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Diffstat (limited to 'sysdeps/sparc/sparc64/dl-machine.h')
-rw-r--r--sysdeps/sparc/sparc64/dl-machine.h172
1 files changed, 36 insertions, 136 deletions
diff --git a/sysdeps/sparc/sparc64/dl-machine.h b/sysdeps/sparc/sparc64/dl-machine.h
index 3eee672912..b4f43e9cf5 100644
--- a/sysdeps/sparc/sparc64/dl-machine.h
+++ b/sysdeps/sparc/sparc64/dl-machine.h
@@ -1,6 +1,6 @@
/* Machine-dependent ELF dynamic relocation inline functions. Sparc64 version.
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
- Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+ 2010 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
@@ -27,6 +27,7 @@
#include <sys/param.h>
#include <ldsodefs.h>
#include <sysdep.h>
+#include <dl-plt.h>
#ifndef VALIDX
# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \
@@ -89,132 +90,6 @@ elf_machine_load_address (void)
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 __attribute__ ((always_inline))
-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 __attribute__ ((always_inline))
elf_machine_fixup_plt (struct link_map *map, lookup_t t,
const Elf64_Rela *reloc,
@@ -549,6 +424,11 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
value += reloc->r_addend; /* Assume copy relocs have zero addend. */
+ if (sym != NULL
+ && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
+ && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+ value = ((Elf64_Addr (*) (void)) value) ();
+
switch (r_type)
{
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
@@ -576,6 +456,13 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
case R_SPARC_GLOB_DAT:
*reloc_addr = value;
break;
+ case R_SPARC_IRELATIVE:
+ value = ((Elf64_Addr (*) (void)) value) ();
+ *reloc_addr = value;
+ break;
+ case R_SPARC_JMP_IREL:
+ value = ((Elf64_Addr (*) (void)) value) ();
+ /* Fall thru */
case R_SPARC_JMP_SLOT:
#ifdef RESOLVE_CONFLICT_FIND_MAP
/* R_SPARC_JMP_SLOT conflicts against .plt[32768+]
@@ -757,16 +644,29 @@ __attribute__ ((always_inline))
elf_machine_lazy_rel (struct link_map *map,
Elf64_Addr l_addr, const Elf64_Rela *reloc)
{
- switch (ELF64_R_TYPE (reloc->r_info))
+ Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
+ const unsigned int r_type = ELF64_R_TYPE (reloc->r_info);
+
+ if (__builtin_expect (r_type == R_SPARC_JMP_SLOT, 1))
+ ;
+ else if (r_type == R_SPARC_JMP_IREL
+ || r_type == R_SPARC_IRELATIVE)
{
- 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;
+ Elf64_Addr value = map->l_addr + reloc->r_addend;
+ value = ((Elf64_Addr (*) (void)) value) ();
+ if (r_type == R_SPARC_JMP_IREL)
+ {
+ /* 'high' is always zero, for large PLT entries the linker
+ emits an R_SPARC_IRELATIVE. */
+ sparc64_fixup_plt (map, reloc, reloc_addr, value, 0, 0);
+ }
+ else
+ *reloc_addr = value;
}
+ else if (r_type == R_SPARC_NONE)
+ ;
+ else
+ _dl_reloc_bad_type (map, r_type, 1);
}
#endif /* RESOLVE_MAP */
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