diff options
Diffstat (limited to 'toolchain/uClibc/patches/407-ldso-avr32-2.patch')
| -rw-r--r-- | toolchain/uClibc/patches/407-ldso-avr32-2.patch | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/toolchain/uClibc/patches/407-ldso-avr32-2.patch b/toolchain/uClibc/patches/407-ldso-avr32-2.patch new file mode 100644 index 0000000..ddeb84d --- /dev/null +++ b/toolchain/uClibc/patches/407-ldso-avr32-2.patch @@ -0,0 +1,526 @@ +Subject: [PATCH] ldso: AVR32 support + +This implements the AVR32-specific parts of the dynamic linker. + +--- + + ldso/ldso/avr32/dl-debug.h | 45 +++++++++ + ldso/ldso/avr32/dl-startup.h | 110 ++++++++++++++++++++++++ + ldso/ldso/avr32/dl-syscalls.h | 5 + + ldso/ldso/avr32/dl-sysdep.h | 103 ++++++++++++++++++++++ + ldso/ldso/avr32/elfinterp.c | 191 ++++++++++++++++++++++++++++++++++++++++++ + ldso/ldso/avr32/resolve.S | 28 ++++++ + 6 files changed, 482 insertions(+) + +Index: uClibc-0.9.28/ldso/ldso/avr32/dl-debug.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/dl-debug.h 2006-05-05 09:30:43.000000000 +0200 +@@ -0,0 +1,45 @@ ++/* ++ * AVR32 ELF shared libary loader support ++ * ++ * Copyright (C) 2005 Atmel Norway ++ * 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 *_dl_reltypes_tab[] = { ++ "R_AVR32_NONE", ++ "R_AVR32_32", "R_AVR32_16", "R_AVR32_8", ++ "R_AVR32_32_PCREL", "R_AVR32_16_PCREL", "R_AVR32_8_PCREL", ++ "R_AVR32_DIFF32", "R_AVR32_DIFF16", "R_AVR32_DIFF8", ++ "R_AVR32_GOT32", "R_AVR32_GOT16", "R_AVR32_GOT8", ++ "R_AVR32_21S", "R_AVR32_16U", "R_AVR32_16S", "R_AVR32_8S", "R_AVR32_8S_EXT", ++ "R_AVR32_22H_PCREL", "R_AVR32_18W_PCREL", "R_AVR32_16B_PCREL", ++ "R_AVR32_16N_PCREL", "R_AVR32_14UW_PCREL", "R_AVR32_11H_PCREL", ++ "R_AVR32_10UW_PCREL", "R_AVR32_9H_PCREL", "R_AVR32_9UW_PCREL", ++ "R_AVR32_HI16", "R_AVR32_LO16", ++ "R_AVR32_GOTPC", "R_AVR32_GOTCALL", "R_AVR32_LDA_GOT", ++ "R_AVR32_GOT21S", "R_AVR32_GOT18SW", "R_AVR32_GOT16S", "R_AVR32_GOT7UW", ++ "R_AVR32_32_CPENT", "R_AVR32_CPCALL", "R_AVR32_16_CP", "R_AVR32_9W_CP", ++ "R_AVR32_RELATIVE", "R_AVR32_GLOB_DAT", "R_AVR32_JMP_SLOT", ++ "R_AVR32_ALIGN", ++}; +Index: uClibc-0.9.28/ldso/ldso/avr32/dl-startup.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/dl-startup.h 2006-05-05 09:29:45.000000000 +0200 +@@ -0,0 +1,110 @@ ++/* vi: set sw=4 ts=4: */ ++/* ++ * Architecture specific code used by dl-startup.c ++ * Copyright (C) 2005 Atmel Norway ++ */ ++ ++/* This is the library loader's main entry point. Let _dl_boot2 do its ++ * initializations and jump to the application's entry point ++ * afterwards. */ ++asm( " .text\n" ++ " .global _start\n" ++ " .type _start,@function\n" ++ "_start:\n" ++ /* All arguments are on the stack initially */ ++ " mov r12, sp\n" ++ " rcall _dl_start\n" ++ /* Returns user entry point in r12. Save it. */ ++ " mov r0, r12\n" ++ /* We're PIC, so get the Global Offset Table */ ++ " lddpc r6, .L_GOT\n" ++ ".L_RGOT:\n" ++ " rsub r6, pc\n" ++ /* Adjust argc and argv according to _dl_skip_args */ ++ " ld.w r1, r6[_dl_skip_args@got]\n" ++ " ld.w r1, r1[0]\n" ++ " ld.w r2, sp++\n" ++ " sub r2, r1\n" ++ " add sp, sp, r1 << 2\n" ++ " st.w --sp, r2\n" ++ /* Load the finalizer function */ ++ " ld.w r12, r6[_dl_fini@got]\n" ++ /* Jump to the user's entry point */ ++ " mov pc, r0\n\n" ++ ++ " .align 2\n" ++ ".L_GOT:" ++ " .long .L_RGOT - _GLOBAL_OFFSET_TABLE_\n" ++ " .size _start, . - _start\n" ++ " .previous\n"); ++ ++/* Get a pointer to the argv array. On many platforms this can be just ++ * the address if 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) ++ ++ ++/* We can't call functions before the GOT has been initialized */ ++#define NO_FUNCS_BEFORE_BOOTSTRAP ++ ++/* ++ * Relocate the GOT during dynamic loader bootstrap. This will add ++ * the load address to all entries in the GOT, which is necessary ++ * because the linker doesn't generate R_AVR32_RELATIVE relocs for the ++ * GOT. ++ */ ++static __always_inline ++void PERFORM_BOOTSTRAP_GOT(struct elf_resolve *tpnt) ++{ ++ Elf32_Addr i, nr_got; ++ register Elf32_Addr *__r6 __asm__("r6"); ++ Elf32_Addr *got = __r6; ++ ++ nr_got = tpnt->dynamic_info[DT_AVR32_GOTSZ_IDX] / sizeof(*got); ++ for (i = 2; i < nr_got; i++) ++ got[i] += tpnt->loadaddr; ++} ++ ++#define PERFORM_BOOTSTRAP_GOT(tpnt) PERFORM_BOOTSTRAP_GOT(tpnt) ++ ++/* Handle relocation of the symbols in the dynamic loader. */ ++static __always_inline ++void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr, ++ unsigned long symbol_addr, ++ unsigned long load_addr, Elf32_Sym *symtab) ++{ ++ switch(ELF32_R_TYPE(rpnt->r_info)) { ++ case R_AVR32_NONE: ++ break; ++ case R_AVR32_GLOB_DAT: ++ case R_AVR32_JMP_SLOT: ++ *reloc_addr = symbol_addr; ++ break; ++ case R_AVR32_RELATIVE: ++ SEND_STDERR_DEBUG("Applying RELATIVE relocation: "); ++ SEND_ADDRESS_STDERR_DEBUG(load_addr, 0); ++ SEND_STDERR_DEBUG(" + "); ++ SEND_ADDRESS_STDERR_DEBUG(rpnt->r_addend, 1); ++ *reloc_addr = load_addr + rpnt->r_addend; ++ break; ++ default: ++ SEND_STDERR("BOOTSTRAP_RELOC: unhandled reloc_type "); ++ SEND_NUMBER_STDERR(ELF32_R_TYPE(rpnt->r_info), 1); ++ SEND_STDERR("REL, SYMBOL, LOAD: "); ++ SEND_ADDRESS_STDERR(reloc_addr, 0); ++ SEND_STDERR(", "); ++ SEND_ADDRESS_STDERR(symbol_addr, 0); ++ SEND_STDERR(", "); ++ SEND_ADDRESS_STDERR(load_addr, 1); ++ _dl_exit(1); ++ } ++} ++ ++/* Transfer control to the user's application, once the dynamic loader ++ * is done. This routine has to exit the current function, then call ++ * the _dl_elf_main function. ++ * ++ * Since our _dl_boot will simply call whatever is returned by ++ * _dl_boot2, we can just return the address we're supposed to ++ * call. */ ++#define START() return _dl_elf_main; +Index: uClibc-0.9.28/ldso/ldso/avr32/dl-syscalls.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/dl-syscalls.h 2006-05-05 09:29:25.000000000 +0200 +@@ -0,0 +1,5 @@ ++/* We can't use the real errno in ldso, since it has not yet ++ * been dynamicly linked in yet. */ ++extern int _dl_errno; ++#define __set_errno(X) {(_dl_errno) = (X);} ++#include "sys/syscall.h" +Index: uClibc-0.9.28/ldso/ldso/avr32/dl-sysdep.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/dl-sysdep.h 2006-05-05 09:30:43.000000000 +0200 +@@ -0,0 +1,103 @@ ++/* vi: set sw=4 ts=4: */ ++/* ++ * Various assembly language/system dependent hacks that are required ++ * so that we can minimize the amount of platform specific code. ++ * Copyright (C) 2004-2005 Atmel Norway ++ */ ++ ++/* Define this if the system uses RELOCA. */ ++#define ELF_USES_RELOCA ++ ++#include <elf.h> ++ ++#define ARCH_NUM 1 ++#define DT_AVR32_GOTSZ_IDX (DT_NUM + OS_NUM) ++ ++#define ARCH_DYNAMIC_INFO(dpnt, dynamic, debug_addr) \ ++ do { \ ++ if (dpnt->d_tag == DT_AVR32_GOTSZ) \ ++ dynamic[DT_AVR32_GOTSZ_IDX] = dpnt->d_un.d_val; \ ++ } while (0) ++ ++/* Initialization sequence for the application/library GOT. */ ++#define INIT_GOT(GOT_BASE,MODULE) \ ++ do { \ ++ unsigned long i, nr_got; \ ++ \ ++ GOT_BASE[0] = (unsigned long) _dl_linux_resolve; \ ++ GOT_BASE[1] = (unsigned long) MODULE; \ ++ \ ++ /* Add load address displacement to all GOT entries */ \ ++ nr_got = MODULE->dynamic_info[DT_AVR32_GOTSZ_IDX] / 4; \ ++ for (i = 2; i < nr_got; i++) \ ++ GOT_BASE[i] += (unsigned long)MODULE->loadaddr; \ ++ } while (0) ++ ++#define do_rem(result, n, base) ((result) = (n) % (base)) ++ ++/* Here we define the magic numbers that this dynamic loader should accept */ ++#define MAGIC1 EM_AVR32 ++#undef MAGIC2 ++ ++/* Used for error messages */ ++#define ELF_TARGET "AVR32" ++ ++unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got); ++ ++/* 4096 bytes alignment */ ++#define PAGE_ALIGN 0xfffff000 ++#define ADDR_ALIGN 0xfff ++#define OFFS_ALIGN 0x7ffff000 ++ ++#define elf_machine_type_class(type) \ ++ ((type == R_AVR32_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) ++ ++/* AVR32 doesn't need any COPY relocs */ ++#define DL_NO_COPY_RELOCS ++ ++/* 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) ++{ ++ register Elf32_Addr *got asm ("r6"); ++ return *got; ++} ++ ++/* Return the run-time load address of the shared object. */ ++static inline Elf32_Addr ++elf_machine_load_address (void) ++{ ++ extern void __dl_start asm("_dl_start"); ++ Elf32_Addr got_addr = (Elf32_Addr) &__dl_start; ++ Elf32_Addr pcrel_addr; ++ ++ asm (" lddpc %0, 2f\n" ++ "1: add %0, pc\n" ++ " rjmp 3f\n" ++ " .align 2\n" ++ "2: .long _dl_start - 1b\n" ++ "3:\n" ++ : "=r"(pcrel_addr) : : "cc"); ++ ++ return pcrel_addr - got_addr; ++} ++ ++/* ++ * Perform any RELATIVE relocations specified by DT_RELCOUNT. ++ * Currently, we don't use that tag, but we might in the future as ++ * this would reduce the startup time somewhat (although probably not by much). ++ */ ++static inline void ++elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr, ++ Elf32_Word relative_count) ++{ ++ Elf32_Rela *rpnt = (void *)rel_addr; ++ ++ do { ++ Elf32_Addr *reloc_addr; ++ reloc_addr = (void *)(load_off + (rpnt++)->r_offset); ++ *reloc_addr = load_off + rpnt->r_addend; ++ } while (--relative_count); ++} +Index: uClibc-0.9.28/ldso/ldso/avr32/elfinterp.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/elfinterp.c 2006-05-05 09:30:43.000000000 +0200 +@@ -0,0 +1,191 @@ ++/* ++ * AVR32 ELF shared library loader suppport ++ * ++ * Copyright (C) 2004-2006 Atmel Corporation ++ * ++ * 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. ++ */ ++ ++unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got) ++{ ++ struct elf_resolve *tpnt = (struct elf_resolve *)got[1]; ++ Elf32_Sym *sym; ++ unsigned long local_gotno; ++ unsigned long gotsym; ++ unsigned long new_addr; ++ char *strtab, *symname; ++ unsigned long *entry; ++ unsigned long sym_index = got_offset / 4; ++ ++#if 0 ++ local_gotno = tpnt->dynamic_info[DT_AVR32_LOCAL_GOTNO]; ++ gotsym = tpnt->dynamic_info[DT_AVR32_GOTSYM]; ++ ++ sym = ((Elf32_Sym *)(tpnt->dynamic_info[DT_SYMTAB] + tpnt->loadaddr)) ++ + sym_index; ++ strtab = (char *)(tpnt->dynamic_info[DT_STRTAB] + tpnt->loadaddr); ++ symname = strtab + sym->st_name; ++ ++#if 0 ++ new_addr = (unsigned long) _dl_find_hash(strtab + sym->st_name, ++ tpnt->symbol_scope, tpnt, ++ resolver); ++#endif ++ ++ entry = (unsigned long *)(got + local_gotno + sym_index - gotsym); ++ *entry = new_addr; ++#endif ++ ++ return new_addr; ++} ++ ++static int ++_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, ++ unsigned long rel_addr, unsigned long rel_size, ++ int (*reloc_func)(struct elf_resolve *tpnt, struct dyn_elf *scope, ++ Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab)) ++{ ++ Elf32_Sym *symtab; ++ Elf32_Rela *rpnt; ++ char *strtab; ++ int i; ++ ++ rpnt = (Elf32_Rela *)rel_addr; ++ rel_size /= sizeof(Elf32_Rela); ++ symtab = (Elf32_Sym *)tpnt->dynamic_info[DT_SYMTAB]; ++ strtab = (char *)tpnt->dynamic_info[DT_STRTAB]; ++ ++ for (i = 0; i < rel_size; i++, rpnt++) { ++ int symtab_index, res; ++ ++ symtab_index = ELF32_R_SYM(rpnt->r_info); ++ ++ debug_sym(symtab, strtab, symtab_index); ++ debug_reloc(symtab, strtab, rpnt); ++ ++ res = reloc_func(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 (res < 0) { ++ int reloc_type = ELF32_R_TYPE(rpnt->r_info); ++#if defined(__SUPPORT_LD_DEBUG__) ++ _dl_dprintf(2, "can't handle reloc type %s\n", ++ _dl_reltypes(reloc_type)); ++#else ++ _dl_dprintf(2, "can't handle reloc type %x\n", ++ reloc_type); ++#endif ++ _dl_exit(-res); ++ } else { ++ _dl_dprintf(2, "can't resolve symbol\n"); ++ return res; ++ } ++ } ++ ++ return 0; ++} ++ ++static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, ++ Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab) ++{ ++ int reloc_type; ++ int symtab_index; ++ char *symname; ++ unsigned long *reloc_addr; ++ unsigned long symbol_addr; ++#if defined(__SUPPORT_LD_DEBUG__) ++ unsigned long old_val; ++#endif ++ ++ reloc_addr = (unsigned long *)(tpnt->loadaddr + rpnt->r_offset); ++ reloc_type = ELF32_R_TYPE(rpnt->r_info); ++ symtab_index = ELF32_R_SYM(rpnt->r_info); ++ symbol_addr = 0; ++ symname = strtab + symtab[symtab_index].st_name; ++ ++ if (symtab_index) { ++ symbol_addr = (unsigned long) ++ _dl_find_hash(strtab + symtab[symtab_index].st_name, ++ tpnt->symbol_scope, tpnt, ++ elf_machine_type_class(reloc_type)); ++ ++ /* Allow undefined references to weak symbols */ ++ if (!symbol_addr && ++ ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK) { ++ _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", ++ _dl_progname, symname); ++ return 0; ++ } ++ } ++ ++#if defined(__SUPPORT_LD_DEBUG__) ++ old_val = *reloc_addr; ++#endif ++ switch (reloc_type) { ++ case R_AVR32_NONE: ++ break; ++ case R_AVR32_GLOB_DAT: ++ case R_AVR32_JMP_SLOT: ++ *reloc_addr = symbol_addr + rpnt->r_addend; ++ break; ++ case R_AVR32_RELATIVE: ++ *reloc_addr = (unsigned long)tpnt->loadaddr ++ + rpnt->r_addend; ++ break; ++ default: ++ return -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); ++#endif ++ ++ return 0; ++} ++ ++void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, ++ unsigned long rel_addr, ++ unsigned long rel_size) ++{ ++ /* TODO: Might want to support this in order to get faster ++ * startup times... */ ++} ++ ++int _dl_parse_relocation_information(struct dyn_elf *rpnt, ++ unsigned long rel_addr, ++ unsigned long rel_size) ++{ ++ return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size, ++ _dl_do_reloc); ++} +Index: uClibc-0.9.28/ldso/ldso/avr32/resolve.S +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ uClibc-0.9.28/ldso/ldso/avr32/resolve.S 2006-05-05 09:29:25.000000000 +0200 +@@ -0,0 +1,28 @@ ++/* ++ * Linux dynamic resolving code for AVR32. Fixes up the GOT entry as ++ * indicated in register r12 and jumps to the resolved address. ++ * ++ * This file is subject to the terms and conditions of the GNU Lesser General ++ * Public License. See the file "COPYING.LIB" in the main directory of this ++ * archive for more details. ++ * ++ * Copyright (C) 2004 Atmel Norway ++ */ ++ ++#define ip r5 ++ ++ .text ++ .global _dl_linux_resolve ++ .type _dl_linux_resolve,@function ++_dl_linux_resolve: ++ /* The PLT code pushed r8 for us. It contains the address of this ++ function's GOT entry, that is entry 0. ip contains the address ++ of the GOT entry of the function we wanted to call. */ ++ stm --sp, r9-r12, lr ++ mov r11, r8 ++ sub r12, ip, r8 ++ rcall _dl_linux_resolver ++ mov ip, r12 ++ popm r8-r12,lr ++ mov pc, ip ++ .size _dl_linux_resolve, . - _dl_linux_resolve |