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0501d60367
1997-05-24 03:51 Ulrich Drepper <drepper@cygnus.com> * stdlib/Makefile (routines): Add strtol_l, strtoul_l, strtoll_l, strtoull_l, strtof_l, strtod_l, and strtold_l. * stdlib/stdlib.h: Add prototypes for new functions. * stdlib/strtod.c: Change for compiling as strtoX_l. * stdlib/strtol.c: Likewise. * stdlib/strtof.c: Likewise. * stdlib/strtold.c: Likewise. * stdlib/strtod_l.c: New file. * stdlib/strtof_l.c: New file. * stdlib/strtold_l.c: New file. * stdlib/strtol_l.c: New file. * stdlib/strtoul_l.c: New file. * stdlib/strtoll_l.c: New file. * stdlib/strtoull_l.c: New file. * string/Makefile (routines): Add strcasecmp_l and strncase_l. * string/string.h: Add prototypes for new functions. * sysdeps/generic/strcasecmp.c: Change for compiling as strcasecmp_l. * sysdeps/generic/strncase.c: Change for compiling as strncasecmp_l. * sysdeps/generic/strcasecmp_l.c: New file. * sysdeps/generic/strncase_l.c: New file. * wcsmbs/Makefile (routines): Add wcstol_l, wcstoul_l, wcstoll_l, wcstoull_l, wcstod_l, wcstold_l, wcstof_l, wcscasecmp_l, and wcsncase_l. * wcsmbs/wchar.h: Add prototypes for new functions. * wcsmbs/wcscasecmp.c: Change for compiling as wcscasecmp_l. * wcsmbs/wcsncase.c: Change for compiling as wcsncasecmp_l. * wcsmbs/wcscasecmp_l.c: New file. * wcsmbs/wcsncase_l.c: New file. * wcsmbs/wcstof.c: Change for compiling as wcstof_l.c * wcsmbs/wcstold.c: Change for compiling as wcstold_l.c * wcsmcs/wcstod_l.c: New file. * wcsmcs/wcstof_l.c: New file. * wcsmcs/wcstold_l.c: New file. * wcsmcs/wcstol_l.c: New file. * wcsmcs/wcstoul_l.c: New file. * wcsmcs/wcstoll_l.c: New file. * wcsmcs/wcstoull_l.c: New file. * Makeconfig (binfmt-subdir): New variable. Set to `elf' if $(elf) is defined. More to come later when other binary formats are supported. * Makefile (subdirs): Remove elf. Add $(binfmt-subdir). Suggested by Philip Blundell. * stdlib/Makefile (headers): Add fmtmsg.h. (routines): Add fmtmsg. * stdlib/fmtmsg.c: New file. * stdlib/fmtmsg.h: New file. * manual/stdio.texi: Add description of fmtmsg and addseverity. * manual/examples/fmtmsgexpl.c: Example program for fmtmsg documentation. 1997-05-23 15:26 Philip Blundell <pjb27@cam.ac.uk> * resolv/res_query.c (res_querydomain): Avoid potential buffer overrun. Reported by Dan A. Dickey <ddickey@transition.com>. 1997-05-22 18:36 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> * elf/dl-support.c (_dl_sysdep_open_zero_fill, _dl_sysdep_read_whole_file): Moved functions to ... * elf/dl-misc.c: This new file. * sysdeps/generic/dl-sysdepio.c: Delete file and move functions... * elf/dl-misc.c: ... here. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_open_zero_fill, _dl_sysdep_read_whole_file): Delete functions; they now come from elf/dl-misc.c (dl-support.c had contained identical versions). * sysdeps/mach/hurd/dl-sysdepio.c: Delete file; move functions... * sysdeps/mach/hurd/dl-sysdep.c: ... here, but mark them weak so that the regular ones in dl-misc work once we've initialized. * elf/Makefile (dl-routines): Remove dl-sysdepio.c. Add dl-misc.c. 1997-05-22 21:55 Philip Blundell <pjb27@cam.ac.uk> * inet/Makefile (headers): Add netinet/inbits.h. * inet/netinet/in.h: New file. * sysdeps/generic/netinet/inbits.h: Likewise. * sysdeps/unix/sysv/linux/netinet/inbits.h: Likewise. * sysdeps/generic/netinet/ip6.h: Move to... * inet/netinet/ip6.h: ... here. * sysdeps/generic/netinet/icmp6.h: Move to... * inet/netinet/icmp6.h: ... here. * sysdeps/unix/sysv/linux/netinet/in.h: Remove. * sysdeps/generic/netinet/in.h: Remove. 1997-05-22 05:40 Richard Henderson <rth@tamu.edu> * sysdeps/alpha/dl-machine.h (elf_machine_runtime_setup): If we are not looking at the new thread-safe .plt, don't be lazy about relocs. (_dl_runtime_resolve): Fix up arithmetic for new .plt layout. (elf_alpha_fix_plt): Insert wmb as appropriate to ensure safety. * elf/dynamic-link.h (ELF_DYNAMIC_RELOCATE): Let elf_machine_runtime_setup() decide if we can actually be lazy. * elf/rtld.c (_dl_start): So don't call it. * elf/dl-reloc.c (_dl_relocate_object): Likewise. * sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Return lazy. * sysdeps/m68k/dl-machine.h (elf_machine_runtime_setup): Likewise. * sysdeps/mips/dl-machine.h (elf_machine_runtime_setup): Likewise. * sysdeps/powerpc/dl-machine.h (elf_machine_runtime_setup): Likewise. * sysdeps/sparc/dl-machine.h (elf_machine_runtime_setup): Likewise. * sysdeps/stub/dl-machine.h (elf_machine_runtime_setup): Update skeleton definition. 1997-05-22 18:45 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/fpu/__math.h (logb): Remove second value placed on stack by fxtract. 1997-05-22 13:07 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sunrpc/rpcsvc/rusers.x: Provide and correct prototypes, add cast to (xdrproc_t) where necessary to prevent warnings. 1997-05-22 12:18 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Remove I/O functions. * sunrpc/rpcinfo.c (get_inet_address): Use INADDR_NONE and INADDR_ANY * sysdeps/libm-ieee754/s_cexp.c: Fix typo: string_alias -> * nss/XXX-lookup.c: Add missing explanation.
478 lines
14 KiB
C
478 lines
14 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. MIPS version.
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Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Kazumoto Kojima <kkojima@info.kanagawa-u.ac.jp>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#define ELF_MACHINE_NAME "MIPS"
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#include <assert.h>
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#include <string.h>
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#include <link.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <unistd.h>
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/* Translate a processor specific dynamic tag to the index
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in l_info array. */
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#define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM)
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#if 1
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/* XXX If FLAGS has the MAP_ALIGN bit, we need 64k alignment. */
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#ifndef MAP_ALIGN
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#define MAP_ALIGN 0x1000
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#endif
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#define ELF_MACHINE_ALIGN_MASK(flags) ((flags & MAP_ALIGN) ? 0xffff : 0)
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#endif
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/* If there is a DT_MIPS_RLD_MAP entry in the dynamic section, fill it in
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with the run-time address of the r_debug structure */
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#define ELF_MACHINE_SET_DEBUG(l,r) \
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do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \
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*(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \
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(ElfW(Addr)) (r); \
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} while (0)
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/* Return nonzero iff E_MACHINE is compatible with the running host. */
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static inline int
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elf_machine_matches_host (ElfW(Half) e_machine)
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{
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switch (e_machine)
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{
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case EM_MIPS:
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case EM_MIPS_RS4_BE:
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return 1;
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default:
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return 0;
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}
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}
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static inline ElfW(Addr) *
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elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
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{
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/* FIXME: the offset of gp from GOT may be system-dependent. */
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return (ElfW(Addr) *) (gpreg - 0x7ff0);
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}
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/* Return the link-time address of _DYNAMIC. Conveniently, this is the
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first element of the GOT. This must be inlined in a function which
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uses global data. */
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static inline ElfW(Addr)
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elf_machine_dynamic (void)
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{
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register ElfW(Addr) gp asm ("$28");
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return * (ElfW(Addr) *) (gp - 0x7ff0);
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}
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/* Return the run-time load address of the shared object. */
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static inline ElfW(Addr)
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elf_machine_load_address (void)
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{
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ElfW(Addr) addr;
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asm (" .set noreorder\n"
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" la %0, here\n"
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" bltzal $0, here\n"
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" nop\n"
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"here: subu %0, $31, %0\n"
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" .set reorder\n"
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: "=r" (addr));
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return addr;
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}
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/* The MSB of got[1] of a gnu object is set to identify gnu objects. */
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#define ELF_MIPS_GNU_GOT1_MASK 0x80000000
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/* Relocate GOT. */
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static void
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elf_machine_got_rel (struct link_map *map)
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{
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ElfW(Addr) *got;
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ElfW(Sym) *sym;
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int i, n;
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struct link_map **scope;
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const char *strtab
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= ((void *) map->l_addr + map->l_info[DT_STRTAB]->d_un.d_ptr);
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ElfW(Addr) resolve (const ElfW(Sym) *sym)
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{
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const ElfW(Sym) *ref = sym;
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ElfW(Addr) sym_loadaddr;
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sym_loadaddr = _dl_lookup_symbol (strtab + sym->st_name, &ref, scope,
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map->l_name, 0, 1);
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return (ref)? sym_loadaddr + ref->st_value: 0;
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}
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got = (ElfW(Addr) *) ((void *) map->l_addr
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+ map->l_info[DT_PLTGOT]->d_un.d_ptr);
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/* got[0] is reserved. got[1] is also reserved for the dynamic object
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generated by gnu ld. Skip these reserved entries from relocation. */
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i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2: 1;
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n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
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/* Add the run-time display to all local got entries. */
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while (i < n)
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got[i++] += map->l_addr;
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/* Set scope. */
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scope = _dl_object_relocation_scope (map);
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/* Handle global got entries. */
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got += n;
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sym = (ElfW(Sym) *) ((void *) map->l_addr
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+ map->l_info[DT_SYMTAB]->d_un.d_ptr);
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sym += map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
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i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val
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- map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val);
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while (i--)
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{
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if (sym->st_shndx == SHN_UNDEF)
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{
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if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC)
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{
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if (sym->st_value /* && maybe_stub (sym->st_value) */)
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*got = sym->st_value + map->l_addr;
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else
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*got = resolve (sym);
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}
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else /* if (*got == 0 || *got == QS) */
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*got = resolve (sym);
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}
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else if (sym->st_shndx == SHN_COMMON)
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*got = resolve (sym);
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else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
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&& *got != sym->st_value
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/* && maybe_stub (*got) */)
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*got += map->l_addr;
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else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION
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&& ELFW(ST_BIND) (sym->st_info) == STB_GLOBAL)
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{
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if (sym->st_other == 0 && sym->st_shndx == SHN_ABS)
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*got = sym->st_value + map->l_addr; /* only for _gp_disp */
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/* else SGI stuff ignored */
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}
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else
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*got = resolve (sym);
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got++;
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sym++;
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}
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*_dl_global_scope_end = NULL;
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return;
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}
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/* The MIPS never uses Elfxx_Rela relocations. */
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#define ELF_MACHINE_NO_RELA 1
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/* Set up the loaded object described by L so its stub function
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will jump to the on-demand fixup code in dl-runtime.c. */
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static inline int
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elf_machine_runtime_setup (struct link_map *l, int lazy)
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{
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ElfW(Addr) *got;
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extern void _dl_runtime_resolve (ElfW(Word));
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if (lazy)
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{
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/* The GOT entries for functions have not yet been filled in.
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Their initial contents will arrange when called to put an
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offset into the .dynsym section in t8, the return address
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in t7 and then jump to _GLOBAL_OFFSET_TABLE[0]. */
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got = (ElfW(Addr) *) ((void *) l->l_addr
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+ l->l_info[DT_PLTGOT]->d_un.d_ptr);
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/* This function will get called to fix up the GOT entry indicated by
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the register t8, and then jump to the resolved address. */
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got[0] = (ElfW(Addr)) &_dl_runtime_resolve;
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/* Store l to _GLOBAL_OFFSET_TABLE[1] for gnu object. The MSB
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of got[1] of a gnu object is set to identify gnu objects.
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Where we can store l for non gnu objects? XXX */
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if ((got[1] & ELF_MIPS_GNU_GOT1_MASK) != 0)
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got[1] = (ElfW(Addr)) ((unsigned) l | ELF_MIPS_GNU_GOT1_MASK);
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else
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; /* Do nothing. */
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}
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/* Relocate global offset table. */
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elf_machine_got_rel (l);
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return lazy;
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}
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/* Get link_map for this object. */
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static inline struct link_map *
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elf_machine_runtime_link_map (ElfW(Addr) gpreg)
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{
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ElfW(Addr) *got = elf_mips_got_from_gpreg (gpreg);
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ElfW(Word) g1;
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g1 = ((ElfW(Word) *) got)[1];
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/* got[1] is reserved to keep its link map address for the shared
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object generated by gnu linker. If not so, we must search GOT
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in object list slowly. XXX */
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if ((g1 & ELF_MIPS_GNU_GOT1_MASK) != 0)
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return (struct link_map *) (g1 & ~ELF_MIPS_GNU_GOT1_MASK);
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else
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{
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struct link_map *l = _dl_loaded;
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while (l)
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{
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if (got == (ElfW(Addr) *) ((void *) l->l_addr
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+ l->l_info[DT_PLTGOT]->d_un.d_ptr))
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return l;
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l = l->l_next;
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}
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}
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_dl_signal_error (0, NULL, "cannot find runtime link map");
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}
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/* Mips has no PLT but define elf_machine_relplt to be elf_machine_rel. */
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#define elf_machine_relplt elf_machine_rel
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/* Define mips specific runtime resolver. The function __dl_runtime_resolve
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is called from assembler function _dl_runtime_resolve which converts
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special argument registers t7 ($15) and t8 ($24):
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t7 address to return to the caller of the function
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t8 index for this function symbol in .dynsym
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to usual c arguments. */
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#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
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/* This is called from assembly stubs below which the compiler can't see. */ \
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static ElfW(Addr) __dl_runtime_resolve (ElfW(Word), ElfW(Word), ElfW(Addr)) \
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__attribute__ ((unused)); \
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\
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static ElfW(Addr) \
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__dl_runtime_resolve (ElfW(Word) sym_index,\
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ElfW(Word) return_address,\
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ElfW(Addr) old_gpreg)\
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{\
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struct link_map *l = elf_machine_runtime_link_map (old_gpreg);\
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const ElfW(Sym) *const symtab\
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= (const ElfW(Sym) *) (l->l_addr + l->l_info[DT_SYMTAB]->d_un.d_ptr);\
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const char *strtab\
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= (void *) (l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);\
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const ElfW(Addr) *got\
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= (const ElfW(Addr) *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr);\
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const ElfW(Word) local_gotno\
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= (const ElfW(Word)) l->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;\
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const ElfW(Word) gotsym\
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= (const ElfW(Word)) l->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;\
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const ElfW(Sym) *definer;\
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ElfW(Addr) loadbase;\
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ElfW(Addr) funcaddr;\
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struct link_map **scope;\
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\
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/* Look up the symbol's run-time value. */\
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scope = _dl_object_relocation_scope (l);\
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definer = &symtab[sym_index];\
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\
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loadbase = _dl_lookup_symbol (strtab + definer->st_name, &definer,\
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scope, l->l_name, 0, 1);\
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\
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*_dl_global_scope_end = NULL;\
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\
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/* Apply the relocation with that value. */\
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funcaddr = loadbase + definer->st_value;\
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*(got + local_gotno + sym_index - gotsym) = funcaddr;\
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\
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return funcaddr;\
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}\
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\
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asm ("\n\
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.text\n\
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.align 2\n\
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.globl _dl_runtime_resolve\n\
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.type _dl_runtime_resolve,@function\n\
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.ent _dl_runtime_resolve\n\
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_dl_runtime_resolve:\n\
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.set noreorder\n\
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# Save old GP to $3.\n\
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move $3,$28\n\
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# Modify t9 ($25) so as to point .cpload instruction.\n\
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addu $25,8\n\
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# Compute GP.\n\
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.cpload $25\n\
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.set reorder\n\
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# Save arguments and sp value in stack.\n\
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subu $29, 40\n\
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.cprestore 32\n\
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sw $15, 36($29)\n\
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sw $4, 12($29)\n\
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sw $5, 16($29)\n\
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sw $6, 20($29)\n\
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sw $7, 24($29)\n\
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sw $16, 28($29)\n\
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move $16, $29\n\
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move $4, $24\n\
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move $5, $15\n\
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move $6, $3\n\
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jal __dl_runtime_resolve\n\
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move $29, $16\n\
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lw $31, 36($29)\n\
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lw $4, 12($29)\n\
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lw $5, 16($29)\n\
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lw $6, 20($29)\n\
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lw $7, 24($29)\n\
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lw $16, 28($29)\n\
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addu $29, 40\n\
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move $25, $2\n\
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jr $25\n\
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.end _dl_runtime_resolve\n\
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");
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/* Mask identifying addresses reserved for the user program,
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where the dynamic linker should not map anything. */
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#define ELF_MACHINE_USER_ADDRESS_MASK 0x00000000UL
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/* Initial entry point code for the dynamic linker.
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|
The C function `_dl_start' is the real entry point;
|
|
its return value is the user program's entry point. */
|
|
|
|
#define RTLD_START asm ("\
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|
.text\n\
|
|
.globl _start\n\
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|
.globl _dl_start_user\n\
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|
.ent _start\n\
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|
_start:\n\
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|
.set noreorder\n\
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|
bltzal $0, 0f\n\
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|
nop\n\
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|
0: .cpload $31\n\
|
|
.set reorder\n\
|
|
# i386 ABI book says that the first entry of GOT holds\n\
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|
# the address of the dynamic structure. Though MIPS ABI\n\
|
|
# doesn't say nothing about this, I emulate this here.\n\
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|
la $4, _DYNAMIC\n\
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|
sw $4, -0x7ff0($28)\n\
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move $4, $29\n\
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jal _dl_start\n\
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|
# Get the value of label '_dl_start_user' in t9 ($25).\n\
|
|
la $25, _dl_start_user\n\
|
|
_dl_start_user:\n\
|
|
.set noreorder\n\
|
|
.cpload $25\n\
|
|
.set reorder\n\
|
|
move $16, $28\n\
|
|
# Save the user entry point address in saved register.\n\
|
|
move $17, $2\n\
|
|
# See if we were run as a command with the executable file\n\
|
|
# name as an extra leading argument.\n\
|
|
lw $2, _dl_skip_args\n\
|
|
beq $2, $0, 1f\n\
|
|
# Load the original argument count.\n\
|
|
lw $4, 0($29)\n\
|
|
# Subtract _dl_skip_args from it.\n\
|
|
subu $4, $2\n\
|
|
# Adjust the stack pointer to skip _dl_skip_args words.\n\
|
|
sll $2,2\n\
|
|
addu $29, $2\n\
|
|
# Save back the modified argument count.\n\
|
|
sw $4, 0($29)\n\
|
|
# Get _dl_default_scope[2] as argument in _dl_init_next call below.\n\
|
|
1: la $2, _dl_default_scope\n\
|
|
lw $4, 8($2)\n\
|
|
# Call _dl_init_next to return the address of an initializer\n\
|
|
# function to run.\n\
|
|
jal _dl_init_next\n\
|
|
move $28, $16\n\
|
|
# Check for zero return, when out of initializers.\n\
|
|
beq $2, $0, 2f\n\
|
|
# Call the shared object initializer function.\n\
|
|
move $25, $2\n\
|
|
lw $4, 0($29)\n\
|
|
lw $5, 4($29)\n\
|
|
lw $6, 8($29)\n\
|
|
lw $7, 12($29)\n\
|
|
jalr $25\n\
|
|
move $28, $16\n\
|
|
# Loop to call _dl_init_next for the next initializer.\n\
|
|
b 1b\n\
|
|
# Pass our finalizer function to the user in ra.\n\
|
|
2: la $31, _dl_fini\n\
|
|
# Jump to the user entry point.\n\
|
|
move $25, $17\n\
|
|
lw $4, 0($29)\n\
|
|
lw $5, 4($29)\n\
|
|
lw $6, 8($29)\n\
|
|
lw $7, 12($29)\n\
|
|
jr $25\n\
|
|
.end _start\n\
|
|
");
|
|
|
|
#ifdef RESOLVE
|
|
|
|
/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
|
|
MAP is the object containing the reloc. */
|
|
|
|
static inline void
|
|
elf_machine_rel (struct link_map *map, const ElfW(Rel) *reloc,
|
|
const ElfW(Sym) *sym, const struct r_found_version *version)
|
|
{
|
|
ElfW(Addr) *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
|
|
ElfW(Addr) loadbase, undo;
|
|
|
|
switch (ELFW(R_TYPE) (reloc->r_info))
|
|
{
|
|
case R_MIPS_REL32:
|
|
if (ELFW(ST_BIND) (sym->st_info) == STB_LOCAL
|
|
&& (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION
|
|
|| ELFW(ST_TYPE) (sym->st_info) == STT_NOTYPE))
|
|
*reloc_addr += map->l_addr;
|
|
else
|
|
{
|
|
#ifndef RTLD_BOOTSTRAP
|
|
/* This is defined in rtld.c, but nowhere in the static libc.a;
|
|
make the reference weak so static programs can still link. This
|
|
declaration cannot be done when compiling rtld.c (i.e. #ifdef
|
|
RTLD_BOOTSTRAP) because rtld.c contains the common defn for
|
|
_dl_rtld_map, which is incompatible with a weak decl in the same
|
|
file. */
|
|
weak_extern (_dl_rtld_map);
|
|
if (map == &_dl_rtld_map)
|
|
/* Undo the relocation done here during bootstrapping. Now we will
|
|
relocate it anew, possibly using a binding found in the user
|
|
program or a loaded library rather than the dynamic linker's
|
|
built-in definitions used while loading those libraries. */
|
|
undo = map->l_addr + sym->st_value;
|
|
else
|
|
#endif
|
|
undo = 0;
|
|
loadbase = RESOLVE (&sym, version, 0);
|
|
*reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
|
|
}
|
|
break;
|
|
case R_MIPS_NONE: /* Alright, Wilbur. */
|
|
break;
|
|
default:
|
|
assert (! "unexpected dynamic reloc type");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
elf_machine_lazy_rel (struct link_map *map, const ElfW(Rel) *reloc)
|
|
{
|
|
/* Do nothing. */
|
|
}
|
|
|
|
#endif /* RESOLVE */
|