sp, -(8 * 25)
|
||||||
|
sd a0, (8 * 0)(sp)
|
||||||
|
sd a1, (8 * 1)(sp)
|
||||||
|
sd a2, (8 * 2)(sp)
|
||||||
|
sd a3, (8 * 3)(sp)
|
||||||
|
sd a4, (8 * 4)(sp)
|
||||||
|
sd a5, (8 * 5)(sp)
|
||||||
|
sd a6, (8 * 6)(sp)
|
||||||
|
sd a7, (8 * 7)(sp)
|
||||||
|
sd ra, (8 * 8)(sp)
|
||||||
|
#if 0
|
||||||
|
/* RISCVTODO VFP */
|
||||||
|
/* Save any floating-point arguments */
|
||||||
|
fsq fa0, (8 * 9)(sp)
|
||||||
|
fsq fa1, (8 * 11)(sp)
|
||||||
|
fsq fa2, (8 * 13)(sp)
|
||||||
|
fsq fa3, (8 * 15)(sp)
|
||||||
|
fsq fa4, (8 * 17)(sp)
|
||||||
|
fsq fa5, (8 * 19)(sp)
|
||||||
|
fsq fa6, (8 * 21)(sp)
|
||||||
|
fsq fa7, (8 * 23)(sp)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Reloc offset is 3x of the .got.plt offset */
|
||||||
|
slli a1, t1, 1 /* Mult items by 2 */
|
||||||
|
add a1, a1, t1 /* Plus item */
|
||||||
|
|
||||||
|
/* Load obj */
|
||||||
|
mv a0, t0
|
||||||
|
|
||||||
|
/* Call into rtld */
|
||||||
|
jal _rtld_bind
|
||||||
|
|
||||||
|
/* Backup the address to branch to */
|
||||||
|
mv t0, a0
|
||||||
|
|
||||||
|
/* Restore the arguments and ra */
|
||||||
|
ld a0, (8 * 0)(sp)
|
||||||
|
ld a1, (8 * 1)(sp)
|
||||||
|
ld a2, (8 * 2)(sp)
|
||||||
|
ld a3, (8 * 3)(sp)
|
||||||
|
ld a4, (8 * 4)(sp)
|
||||||
|
ld a5, (8 * 5)(sp)
|
||||||
|
ld a6, (8 * 6)(sp)
|
||||||
|
ld a7, (8 * 7)(sp)
|
||||||
|
ld ra, (8 * 8)(sp)
|
||||||
|
#if 0
|
||||||
|
/* RISCVTODO VFP */
|
||||||
|
/* Restore floating-point arguments */
|
||||||
|
flq fa0, (8 * 9)(sp)
|
||||||
|
flq fa1, (8 * 11)(sp)
|
||||||
|
flq fa2, (8 * 13)(sp)
|
||||||
|
flq fa3, (8 * 15)(sp)
|
||||||
|
flq fa4, (8 * 17)(sp)
|
||||||
|
flq fa5, (8 * 19)(sp)
|
||||||
|
flq fa6, (8 * 21)(sp)
|
||||||
|
flq fa7, (8 * 23)(sp)
|
||||||
|
#endif
|
||||||
|
addi sp, sp, (8 * 25)
|
||||||
|
|
||||||
|
/* Call into the correct function */
|
||||||
|
jr t0
|
||||||
|
END(_rtld_bind_start)
|
@ -4396,7 +4396,7 @@ tls_get_addr_common(Elf_Addr **dtvp, int index, size_t offset)
|
|||||||
}
|
}
|
||||||
|
|
||||||
#if defined(__aarch64__) || defined(__arm__) || defined(__mips__) || \
|
#if defined(__aarch64__) || defined(__arm__) || defined(__mips__) || \
|
||||||
defined(__powerpc__)
|
defined(__powerpc__) || defined(__riscv__)
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Allocate Static TLS using the Variant I method.
|
* Allocate Static TLS using the Variant I method.
|
||||||
|
Loading…
Reference in New Issue
Block a user