mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-09 04:11:27 +08:00
8243d6f1b7
* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_load_address): Don't rely on *r_offset of R_SPARC_RELATIVE reloc in .got to contain the addend. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_load_address): Use the same l_addr computation. * sysdeps/sparc/sparc64/configure.in: Removed. * sysdeps/sparc/sparc64/configure: Removed. * config.h.in (SPARC64_DYNAMIC_BEFORE_GOT): Remove.
764 lines
24 KiB
C
764 lines
24 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. Sparc64 version.
|
|
Copyright (C) 1997,1998,1999,2000,2001,2002 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. */
|
|
|
|
#define ELF_MACHINE_NAME "sparc64"
|
|
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <ldsodefs.h>
|
|
#include <sysdep.h>
|
|
|
|
#ifndef VALIDX
|
|
# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \
|
|
+ DT_EXTRANUM + DT_VALTAGIDX (tag))
|
|
#endif
|
|
|
|
#define ELF64_R_TYPE_ID(info) ((info) & 0xff)
|
|
#define ELF64_R_TYPE_DATA(info) ((info) >> 8)
|
|
|
|
/* Return nonzero iff ELF header is compatible with the running host. */
|
|
static inline int
|
|
elf_machine_matches_host (const Elf64_Ehdr *ehdr)
|
|
{
|
|
return ehdr->e_machine == EM_SPARCV9;
|
|
}
|
|
|
|
/* We have to do this because elf_machine_{dynamic,load_address} can be
|
|
invoked from functions that have no GOT references, and thus the compiler
|
|
has no obligation to load the PIC register. */
|
|
#define LOAD_PIC_REG(PIC_REG) \
|
|
do { Elf64_Addr tmp; \
|
|
__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
|
|
"rd %%pc, %0\n\t" \
|
|
"add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t" \
|
|
"add %0, %1, %0" \
|
|
: "=r" (PIC_REG), "=r" (tmp)); \
|
|
} while (0)
|
|
|
|
/* Return the link-time address of _DYNAMIC. Conveniently, this is the
|
|
first element of the GOT. This must be inlined in a function which
|
|
uses global data. */
|
|
static inline Elf64_Addr
|
|
elf_machine_dynamic (void)
|
|
{
|
|
register Elf64_Addr *elf_pic_register __asm__("%l7");
|
|
|
|
LOAD_PIC_REG (elf_pic_register);
|
|
|
|
return *elf_pic_register;
|
|
}
|
|
|
|
/* Return the run-time load address of the shared object. */
|
|
static inline Elf64_Addr
|
|
elf_machine_load_address (void)
|
|
{
|
|
register Elf32_Addr *pc __asm ("%o7");
|
|
register Elf64_Addr *got __asm ("%l7");
|
|
|
|
__asm ("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t"
|
|
"call 1f\n\t"
|
|
" add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t"
|
|
"call _DYNAMIC\n\t"
|
|
"call _GLOBAL_OFFSET_TABLE_\n"
|
|
"1:\tadd %1, %0, %1\n\t" : "=r" (pc), "=r" (got));
|
|
|
|
/* got is now l_addr + _GLOBAL_OFFSET_TABLE_
|
|
*got is _DYNAMIC
|
|
pc[2]*4 is l_addr + _DYNAMIC - (long)pc - 8
|
|
pc[3]*4 is l_addr + _GLOBAL_OFFSET_TABLE_ - (long)pc - 12 */
|
|
return (Elf64_Addr) got - *got + (Elf32_Sword) ((pc[2] - pc[3]) * 4) - 4;
|
|
}
|
|
|
|
/* We have 4 cases to handle. And we code different code sequences
|
|
for each one. I love V9 code models... */
|
|
static inline void
|
|
sparc64_fixup_plt (struct link_map *map, const Elf64_Rela *reloc,
|
|
Elf64_Addr *reloc_addr, Elf64_Addr value,
|
|
Elf64_Addr high, int t)
|
|
{
|
|
unsigned int *insns = (unsigned int *) reloc_addr;
|
|
Elf64_Addr plt_vaddr = (Elf64_Addr) reloc_addr;
|
|
Elf64_Sxword disp = value - plt_vaddr;
|
|
|
|
/* Now move plt_vaddr up to the call instruction. */
|
|
plt_vaddr += ((t + 1) * 4);
|
|
|
|
/* PLT entries .PLT32768 and above look always the same. */
|
|
if (__builtin_expect (high, 0) != 0)
|
|
{
|
|
*reloc_addr = value - map->l_addr;
|
|
}
|
|
/* Near destination. */
|
|
else if (disp >= -0x800000 && disp < 0x800000)
|
|
{
|
|
/* As this is just one instruction, it is thread safe and so
|
|
we can avoid the unnecessary sethi FOO, %g1.
|
|
b,a target */
|
|
insns[0] = 0x30800000 | ((disp >> 2) & 0x3fffff);
|
|
__asm __volatile ("flush %0" : : "r" (insns));
|
|
}
|
|
/* 32-bit Sparc style, the target is in the lower 32-bits of
|
|
address space. */
|
|
else if (insns += t, (value >> 32) == 0)
|
|
{
|
|
/* sethi %hi(target), %g1
|
|
jmpl %g1 + %lo(target), %g0 */
|
|
|
|
insns[1] = 0x81c06000 | (value & 0x3ff);
|
|
__asm __volatile ("flush %0 + 4" : : "r" (insns));
|
|
|
|
insns[0] = 0x03000000 | ((unsigned int)(value >> 10));
|
|
__asm __volatile ("flush %0" : : "r" (insns));
|
|
}
|
|
/* We can also get somewhat simple sequences if the distance between
|
|
the target and the PLT entry is within +/- 2GB. */
|
|
else if ((plt_vaddr > value
|
|
&& ((plt_vaddr - value) >> 31) == 0)
|
|
|| (value > plt_vaddr
|
|
&& ((value - plt_vaddr) >> 31) == 0))
|
|
{
|
|
unsigned int displacement;
|
|
|
|
if (plt_vaddr > value)
|
|
displacement = (0 - (plt_vaddr - value));
|
|
else
|
|
displacement = value - plt_vaddr;
|
|
|
|
/* mov %o7, %g1
|
|
call displacement
|
|
mov %g1, %o7 */
|
|
|
|
insns[2] = 0x9e100001;
|
|
__asm __volatile ("flush %0 + 8" : : "r" (insns));
|
|
|
|
insns[1] = 0x40000000 | (displacement >> 2);
|
|
__asm __volatile ("flush %0 + 4" : : "r" (insns));
|
|
|
|
insns[0] = 0x8210000f;
|
|
__asm __volatile ("flush %0" : : "r" (insns));
|
|
}
|
|
/* Worst case, ho hum... */
|
|
else
|
|
{
|
|
unsigned int high32 = (value >> 32);
|
|
unsigned int low32 = (unsigned int) value;
|
|
|
|
/* ??? Some tricks can be stolen from the sparc64 egcs backend
|
|
constant formation code I wrote. -DaveM */
|
|
|
|
if (__builtin_expect (high32 & 0x3ff, 0))
|
|
{
|
|
/* sethi %hh(value), %g1
|
|
sethi %lm(value), %g5
|
|
or %g1, %hm(value), %g1
|
|
or %g5, %lo(value), %g5
|
|
sllx %g1, 32, %g1
|
|
jmpl %g1 + %g5, %g0
|
|
nop */
|
|
|
|
insns[5] = 0x81c04005;
|
|
__asm __volatile ("flush %0 + 20" : : "r" (insns));
|
|
|
|
insns[4] = 0x83287020;
|
|
__asm __volatile ("flush %0 + 16" : : "r" (insns));
|
|
|
|
insns[3] = 0x8a116000 | (low32 & 0x3ff);
|
|
__asm __volatile ("flush %0 + 12" : : "r" (insns));
|
|
|
|
insns[2] = 0x82106000 | (high32 & 0x3ff);
|
|
}
|
|
else
|
|
{
|
|
/* sethi %hh(value), %g1
|
|
sethi %lm(value), %g5
|
|
sllx %g1, 32, %g1
|
|
or %g5, %lo(value), %g5
|
|
jmpl %g1 + %g5, %g0
|
|
nop */
|
|
|
|
insns[4] = 0x81c04005;
|
|
__asm __volatile ("flush %0 + 16" : : "r" (insns));
|
|
|
|
insns[3] = 0x8a116000 | (low32 & 0x3ff);
|
|
__asm __volatile ("flush %0 + 12" : : "r" (insns));
|
|
|
|
insns[2] = 0x83287020;
|
|
}
|
|
|
|
__asm __volatile ("flush %0 + 8" : : "r" (insns));
|
|
|
|
insns[1] = 0x0b000000 | (low32 >> 10);
|
|
__asm __volatile ("flush %0 + 4" : : "r" (insns));
|
|
|
|
insns[0] = 0x03000000 | (high32 >> 10);
|
|
__asm __volatile ("flush %0" : : "r" (insns));
|
|
}
|
|
}
|
|
|
|
static inline Elf64_Addr
|
|
elf_machine_fixup_plt (struct link_map *map, lookup_t t,
|
|
const Elf64_Rela *reloc,
|
|
Elf64_Addr *reloc_addr, Elf64_Addr value)
|
|
{
|
|
sparc64_fixup_plt (map, reloc, reloc_addr, value + reloc->r_addend,
|
|
reloc->r_addend, 1);
|
|
return value;
|
|
}
|
|
|
|
/* Return the final value of a plt relocation. */
|
|
static inline Elf64_Addr
|
|
elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
|
|
Elf64_Addr value)
|
|
{
|
|
/* Don't add addend here, but in elf_machine_fixup_plt instead.
|
|
value + reloc->r_addend is the value which should actually be
|
|
stored into .plt data slot. */
|
|
return value;
|
|
}
|
|
|
|
#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_rela (struct link_map *map, const Elf64_Rela *reloc,
|
|
const Elf64_Sym *sym, const struct r_found_version *version,
|
|
Elf64_Addr *const reloc_addr)
|
|
{
|
|
const unsigned long int r_type = ELF64_R_TYPE_ID (reloc->r_info);
|
|
|
|
#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
|
|
if (__builtin_expect (r_type == R_SPARC_RELATIVE, 0))
|
|
*reloc_addr = map->l_addr + reloc->r_addend;
|
|
# ifndef RTLD_BOOTSTRAP
|
|
else if (r_type == R_SPARC_NONE) /* Who is Wilbur? */
|
|
return;
|
|
# endif
|
|
else
|
|
#endif
|
|
{
|
|
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
|
|
const Elf64_Sym *const refsym = sym;
|
|
#endif
|
|
Elf64_Addr value;
|
|
#ifndef RESOLVE_CONFLICT_FIND_MAP
|
|
if (sym->st_shndx != SHN_UNDEF &&
|
|
ELF64_ST_BIND (sym->st_info) == STB_LOCAL)
|
|
value = map->l_addr;
|
|
else
|
|
{
|
|
value = RESOLVE (&sym, version, r_type);
|
|
if (sym)
|
|
value += sym->st_value;
|
|
}
|
|
#else
|
|
value = 0;
|
|
#endif
|
|
value += reloc->r_addend; /* Assume copy relocs have zero addend. */
|
|
|
|
switch (r_type)
|
|
{
|
|
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
|
|
case R_SPARC_COPY:
|
|
if (sym == NULL)
|
|
/* This can happen in trace mode if an object could not be
|
|
found. */
|
|
break;
|
|
if (sym->st_size > refsym->st_size
|
|
|| (GL(dl_verbose) && sym->st_size < refsym->st_size))
|
|
{
|
|
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;
|
|
#endif
|
|
case R_SPARC_64:
|
|
case R_SPARC_GLOB_DAT:
|
|
*reloc_addr = value;
|
|
break;
|
|
#ifndef RTLD_BOOTSTRAP
|
|
case R_SPARC_8:
|
|
*(char *) reloc_addr = value;
|
|
break;
|
|
case R_SPARC_16:
|
|
*(short *) reloc_addr = value;
|
|
break;
|
|
case R_SPARC_32:
|
|
*(unsigned int *) reloc_addr = value;
|
|
break;
|
|
case R_SPARC_DISP8:
|
|
*(char *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
|
|
break;
|
|
case R_SPARC_DISP16:
|
|
*(short *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
|
|
break;
|
|
case R_SPARC_DISP32:
|
|
*(unsigned int *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
|
|
break;
|
|
case R_SPARC_WDISP30:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & 0xc0000000) |
|
|
((value - (Elf64_Addr) reloc_addr) >> 2));
|
|
break;
|
|
|
|
/* MEDLOW code model relocs */
|
|
case R_SPARC_LO10:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & ~0x3ff) |
|
|
(value & 0x3ff));
|
|
break;
|
|
case R_SPARC_HI22:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & 0xffc00000) |
|
|
(value >> 10));
|
|
break;
|
|
case R_SPARC_OLO10:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & ~0x1fff) |
|
|
(((value & 0x3ff) + ELF64_R_TYPE_DATA (reloc->r_info)) & 0x1fff));
|
|
break;
|
|
|
|
/* MEDMID code model relocs */
|
|
case R_SPARC_H44:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & 0xffc00000) |
|
|
(value >> 22));
|
|
break;
|
|
case R_SPARC_M44:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & ~0x3ff) |
|
|
((value >> 12) & 0x3ff));
|
|
break;
|
|
case R_SPARC_L44:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & ~0xfff) |
|
|
(value & 0xfff));
|
|
break;
|
|
|
|
/* MEDANY code model relocs */
|
|
case R_SPARC_HH22:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & 0xffc00000) |
|
|
(value >> 42));
|
|
break;
|
|
case R_SPARC_HM10:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & ~0x3ff) |
|
|
((value >> 32) & 0x3ff));
|
|
break;
|
|
case R_SPARC_LM22:
|
|
*(unsigned int *) reloc_addr =
|
|
((*(unsigned int *)reloc_addr & 0xffc00000) |
|
|
((value >> 10) & 0x003fffff));
|
|
break;
|
|
#endif
|
|
case R_SPARC_JMP_SLOT:
|
|
#ifdef RESOLVE_CONFLICT_FIND_MAP
|
|
/* R_SPARC_JMP_SLOT conflicts against .plt[32768+]
|
|
relocs should be turned into R_SPARC_64 relocs
|
|
in .gnu.conflict section.
|
|
r_addend non-zero does not mean it is a .plt[32768+]
|
|
reloc, instead it is the actual address of the function
|
|
to call. */
|
|
sparc64_fixup_plt (NULL, reloc, reloc_addr, value, 0, 0);
|
|
#else
|
|
sparc64_fixup_plt (map, reloc, reloc_addr, value,
|
|
reloc->r_addend, 0);
|
|
#endif
|
|
break;
|
|
#ifndef RTLD_BOOTSTRAP
|
|
case R_SPARC_UA16:
|
|
((unsigned char *) reloc_addr) [0] = value >> 8;
|
|
((unsigned char *) reloc_addr) [1] = value;
|
|
break;
|
|
case R_SPARC_UA32:
|
|
((unsigned char *) reloc_addr) [0] = value >> 24;
|
|
((unsigned char *) reloc_addr) [1] = value >> 16;
|
|
((unsigned char *) reloc_addr) [2] = value >> 8;
|
|
((unsigned char *) reloc_addr) [3] = value;
|
|
break;
|
|
case R_SPARC_UA64:
|
|
if (! ((long) reloc_addr & 3))
|
|
{
|
|
/* Common in .eh_frame */
|
|
((unsigned int *) reloc_addr) [0] = value >> 32;
|
|
((unsigned int *) reloc_addr) [1] = value;
|
|
break;
|
|
}
|
|
((unsigned char *) reloc_addr) [0] = value >> 56;
|
|
((unsigned char *) reloc_addr) [1] = value >> 48;
|
|
((unsigned char *) reloc_addr) [2] = value >> 40;
|
|
((unsigned char *) reloc_addr) [3] = value >> 32;
|
|
((unsigned char *) reloc_addr) [4] = value >> 24;
|
|
((unsigned char *) reloc_addr) [5] = value >> 16;
|
|
((unsigned char *) reloc_addr) [6] = value >> 8;
|
|
((unsigned char *) reloc_addr) [7] = value;
|
|
break;
|
|
#endif
|
|
#if !defined RTLD_BOOTSTRAP || defined _NDEBUG
|
|
default:
|
|
_dl_reloc_bad_type (map, r_type, 0);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
|
|
Elf64_Addr *const reloc_addr)
|
|
{
|
|
*reloc_addr = l_addr + reloc->r_addend;
|
|
}
|
|
|
|
static inline void
|
|
elf_machine_lazy_rel (struct link_map *map,
|
|
Elf64_Addr l_addr, const Elf64_Rela *reloc)
|
|
{
|
|
switch (ELF64_R_TYPE (reloc->r_info))
|
|
{
|
|
case R_SPARC_NONE:
|
|
break;
|
|
case R_SPARC_JMP_SLOT:
|
|
break;
|
|
default:
|
|
_dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#endif /* RESOLVE */
|
|
|
|
/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
|
|
PLT entries should not be allowed to define the value.
|
|
ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
|
|
of the main executable's symbols, as for a COPY reloc. */
|
|
#define elf_machine_type_class(type) \
|
|
((((type) == R_SPARC_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
|
|
| (((type) == R_SPARC_COPY) * ELF_RTYPE_CLASS_COPY))
|
|
|
|
/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
|
|
#define ELF_MACHINE_JMP_SLOT R_SPARC_JMP_SLOT
|
|
|
|
/* The SPARC never uses Elf64_Rel relocations. */
|
|
#define ELF_MACHINE_NO_REL 1
|
|
|
|
/* The SPARC overlaps DT_RELA and DT_PLTREL. */
|
|
#define ELF_MACHINE_PLTREL_OVERLAP 1
|
|
|
|
/* Set up the loaded object described by L so its unrelocated PLT
|
|
entries will jump to the on-demand fixup code in dl-runtime.c. */
|
|
|
|
static inline int
|
|
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
|
{
|
|
if (l->l_info[DT_JMPREL] && lazy)
|
|
{
|
|
extern void _dl_runtime_resolve_0 (void);
|
|
extern void _dl_runtime_resolve_1 (void);
|
|
extern void _dl_runtime_profile_0 (void);
|
|
extern void _dl_runtime_profile_1 (void);
|
|
Elf64_Addr res0_addr, res1_addr;
|
|
unsigned int *plt = (void *) D_PTR (l, l_info[DT_PLTGOT]);
|
|
int i = 0;
|
|
|
|
if (! profile)
|
|
{
|
|
res0_addr = (Elf64_Addr) &_dl_runtime_resolve_0;
|
|
res1_addr = (Elf64_Addr) &_dl_runtime_resolve_1;
|
|
}
|
|
else
|
|
{
|
|
res0_addr = (Elf64_Addr) &_dl_runtime_profile_0;
|
|
res1_addr = (Elf64_Addr) &_dl_runtime_profile_1;
|
|
if (_dl_name_match_p (GL(dl_profile), l))
|
|
GL(dl_profile_map) = l;
|
|
}
|
|
|
|
/* PLT0 looks like:
|
|
|
|
save %sp, -192, %sp
|
|
sethi %hh(_dl_runtime_{resolve,profile}_0), %l0
|
|
sethi %lm(_dl_runtime_{resolve,profile}_0), %l1
|
|
or %l0, %hm(_dl_runtime_{resolve,profile}_0), %l0
|
|
or %l1, %lo(_dl_runtime_{resolve,profile}_0), %l1
|
|
sllx %l0, 32, %l0
|
|
jmpl %l0 + %l1, %l6
|
|
sethi %hi(0xffc00), %l2
|
|
*/
|
|
|
|
plt[0] = 0x9de3bf40;
|
|
plt[1] = 0x21000000 | (res0_addr >> (64 - 22));
|
|
plt[2] = 0x23000000 | ((res0_addr >> 10) & 0x003fffff);
|
|
plt[3] = 0xa0142000 | ((res0_addr >> 32) & 0x3ff);
|
|
plt[4] = 0xa2146000 | (res0_addr & 0x3ff);
|
|
plt[5] = 0xa12c3020;
|
|
plt[6] = 0xadc40011;
|
|
plt[7] = 0x250003ff;
|
|
|
|
/* PLT1 looks like:
|
|
|
|
save %sp, -192, %sp
|
|
sethi %hh(_dl_runtime_{resolve,profile}_1), %l0
|
|
sethi %lm(_dl_runtime_{resolve,profile}_1), %l1
|
|
or %l0, %hm(_dl_runtime_{resolve,profile}_1), %l0
|
|
or %l1, %lo(_dl_runtime_{resolve,profile}_1), %l1
|
|
sllx %l0, 32, %l0
|
|
jmpl %l0 + %l1, %l6
|
|
srlx %g1, 12, %o1
|
|
*/
|
|
|
|
plt[8 + 0] = 0x9de3bf40;
|
|
if (__builtin_expect (((res1_addr + 4) >> 32) & 0x3ff, 0))
|
|
i = 1;
|
|
else
|
|
res1_addr += 4;
|
|
plt[8 + 1] = 0x21000000 | (res1_addr >> (64 - 22));
|
|
plt[8 + 2] = 0x23000000 | ((res1_addr >> 10) & 0x003fffff);
|
|
if (__builtin_expect (i, 0))
|
|
plt[8 + 3] = 0xa0142000 | ((res1_addr >> 32) & 0x3ff);
|
|
else
|
|
plt[8 + 3] = 0xa12c3020;
|
|
plt[8 + 4] = 0xa2146000 | (res1_addr & 0x3ff);
|
|
if (__builtin_expect (i, 0))
|
|
plt[8 + 5] = 0xa12c3020;
|
|
plt[8 + 5 + i] = 0xadc40011;
|
|
plt[8 + 6 + i] = 0x9330700c;
|
|
|
|
/* Now put the magic cookie at the beginning of .PLT2
|
|
Entry .PLT3 is unused by this implementation. */
|
|
*((struct link_map **)(&plt[16 + 0])) = l;
|
|
|
|
if (__builtin_expect (l->l_info[VALIDX(DT_GNU_PRELINKED)] != NULL, 0)
|
|
|| __builtin_expect (l->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL, 0))
|
|
{
|
|
/* Need to reinitialize .plt to undo prelinking. */
|
|
Elf64_Rela *rela = (Elf64_Rela *) D_PTR (l, l_info[DT_JMPREL]);
|
|
Elf64_Rela *relaend
|
|
= (Elf64_Rela *) ((char *) rela
|
|
+ l->l_info[DT_PLTRELSZ]->d_un.d_val);
|
|
|
|
/* prelink must ensure there are no R_SPARC_NONE relocs left
|
|
in .rela.plt. */
|
|
while (rela < relaend)
|
|
{
|
|
if (__builtin_expect (rela->r_addend, 0) != 0)
|
|
{
|
|
Elf64_Addr slot = ((rela->r_offset + 0x400
|
|
- (Elf64_Addr) plt)
|
|
/ 0x1400) * 0x1400
|
|
+ (Elf64_Addr) plt - 0x400;
|
|
/* ldx [%o7 + X], %g1 */
|
|
unsigned int first_ldx = *(unsigned int *)(slot + 12);
|
|
Elf64_Addr ptr = slot + (first_ldx & 0xfff) + 4;
|
|
|
|
*(Elf64_Addr *) rela->r_offset
|
|
= (Elf64_Addr) plt
|
|
- (slot + ((rela->r_offset - ptr) / 8) * 24 + 4);
|
|
++rela;
|
|
continue;
|
|
}
|
|
|
|
*(unsigned int *) rela->r_offset
|
|
= 0x03000000 | (rela->r_offset - (Elf64_Addr) plt);
|
|
*(unsigned int *) (rela->r_offset + 4)
|
|
= 0x30680000 | ((((Elf64_Addr) plt + 32
|
|
- rela->r_offset - 4) >> 2) & 0x7ffff);
|
|
__asm __volatile ("flush %0" : : "r" (rela->r_offset));
|
|
__asm __volatile ("flush %0+4" : : "r" (rela->r_offset));
|
|
++rela;
|
|
}
|
|
}
|
|
}
|
|
|
|
return lazy;
|
|
}
|
|
|
|
/* This code is used in dl-runtime.c to call the `fixup' function
|
|
and then redirect to the address it returns. */
|
|
#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \
|
|
asm ("\n" \
|
|
" .text\n" \
|
|
" .globl " #tramp_name "_0\n" \
|
|
" .type " #tramp_name "_0, @function\n" \
|
|
" .align 32\n" \
|
|
"\t" #tramp_name "_0:\n" \
|
|
" ! sethi %hi(1047552), %l2 - Done in .PLT0\n" \
|
|
" ldx [%l6 + 32 + 8], %o0\n" \
|
|
" sub %g1, %l6, %l0\n" \
|
|
" xor %l2, -1016, %l2\n" \
|
|
" sethi %hi(5120), %l3 ! 160 * 32\n" \
|
|
" add %l0, %l2, %l0\n" \
|
|
" sethi %hi(32768), %l4\n" \
|
|
" udivx %l0, %l3, %l3\n" \
|
|
" sllx %l3, 2, %l1\n" \
|
|
" add %l1, %l3, %l1\n" \
|
|
" sllx %l1, 10, %l2\n" \
|
|
" sub %l4, 4, %l4 ! No thanks to Sun for not obeying their own ABI\n" \
|
|
" sllx %l1, 5, %l1\n" \
|
|
" sub %l0, %l2, %l0\n" \
|
|
" udivx %l0, 24, %l0\n" \
|
|
" add %l0, %l4, %l0\n" \
|
|
" add %l1, %l0, %l1\n" \
|
|
" add %l1, %l1, %l0\n" \
|
|
" add %l0, %l1, %l0\n" \
|
|
" mov %i7, %o2\n" \
|
|
" call " #fixup_name "\n" \
|
|
" sllx %l0, 3, %o1\n" \
|
|
" jmp %o0\n" \
|
|
" restore\n" \
|
|
" .size " #tramp_name "_0, . - " #tramp_name "_0\n" \
|
|
"\n" \
|
|
" .globl " #tramp_name "_1\n" \
|
|
" .type " #tramp_name "_1, @function\n" \
|
|
" ! tramp_name_1 + 4 needs to be .align 32\n" \
|
|
"\t" #tramp_name "_1:\n" \
|
|
" sub %l6, 4, %l6\n" \
|
|
" ! srlx %g1, 12, %o1 - Done in .PLT1\n" \
|
|
" ldx [%l6 + 12], %o0\n" \
|
|
" add %o1, %o1, %o3\n" \
|
|
" sub %o1, 96, %o1 ! No thanks to Sun for not obeying their own ABI\n" \
|
|
" mov %i7, %o2\n" \
|
|
" call " #fixup_name "\n" \
|
|
" add %o1, %o3, %o1\n" \
|
|
" jmp %o0\n" \
|
|
" restore\n" \
|
|
" .size " #tramp_name "_1, . - " #tramp_name "_1\n" \
|
|
" .previous\n");
|
|
|
|
#ifndef PROF
|
|
#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
|
|
#else
|
|
#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
|
|
TRAMPOLINE_TEMPLATE (_dl_runtime_profile, fixup);
|
|
#endif
|
|
|
|
/* The PLT uses Elf64_Rela relocs. */
|
|
#define elf_machine_relplt elf_machine_rela
|
|
|
|
/* Initial entry point code for the dynamic linker.
|
|
The C function `_dl_start' is the real entry point;
|
|
its return value is the user program's entry point. */
|
|
|
|
#define __S1(x) #x
|
|
#define __S(x) __S1(x)
|
|
|
|
#define RTLD_START __asm__ ( "\n" \
|
|
" .text\n" \
|
|
" .global _start\n" \
|
|
" .type _start, @function\n" \
|
|
" .align 32\n" \
|
|
"_start:\n" \
|
|
" /* Make room for functions to drop their arguments on the stack. */\n" \
|
|
" sub %sp, 6*8, %sp\n" \
|
|
" /* Pass pointer to argument block to _dl_start. */\n" \
|
|
" call _dl_start\n" \
|
|
" add %sp," __S(STACK_BIAS) "+22*8,%o0\n" \
|
|
" /* FALLTHRU */\n" \
|
|
" .size _start, .-_start\n" \
|
|
"\n" \
|
|
" .global _dl_start_user\n" \
|
|
" .type _dl_start_user, @function\n" \
|
|
"_dl_start_user:\n" \
|
|
" /* Load the GOT register. */\n" \
|
|
"1: call 11f\n" \
|
|
" sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n" \
|
|
"11: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n" \
|
|
" /* Store the highest stack address. */\n" \
|
|
" sethi %hi(__libc_stack_end), %g5\n" \
|
|
" add %l7, %o7, %l7\n" \
|
|
" or %g5, %lo(__libc_stack_end), %g5\n" \
|
|
" /* Save the user entry point address in %l0. */\n" \
|
|
" mov %o0, %l0\n" \
|
|
" ldx [%l7 + %g5], %l1\n" \
|
|
" sethi %hi(_dl_skip_args), %g5\n" \
|
|
" add %sp, 6*8, %l2\n" \
|
|
" /* See if we were run as a command with the executable file name as an\n" \
|
|
" extra leading argument. If so, we must shift things around since we\n" \
|
|
" must keep the stack doubleword aligned. */\n" \
|
|
" or %g5, %lo(_dl_skip_args), %g5\n" \
|
|
" stx %l2, [%l1]\n" \
|
|
" ldx [%l7 + %g5], %i0\n" \
|
|
" ld [%i0], %i0\n" \
|
|
" brz,pt %i0, 2f\n" \
|
|
" ldx [%sp + " __S(STACK_BIAS) " + 22*8], %i5\n" \
|
|
" /* Find out how far to shift. */\n" \
|
|
" sethi %hi(_dl_argv), %l4\n" \
|
|
" sub %i5, %i0, %i5\n" \
|
|
" or %l4, %lo(_dl_argv), %l4\n" \
|
|
" sllx %i0, 3, %l6\n" \
|
|
" ldx [%l7 + %l4], %l4\n" \
|
|
" stx %i5, [%sp + " __S(STACK_BIAS) " + 22*8]\n" \
|
|
" add %sp, " __S(STACK_BIAS) " + 23*8, %i1\n" \
|
|
" add %i1, %l6, %i2\n" \
|
|
" ldx [%l4], %l5\n" \
|
|
" /* Copy down argv. */\n" \
|
|
"12: ldx [%i2], %i3\n" \
|
|
" add %i2, 8, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" brnz,pt %i3, 12b\n" \
|
|
" add %i1, 8, %i1\n" \
|
|
" sub %l5, %l6, %l5\n" \
|
|
" /* Copy down envp. */\n" \
|
|
"13: ldx [%i2], %i3\n" \
|
|
" add %i2, 8, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" brnz,pt %i3, 13b\n" \
|
|
" add %i1, 8, %i1\n" \
|
|
" /* Copy down auxiliary table. */\n" \
|
|
"14: ldx [%i2], %i3\n" \
|
|
" ldx [%i2 + 8], %i4\n" \
|
|
" add %i2, 16, %i2\n" \
|
|
" stx %i3, [%i1]\n" \
|
|
" stx %i4, [%i1 + 8]\n" \
|
|
" brnz,pt %i3, 14b\n" \
|
|
" add %i1, 16, %i1\n" \
|
|
" stx %l5, [%l4]\n" \
|
|
" /* %o0 = _dl_loaded, %o1 = argc, %o2 = argv, %o3 = envp. */\n" \
|
|
"2: sethi %hi(_rtld_local), %o0\n" \
|
|
" add %sp, " __S(STACK_BIAS) " + 23*8, %o2\n" \
|
|
" orcc %o0, %lo(_rtld_local), %o0\n" \
|
|
" sllx %i5, 3, %o3\n" \
|
|
" ldx [%l7 + %o0], %o0\n" \
|
|
" add %o3, 8, %o3\n" \
|
|
" mov %i5, %o1\n" \
|
|
" add %o2, %o3, %o3\n" \
|
|
" call _dl_init_internal\n" \
|
|
" ldx [%o0], %o0\n" \
|
|
" /* Pass our finalizer function to the user in %g1. */\n" \
|
|
" sethi %hi(_dl_fini), %g1\n" \
|
|
" or %g1, %lo(_dl_fini), %g1\n" \
|
|
" ldx [%l7 + %g1], %g1\n" \
|
|
" /* Jump to the user's entry point and deallocate the extra stack we got. */\n" \
|
|
" jmp %l0\n" \
|
|
" add %sp, 6*8, %sp\n" \
|
|
" .size _dl_start_user, . - _dl_start_user\n" \
|
|
" .previous\n");
|