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glibc/sysdeps/sparc/sparc64/dl-machine.h

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/* Machine-dependent ELF dynamic relocation inline functions. Sparc64 version.
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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,
void *const reloc_addr_arg)
{
Elf64_Addr *const reloc_addr = reloc_addr_arg;
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
|| (GLRO(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_arg, (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_arg) [0] = value >> 8;
((unsigned char *) reloc_addr_arg) [1] = value;
break;
case R_SPARC_UA32:
((unsigned char *) reloc_addr_arg) [0] = value >> 24;
((unsigned char *) reloc_addr_arg) [1] = value >> 16;
((unsigned char *) reloc_addr_arg) [2] = value >> 8;
((unsigned char *) reloc_addr_arg) [3] = value;
break;
case R_SPARC_UA64:
if (! ((long) reloc_addr_arg & 3))
{
/* Common in .eh_frame */
((unsigned int *) reloc_addr_arg) [0] = value >> 32;
((unsigned int *) reloc_addr_arg) [1] = value;
break;
}
((unsigned char *) reloc_addr_arg) [0] = value >> 56;
((unsigned char *) reloc_addr_arg) [1] = value >> 48;
((unsigned char *) reloc_addr_arg) [2] = value >> 40;
((unsigned char *) reloc_addr_arg) [3] = value >> 32;
((unsigned char *) reloc_addr_arg) [4] = value >> 24;
((unsigned char *) reloc_addr_arg) [5] = value >> 16;
((unsigned char *) reloc_addr_arg) [6] = value >> 8;
((unsigned char *) reloc_addr_arg) [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,
void *const reloc_addr_arg)
{
Elf64_Addr *const reloc_addr = reloc_addr_arg;
*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 (GLRO(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
/* Undo the sub %sp, 6*8, %sp; add %sp, STACK_BIAS + 22*8, %o0 below
to get at the value we want in __libc_stack_end. */
#define DL_STACK_END(cookie) \
((void *) (((long) (cookie)) - (22 - 6) * 8 - STACK_BIAS))
/* 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" \
" sethi %hi(_dl_skip_args), %g5\n" \
" add %l7, %o7, %l7\n" \
" or %g5, %lo(_dl_skip_args), %g5\n" \
" /* Save the user entry point address in %l0. */\n" \
" mov %o0, %l0\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" \
" 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");
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