diff options
Diffstat (limited to 'ldso')
| -rw-r--r-- | ldso/include/dl-string.h | 2 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/dl-debug.h | 54 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/dl-startup.h | 102 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/dl-syscalls.h | 6 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/dl-sysdep.h | 85 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/elfinterp.c | 330 | ||||
| -rw-r--r-- | ldso/ldso/microblaze/resolve.S | 52 |
7 files changed, 630 insertions, 1 deletions
diff --git a/ldso/include/dl-string.h b/ldso/include/dl-string.h index 01ab50ec9..a7e2f47ff 100644 --- a/ldso/include/dl-string.h +++ b/ldso/include/dl-string.h @@ -286,7 +286,7 @@ static __always_inline char * _dl_simple_ltoahex(char *local, unsigned long i) * This requires that load_addr must already be defined... */ #if defined(mc68000) || defined(__arm__) || defined(__thumb__) || \ defined(__mips__) || defined(__sh__) || defined(__powerpc__) || \ - defined(__avr32__) || defined(__xtensa__) || defined(__sparc__) + defined(__avr32__) || defined(__xtensa__) || defined(__sparc__) || defined(__microblaze__) # define CONSTANT_STRING_GOT_FIXUP(X) \ if ((X) < (const char *) load_addr) (X) += load_addr # define NO_EARLY_SEND_STDERR diff --git a/ldso/ldso/microblaze/dl-debug.h b/ldso/ldso/microblaze/dl-debug.h new file mode 100644 index 000000000..6fd7bd59f --- /dev/null +++ b/ldso/ldso/microblaze/dl-debug.h @@ -0,0 +1,54 @@ +/* vi: set sw=4 ts=4: */ +/* microblaze shared library loader suppport + * + * Copyright (C) 2011 Ryan Flux + * + * 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. The name of the above contributors may not be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE 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 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. + */ + +static const char * const _dl_reltypes_tab[] = + { + "R_MICROBLAZE_NONE", + "R_MICROBLAZE_32", + "R_MICROBLAZE_32_PCREL", + "R_MICROBLAZE_64_PCREL", + "R_MICROBLAZE_32_PCREL_LO", + "R_MICROBLAZE_64", + "R_MICROBLAZE_32_LO", + "R_MICROBLAZE_SRO32", + "R_MICROBLAZE_SRW32", + "R_MICROBLAZE_64_NONE", + "R_MICROBLAZE_32_SYM_OP_SYM", + "R_MICROBLAZE_GNU_VTINHERIT", + "R_MICROBLAZE_GNU_VTENTRY", + "R_MICROBLAZE_GOTPC_64", + "R_MICROBLAZE_GOT_64", + "R_MICROBLAZE_PLT_64", + "R_MICROBLAZE_REL", + "R_MICROBLAZE_JUMP_SLOT", + "R_MICROBLAZE_GLOB_DAT", + "R_MICROBLAZE_GOTOFF_64", + "R_MICROBLAZE_GOTOFF_32", + "R_MICROBLAZE_COPY", + }; diff --git a/ldso/ldso/microblaze/dl-startup.h b/ldso/ldso/microblaze/dl-startup.h new file mode 100644 index 000000000..0d3f3bf15 --- /dev/null +++ b/ldso/ldso/microblaze/dl-startup.h @@ -0,0 +1,102 @@ +/* Startup code for the microblaze platform, based on glibc 2.3.6, dl-machine.h */ + +/* + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +__asm__ ("\ + .text\n\ + .globl _start\n\ + .type _start,@function\n\ +_start:\n\ + addk r5,r0,r1\n\ + addk r3,r0,r0\n\ +1:\n\ + addik r5,r5,4\n\ + lw r4,r5,r0\n\ + bneid r4,1b\n\ + addik r3,r3,1\n\ + addik r3,r3,-1\n\ + addk r5,r0,r1\n\ + sw r3,r5,r0\n\ + addik r1,r1,-24\n\ + sw r15,r1,r0\n\ + brlid r15,_dl_start\n\ + nop\n\ + /* FALLTHRU */\n\ +\n\ + .globl _dl_start_user\n\ + .type _dl_start_user,@function\n\ +_dl_start_user:\n\ + mfs r20,rpc\n\ + addik r20,r20,_GLOBAL_OFFSET_TABLE_+8\n\ + lwi r4,r20,_dl_skip_args@GOTOFF\n\ + lwi r5,r1,24\n\ + rsubk r5,r4,r5\n\ + addk r4,r4,r4\n\ + addk r4,r4,r4\n\ + addk r1,r1,r4\n\ + swi r5,r1,24\n\ + swi r3,r1,20\n\ + addk r6,r5,r0\n\ + addk r5,r5,r5\n\ + addk r5,r5,r5\n\ + addik r7,r1,28\n\ + addk r8,r7,r5\n\ + addik r8,r8,4\n\ + lwi r5,r1,24\n\ + lwi r3,r1,20\n\ + addk r4,r5,r5\n\ + addk r4,r4,r4\n\ + addik r6,r1,28\n\ + addk r7,r6,r4\n\ + addik r7,r7,4\n\ + addik r15,r20,_dl_fini@GOTOFF\n\ + addik r15,r15,-8\n\ + brad r3\n\ + addik r1,r1,24\n\ + nop\n\ + .size _dl_start_user, . - _dl_start_user\n\ + .previous"); + +/* + * Get a pointer to the argv array. On many platforms this can be just + * the address of the first argument, on other platforms we need to + * do something a little more subtle here. + */ +#define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) ARGS)+1) + +/* The ld.so library requires relocations */ +#define ARCH_NEEDS_BOOTSTRAP_RELOCS + +static __always_inline +void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr, + unsigned long symbol_addr, unsigned long load_addr, attribute_unused Elf32_Sym *symtab) +{ + + switch (ELF32_R_TYPE(rpnt->r_info)) + { + case R_MICROBLAZE_REL: + + *reloc_addr = load_addr + rpnt->r_addend; + break; + + default: + _dl_exit(1); + break; + + } + +} diff --git a/ldso/ldso/microblaze/dl-syscalls.h b/ldso/ldso/microblaze/dl-syscalls.h new file mode 100644 index 000000000..996bb87c6 --- /dev/null +++ b/ldso/ldso/microblaze/dl-syscalls.h @@ -0,0 +1,6 @@ +/* We can't use the real errno in ldso, since it has not yet + * been dynamicly linked in yet. */ +#include "sys/syscall.h" +extern int _dl_errno; +#undef __set_errno +#define __set_errno(X) {(_dl_errno) = (X);} diff --git a/ldso/ldso/microblaze/dl-sysdep.h b/ldso/ldso/microblaze/dl-sysdep.h new file mode 100644 index 000000000..1f89673a0 --- /dev/null +++ b/ldso/ldso/microblaze/dl-sysdep.h @@ -0,0 +1,85 @@ +/* elf reloc code for the microblaze platform, based on glibc 2.3.6, dl-machine.h */ + +/* + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* Use reloca */ +#define ELF_USES_RELOCA + +#include <elf.h> + + +/* Initialise the GOT */ +#define INIT_GOT(GOT_BASE,MODULE) \ +do { \ + GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \ + GOT_BASE[1] = (unsigned long) MODULE; \ +} while(0) + +/* Here we define the magic numbers that this dynamic loader should accept */ + +#define MAGIC1 EM_MICROBLAZE_OLD +#undef MAGIC2 +/* Used for error messages */ +#define ELF_TARGET "microblaze" + +#define elf_machine_type_class(type) \ + (((type) == R_MICROBLAZE_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT \ + | ((type) == R_MICROBLAZE_COPY) * ELF_RTYPE_CLASS_COPY) + +/* Return the link-time address of _DYNAMIC. Conveniently, this is the + first element of the GOT. This must be inlined in a function which + uses global data. */ +static inline Elf32_Addr +elf_machine_dynamic (void) +{ + Elf32_Addr got_entry_0; + __asm__ __volatile__( + "lwi %0,r20,0" + :"=r"(got_entry_0) + ); + return got_entry_0; +} + + +/* Return the run-time load address of the shared object. */ +static inline Elf32_Addr +elf_machine_load_address (void) +{ + /* Compute the difference between the runtime address of _DYNAMIC as seen + by a GOTOFF reference, and the link-time address found in the special + unrelocated first GOT entry. */ + Elf32_Addr dyn; + __asm__ __volatile__ ( + "addik %0,r20,_DYNAMIC@GOTOFF" + : "=r"(dyn) + ); + return dyn - elf_machine_dynamic (); +} + + + +static __always_inline void +elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr, + Elf32_Word relative_count) +{ + Elf32_Rel * rpnt = (void *) rel_addr; + do { + Elf32_Addr *const reloc_addr = (void *) (load_off + (rpnt)->r_offset); + + *reloc_addr += load_off; + } while (--relative_count); +} diff --git a/ldso/ldso/microblaze/elfinterp.c b/ldso/ldso/microblaze/elfinterp.c new file mode 100644 index 000000000..1f6aeffb7 --- /dev/null +++ b/ldso/ldso/microblaze/elfinterp.c @@ -0,0 +1,330 @@ +/* vi: set sw=4 ts=4: */ +/* microblaze ELF shared library loader suppport + * + * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald, + * David Engel, Hongjiu Lu and Mitch D'Souza + * Copyright (C) 2001-2004 Erik Andersen + * + * 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. The name of the above contributors may not be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE 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 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 "ldso.h" + +/* Program to load an ELF binary on a linux system, and run it. + References to symbols in sharable libraries can be resolved by either + an ELF sharable library or a linux style of shared library. */ + +/* Disclaimer: I have never seen any AT&T source code for SVr4, nor have + I ever taken any courses on internals. This program was developed using + information available through the book "UNIX SYSTEM V RELEASE 4, + Programmers guide: Ansi C and Programming Support Tools", which did + a more than adequate job of explaining everything required to get this + working. */ + +extern int _dl_linux_resolve(void); + +unsigned long +_dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) +{ + ELF_RELOC *this_reloc; + char *strtab; + ElfW(Sym) *symtab; + int symtab_index; + char *rel_addr; + char *new_addr; + char **got_addr; + ElfW(Addr) instr_addr; + char *symname; + + rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL]; + this_reloc = (ELF_RELOC *)(rel_addr + reloc_entry); + symtab_index = ELF_R_SYM(this_reloc->r_info); + + symtab = (ElfW(Sym) *)tpnt->dynamic_info[DT_SYMTAB]; + strtab = (char *)tpnt->dynamic_info[DT_STRTAB]; + symname = strtab + symtab[symtab_index].st_name; + + /* Address of the jump instruction to fix up. */ + instr_addr = (this_reloc->r_offset + tpnt->loadaddr); + got_addr = (char **)instr_addr; + + /* Get the address of the GOT entry. */ + new_addr = _dl_find_hash(symname, &_dl_loaded_modules->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT, NULL); + if (unlikely(!new_addr)) { + _dl_dprintf(2, "%s: Can't resolve symbol '%s'\n", _dl_progname, symname); + _dl_exit(1); + } + +#if defined (__SUPPORT_LD_DEBUG__) + if ((unsigned long)got_addr < 0x40000000) { + if (_dl_debug_bindings) { + _dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname); + if (_dl_debug_detail) + _dl_dprintf(_dl_debug_file, + "\tpatched: %x ==> %x @ %x\n", + *got_addr, new_addr, got_addr); + } + } + if (!_dl_debug_nofixups) +#endif + *got_addr = new_addr; + + return (unsigned long)new_addr; +} + +static int +_dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope, + unsigned long rel_addr, unsigned long rel_size, + int (*reloc_fnc)(struct elf_resolve *tpnt, struct r_scope_elem *scope, + ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab)) +{ + unsigned int i; + char *strtab; + ElfW(Sym) *symtab; + ELF_RELOC *rpnt; + int symtab_index; + + /* Parse the relocation information. */ + rpnt = (ELF_RELOC *)rel_addr; + rel_size /= sizeof(ELF_RELOC); + + symtab = (ElfW(Sym) *)tpnt->dynamic_info[DT_SYMTAB]; + strtab = (char *)tpnt->dynamic_info[DT_STRTAB]; + + for (i = 0; i < rel_size; i++, rpnt++) { + int res; + + symtab_index = ELF_R_SYM(rpnt->r_info); + + debug_sym(symtab, strtab, symtab_index); + debug_reloc(symtab, strtab, rpnt); + + res = reloc_fnc(tpnt, scope, rpnt, symtab, strtab); + + if (res == 0) + continue; + + _dl_dprintf(2, "\n%s: ", _dl_progname); + + if (symtab_index) + _dl_dprintf(2, "symbol '%s': ", + strtab + symtab[symtab_index].st_name); + + if (unlikely(res < 0)) { + int reloc_type = ELF_R_TYPE(rpnt->r_info); + + _dl_dprintf(2, "can't handle reloc type " +#if defined (__SUPPORT_LD_DEBUG__) + "%s\n", _dl_reltypes(reloc_type)); +#else + "%x\n", reloc_type); +#endif + _dl_exit(-res); + } else if (unlikely(res > 0)) { + _dl_dprintf(2, "can't resolve symbol\n"); + return res; + } + } + + return 0; +} + +static int +_dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, + ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab) +{ + int reloc_type; + int symtab_index; + char *symname; +#if defined USE_TLS && USE_TLS + struct elf_resolve *tls_tpnt; +#endif + struct symbol_ref sym_ref; + ElfW(Addr) *reloc_addr; + ElfW(Addr) symbol_addr; +#if defined (__SUPPORT_LD_DEBUG__) + ElfW(Addr) old_val; +#endif + + reloc_addr = (ElfW(Addr)*)(tpnt->loadaddr + (unsigned long)rpnt->r_offset); + reloc_type = ELF_R_TYPE(rpnt->r_info); + symtab_index = ELF_R_SYM(rpnt->r_info); + sym_ref.sym = &symtab[symtab_index]; + sym_ref.tpnt = NULL; + symbol_addr = 0; + symname = strtab + sym_ref.sym->st_name; + + if (symtab_index) { + symbol_addr = (ElfW(Addr))_dl_find_hash(symname, scope, tpnt, + elf_machine_type_class(reloc_type), &sym_ref); + /* + * We want to allow undefined references to weak symbols - this + * might have been intentional. We should not be linking local + * symbols here, so all bases should be covered. + */ + if (unlikely(!symbol_addr && (ELF_ST_TYPE(sym_ref.sym->st_info) != STT_TLS) + && (ELF_ST_BIND(sym_ref.sym->st_info) != STB_WEAK))) { + /* This may be non-fatal if called from dlopen. */ + return 1; + } +#if defined USE_TLS && USE_TLS + tls_tpnt = sym_ref.tpnt; +#endif + } else { + /* Relocs against STN_UNDEF are usually treated as using a + * symbol value of zero, and using the module containing the + * reloc itself. */ + symbol_addr = sym_ref.sym->st_value; +#if defined USE_TLS && USE_TLS + tls_tpnt = tpnt; +#endif + } + + +#if defined (__SUPPORT_LD_DEBUG__) + if (reloc_addr) { + old_val = *reloc_addr; + } else { + old_val = 0; + } +#endif + + switch (reloc_type) { + case R_MICROBLAZE_NONE: + case R_MICROBLAZE_64_NONE: + break; + + case R_MICROBLAZE_64: + *reloc_addr = symbol_addr + rpnt->r_addend; + break; + + case R_MICROBLAZE_32: + case R_MICROBLAZE_32_LO: + *reloc_addr = symbol_addr + rpnt->r_addend; + break; + + case R_MICROBLAZE_32_PCREL: + case R_MICROBLAZE_32_PCREL_LO: + case R_MICROBLAZE_64_PCREL: + case R_MICROBLAZE_SRO32: + case R_MICROBLAZE_SRW32: + *reloc_addr = symbol_addr + rpnt->r_addend; + break; + + case R_MICROBLAZE_GLOB_DAT: + case R_MICROBLAZE_JUMP_SLOT: + *reloc_addr = symbol_addr + rpnt->r_addend; + break; +/* Handled by elf_machine_relative */ + case R_MICROBLAZE_REL: + *reloc_addr = (unsigned long)tpnt->loadaddr + rpnt->r_addend; + break; + + case R_MICROBLAZE_COPY: + if (symbol_addr) { +#if defined (__SUPPORT_LD_DEBUG__) + if (_dl_debug_move) + _dl_dprintf(_dl_debug_file, + "\t%s move %d bytes from %x to %x\n", + symname, sym_ref.sym->st_size, + symbol_addr, reloc_addr); +#endif + + _dl_memcpy((char *)reloc_addr, + (char *)symbol_addr, + sym_ref.sym->st_size); + } +#if defined (__SUPPORT_LD_DEBUG__) + else + _dl_dprintf(_dl_debug_file, "no symbol_addr to copy !?\n"); +#endif + break; + + default: + return -1; /* Calls _dl_exit(1). */ + } + +#if defined (__SUPPORT_LD_DEBUG__) + if (_dl_debug_reloc && _dl_debug_detail) + _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n", + old_val, *reloc_addr, reloc_addr); +#endif + + return 0; +} + +static int +_dl_do_lazy_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, + ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab) +{ + int reloc_type; + int symtab_index; + ElfW(Addr) *reloc_addr; +#if defined (__SUPPORT_LD_DEBUG__) + ElfW(Addr) old_val; +#endif + + (void)scope; + symtab_index = ELF_R_SYM(rpnt->r_info); + (void)strtab; + + reloc_addr = (ElfW(Addr)*)(tpnt->loadaddr + rpnt->r_offset); + reloc_type = ELF_R_TYPE(rpnt->r_info); + +#if defined (__SUPPORT_LD_DEBUG__) + old_val = *reloc_addr; +#endif + + switch (reloc_type) { + case R_MICROBLAZE_NONE: + break; + case R_MICROBLAZE_JUMP_SLOT: + *reloc_addr += (unsigned long)tpnt->loadaddr; + break; + default: + _dl_exit(1); + } + +#if defined (__SUPPORT_LD_DEBUG__) + if (_dl_debug_reloc && _dl_debug_detail) + _dl_dprintf(_dl_debug_file, "\tpatched_lazy: %x ==> %x @ %x\n", + old_val, *reloc_addr, reloc_addr); +#endif + + return 0; +} + +void +_dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, + unsigned long rel_addr, unsigned long rel_size) +{ + (void)_dl_parse(rpnt->dyn, NULL, rel_addr, rel_size, _dl_do_lazy_reloc); +} + +int +_dl_parse_relocation_information(struct dyn_elf *rpnt, + struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size) +{ + return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc); +} diff --git a/ldso/ldso/microblaze/resolve.S b/ldso/ldso/microblaze/resolve.S new file mode 100644 index 000000000..8ad94fe50 --- /dev/null +++ b/ldso/ldso/microblaze/resolve.S @@ -0,0 +1,52 @@ + +/* This code is used in dl-runtime.c to call the `fixup' function + and then redirect to the address it returns. */ +/* We assume that R3 contain relocation offset and R4 contains + link_map (_DYNAMIC). This must be consistent with the JUMP_SLOT + layout generated by binutils. */ + +/* Based on glibc 2.3.6, dl-machine.h */ +/* + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +.text +.align 4 +.globl _dl_linux_resolver +.globl _dl_linux_resolve +.type _dl_linux_resolve,@function + +_dl_linux_resolve: + addik r1,r1,-40 + swi r5,r1,12 + swi r6,r1,16 + swi r7,r1,20 + swi r8,r1,24 + swi r9,r1,28 + swi r10,r1,32 + swi r15,r1,0 + addk r5,r0,r4 + brlid r15, _dl_linux_resolver + addk r6,r0,r3; /* delay slot */ + lwi r10,r1,32 + lwi r9,r1,28 + lwi r8,r1,24 + lwi r7,r1,20 + lwi r6,r1,16 + lwi r5,r1,12 + lwi r15,r1,0 + brad r3 + addik r1,r1,40; /* delay slot */ + .size _dl_linux_resolve, . - _dl_linux_resolve |