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The table of masks applied for each relocation type was wrong for some

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relocs with 64bit targets, like GLOB_DAT.
Change some instruction patterns used for PLT slots, so -current
objdump -d shows what the comment says.
Fix encoding of %lox() in PLT slots "close" to -1.
Enhance debug output slightly.
This commit is contained in:
martin 2014-04-02 14:11:25 +00:00
parent c58d1d6541
commit b87a9303be
1 changed files with 13 additions and 13 deletions
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26
libexec/ld.elf_so/arch/sparc64/mdreloc.c
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@ -1,4 +1,4 @@
/* $NetBSD: mdreloc.c,v 1.55 2013/10/03 10:45:57 martin Exp $ */
/* $NetBSD: mdreloc.c,v 1.56 2014/04/02 14:11:25 martin Exp $ */
/*-
* Copyright (c) 2000 Eduardo Horvath.
@ -32,7 +32,7 @@
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: mdreloc.c,v 1.55 2013/10/03 10:45:57 martin Exp $");
__RCSID("$NetBSD: mdreloc.c,v 1.56 2014/04/02 14:11:25 martin Exp $");
#endif /* not lint */
#include <errno.h>
@ -170,7 +170,7 @@ static const long reloc_target_bitmask[] = {
_BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
_BM(10), _BM(22), /* _PC10, _PC22 */
_BM(30), 0, /* _WPLT30, _COPY */
_BM(32), _BM(32), _BM(32), /* _GLOB_DAT, JMP_SLOT, _RELATIVE */
-1, _BM(32), -1, /* _GLOB_DAT, JMP_SLOT, _RELATIVE */
_BM(32), _BM(32), /* _UA32, PLT32 */
_BM(22), _BM(10), /* _HIPLT22, LOPLT10 */
_BM(32), _BM(22), _BM(10), /* _PCPLT32, _PCPLT22, _PCPLT10 */
@ -192,18 +192,18 @@ static const long reloc_target_bitmask[] = {
/*
* Instruction templates:
*/
#define BAA 0x10400000 /* ba,a %xcc, 0 */
#define BAA 0x30680000 /* ba,a %xcc, 0 */
#define SETHI 0x03000000 /* sethi %hi(0), %g1 */
#define JMP 0x81c06000 /* jmpl %g1+%lo(0), %g0 */
#define NOP 0x01000000 /* sethi %hi(0), %g0 */
#define OR 0x82806000 /* or %g1, 0, %g1 */
#define XOR 0x82c06000 /* xor %g1, 0, %g1 */
#define MOV71 0x8283a000 /* or %o7, 0, %g1 */
#define MOV17 0x9c806000 /* or %g1, 0, %o7 */
#define OR 0x82106000 /* or %g1, 0, %g1 */
#define XOR 0x82186000 /* xor %g1, 0, %g1 */
#define MOV71 0x8213e000 /* or %o7, 0, %g1 */
#define MOV17 0x9e106000 /* or %g1, 0, %o7 */
#define CALL 0x40000000 /* call 0 */
#define SLLX 0x8b407000 /* sllx %g1, 0, %g1 */
#define SLLX 0x83287000 /* sllx %g1, 0, %g1 */
#define SETHIG5 0x0b000000 /* sethi %hi(0), %g5 */
#define ORG5 0x82804005 /* or %g1, %g5, %g1 */
#define ORG5 0x82104005 /* or %g1, %g5, %g1 */
/* %hi(v)/%lo(v) with variable shift */
@ -603,8 +603,8 @@ _rtld_relocate_plt_object(const Obj_Entry *obj, const Elf_Rela *rela,
return 0;
value = (Elf_Addr)(defobj->relocbase + def->st_value);
rdbg(("bind now/fixup in %s --> new=%p",
defobj->strtab + def->st_name, (void *)value));
rdbg(("bind now/fixup in %s at %p --> new=%p",
defobj->strtab + def->st_name, (void*)where, (void *)value));
/*
* At the PLT entry pointed at by `where', we now construct a direct
@ -696,7 +696,7 @@ _rtld_relocate_plt_object(const Obj_Entry *obj, const Elf_Rela *rela,
*
*/
where[3] = JMP;
where[2] = XOR | ((~value) & 0x00001fff);
where[2] = XOR | (value & 0x00003ff) | 0x1c00;
where[1] = SETHI | HIVAL(~value, 10);
__asm volatile("iflush %0+12" : : "r" (where));
__asm volatile("iflush %0+8" : : "r" (where));