| /branches/dynload/uspace/lib/libc/rtld/arch/ppc32/Makefile.inc |
|---|
| 0,0 → 1,33 |
| # |
| # Copyright (c) 2008 Jiri Svoboda |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - 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. |
| # - 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. |
| # |
| CFLAGS += -D__32_BITS__ |
| ARCH_SOURCES += \ |
| rtld/arch/$(UARCH)/src/dynamic.c \ |
| rtld/arch/$(UARCH)/src/reloc.c |
| /branches/dynload/uspace/lib/libc/rtld/arch/ppc32/include/dynamic.h |
|---|
| 0,0 → 1,47 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef ppc32_DYNAMIC_H_ |
| #define ppc32_DYNAMIC_H_ |
| #include <sys/types.h> |
| typedef struct { |
| /* Empty. */ |
| } dyn_info_arch_t; |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ppc32/include/elf_dyn.h |
|---|
| 0,0 → 1,56 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef ppc32_ELF_DYN_H_ |
| #define ppc32_ELF_DYN_H_ |
| /* |
| * ppc32 dynamic relocation types |
| */ |
| #define R_PPC_ADDR32 1 |
| #define R_PPC_ADDR16_LO 4 |
| #define R_PPC_ADDR16_HI 5 |
| #define R_PPC_ADDR16_HA 6 |
| #define R_PPC_REL24 10 |
| #define R_PPC_COPY 19 |
| #define R_PPC_JMP_SLOT 21 |
| #define R_PPC_RELATIVE 22 |
| #define R_PPC_DTPMOD32 68 |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ppc32/src/reloc.c |
|---|
| 0,0 → 1,293 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <arch.h> |
| #include <elf_dyn.h> |
| #include <symbol.h> |
| #include <rtld.h> |
| #include <smc.h> |
| #define __L(ptr) ((uint32_t)(ptr) & 0x0000ffff) |
| #define __HA(ptr) ((uint32_t)(ptr) >> 16) |
| // ldis r11, .PLTtable@ha |
| static inline uint32_t _ldis(unsigned rD, uint16_t imm16) |
| { |
| /* Special case of addis: ldis rD,SIMM == addis rD,0,SIMM */ |
| return 0x3C000000 | (rD << 21) | imm16; |
| } |
| static inline uint32_t _lwz(unsigned rD, uint16_t disp16, unsigned rA) |
| { |
| return 0x80000000 | (rD << 21) | (rA << 16) | disp16; |
| } |
| static inline uint32_t _mtctr(unsigned rS) |
| { |
| /* mtctr rD == mtspr 9, rD */ |
| return 0x7c0003a6 | (rS << 21) | (9/*CTR*/ << 16); |
| } |
| static inline uint32_t _bctr() |
| { |
| /* bcctr 0x1f, 0 */ |
| return 0x4c000420 | (0x1f/*always*/ << 21); |
| } |
| /* branch */ |
| static inline uint32_t _b(uint32_t *addr, uint32_t *location) |
| { |
| uint32_t raddr = ((uint32_t)addr - (uint32_t)location) & 0x03fffffc; |
| return 0x48000000 | raddr; |
| } |
| /* |
| * Fill in PLT |
| */ |
| void module_process_pre_arch(module_t *m) |
| { |
| uint32_t *plt; |
| uint32_t *_plt_ent; |
| /* No lazy linking -- no pre-processing yet. */ |
| return; |
| plt = m->dyn.plt_got; |
| if (!plt) { |
| /* Module has no PLT */ |
| return; |
| } |
| // PLT entries start here. However, each occupies 2 words |
| _plt_ent = plt + 18; |
| // By definition of the ppc ABI, there's 1:1 correspondence |
| // between JMPREL entries and PLT entries |
| unsigned plt_n = m->dyn.plt_rel_sz / sizeof(elf_rela_t); |
| uint32_t *_plt_table; |
| uint32_t *_plt_call; |
| uint32_t *_plt_resolve; |
| _plt_resolve = plt; |
| _plt_call = plt + 6; |
| _plt_table = plt + 18 + plt_n; |
| /* .PLTcall: */ |
| plt[6] = _ldis(11, __HA(_plt_table)); // ldis r11, .PLTtable@ha |
| plt[7] = _lwz(11, __L(_plt_table), 11); // lwz r11, .PLTtable@l(r11) |
| plt[8] = _mtctr(11); // mtctr r11 |
| plt[9] = _bctr(); |
| /* .PLTi, i = 0..N-1 */ |
| // kputint(-4); |
| /* for (i = 0; i < plt_n; ++i) { |
| //_plt_table[i] == function address; |
| plt[18+i] = _b(_plt_call, &plt[18+i]); // b .PLTcall |
| }*/ |
| } |
| void rel_table_process(module_t *m, elf_rel_t *rt, size_t rt_size) |
| { |
| /* Unused */ |
| (void)m; (void)rt; (void)rt_size; |
| } |
| /** |
| * Process (fixup) all relocations in a relocation table. |
| */ |
| void rela_table_process(module_t *m, elf_rela_t *rt, size_t rt_size) |
| { |
| int i; |
| size_t rt_entries; |
| size_t r_offset; |
| elf_word r_info; |
| unsigned rel_type; |
| elf_word sym_idx; |
| uintptr_t sym_addr; |
| uintptr_t r_addend; |
| elf_symbol_t *sym_table; |
| elf_symbol_t *sym; |
| uint32_t *r_ptr; |
| uint16_t *r_ptr16; |
| char *str_tab; |
| elf_symbol_t *sym_def; |
| module_t *dest; |
| uint32_t *plt; |
| uint32_t *_plt_table; |
| uint32_t *_plt_ent; |
| uint32_t plt_n; |
| uint32_t pidx; |
| uint32_t t_addr; |
| uint32_t sym_size; |
| plt = m->dyn.plt_got; |
| plt_n = m->dyn.plt_rel_sz / sizeof(elf_rela_t); |
| _plt_ent = plt+ 18; |
| _plt_table = plt + 18 + plt_n; |
| DPRINTF("parse relocation table\n"); |
| sym_table = m->dyn.sym_tab; |
| rt_entries = rt_size / sizeof(elf_rela_t); |
| str_tab = m->dyn.str_tab; |
| DPRINTF("address: 0x%x, entries: %d\n", (uintptr_t)rt, rt_entries); |
| for (i = 0; i < rt_entries; ++i) { |
| DPRINTF("symbol %d: ", i); |
| r_offset = rt[i].r_offset; |
| r_info = rt[i].r_info; |
| r_addend = rt[i].r_addend; |
| sym_idx = ELF32_R_SYM(r_info); |
| sym = &sym_table[sym_idx]; |
| DPRINTF("name '%s', value 0x%x, size 0x%x\n", |
| str_tab + sym->st_name, |
| sym->st_value, |
| sym->st_size); |
| rel_type = ELF32_R_TYPE(r_info); |
| r_ptr = (uint32_t *)(r_offset + m->bias); |
| r_ptr16 = (uint16_t *)(r_offset + m->bias); |
| if (sym->st_name != 0) { |
| DPRINTF("rel_type: %x, rel_offset: 0x%x\n", rel_type, r_offset); |
| sym_def = symbol_def_find(str_tab + sym->st_name, |
| m, &dest); |
| DPRINTF("dest name: '%s'\n", dest->dyn.soname); |
| DPRINTF("dest bias: 0x%x\n", dest->bias); |
| if (sym_def) { |
| sym_addr = symbol_get_addr(sym_def, dest); |
| DPRINTF("symbol definition found, addr=0x%x\n", sym_addr); |
| } else { |
| DPRINTF("symbol definition not found\n"); |
| continue; |
| } |
| } |
| switch (rel_type) { |
| case R_PPC_ADDR16_LO: |
| DPRINTF("fixup R_PPC_ADDR16_LO (#lo(s+a))\n"); |
| *r_ptr16 = (sym_addr + r_addend) & 0xffff; |
| break; |
| case R_PPC_ADDR16_HI: |
| DPRINTF("fixup R_PPC_ADDR16_HI (#hi(s+a))\n"); |
| *r_ptr16 = (sym_addr + r_addend) >> 16; |
| break; |
| case R_PPC_ADDR16_HA: |
| DPRINTF("fixup R_PPC_ADDR16_HA (#ha(s+a))\n"); |
| t_addr = sym_addr + r_addend; |
| *r_ptr16 = (t_addr >> 16) + ((t_addr & 0x8000) ? 1 : 0); |
| break; |
| case R_PPC_JMP_SLOT: |
| DPRINTF("fixup R_PPC_JMP_SLOT (b+v)\n"); |
| pidx = (r_ptr - _plt_ent) / 2; |
| if (pidx >= plt_n) { |
| DPRINTF("error: proc index out of range\n"); |
| exit(1); |
| } |
| plt[18+2*pidx] = _b((void *)sym_addr, &plt[18+2*pidx]); |
| break; |
| case R_PPC_ADDR32: |
| DPRINTF("fixup R_PPC_ADDR32 (b+v+a)\n"); |
| *r_ptr = r_addend + sym_addr; |
| break; |
| case R_PPC_COPY: |
| /* |
| * Copy symbol data from shared object to specified |
| * location. |
| */ |
| DPRINTF("fixup R_PPC_COPY (s)\n"); |
| sym_size = sym->st_size; |
| if (sym_size != sym_def->st_size) { |
| printf("warning: mismatched symbol sizes\n"); |
| /* Take the lower value. */ |
| if (sym_size > sym_def->st_size) |
| sym_size = sym_def->st_size; |
| } |
| memcpy(r_ptr, (const void *)sym_addr, sym_size); |
| break; |
| case R_PPC_RELATIVE: |
| DPRINTF("fixup R_PPC_RELATIVE (b+a)\n"); |
| *r_ptr = r_addend + m->bias; |
| break; |
| case R_PPC_REL24: |
| DPRINTF("fixup R_PPC_REL24 (s+a-p)>>2\n"); |
| *r_ptr = (sym_addr + r_addend - (uint32_t)r_ptr) >> 2; |
| break; |
| case R_PPC_DTPMOD32: |
| /* |
| * We can ignore this as long as the only module |
| * with TLS variables is libc.so. |
| */ |
| DPRINTF("Ignoring R_PPC_DTPMOD32\n"); |
| break; |
| default: |
| printf("Error: Unknown relocation type %d.\n", |
| rel_type); |
| exit(1); |
| break; |
| } |
| } |
| /* |
| * Synchronize the used portion of PLT. This is necessary since |
| * we are writing instructions. |
| */ |
| smc_coherence(&plt[18], plt_n * 2 * sizeof(uint32_t)); |
| } |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ppc32/src/dynamic.c |
|---|
| 0,0 → 1,51 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <elf_dyn.h> |
| #include <dynamic.h> |
| void dyn_parse_arch(elf_dyn_t *dp, size_t bias, dyn_info_t *info) |
| { |
| (void) dp; |
| (void) bias; |
| (void) info; |
| } |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/mips32/Makefile.inc |
|---|
| 0,0 → 1,33 |
| # |
| # Copyright (c) 2008 Jiri Svoboda |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - 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. |
| # - 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. |
| # |
| CFLAGS += -D__32_BITS__ |
| ARCH_SOURCES += \ |
| rtld/arch/$(UARCH)/src/dynamic.c \ |
| rtld/arch/$(UARCH)/src/reloc.c |
| /branches/dynload/uspace/lib/libc/rtld/arch/mips32/include/elf_dyn.h |
|---|
| 0,0 → 1,58 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef mips32_ELF_DYN_H_ |
| #define mips32_ELF_DYN_H_ |
| /* |
| * mips32 program header types |
| */ |
| #define DT_MIPS_BASE_ADDRESS 0x70000006 |
| #define DT_MIPS_LOCAL_GOTNO 0x7000000a |
| #define DT_MIPS_SYMTABNO 0x70000011 |
| #define DT_MIPS_GOTSYM 0x70000013 |
| /* |
| * mips32 relocation types |
| */ |
| #define R_MIPS_NONE 0 |
| #define R_MIPS_REL32 3 |
| #define R_MIPS_TLS_DTPMOD32 333 /* fixme */ |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/mips32/include/dynamic.h |
|---|
| 0,0 → 1,54 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef mips32_DYNAMIC_H_ |
| #define mips32_DYNAMIC_H_ |
| #include <sys/types.h> |
| typedef struct { |
| /** Number of local entries in GOT. */ |
| uint32_t lgotno; |
| /** Index of first GOT-mapped dynamic symbol. */ |
| uint32_t gotsym; |
| /** Number of entries in dynamic symbol table. */ |
| uint32_t sym_no; |
| /** ???. */ |
| uint32_t base; |
| } dyn_info_arch_t; |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/mips32/src/dynamic.c |
|---|
| 0,0 → 1,61 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <elf_dyn.h> |
| #include <dynamic.h> |
| void dyn_parse_arch(elf_dyn_t *dp, size_t bias, dyn_info_t *info) |
| { |
| // void *d_ptr; |
| elf_word d_val; |
| // d_ptr = (void *)((uint8_t *)dp->d_un.d_ptr + bias); |
| d_val = dp->d_un.d_val; |
| switch (dp->d_tag) { |
| case DT_MIPS_BASE_ADDRESS: info->arch.base = d_val; break; |
| case DT_MIPS_LOCAL_GOTNO: info->arch.lgotno = d_val; break; |
| case DT_MIPS_SYMTABNO: info->arch.sym_no = d_val; break; |
| case DT_MIPS_GOTSYM: info->arch.gotsym = d_val; break; |
| default: break; |
| } |
| } |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/mips32/src/reloc.c |
|---|
| 0,0 → 1,259 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <arch.h> |
| #include <elf_dyn.h> |
| #include <symbol.h> |
| #include <rtld.h> |
| void module_process_pre_arch(module_t *m) |
| { |
| elf_symbol_t *sym_table; |
| elf_symbol_t *sym_def; |
| elf_symbol_t *sym; |
| uint32_t gotsym; |
| uint32_t lgotno; |
| uint32_t *got; |
| char *str_tab; |
| int i, j; |
| uint32_t sym_addr; |
| module_t *dest; |
| got = (uint32_t *) m->dyn.plt_got; |
| sym_table = m->dyn.sym_tab; |
| str_tab = m->dyn.str_tab; |
| gotsym = m->dyn.arch.gotsym; |
| lgotno = m->dyn.arch.lgotno; |
| DPRINTF("** Relocate GOT entries **\n"); |
| DPRINTF("MIPS base = 0x%x\n", m->dyn.arch.base); |
| /* |
| * Local entries. |
| */ |
| for (i = 0; i < gotsym; i++) { |
| /* FIXME: really subtract MIPS base? */ |
| got[i] += m->bias - m->dyn.arch.base; |
| } |
| DPRINTF("sym_ent = %d, gotsym = %d\n", m->dyn.arch.sym_no, gotsym); |
| DPRINTF("lgotno = %d\n", lgotno); |
| /* |
| * Iterate over GOT-mapped symbol entries. |
| */ |
| for (j = gotsym; j < m->dyn.arch.sym_no; j++) { |
| /* Corresponding (global) GOT entry. */ |
| i = lgotno + j - gotsym; |
| DPRINTF("relocate GOT entry %d\n", i); |
| // getchar(); |
| // getchar(); |
| sym = &sym_table[j]; |
| if (ELF32_R_TYPE(sym->st_info) == STT_FUNC) { |
| if (sym->st_shndx == SHN_UNDEF) { |
| if (sym->st_value == 0) { |
| /* 1 */ |
| } else { |
| if (got[i] == sym->st_value) { |
| /* 2 */ |
| DPRINTF("(2)\n"); |
| got[i] += m->bias - m->dyn.arch.base; |
| continue; |
| } else { |
| /* 3 */ |
| DPRINTF("(3)\n"); |
| got[i] = sym->st_value + m->bias - m->dyn.arch.base; |
| continue; |
| } |
| } |
| } else { |
| /* 2 */ |
| DPRINTF("(2)\n"); |
| got[i] += m->bias - m->dyn.arch.base; |
| continue; |
| } |
| } else { |
| if (sym->st_shndx == SHN_UNDEF || |
| sym->st_shndx == SHN_COMMON) { |
| /* 1 */ |
| } else { |
| /* 1 */ |
| } |
| } |
| DPRINTF("(1) symbol name='%s'\n", str_tab + sym->st_name); |
| sym_def = symbol_def_find(str_tab + sym->st_name, m, &dest); |
| if (sym_def) { |
| sym_addr = symbol_get_addr(sym_def, dest); |
| DPRINTF("symbol definition found, addr=0x%x\n", sym_addr); |
| } else { |
| DPRINTF("symbol definition not found\n"); |
| continue; |
| } |
| DPRINTF("write 0x%x at 0x%x\n", sym_addr, (uint32_t) &got[i]); |
| got[i] = sym_addr; |
| } |
| DPRINTF("** Done **\n"); |
| } |
| /** |
| * Process (fixup) all relocations in a relocation table. |
| */ |
| void rel_table_process(module_t *m, elf_rel_t *rt, size_t rt_size) |
| { |
| int i; |
| size_t rt_entries; |
| size_t r_offset; |
| elf_word r_info; |
| unsigned rel_type; |
| elf_word sym_idx; |
| uintptr_t sym_addr; |
| elf_symbol_t *sym_table; |
| elf_symbol_t *sym; |
| uint32_t *r_ptr; |
| uint16_t *r_ptr16; |
| char *str_tab; |
| elf_symbol_t *sym_def; |
| module_t *dest; |
| uint32_t *got; |
| uint32_t gotsym; |
| uint32_t lgotno; |
| uint32_t ea; |
| DPRINTF("parse relocation table\n"); |
| sym_table = m->dyn.sym_tab; |
| rt_entries = rt_size / sizeof(elf_rela_t); |
| str_tab = m->dyn.str_tab; |
| got = (uint32_t *) m->dyn.plt_got; |
| gotsym = m->dyn.arch.gotsym; |
| lgotno = m->dyn.arch.lgotno; |
| DPRINTF("got=0x%lx, gotsym=%d\n", (uintptr_t) got, gotsym); |
| DPRINTF("address: 0x%x, entries: %d\n", (uintptr_t)rt, rt_entries); |
| for (i = 0; i < rt_entries; ++i) { |
| DPRINTF("symbol %d: ", i); |
| r_offset = rt[i].r_offset; |
| r_info = rt[i].r_info; |
| sym_idx = ELF32_R_SYM(r_info); |
| sym = &sym_table[sym_idx]; |
| DPRINTF("name '%s', value 0x%x, size 0x%x\n", |
| str_tab + sym->st_name, |
| sym->st_value, |
| sym->st_size); |
| rel_type = ELF32_R_TYPE(r_info); |
| r_ptr = (uint32_t *)(r_offset + m->bias); |
| r_ptr16 = (uint16_t *)(r_offset + m->bias); |
| if (sym->st_name != 0) { |
| DPRINTF("rel_type: %x, rel_offset: 0x%x\n", rel_type, r_offset); |
| DPRINTF("dest name: '%s'\n", dest->dyn.soname); |
| DPRINTF("dest bias: 0x%x\n", dest->bias); |
| if (sym_def) { |
| sym_addr = symbol_get_addr(sym_def, dest); |
| DPRINTF("symbol definition found, addr=0x%x\n", sym_addr); |
| } else { |
| DPRINTF("symbol definition not found\n"); |
| continue; |
| } |
| } |
| DPRINTF("switch(%u)\n", rel_type); |
| switch (rel_type) { |
| case R_MIPS_NONE: |
| DPRINTF("Ignoring R_MIPS_NONE\n"); |
| break; |
| case R_MIPS_REL32: |
| DPRINTF("fixup R_MIPS_REL32 (r - ea + s)\n"); |
| if (sym_idx < gotsym) |
| ea = sym_addr; |
| else |
| ea = got[lgotno + sym_idx - gotsym]; |
| *r_ptr += sym_addr - ea; |
| DPRINTF("p = 0x%x, val := 0x%x\n", (uint32_t) r_ptr, |
| *r_ptr); |
| // getchar(); |
| break; |
| /* No other non-TLS relocation types should appear. */ |
| case R_MIPS_TLS_DTPMOD32: |
| /* |
| * We can ignore this as long as the only module |
| * with TLS variables is libc.so. |
| */ |
| DPRINTF("Ignoring R_MIPS_DTPMOD32\n"); |
| break; |
| default: |
| printf("Error: Unknown relocation type %d.\n", |
| rel_type); |
| exit(1); |
| break; |
| } |
| } |
| printf("relocation done\n"); |
| } |
| void rela_table_process(module_t *m, elf_rela_t *rt, size_t rt_size) |
| { |
| /* Unused */ |
| (void)m; (void)rt; (void)rt_size; |
| } |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ia32/Makefile.inc |
|---|
| 0,0 → 1,33 |
| # |
| # Copyright (c) 2008 Jiri Svoboda |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - 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. |
| # - 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. |
| # |
| CFLAGS += -D__32_BITS__ |
| ARCH_SOURCES += \ |
| rtld/arch/$(UARCH)/src/dynamic.c \ |
| rtld/arch/$(UARCH)/src/reloc.c |
| /branches/dynload/uspace/lib/libc/rtld/arch/ia32/include/dynamic.h |
|---|
| 0,0 → 1,47 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef ia32_DYNAMIC_H_ |
| #define ia32_DYNAMIC_H_ |
| #include <sys/types.h> |
| typedef struct { |
| /* Empty. */ |
| } dyn_info_arch_t; |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ia32/include/elf_dyn.h |
|---|
| 0,0 → 1,54 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** @file |
| */ |
| #ifndef ia32_ELF_DYN_H_ |
| #define ia32_ELF_DYN_H_ |
| /* |
| * ia32 dynamic relocation types |
| */ |
| #define R_386_32 1 |
| #define R_386_PC32 2 |
| #define R_386_COPY 5 |
| #define R_386_GLOB_DAT 6 |
| #define R_386_JUMP_SLOT 7 |
| #define R_386_RELATIVE 8 |
| #define R_386_TLS_DTPMOD32 35 |
| #endif |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ia32/src/dynamic.c |
|---|
| 0,0 → 1,51 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <elf_dyn.h> |
| #include <dynamic.h> |
| void dyn_parse_arch(elf_dyn_t *dp, size_t bias, dyn_info_t *info) |
| { |
| (void) dp; |
| (void) bias; |
| (void) info; |
| } |
| /** @} |
| */ |
| /branches/dynload/uspace/lib/libc/rtld/arch/ia32/src/reloc.c |
|---|
| 0,0 → 1,177 |
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - 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. |
| */ |
| /** @addtogroup rtld rtld |
| * @brief |
| * @{ |
| */ |
| /** |
| * @file |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <elf_dyn.h> |
| #include <symbol.h> |
| #include <rtld.h> |
| #include <rtld_arch.h> |
| void module_process_pre_arch(module_t *m) |
| { |
| /* Unused */ |
| } |
| /** |
| * Process (fixup) all relocations in a relocation table. |
| */ |
| void rel_table_process(module_t *m, elf_rel_t *rt, size_t rt_size) |
| { |
| int i; |
| size_t rt_entries; |
| size_t r_offset; |
| elf_word r_info; |
| unsigned rel_type; |
| elf_word sym_idx; |
| uintptr_t sym_addr; |
| elf_symbol_t *sym_table; |
| elf_symbol_t *sym; |
| uint32_t *r_ptr; |
| uint32_t sym_size; |
| char *str_tab; |
| elf_symbol_t *sym_def; |
| module_t *dest; |
| DPRINTF("parse relocation table\n"); |
| sym_table = m->dyn.sym_tab; |
| rt_entries = rt_size / sizeof(elf_rel_t); |
| str_tab = m->dyn.str_tab; |
| DPRINTF("address: 0x%x, entries: %d\n", (uintptr_t)rt, rt_entries); |
| for (i = 0; i < rt_entries; ++i) { |
| // DPRINTF("symbol %d: ", i); |
| r_offset = rt[i].r_offset; |
| r_info = rt[i].r_info; |
| sym_idx = ELF32_R_SYM(r_info); |
| sym = &sym_table[sym_idx]; |
| /* DPRINTF("name '%s', value 0x%x, size 0x%x\n", |
| str_tab + sym->st_name, |
| sym->st_value, |
| sym->st_size); |
| */ |
| rel_type = ELF32_R_TYPE(r_info); |
| r_ptr = (uint32_t *)(r_offset + m->bias); |
| if (sym->st_name != 0) { |
| // DPRINTF("rel_type: %x, rel_offset: 0x%x\n", rel_type, r_offset); |
| sym_def = symbol_def_find(str_tab + sym->st_name, |
| m, &dest); |
| // DPRINTF("dest name: '%s'\n", dest->dyn.soname); |
| // DPRINTF("dest bias: 0x%x\n", dest->bias); |
| if (sym_def) { |
| sym_addr = symbol_get_addr(sym_def, dest); |
| // DPRINTF("symbol definition found, addr=0x%x\n", sym_addr); |
| } else { |
| DPRINTF("symbol definition not found\n"); |
| continue; |
| } |
| } |
| switch (rel_type) { |
| case R_386_GLOB_DAT: |
| case R_386_JUMP_SLOT: |
| DPRINTF("fixup R_386_GLOB_DAT/JUMP_SLOT (b+v)\n"); |
| *r_ptr = sym_addr; |
| break; |
| case R_386_32: |
| DPRINTF("fixup R_386_32 (b+v+a)\n"); |
| *r_ptr += sym_addr; |
| break; |
| case R_386_PC32: |
| DPRINTF("fixup R_386_PC32 (b+v+a-p)\n"); |
| *r_ptr += sym_addr - (uint32_t) r_ptr; |
| break; |
| case R_386_COPY: |
| /* |
| * Copy symbol data from shared object to specified |
| * location. |
| */ |
| DPRINTF("fixup R_386_COPY (s)\n"); |
| sym_size = sym->st_size; |
| if (sym_size != sym_def->st_size) { |
| printf("Warning: Mismatched symbol sizes.\n"); |
| /* Take the lower value. */ |
| if (sym_size > sym_def->st_size) |
| sym_size = sym_def->st_size; |
| } |
| memcpy(r_ptr, (const void *)sym_addr, sym_size); |
| break; |
| case R_386_RELATIVE: |
| DPRINTF("fixup R_386_RELATIVE (b+a)\n"); |
| *r_ptr += m->bias; |
| break; |
| case R_386_TLS_DTPMOD32: |
| /* |
| * We can ignore this as long as the only module |
| * with TLS variables is libc.so. |
| */ |
| DPRINTF("Ignoring R_386_TLS_DTPMOD32\n"); |
| break; |
| default: |
| printf("Error: Unknown relocation type %d\n", |
| rel_type); |
| exit(1); |
| } |
| } |
| } |
| void rela_table_process(module_t *m, elf_rela_t *rt, size_t rt_size) |
| { |
| /* Unused */ |
| (void)m; (void)rt; (void)rt_size; |
| } |
| /** @} |
| */ |