+2008-10-01 Mark Shinwell <shinwell@codesourcery.com>
+ Daniel Jacobowitz <dan@codesourcery.com>
+ Richard Sandiford <rdsandiford@googlemail.com>
+
+ * sysdeps/mips/dl-dtprocnum.h (DT_MIPS_NUM): Redefine.
+ * sysdeps/mips/dl-lookup.c: New.
+ * sysdeps/mips/do-lookup.h: New.
+ * sysdeps/mips/dl-machine.h (ELF_MACHINE_NO_PLT): Remove
+ definition.
+ (STO_MIPS_PLT, R_MIPS_COPY, R_MIPS_JUMP_SLOT, DT_MIPS_PLTGOT): Define
+ if needed.
+ (ELF_MACHINE_JMP_SLOT): Alter definition and update comment.
+ (elf_machine_type_class): Likewise.
+ (ELF_MACHINE_PLT_REL): Define.
+ (elf_machine_fixup_plt): New.
+ (elf_machine_plt_value): New.
+ (elf_machine_reloc): Handle jump slot and copy relocations.
+ (elf_machine_lazy_rel): Point relocation place at PLT if
+ required.
+ (RESOLVE_GOTSYM): Take a relocation type argument.
+ (elf_machine_got_rel): Bind lazy stubs directly to their target if
+ !lazy. Skip lazy binding for PLT symbols.
+ (elf_machine_runtime_setup): Fill in .got.plt header.
+ * sysdeps/mips/dl-trampoline.c (IFNEWABI): New macro.
+ (ELF_DL_PLT_FRAME_SIZE, ELF_DL_PLT_SAVE_ARG_REGS,
+ ELF_DL_PLT_RESTORE_ARG_REGS): Define.
+ (_dl_runtime_pltresolve): New.
+ * sysdeps/mips/bits/linkmap.h: New file.
+ * sysdeps/mips/tls-macros.h: Load $gp as required. Merge 32-bit and
+ 64-bit versions.
+
+ * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (SYSCALL_ERROR_LABEL):
+ Delete definition.
+ * sysdeps/unix/sysv/linux/mips/nptl/sysdep-cancel.h (PSEUDO_CPLOAD,
+ PSEUDO_ERRJMP, PSEUDO_SAVEGP, PSEUDO_LOADGP): Define.
+ (PSEUDO): Use them. Move outside __PIC__.
+ (PSEUDO_JMP): New.
+ (CENABLE, CDISABLE): Use it.
+
2008-08-19 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/mips/sys/epoll.h: Change epoll_create2
--- /dev/null
+struct link_map_machine
+ {
+ ElfW(Addr) plt; /* Address of .plt */
+ };
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+/* Until elf/elf.h in glibc is updated. */
+#ifndef STO_MIPS_PLT
+# undef DT_MIPS_NUM
+# define DT_MIPS_NUM 0x35
+#endif
+
/* Number of extra dynamic section entries for this architecture. By
default there are none. */
#define DT_THISPROCNUM DT_MIPS_NUM
--- /dev/null
+/* Look up a symbol in the loaded objects.
+ MIPS/Linux version - this is identical to the common version, but
+ because it is in sysdeps/mips, it gets sysdeps/mips/do-lookup.h.
+ Using <do-lookup.h> instead of "do-lookup.h" would work too.
+
+ Copyright (C) 1995-2005, 2006, 2007 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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. */
+
+#include <alloca.h>
+#include <libintl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ldsodefs.h>
+#include <dl-hash.h>
+#include <dl-machine.h>
+#include <sysdep-cancel.h>
+#include <bits/libc-lock.h>
+#include <tls.h>
+
+#include <assert.h>
+
+#define VERSTAG(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (tag))
+
+/* We need this string more than once. */
+static const char undefined_msg[] = "undefined symbol: ";
+
+
+struct sym_val
+ {
+ const ElfW(Sym) *s;
+ struct link_map *m;
+ };
+
+
+#define make_string(string, rest...) \
+ ({ \
+ const char *all[] = { string, ## rest }; \
+ size_t len, cnt; \
+ char *result, *cp; \
+ \
+ len = 1; \
+ for (cnt = 0; cnt < sizeof (all) / sizeof (all[0]); ++cnt) \
+ len += strlen (all[cnt]); \
+ \
+ cp = result = alloca (len); \
+ for (cnt = 0; cnt < sizeof (all) / sizeof (all[0]); ++cnt) \
+ cp = __stpcpy (cp, all[cnt]); \
+ \
+ result; \
+ })
+
+/* Statistics function. */
+#ifdef SHARED
+# define bump_num_relocations() ++GL(dl_num_relocations)
+#else
+# define bump_num_relocations() ((void) 0)
+#endif
+
+
+/* The actual lookup code. */
+#include "do-lookup.h"
+
+
+static uint_fast32_t
+dl_new_hash (const char *s)
+{
+ uint_fast32_t h = 5381;
+ for (unsigned char c = *s; c != '\0'; c = *++s)
+ h = h * 33 + c;
+ return h & 0xffffffff;
+}
+
+
+/* Add extra dependency on MAP to UNDEF_MAP. */
+static int
+internal_function
+add_dependency (struct link_map *undef_map, struct link_map *map, int flags)
+{
+ struct link_map *runp;
+ unsigned int i;
+ int result = 0;
+
+ /* Avoid self-references and references to objects which cannot be
+ unloaded anyway. */
+ if (undef_map == map)
+ return 0;
+
+ /* Avoid references to objects which cannot be unloaded anyway. */
+ assert (map->l_type == lt_loaded);
+ if ((map->l_flags_1 & DF_1_NODELETE) != 0)
+ return 0;
+
+ struct link_map_reldeps *l_reldeps
+ = atomic_forced_read (undef_map->l_reldeps);
+
+ /* Make sure l_reldeps is read before l_initfini. */
+ atomic_read_barrier ();
+
+ /* Determine whether UNDEF_MAP already has a reference to MAP. First
+ look in the normal dependencies. */
+ struct link_map **l_initfini = atomic_forced_read (undef_map->l_initfini);
+ if (l_initfini != NULL)
+ {
+ for (i = 0; l_initfini[i] != NULL; ++i)
+ if (l_initfini[i] == map)
+ return 0;
+ }
+
+ /* No normal dependency. See whether we already had to add it
+ to the special list of dynamic dependencies. */
+ unsigned int l_reldepsact = 0;
+ if (l_reldeps != NULL)
+ {
+ struct link_map **list = &l_reldeps->list[0];
+ l_reldepsact = l_reldeps->act;
+ for (i = 0; i < l_reldepsact; ++i)
+ if (list[i] == map)
+ return 0;
+ }
+
+ /* Save serial number of the target MAP. */
+ unsigned long long serial = map->l_serial;
+
+ /* Make sure nobody can unload the object while we are at it. */
+ if (__builtin_expect (flags & DL_LOOKUP_GSCOPE_LOCK, 0))
+ {
+ /* We can't just call __rtld_lock_lock_recursive (GL(dl_load_lock))
+ here, that can result in ABBA deadlock. */
+ THREAD_GSCOPE_RESET_FLAG ();
+ __rtld_lock_lock_recursive (GL(dl_load_lock));
+ /* While MAP value won't change, after THREAD_GSCOPE_RESET_FLAG ()
+ it can e.g. point to unallocated memory. So avoid the optimizer
+ treating the above read from MAP->l_serial as ensurance it
+ can safely dereference it. */
+ map = atomic_forced_read (map);
+
+ /* From this point on it is unsafe to dereference MAP, until it
+ has been found in one of the lists. */
+
+ /* Redo the l_initfini check in case undef_map's l_initfini
+ changed in the mean time. */
+ if (undef_map->l_initfini != l_initfini
+ && undef_map->l_initfini != NULL)
+ {
+ l_initfini = undef_map->l_initfini;
+ for (i = 0; l_initfini[i] != NULL; ++i)
+ if (l_initfini[i] == map)
+ goto out_check;
+ }
+
+ /* Redo the l_reldeps check if undef_map's l_reldeps changed in
+ the mean time. */
+ if (undef_map->l_reldeps != NULL)
+ {
+ if (undef_map->l_reldeps != l_reldeps)
+ {
+ struct link_map **list = &undef_map->l_reldeps->list[0];
+ l_reldepsact = undef_map->l_reldeps->act;
+ for (i = 0; i < l_reldepsact; ++i)
+ if (list[i] == map)
+ goto out_check;
+ }
+ else if (undef_map->l_reldeps->act > l_reldepsact)
+ {
+ struct link_map **list
+ = &undef_map->l_reldeps->list[0];
+ i = l_reldepsact;
+ l_reldepsact = undef_map->l_reldeps->act;
+ for (; i < l_reldepsact; ++i)
+ if (list[i] == map)
+ goto out_check;
+ }
+ }
+ }
+ else
+ __rtld_lock_lock_recursive (GL(dl_load_lock));
+
+ /* The object is not yet in the dependency list. Before we add
+ it make sure just one more time the object we are about to
+ reference is still available. There is a brief period in
+ which the object could have been removed since we found the
+ definition. */
+ runp = GL(dl_ns)[undef_map->l_ns]._ns_loaded;
+ while (runp != NULL && runp != map)
+ runp = runp->l_next;
+
+ if (runp != NULL)
+ {
+ /* The object is still available. */
+
+ /* MAP could have been dlclosed, freed and then some other dlopened
+ library could have the same link_map pointer. */
+ if (map->l_serial != serial)
+ goto out_check;
+
+ /* Redo the NODELETE check, as when dl_load_lock wasn't held
+ yet this could have changed. */
+ if ((map->l_flags_1 & DF_1_NODELETE) != 0)
+ goto out;
+
+ /* If the object with the undefined reference cannot be removed ever
+ just make sure the same is true for the object which contains the
+ definition. */
+ if (undef_map->l_type != lt_loaded
+ || (undef_map->l_flags_1 & DF_1_NODELETE) != 0)
+ {
+ map->l_flags_1 |= DF_1_NODELETE;
+ goto out;
+ }
+
+ /* Add the reference now. */
+ if (__builtin_expect (l_reldepsact >= undef_map->l_reldepsmax, 0))
+ {
+ /* Allocate more memory for the dependency list. Since this
+ can never happen during the startup phase we can use
+ `realloc'. */
+ struct link_map_reldeps *newp;
+ unsigned int max
+ = undef_map->l_reldepsmax ? undef_map->l_reldepsmax * 2 : 10;
+
+ newp = malloc (sizeof (*newp) + max * sizeof (struct link_map *));
+ if (newp == NULL)
+ {
+ /* If we didn't manage to allocate memory for the list this is
+ no fatal problem. We simply make sure the referenced object
+ cannot be unloaded. This is semantically the correct
+ behavior. */
+ map->l_flags_1 |= DF_1_NODELETE;
+ goto out;
+ }
+ else
+ {
+ if (l_reldepsact)
+ memcpy (&newp->list[0], &undef_map->l_reldeps->list[0],
+ l_reldepsact * sizeof (struct link_map *));
+ newp->list[l_reldepsact] = map;
+ newp->act = l_reldepsact + 1;
+ atomic_write_barrier ();
+ void *old = undef_map->l_reldeps;
+ undef_map->l_reldeps = newp;
+ undef_map->l_reldepsmax = max;
+ if (old)
+ _dl_scope_free (old);
+ }
+ }
+ else
+ {
+ undef_map->l_reldeps->list[l_reldepsact] = map;
+ atomic_write_barrier ();
+ undef_map->l_reldeps->act = l_reldepsact + 1;
+ }
+
+ /* Display information if we are debugging. */
+ if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
+ _dl_debug_printf ("\
+\nfile=%s [%lu]; needed by %s [%lu] (relocation dependency)\n\n",
+ map->l_name[0] ? map->l_name : rtld_progname,
+ map->l_ns,
+ undef_map->l_name[0]
+ ? undef_map->l_name : rtld_progname,
+ undef_map->l_ns);
+ }
+ else
+ /* Whoa, that was bad luck. We have to search again. */
+ result = -1;
+
+ out:
+ /* Release the lock. */
+ __rtld_lock_unlock_recursive (GL(dl_load_lock));
+
+ if (__builtin_expect (flags & DL_LOOKUP_GSCOPE_LOCK, 0))
+ THREAD_GSCOPE_SET_FLAG ();
+
+ return result;
+
+ out_check:
+ if (map->l_serial != serial)
+ result = -1;
+ goto out;
+}
+
+static void
+internal_function
+_dl_debug_bindings (const char *undef_name, struct link_map *undef_map,
+ const ElfW(Sym) **ref, struct sym_val *value,
+ const struct r_found_version *version, int type_class,
+ int protected);
+
+
+/* Search loaded objects' symbol tables for a definition of the symbol
+ UNDEF_NAME, perhaps with a requested version for the symbol.
+
+ We must never have calls to the audit functions inside this function
+ or in any function which gets called. If this would happen the audit
+ code might create a thread which can throw off all the scope locking. */
+lookup_t
+internal_function
+_dl_lookup_symbol_x (const char *undef_name, struct link_map *undef_map,
+ const ElfW(Sym) **ref,
+ struct r_scope_elem *symbol_scope[],
+ const struct r_found_version *version,
+ int type_class, int flags, struct link_map *skip_map)
+{
+ const uint_fast32_t new_hash = dl_new_hash (undef_name);
+ unsigned long int old_hash = 0xffffffff;
+ struct sym_val current_value = { NULL, NULL };
+ struct r_scope_elem **scope = symbol_scope;
+
+ bump_num_relocations ();
+
+ /* No other flag than DL_LOOKUP_ADD_DEPENDENCY or DL_LOOKUP_GSCOPE_LOCK
+ is allowed if we look up a versioned symbol. */
+ assert (version == NULL
+ || (flags & ~(DL_LOOKUP_ADD_DEPENDENCY | DL_LOOKUP_GSCOPE_LOCK))
+ == 0);
+
+ size_t i = 0;
+ if (__builtin_expect (skip_map != NULL, 0))
+ /* Search the relevant loaded objects for a definition. */
+ while ((*scope)->r_list[i] != skip_map)
+ ++i;
+
+ /* Search the relevant loaded objects for a definition. */
+ for (size_t start = i; *scope != NULL; start = 0, ++scope)
+ {
+ int res = do_lookup_x (undef_name, new_hash, &old_hash, *ref,
+ ¤t_value, *scope, start, version, flags,
+ skip_map, type_class);
+ if (res > 0)
+ break;
+
+ if (__builtin_expect (res, 0) < 0 && skip_map == NULL)
+ {
+ /* Oh, oh. The file named in the relocation entry does not
+ contain the needed symbol. This code is never reached
+ for unversioned lookups. */
+ assert (version != NULL);
+ const char *reference_name = undef_map ? undef_map->l_name : NULL;
+
+ /* XXX We cannot translate the message. */
+ _dl_signal_cerror (0, (reference_name[0]
+ ? reference_name
+ : (rtld_progname ?: "<main program>")),
+ N_("relocation error"),
+ make_string ("symbol ", undef_name, ", version ",
+ version->name,
+ " not defined in file ",
+ version->filename,
+ " with link time reference",
+ res == -2
+ ? " (no version symbols)" : ""));
+ *ref = NULL;
+ return 0;
+ }
+ }
+
+ if (__builtin_expect (current_value.s == NULL, 0))
+ {
+ if ((*ref == NULL || ELFW(ST_BIND) ((*ref)->st_info) != STB_WEAK)
+ && skip_map == NULL)
+ {
+ /* We could find no value for a strong reference. */
+ const char *reference_name = undef_map ? undef_map->l_name : "";
+ const char *versionstr = version ? ", version " : "";
+ const char *versionname = (version && version->name
+ ? version->name : "");
+
+ /* XXX We cannot translate the message. */
+ _dl_signal_cerror (0, (reference_name[0]
+ ? reference_name
+ : (rtld_progname ?: "<main program>")),
+ N_("symbol lookup error"),
+ make_string (undefined_msg, undef_name,
+ versionstr, versionname));
+ }
+ *ref = NULL;
+ return 0;
+ }
+
+ int protected = (*ref
+ && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED);
+ if (__builtin_expect (protected != 0, 0))
+ {
+ /* It is very tricky. We need to figure out what value to
+ return for the protected symbol. */
+ if (type_class == ELF_RTYPE_CLASS_PLT)
+ {
+ if (current_value.s != NULL && current_value.m != undef_map)
+ {
+ current_value.s = *ref;
+ current_value.m = undef_map;
+ }
+ }
+ else
+ {
+ struct sym_val protected_value = { NULL, NULL };
+
+ for (scope = symbol_scope; *scope != NULL; i = 0, ++scope)
+ if (do_lookup_x (undef_name, new_hash, &old_hash, *ref,
+ &protected_value, *scope, i, version, flags,
+ skip_map, ELF_RTYPE_CLASS_PLT) != 0)
+ break;
+
+ if (protected_value.s != NULL && protected_value.m != undef_map)
+ {
+ current_value.s = *ref;
+ current_value.m = undef_map;
+ }
+ }
+ }
+
+ /* We have to check whether this would bind UNDEF_MAP to an object
+ in the global scope which was dynamically loaded. In this case
+ we have to prevent the latter from being unloaded unless the
+ UNDEF_MAP object is also unloaded. */
+ if (__builtin_expect (current_value.m->l_type == lt_loaded, 0)
+ /* Don't do this for explicit lookups as opposed to implicit
+ runtime lookups. */
+ && (flags & DL_LOOKUP_ADD_DEPENDENCY) != 0
+ /* Add UNDEF_MAP to the dependencies. */
+ && add_dependency (undef_map, current_value.m, flags) < 0)
+ /* Something went wrong. Perhaps the object we tried to reference
+ was just removed. Try finding another definition. */
+ return _dl_lookup_symbol_x (undef_name, undef_map, ref,
+ (flags & DL_LOOKUP_GSCOPE_LOCK)
+ ? undef_map->l_scope : symbol_scope,
+ version, type_class, flags, skip_map);
+
+ /* The object is used. */
+ current_value.m->l_used = 1;
+
+ if (__builtin_expect (GLRO(dl_debug_mask)
+ & (DL_DEBUG_BINDINGS|DL_DEBUG_PRELINK), 0))
+ _dl_debug_bindings (undef_name, undef_map, ref,
+ ¤t_value, version, type_class, protected);
+
+ *ref = current_value.s;
+ return LOOKUP_VALUE (current_value.m);
+}
+
+
+/* Cache the location of MAP's hash table. */
+
+void
+internal_function
+_dl_setup_hash (struct link_map *map)
+{
+ Elf_Symndx *hash;
+ Elf_Symndx nchain;
+
+ if (__builtin_expect (map->l_info[DT_ADDRTAGIDX (DT_GNU_HASH) + DT_NUM
+ + DT_THISPROCNUM + DT_VERSIONTAGNUM
+ + DT_EXTRANUM + DT_VALNUM] != NULL, 1))
+ {
+ Elf32_Word *hash32
+ = (void *) D_PTR (map, l_info[DT_ADDRTAGIDX (DT_GNU_HASH) + DT_NUM
+ + DT_THISPROCNUM + DT_VERSIONTAGNUM
+ + DT_EXTRANUM + DT_VALNUM]);
+ map->l_nbuckets = *hash32++;
+ Elf32_Word symbias = *hash32++;
+ Elf32_Word bitmask_nwords = *hash32++;
+ /* Must be a power of two. */
+ assert ((bitmask_nwords & (bitmask_nwords - 1)) == 0);
+ map->l_gnu_bitmask_idxbits = bitmask_nwords - 1;
+ map->l_gnu_shift = *hash32++;
+
+ map->l_gnu_bitmask = (ElfW(Addr) *) hash32;
+ hash32 += __ELF_NATIVE_CLASS / 32 * bitmask_nwords;
+
+ map->l_gnu_buckets = hash32;
+ hash32 += map->l_nbuckets;
+ map->l_gnu_chain_zero = hash32 - symbias;
+ return;
+ }
+
+ if (!map->l_info[DT_HASH])
+ return;
+ hash = (void *) D_PTR (map, l_info[DT_HASH]);
+
+ map->l_nbuckets = *hash++;
+ nchain = *hash++;
+ map->l_buckets = hash;
+ hash += map->l_nbuckets;
+ map->l_chain = hash;
+}
+
+
+static void
+internal_function
+_dl_debug_bindings (const char *undef_name, struct link_map *undef_map,
+ const ElfW(Sym) **ref, struct sym_val *value,
+ const struct r_found_version *version, int type_class,
+ int protected)
+{
+ const char *reference_name = undef_map->l_name;
+
+ if (GLRO(dl_debug_mask) & DL_DEBUG_BINDINGS)
+ {
+ _dl_debug_printf ("binding file %s [%lu] to %s [%lu]: %s symbol `%s'",
+ (reference_name[0]
+ ? reference_name
+ : (rtld_progname ?: "<main program>")),
+ undef_map->l_ns,
+ value->m->l_name[0] ? value->m->l_name : rtld_progname,
+ value->m->l_ns,
+ protected ? "protected" : "normal", undef_name);
+ if (version)
+ _dl_debug_printf_c (" [%s]\n", version->name);
+ else
+ _dl_debug_printf_c ("\n");
+ }
+#ifdef SHARED
+ if (GLRO(dl_debug_mask) & DL_DEBUG_PRELINK)
+ {
+ int conflict = 0;
+ struct sym_val val = { NULL, NULL };
+
+ if ((GLRO(dl_trace_prelink_map) == NULL
+ || GLRO(dl_trace_prelink_map) == GL(dl_ns)[LM_ID_BASE]._ns_loaded)
+ && undef_map != GL(dl_ns)[LM_ID_BASE]._ns_loaded)
+ {
+ const uint_fast32_t new_hash = dl_new_hash (undef_name);
+ unsigned long int old_hash = 0xffffffff;
+
+ do_lookup_x (undef_name, new_hash, &old_hash, *ref, &val,
+ undef_map->l_local_scope[0], 0, version, 0, NULL,
+ type_class);
+
+ if (val.s != value->s || val.m != value->m)
+ conflict = 1;
+ }
+
+ if (value->s
+ && (__builtin_expect (ELFW(ST_TYPE) (value->s->st_info)
+ == STT_TLS, 0)))
+ type_class = 4;
+
+ if (conflict
+ || GLRO(dl_trace_prelink_map) == undef_map
+ || GLRO(dl_trace_prelink_map) == NULL
+ || type_class == 4)
+ {
+ _dl_printf ("%s 0x%0*Zx 0x%0*Zx -> 0x%0*Zx 0x%0*Zx ",
+ conflict ? "conflict" : "lookup",
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) undef_map->l_map_start,
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) (((ElfW(Addr)) *ref) - undef_map->l_map_start),
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) (value->s ? value->m->l_map_start : 0),
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) (value->s ? value->s->st_value : 0));
+
+ if (conflict)
+ _dl_printf ("x 0x%0*Zx 0x%0*Zx ",
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) (val.s ? val.m->l_map_start : 0),
+ (int) sizeof (ElfW(Addr)) * 2,
+ (size_t) (val.s ? val.s->st_value : 0));
+
+ _dl_printf ("/%x %s\n", type_class, undef_name);
+ }
+ }
+#endif
+}
#define ELF_MACHINE_NAME "MIPS"
-#define ELF_MACHINE_NO_PLT
-
#include <entry.h>
#ifndef ENTRY_POINT
".size\t" __STRING(entry) ", . - " __STRING(entry) "\n\t"
#endif
+/* Until elf/elf.h in glibc is updated. */
+#ifndef STO_MIPS_PLT
+#define STO_MIPS_PLT 0x8
+#define R_MIPS_COPY 126
+#define R_MIPS_JUMP_SLOT 127
+#define DT_MIPS_PLTGOT 0x70000032
+#endif
+
/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.
- This makes no sense on MIPS but we have to define this to R_MIPS_REL32
- to avoid the asserts in dl-lookup.c from blowing. */
-#define ELF_MACHINE_JMP_SLOT R_MIPS_REL32
-#define elf_machine_type_class(type) ELF_RTYPE_CLASS_PLT
+ This only makes sense on MIPS when using PLTs, so choose the
+ PLT relocation (not encountered when not using PLTs). */
+#define ELF_MACHINE_JMP_SLOT R_MIPS_JUMP_SLOT
+#define elf_machine_type_class(type) \
+ ((((type) == ELF_MACHINE_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
+ | (((type) == R_MIPS_COPY) * ELF_RTYPE_CLASS_COPY))
+
+#define ELF_MACHINE_PLT_REL 1
/* Translate a processor specific dynamic tag to the index
in l_info array. */
(ElfW(Addr)) (r); \
} while (0)
+/* Allow ABIVERSION == 1, meaning PLTs and copy relocations are
+ required. */
+#define VALID_ELF_ABIVERSION(ver) (ver == 0 || ver == 2)
+#define VALID_ELF_OSABI(osabi) (osabi == ELFOSABI_SYSV)
+#define VALID_ELF_HEADER(hdr,exp,size) \
+ memcmp (hdr,exp,size-2) == 0 \
+ && VALID_ELF_OSABI (hdr[EI_OSABI]) \
+ && VALID_ELF_ABIVERSION (hdr[EI_ABIVERSION])
+
/* Return nonzero iff ELF header is compatible with the running host. */
static inline int __attribute_used__
elf_machine_matches_host (const ElfW(Ehdr) *ehdr)
# define ARCH_LA_PLTEXIT mips_n64_gnu_pltexit
# endif
+/* For a non-writable PLT, rewrite the .got.plt entry at RELOC_ADDR to
+ point at the symbol with address VALUE. For a writable PLT, rewrite
+ the corresponding PLT entry instead. */
+static inline ElfW(Addr)
+elf_machine_fixup_plt (struct link_map *map, lookup_t t,
+ const ElfW(Rel) *reloc,
+ ElfW(Addr) *reloc_addr, ElfW(Addr) value)
+{
+ return *reloc_addr = value;
+}
+
+static inline ElfW(Addr)
+elf_machine_plt_value (struct link_map *map, const ElfW(Rel) *reloc,
+ ElfW(Addr) value)
+{
+ return value;
+}
+
#endif /* !dl_machine_h */
#ifdef RESOLVE_MAP
#endif
case R_MIPS_NONE: /* Alright, Wilbur. */
break;
+
+ case R_MIPS_JUMP_SLOT:
+ {
+ struct link_map *sym_map;
+ ElfW(Addr) value;
+
+ /* The addend for a jump slot relocation must always be zero:
+ calls via the PLT always branch to the symbol's address and
+ not to the address plus a non-zero offset. */
+ if (r_addend != 0)
+ _dl_signal_error (0, map->l_name, NULL,
+ "found jump slot relocation with non-zero addend");
+
+ sym_map = RESOLVE_MAP (&sym, version, r_type);
+ value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
+ *addr_field = value;
+
+ break;
+ }
+
+ case R_MIPS_COPY:
+ {
+ const ElfW(Sym) *const refsym = sym;
+ struct link_map *sym_map;
+ ElfW(Addr) value;
+
+ /* Calculate the address of the symbol. */
+ sym_map = RESOLVE_MAP (&sym, version, r_type);
+ value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
+
+ if (__builtin_expect (sym == NULL, 0))
+ /* This can happen in trace mode if an object could not be
+ found. */
+ break;
+ if (__builtin_expect (sym->st_size > refsym->st_size, 0)
+ || (__builtin_expect (sym->st_size < refsym->st_size, 0)
+ && GLRO(dl_verbose)))
+ {
+ const char *strtab;
+
+ strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
+ _dl_error_printf ("\
+ %s: Symbol `%s' has different size in shared object, consider re-linking\n",
+ rtld_progname ?: "<program name unknown>",
+ strtab + refsym->st_name);
+ }
+ memcpy (reloc_addr, (void *) value,
+ MIN (sym->st_size, refsym->st_size));
+ break;
+ }
+
#if _MIPS_SIM == _ABI64
case R_MIPS_64:
/* For full compliance with the ELF64 ABI, one must precede the
auto inline void
__attribute__((always_inline))
elf_machine_lazy_rel (struct link_map *map,
- ElfW(Addr) l_addr, const ElfW(Rela) *reloc)
+ ElfW(Addr) l_addr, const ElfW(Rel) *reloc)
{
- /* Do nothing. */
+ ElfW(Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
+ const unsigned int r_type = ELFW(R_TYPE) (reloc->r_info);
+ /* Check for unexpected PLT reloc type. */
+ if (__builtin_expect (r_type == R_MIPS_JUMP_SLOT, 1))
+ {
+ if (__builtin_expect (map->l_mach.plt, 0) == 0)
+ {
+ /* Nothing is required here since we only support lazy
+ relocation in executables. */
+ }
+ else
+ *reloc_addr = map->l_mach.plt;
+ }
+ else
+ _dl_reloc_bad_type (map, r_type, 1);
}
auto inline void
const ElfW(Half) *vernum;
int i, n, symidx;
-#define RESOLVE_GOTSYM(sym,vernum,sym_index) \
+#define RESOLVE_GOTSYM(sym,vernum,sym_index,reloc) \
({ \
const ElfW(Sym) *ref = sym; \
const struct r_found_version *version \
= vernum ? &map->l_versions[vernum[sym_index] & 0x7fff] : NULL; \
struct link_map *sym_map; \
- sym_map = RESOLVE_MAP (&ref, version, R_MIPS_REL32); \
+ sym_map = RESOLVE_MAP (&ref, version, reloc); \
ref ? sym_map->l_addr + ref->st_value : 0; \
})
{
if (sym->st_shndx == SHN_UNDEF)
{
- if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
- && sym->st_value && lazy)
- *got = sym->st_value + map->l_addr;
+ if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC && sym->st_value
+ && !(sym->st_other & STO_MIPS_PLT))
+ {
+ if (lazy)
+ *got = sym->st_value + map->l_addr;
+ else
+ /* This is a lazy-binding stub, so we don't need the
+ canonical address. */
+ *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_JUMP_SLOT);
+ }
else
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
+ *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
}
else if (sym->st_shndx == SHN_COMMON)
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
+ *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
- && *got != sym->st_value
- && lazy)
- *got += map->l_addr;
+ && *got != sym->st_value)
+ {
+ if (lazy)
+ *got += map->l_addr;
+ else
+ /* This is a lazy-binding stub, so we don't need the
+ canonical address. */
+ *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_JUMP_SLOT);
+ }
else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION)
{
if (sym->st_other == 0)
*got += map->l_addr;
}
else
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
+ *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
++got;
++sym;
# ifndef RTLD_BOOTSTRAP
ElfW(Addr) *got;
extern void _dl_runtime_resolve (ElfW(Word));
+ extern void _dl_runtime_pltresolve (void);
extern int _dl_mips_gnu_objects;
if (lazy)
/* Relocate global offset table. */
elf_machine_got_rel (l, lazy);
+ /* If using PLTs, fill in the first two entries of .got.plt. */
+ if (l->l_info[DT_JMPREL] && lazy)
+ {
+ ElfW(Addr) *gotplt;
+ gotplt = (ElfW(Addr) *) D_PTR (l, l_info[DT_MIPS (PLTGOT)]);
+ /* If a library is prelinked but we have to relocate anyway,
+ we have to be able to undo the prelinking of .got.plt.
+ The prelinker saved the address of .plt for us here. */
+ if (gotplt[1])
+ l->l_mach.plt = gotplt[1] + l->l_addr;
+ gotplt[0] = (ElfW(Addr)) &_dl_runtime_pltresolve;
+ gotplt[1] = (ElfW(Addr)) l;
+ }
+
# endif
return lazy;
}
lw $7, 28($29)\n \
"
+/* The PLT resolver should also save and restore $2 and $3, which are used
+ as arguments to MIPS16 stub functions. */
+#define ELF_DL_PLT_FRAME_SIZE 48
+
+#define ELF_DL_PLT_SAVE_ARG_REGS \
+ ELF_DL_SAVE_ARG_REGS "\
+ sw $2, 40($29)\n \
+ sw $3, 44($29)\n \
+"
+
+#define ELF_DL_PLT_RESTORE_ARG_REGS \
+ ELF_DL_RESTORE_ARG_REGS "\
+ lw $2, 40($29)\n \
+ lw $3, 44($29)\n \
+"
+
#define IFABIO32(X) X
+#define IFNEWABI(X)
#else /* _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 */
ld $11, 64($29)\n \
"
+/* The PLT resolver should also save and restore $2 and $3, which are used
+ as arguments to MIPS16 stub functions. */
+#define ELF_DL_PLT_FRAME_SIZE 96
+
+#define ELF_DL_PLT_SAVE_ARG_REGS \
+ ELF_DL_SAVE_ARG_REGS "\
+ sd $2, 80($29)\n \
+ sd $3, 88($29)\n \
+"
+
+#define ELF_DL_PLT_RESTORE_ARG_REGS \
+ ELF_DL_RESTORE_ARG_REGS "\
+ ld $2, 80($29)\n \
+ ld $3, 88($29)\n \
+"
+
#define IFABIO32(X)
+#define IFNEWABI(X) X
#endif
.end _dl_runtime_resolve\n\
.previous\n\
");
+
+/* Assembler veneer called from the PLT header code when using PLTs.
+
+ Code in each PLT entry and the PLT header fills in the arguments to
+ this function:
+
+ - $15 (o32 t7, n32/n64 t3) - caller's return address
+ - $24 (t8) - PLT entry index
+ - $25 (t9) - address of _dl_runtime_pltresolve
+ - o32 $28 (gp), n32/n64 $14 (t2) - address of .got.plt
+
+ Different registers are used for .got.plt because the ABI was
+ originally designed for o32, where gp was available (call
+ clobbered). On n32/n64 gp is call saved.
+
+ _dl_fixup needs:
+
+ - $4 (a0) - link map address
+ - $5 (a1) - .rel.plt offset (== PLT entry index * 8) */
+
+asm ("\n\
+ .text\n\
+ .align 2\n\
+ .globl _dl_runtime_pltresolve\n\
+ .type _dl_runtime_pltresolve,@function\n\
+ .ent _dl_runtime_pltresolve\n\
+_dl_runtime_pltresolve:\n\
+ .frame $29, " STRINGXP(ELF_DL_PLT_FRAME_SIZE) ", $31\n\
+ .set noreorder\n\
+ # Save arguments and sp value in stack.\n\
+ " STRINGXP(PTR_SUBIU) " $29, " STRINGXP(ELF_DL_PLT_FRAME_SIZE) "\n\
+ " IFABIO32(STRINGXP(PTR_L) " $13, " STRINGXP(PTRSIZE) "($28)") "\n\
+ " IFNEWABI(STRINGXP(PTR_L) " $13, " STRINGXP(PTRSIZE) "($14)") "\n\
+ # Modify t9 ($25) so as to point .cpload instruction.\n\
+ " IFABIO32(STRINGXP(PTR_ADDIU) " $25, 12\n") "\
+ # Compute GP.\n\
+ " STRINGXP(SETUP_GP) "\n\
+ " STRINGXV(SETUP_GP64 (0, _dl_runtime_pltresolve)) "\n\
+ .set reorder\n\
+ " IFABIO32(STRINGXP(CPRESTORE(32))) "\n\
+ " ELF_DL_PLT_SAVE_ARG_REGS "\
+ move $4, $13\n\
+ sll $5, $24, " STRINGXP(PTRLOG) " + 1\n\
+ jal _dl_fixup\n\
+ move $25, $2\n\
+ " ELF_DL_PLT_RESTORE_ARG_REGS "\
+ " STRINGXP(RESTORE_GP64) "\n\
+ " STRINGXP(PTR_ADDIU) " $29, " STRINGXP(ELF_DL_PLT_FRAME_SIZE) "\n\
+ jr $25\n\
+ .end _dl_runtime_pltresolve\n\
+ .previous\n\
+");
+
--- /dev/null
+/* MIPS-specific veneer to GLIBC's do-lookup.h.
+ Copyright (C) 2008 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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. */
+
+/* The semantics of zero/non-zero values of undefined symbols differs
+ depending on whether the non-PIC ABI is in use. Under the non-PIC ABI,
+ a non-zero value indicates that there is an address reference to the
+ symbol and thus it must always be resolved (except when resolving a jump
+ slot relocation) to the PLT entry whose address is provided as the
+ symbol's value; a zero value indicates that this canonical-address
+ behaviour is not required. Yet under the classic MIPS psABI, a zero value
+ indicates that there is an address reference to the function and the
+ dynamic linker must resolve the symbol immediately upon loading. To
+ avoid conflict, symbols for which the dynamic linker must assume the
+ non-PIC ABI semantics are marked with the STO_MIPS_PLT flag. The
+ following ugly hack causes the code in the platform-independent
+ do-lookup.h file to check this flag correctly. */
+#define st_value st_shndx == SHN_UNDEF && !(sym->st_other & STO_MIPS_PLT)) \
+ || (sym->st_value
+#include_next "do-lookup.h"
+#undef st_value
+
/* Macros to support TLS testing in times of missing compiler support. */
-#if _MIPS_SIM != _ABI64
+#include <sys/cdefs.h>
+#include <sys/asm.h>
-/* These versions are for o32 and n32. */
+#define __STRING2(X) __STRING(X)
+#define ADDU __STRING2(PTR_ADDU)
+#define ADDIU __STRING2(PTR_ADDIU)
+#define LW __STRING2(PTR_L)
-# define TLS_GD(x) \
- ({ void *__result; \
- extern void *__tls_get_addr (void *); \
- asm ("addiu %0, $28, %%tlsgd(" #x ")" \
- : "=r" (__result)); \
- (int *)__tls_get_addr (__result); })
+/* Load the GOT pointer, which may not be in $28 in a non-PIC
+ (abicalls pic0) function. */
+#ifndef __PIC__
+# if _MIPS_SIM != _ABI64
+# define LOAD_GP "move %[tmp], $28\n\tla $28, __gnu_local_gp\n\t"
+# else
+# define LOAD_GP "move %[tmp], $28\n\tdla $28, __gnu_local_gp\n\t"
+# endif
+# define UNLOAD_GP "\n\tmove $28, %[tmp]"
#else
+# define LOAD_GP
+# define UNLOAD_GP
+#endif
+
# define TLS_GD(x) \
- ({ void *__result; \
+ ({ void *__result, *__tmp; \
extern void *__tls_get_addr (void *); \
- asm ("daddiu %0, $28, %%tlsgd(" #x ")" \
- : "=r" (__result)); \
+ asm (LOAD_GP ADDIU " %0, $28, %%tlsgd(" #x ")" \
+ UNLOAD_GP \
+ : "=r" (__result), [tmp] "=&r" (__tmp)); \
(int *)__tls_get_addr (__result); })
-#endif
-
-#if _MIPS_SIM != _ABI64
# define TLS_LD(x) \
- ({ void *__result; \
+ ({ void *__result, *__tmp; \
extern void *__tls_get_addr (void *); \
- asm ("addiu %0, $28, %%tlsldm(" #x ")" \
- : "=r" (__result)); \
+ asm (LOAD_GP ADDIU " %0, $28, %%tlsldm(" #x ")" \
+ UNLOAD_GP \
+ : "=r" (__result), [tmp] "=&r" (__tmp)); \
__result = __tls_get_addr (__result); \
asm ("lui $3,%%dtprel_hi(" #x ")\n\t" \
"addiu $3,$3,%%dtprel_lo(" #x ")\n\t" \
- "addu %0,%0,$3" \
+ ADDU " %0,%0,$3" \
: "+r" (__result) : : "$3"); \
__result; })
# define TLS_IE(x) \
- ({ void *__result; \
+ ({ void *__result, *__tmp; \
asm (".set push\n\t.set mips32r2\n\t" \
"rdhwr\t%0,$29\n\t.set pop" \
: "=v" (__result)); \
- asm ("lw $3,%%gottprel(" #x ")($28)\n\t" \
- "addu %0,%0,$3" \
- : "+r" (__result) : : "$3"); \
+ asm (LOAD_GP LW " $3,%%gottprel(" #x ")($28)\n\t" \
+ ADDU " %0,%0,$3" \
+ UNLOAD_GP \
+ : "+r" (__result), [tmp] "=&r" (__tmp) \
+ : : "$3"); \
__result; })
# define TLS_LE(x) \
({ void *__result; \
: "=v" (__result)); \
asm ("lui $3,%%tprel_hi(" #x ")\n\t" \
"addiu $3,$3,%%tprel_lo(" #x ")\n\t" \
- "addu %0,%0,$3" \
+ ADDU " %0,%0,$3" \
: "+r" (__result) : : "$3"); \
__result; })
-
-#else
-
-/* These versions are for n64. */
-
-# define TLS_LD(x) \
- ({ void *__result; \
- extern void *__tls_get_addr (void *); \
- asm ("daddiu %0, $28, %%tlsldm(" #x ")" \
- : "=r" (__result)); \
- __result = __tls_get_addr (__result); \
- asm ("lui $3,%%dtprel_hi(" #x ")\n\t" \
- "daddiu $3,$3,%%dtprel_lo(" #x ")\n\t" \
- "daddu %0,%0,$3" \
- : "+r" (__result) : : "$3"); \
- __result; })
-# define TLS_IE(x) \
- ({ void *__result; \
- asm (".set push\n\t.set mips32r2\n\t" \
- "rdhwr\t%0,$29\n\t.set pop" \
- : "=v" (__result)); \
- asm ("ld $3,%%gottprel(" #x ")($28)\n\t" \
- "daddu %0,%0,$3" \
- : "+r" (__result) : : "$3"); \
- __result; })
-# define TLS_LE(x) \
- ({ void *__result; \
- asm (".set push\n\t.set mips32r2\n\t" \
- "rdhwr\t%0,$29\n\t.set pop" \
- : "=v" (__result)); \
- asm ("lui $3,%%tprel_hi(" #x ")\n\t" \
- "daddiu $3,$3,%%tprel_lo(" #x ")\n\t" \
- "daddu %0,%0,$3" \
- : "+r" (__result) : : "$3"); \
- __result; })
-#endif
# define SYS_ify(syscall_name) __NR_/**/syscall_name
#endif
-#ifdef __ASSEMBLER__
-
-/* We don't want the label for the error handler to be visible in the symbol
- table when we define it here. */
-#ifdef __PIC__
-# define SYSCALL_ERROR_LABEL 99b
-#endif
-
-#else /* ! __ASSEMBLER__ */
+#ifndef __ASSEMBLER__
/* Define a macro which expands into the inline wrapper code for a system
call. */
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
-#ifdef __PIC__
+# ifdef __PIC__
+# define PSEUDO_CPLOAD .cpload t9;
+# define PSEUDO_ERRJMP la t9, __syscall_error; jr t9;
+# define PSEUDO_SAVEGP sw gp, 32(sp); cfi_rel_offset (gp, 32);
+# define PSEUDO_LOADGP lw gp, 32(sp);
+# else
+# define PSEUDO_CPLOAD
+# define PSEUDO_ERRJMP j __syscall_error;
+# define PSEUDO_SAVEGP
+# define PSEUDO_LOADGP
+# endif
+
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.align 2; \
L(pseudo_start): \
cfi_startproc; \
- 99: la t9,__syscall_error; \
- jr t9; \
+ 99: PSEUDO_ERRJMP \
.type __##syscall_name##_nocancel, @function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
.set noreorder; \
- .cpload t9; \
+ PSEUDO_CPLOAD \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
- bne a3, zero, SYSCALL_ERROR_LABEL; \
+ bne a3, zero, 99b; \
ret; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
ENTRY (name) \
.set noreorder; \
- .cpload t9; \
+ PSEUDO_CPLOAD \
.set reorder; \
SINGLE_THREAD_P(v1); \
bne zero, v1, L(pseudo_cancel); \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
- bne a3, zero, SYSCALL_ERROR_LABEL; \
+ bne a3, zero, 99b; \
ret; \
L(pseudo_cancel): \
SAVESTK_##args; \
sw ra, 28(sp); \
cfi_rel_offset (ra, 28); \
- sw gp, 32(sp); \
- cfi_rel_offset (gp, 32); \
+ PSEUDO_SAVEGP \
PUSHARGS_##args; /* save syscall args */ \
CENABLE; \
- lw gp, 32(sp); \
+ PSEUDO_LOADGP \
sw v0, 44(sp); /* save mask */ \
POPARGS_##args; /* restore syscall args */ \
.set noreorder; \
sw a3, 40(sp); /* save syscall error flag */ \
lw a0, 44(sp); /* pass mask as arg1 */ \
CDISABLE; \
- lw gp, 32(sp); \
+ PSEUDO_LOADGP \
lw v0, 36(sp); /* restore syscall result */ \
lw a3, 40(sp); /* restore syscall error flag */ \
lw ra, 28(sp); /* restore return address */ \
.set noreorder; \
- bne a3, zero, SYSCALL_ERROR_LABEL; \
+ bne a3, zero, 99b; \
RESTORESTK; \
L(pseudo_end): \
.set reorder;
# undef PSEUDO_END
# define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
-#endif
-
# define PUSHARGS_0 /* nothing to do */
# define PUSHARGS_1 PUSHARGS_0 sw a0, 0(sp); cfi_rel_offset (a0, 0);
# define PUSHARGS_2 PUSHARGS_1 sw a1, 4(sp); cfi_rel_offset (a1, 4);
# define RESTORESTK addu sp, STKSPACE; cfi_adjust_cfa_offset(-STKSPACE)
+# ifdef __PIC__
/* We use jalr rather than jal. This means that the assembler will not
automatically restore $gp (in case libc has multiple GOTs) so we must
do it manually - which we have to do anyway since we don't use .cprestore.
It also shuts up the assembler warning about not using .cprestore. */
+# define PSEUDO_JMP(sym) la t9, sym; jalr t9;
+# else
+# define PSEUDO_JMP(sym) jal sym;
+# endif
+
# ifdef IS_IN_libpthread
-# define CENABLE la t9, __pthread_enable_asynccancel; jalr t9;
-# define CDISABLE la t9, __pthread_disable_asynccancel; jalr t9;
+# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
+# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
# elif defined IS_IN_librt
-# define CENABLE la t9, __librt_enable_asynccancel; jalr t9;
-# define CDISABLE la t9, __librt_disable_asynccancel; jalr t9;
+# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
+# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
# else
-# define CENABLE la t9, __libc_enable_asynccancel; jalr t9;
-# define CDISABLE la t9, __libc_disable_asynccancel; jalr t9;
+# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
+# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
# endif
# ifndef __ASSEMBLER__
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