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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.
This commit is contained in:
Daniel Jacobowitz 2008-10-01 13:28:14 +00:00
parent a961a11ea2
commit 63fb881a04
10 changed files with 976 additions and 111 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
ChangeLog.mips
View File

@ -1,3 +1,42 @@
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

4
sysdeps/mips/bits/linkmap.h Normal file
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@ -0,0 +1,4 @@
struct link_map_machine
{
ElfW(Addr) plt; /* Address of .plt */
};

6
sysdeps/mips/dl-dtprocnum.h
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@ -17,6 +17,12 @@
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

581
sysdeps/mips/dl-lookup.c Normal file
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@ -0,0 +1,581 @@
/* 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,
&current_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,
&current_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
}

168
sysdeps/mips/dl-machine.h
View File

@ -25,8 +25,6 @@
#define ELF_MACHINE_NAME "MIPS"
#define ELF_MACHINE_NO_PLT
#include <entry.h>
#ifndef ENTRY_POINT
@ -55,11 +53,23 @@
".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. */
@ -73,6 +83,15 @@ do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \
(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)
@ -294,6 +313,24 @@ do { \
# 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
@ -461,6 +498,57 @@ elf_machine_reloc (struct link_map *map, ElfW(Addr) r_info,
#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
@ -504,9 +592,23 @@ elf_machine_rel_relative (ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
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
@ -537,13 +639,13 @@ elf_machine_got_rel (struct link_map *map, int lazy)
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; \
})
@ -584,25 +686,38 @@ elf_machine_got_rel (struct link_map *map, int lazy)
{
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;
@ -623,6 +738,7 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
# 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)
@ -649,6 +765,20 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
/* 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;
}

87
sysdeps/mips/dl-trampoline.c
View File

@ -200,7 +200,24 @@ __dl_runtime_resolve (ElfW(Word) sym_index,
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 */
@ -230,7 +247,24 @@ __dl_runtime_resolve (ElfW(Word) sym_index,
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
@ -270,3 +304,56 @@ _dl_runtime_resolve:\n\
.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\
");

37
sysdeps/mips/do-lookup.h Normal file
View File

@ -0,0 +1,37 @@
/* 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

98
sysdeps/mips/tls-macros.h
View File

@ -1,44 +1,56 @@
/* 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 TLS_GD(x) \
({ void *__result; \
extern void *__tls_get_addr (void *); \
asm ("daddiu %0, $28, %%tlsgd(" #x ")" \
: "=r" (__result)); \
(int *)__tls_get_addr (__result); })
# define LOAD_GP
# define UNLOAD_GP
#endif
#if _MIPS_SIM != _ABI64
# define TLS_LD(x) \
({ void *__result; \
# define TLS_GD(x) \
({ void *__result, *__tmp; \
extern void *__tls_get_addr (void *); \
asm ("addiu %0, $28, %%tlsldm(" #x ")" \
: "=r" (__result)); \
asm (LOAD_GP ADDIU " %0, $28, %%tlsgd(" #x ")" \
UNLOAD_GP \
: "=r" (__result), [tmp] "=&r" (__tmp)); \
(int *)__tls_get_addr (__result); })
# define TLS_LD(x) \
({ void *__result, *__tmp; \
extern void *__tls_get_addr (void *); \
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; \
@ -47,42 +59,6 @@
: "=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

10
sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
View File

@ -35,15 +35,7 @@
# 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. */

57
sysdeps/unix/sysv/linux/mips/nptl/sysdep-cancel.h
View File

@ -25,28 +25,38 @@
#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); \
@ -54,17 +64,16 @@
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; \
@ -75,12 +84,12 @@
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;
@ -88,8 +97,6 @@
# 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);
@ -136,19 +143,25 @@
# 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. */
# ifdef IS_IN_libpthread
# define CENABLE la t9, __pthread_enable_asynccancel; jalr t9;
# define CDISABLE la t9, __pthread_disable_asynccancel; jalr t9;
# elif defined IS_IN_librt
# define CENABLE la t9, __librt_enable_asynccancel; jalr t9;
# define CDISABLE la t9, __librt_disable_asynccancel; jalr t9;
# define PSEUDO_JMP(sym) la t9, sym; jalr t9;
# else
# define CENABLE la t9, __libc_enable_asynccancel; jalr t9;
# define CDISABLE la t9, __libc_disable_asynccancel; jalr t9;
# define PSEUDO_JMP(sym) jal sym;
# endif
# ifdef IS_IN_libpthread
# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
# elif defined IS_IN_librt
# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
# else
# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
# endif
# ifndef __ASSEMBLER__