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-rw-r--r--ldso/ldso/kvx/dl-startup.h104
-rw-r--r--ldso/ldso/kvx/dl-syscalls.h1
-rw-r--r--ldso/ldso/kvx/dl-sysdep.h99
-rw-r--r--ldso/ldso/kvx/dl-tlsdesc.S33
-rw-r--r--ldso/ldso/kvx/elfinterp.c302
-rw-r--r--ldso/ldso/kvx/resolve.S17
6 files changed, 556 insertions, 0 deletions
diff --git a/ldso/ldso/kvx/dl-startup.h b/ldso/ldso/kvx/dl-startup.h
new file mode 100644
index 000000000..9784c2345
--- /dev/null
+++ b/ldso/ldso/kvx/dl-startup.h
@@ -0,0 +1,104 @@
+/*
+ * Architecture specific code used by dl-startup.c
+ * Copyright (C) 2016 Waldemar Brodkorb <wbx@uclibc-ng.org>
+ * Copyright (C) 2018 Kalray Inc.
+ *
+ * Ported from GNU libc
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1995-2016 Free Software Foundation, Inc.
+
+ 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <features.h>
+
+/* This is the first bit of code, ever, executed in user space of a dynamically
+ * linked ELF.
+ * The kernel jumps on this with the following stack layout:
+ * argc argument counter (integer)
+ * argv[0] program name (pointer)
+ * argv[1..argc-1] program args (pointers)
+ * NULL
+ * env[0...N] environment variables (pointers)
+ * NULL
+ * auxvt[0...N] Auxiliary Vector Table elements (mixed types)
+ *
+ * We should call _dl_start($sp) (the argument should point to the previously
+ * described memory layout).
+ *
+ * Next we should skip N arguments (N == _dl_skip_args).
+ * Those correspond to the arguments which are consumed by the dynamic loader
+ * if it is called directly as a program, which is possible when
+ * __LDSO_STANDALONE_SUPPORT__ is defined.
+ *
+ * We eventually end up calling the main executable's _start (from ctr1.S).
+ * The address of this _start is returned by _dl_start (in $r0).
+ *
+ * We should call this with one argument (in $r0): the address of _dl_fini()
+ */
+__asm__("\
+.text \n\
+.globl _start \n\
+.type _start, %function \n\
+_start: \n\
+ copyd $r0 = $sp \n\
+ copyd $r18 = $sp \n\
+ andd $sp = $sp, -32 \n\
+ call _dl_start \n\
+ ;; \n\
+.globl _dl_start_user \n\
+.type _dl_start_user, %function \n\
+_dl_start_user: \n\
+ pcrel $r1 = @gotaddr() \n\
+ copyd $r5 = $r0 \n\
+ copyd $sp = $r18 \n\
+ ;; \n\
+ ld $r2 = @gotoff(_dl_skip_args)[$r1] \n\
+ addd $r0 = $r1, @gotoff(_dl_fini) \n\
+ ;; \n\
+ lwz $r3 = 0[$sp] \n\
+ ;; \n\
+ sbfw $r4 = $r2, $r3 \n\
+ addx8d $sp = $r2, $sp \n\
+ ;; \n\
+ sd 0[$sp] = $r4 \n\
+ icall $r5 \n\
+ ;; \n\
+");
+
+/* 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)
+
+/* Handle relocation of the symbols in the dynamic loader. */
+static __always_inline
+void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, ElfW(Addr) *reloc_addr,
+ ElfW(Addr) symbol_addr, ElfW(Addr) load_addr, ElfW(Sym) *sym)
+{
+ switch (ELF_R_TYPE(rpnt->r_info)) {
+ case R_KVX_NONE:
+ break;
+ case R_KVX_JMP_SLOT:
+ *reloc_addr = symbol_addr + rpnt->r_addend;
+ break;
+ case R_KVX_RELATIVE:
+ *reloc_addr = load_addr + rpnt->r_addend;
+ break;
+ default:
+ _dl_exit(1);
+ }
+}
diff --git a/ldso/ldso/kvx/dl-syscalls.h b/ldso/ldso/kvx/dl-syscalls.h
new file mode 100644
index 000000000..f40c4fd31
--- /dev/null
+++ b/ldso/ldso/kvx/dl-syscalls.h
@@ -0,0 +1 @@
+/* stub for arch-specific syscall issues */
diff --git a/ldso/ldso/kvx/dl-sysdep.h b/ldso/ldso/kvx/dl-sysdep.h
new file mode 100644
index 000000000..9bb20ca8e
--- /dev/null
+++ b/ldso/ldso/kvx/dl-sysdep.h
@@ -0,0 +1,99 @@
+/*
+ * Various assembly language/system dependent hacks that are required
+ * so that we can minimize the amount of platform specific code.
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2017-2018 by Waldemar Brodkorb <wbx@uclibc-ng.org>
+ * Copyright (C) 2018 Kalray Inc.
+
+ * Ported from GNU C Library
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1995-2017 Free Software Foundation, Inc.
+
+ 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, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Defines that this system uses RELOCA. */
+#define ELF_USES_RELOCA
+
+#include <elf.h>
+#include <link.h>
+
+/* Initialization sequence for the GOT. */
+#define INIT_GOT(GOT_BASE,MODULE) \
+{ \
+ GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
+ GOT_BASE[1] = (unsigned long) MODULE; \
+}
+
+/* Here we define the magic numbers that this dynamic loader should accept */
+#define MAGIC1 EM_KVX
+#undef MAGIC2
+
+/* Used for error messages */
+#define ELF_TARGET "kvx"
+
+#define ARCH_NEEDS_BOOTSTRAP_RELOCS
+
+struct elf_resolve;
+unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
+
+#define elf_machine_type_class(type) \
+ ((((type) == R_KVX_JMP_SLOT || (type) == R_KVX_64_DTPMOD || \
+ (type) == R_KVX_64_DTPOFF \
+ || (type) == R_KVX_64_TPOFF) \
+ * ELF_RTYPE_CLASS_PLT) \
+ | (((type) == R_KVX_COPY) * ELF_RTYPE_CLASS_COPY))
+
+/* Return the link-time address of _DYNAMIC. Conveniently, this is the
+ first element of the GOT. */
+extern const ElfW(Addr) _GLOBAL_OFFSET_TABLE_[] attribute_hidden;
+static __always_inline ElfW(Addr) __attribute__ ((unused))
+elf_machine_dynamic (void)
+{
+ unsigned long *ptr;
+ __asm__("\n"
+ "pcrel %0 = @gotaddr()\n"
+ ";;\n" : "=r"(ptr) :: );
+ return *ptr;
+}
+
+/* Return the run-time load address of the shared object. */
+
+static __always_inline ElfW(Addr) __attribute__ ((unused))
+elf_machine_load_address (void)
+{
+ /* To figure out the load address we use the definition that for any symbol:
+ dynamic_addr(symbol) = static_addr(symbol) + load_addr
+
+ _DYNAMIC sysmbol is used here as its link-time address stored in
+ the special unrelocated first GOT entry. */
+
+ extern ElfW(Dyn) _DYNAMIC[] attribute_hidden;
+ return (ElfW(Addr)) &_DYNAMIC - elf_machine_dynamic ();
+}
+
+static __always_inline void
+elf_machine_relative(Elf64_Addr load_off, const Elf64_Addr rel_addr,
+ Elf64_Word relative_count)
+{
+ Elf64_Rela *rpnt = (Elf64_Rela*)rel_addr;
+ --rpnt;
+ do {
+ Elf64_Addr *const reloc_addr = (Elf64_Addr*)(load_off + (++rpnt)->r_offset);
+
+ *reloc_addr = load_off + rpnt->r_addend;
+ } while (--relative_count);
+}
diff --git a/ldso/ldso/kvx/dl-tlsdesc.S b/ldso/ldso/kvx/dl-tlsdesc.S
new file mode 100644
index 000000000..d0a55b985
--- /dev/null
+++ b/ldso/ldso/kvx/dl-tlsdesc.S
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2018 Kalray Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#if defined __UCLIBC_HAS_TLS__
+#error NOT IMPLEMENTED: THIS IS A SKELETON
+ .text
+
+ .hidden _dl_tlsdesc_return
+ .global _dl_tlsdesc_return
+ .type _dl_tlsdesc_return,%function
+ .align 2
+_dl_tlsdesc_return:
+ errop
+ ;;
+.size _dl_tlsdesc_return, .-_dl_tlsdesc_return
+
+#ifdef SHARED
+
+ .hidden _dl_tlsdesc_dynamic
+ .global _dl_tlsdesc_dynamic
+ .type _dl_tlsdesc_dynamic,%function
+ cfi_startproc
+ .align 2
+_dl_tlsdesc_dynamic:
+ errop
+ ;;
+ cfi_endproc
+ .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic
+
+#endif // SHARED
+#endif // __UCLIBC_HAS_TLS__
diff --git a/ldso/ldso/kvx/elfinterp.c b/ldso/ldso/kvx/elfinterp.c
new file mode 100644
index 000000000..9efcf83ff
--- /dev/null
+++ b/ldso/ldso/kvx/elfinterp.c
@@ -0,0 +1,302 @@
+/* KVX ELF shared library loader suppport
+ *
+ * Copyright (C) 2001-2004 Erik Andersen
+ * Copyright (C) 2016-2017 Waldemar Brodkorb <wbx@uclibc-ng.org>
+ * Copyright (C) 2018 Kalray Inc.
+ *
+ * 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.
+ */
+
+/* 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. */
+
+#include "ldso.h"
+
+#if defined(USE_TLS) && USE_TLS
+#include "dl-tls.h"
+#include "tlsdeschtab.h"
+#endif
+
+extern int _dl_linux_resolve(void);
+
+/* Uncomment when some relocs will be handled lazily */
+#if 0
+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 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 (_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", *got_addr, new_addr, got_addr);
+ }
+ if (!_dl_debug_nofixups) {
+ *got_addr = new_addr;
+ }
+#else
+ *got_addr = new_addr;
+#endif
+ return (unsigned long)new_addr;
+}
+#endif
+
+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 = 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 %x\n", reloc_type);
+ _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 = NULL;
+#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(symtab[symtab_index].st_info) != STT_TLS) &&
+ (ELF_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK))) {
+ return 1;
+ }
+ if (_dl_trace_prelink) {
+ _dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
+ &sym_ref, elf_machine_type_class(reloc_type));
+ }
+#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__)
+ old_val = *reloc_addr;
+#endif
+
+ switch (reloc_type) {
+ case R_KVX_NONE:
+ break;
+ case R_KVX_GLOB_DAT:
+ case R_KVX_64:
+ case R_KVX_JMP_SLOT:
+ *reloc_addr = symbol_addr + rpnt->r_addend;
+ break;
+ case R_KVX_COPY:
+ if (symbol_addr) {
+ _dl_memcpy((char *)reloc_addr, (char *)symbol_addr,
+ sym_ref.sym->st_size);
+ }
+ break;
+
+#if defined USE_TLS && USE_TLS
+ case R_KVX_64_TPOFF:
+ CHECK_STATIC_TLS ((struct link_map *) tls_tpnt);
+ *reloc_addr = tls_tpnt->l_tls_offset + symbol_addr + rpnt->r_addend - TLS_TCB_SIZE;
+ break;
+ case R_KVX_64_DTPMOD:
+ *reloc_addr = tls_tpnt->l_tls_modid;
+ break;
+ case R_KVX_64_DTPOFF:
+ *reloc_addr = symbol_addr;
+ break;
+#endif
+ default:
+ return -1; /*call _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;
+}
+
+/* uncomment when PLT relocs will be handled lazily */
+#if 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;
+ ElfW(Addr) *reloc_addr;
+#if defined (__SUPPORT_LD_DEBUG__)
+ ElfW(Addr) old_val;
+#endif
+
+ (void)scope;
+ (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_KVX_NONE:
+ break;
+ case R_KVX_JMP_SLOT64:
+ *reloc_addr += tpnt->loadaddr;
+ break;
+#if defined USE_TLS && USE_TLS
+#error Not even close to be ready
+#endif
+ default:
+ return -1; /*call _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;
+}
+#endif
+
+void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
+ unsigned long rel_addr, unsigned long rel_size)
+{
+ (void)_dl_parse(rpnt->dyn, &_dl_loaded_modules->symbol_scope, rel_addr, rel_size, _dl_do_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/kvx/resolve.S b/ldso/ldso/kvx/resolve.S
new file mode 100644
index 000000000..6e7c3143c
--- /dev/null
+++ b/ldso/ldso/kvx/resolve.S
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2018 Kalray Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#warning NOT IMPLEMENTED: THIS IS A SKELETON
+
+ .text
+ .globl _dl_linux_resolve
+ .type _dl_linux_resolve, %function
+ .align 2
+
+_dl_linux_resolve:
+ errop
+ ;;
+
+.size _dl_linux_resolve, .-_dl_linux_resolve
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 02:57:33 +0000