Apply a patch from Magnus Damm <damm@opensource.se> to support
powerpc with busybox insmod -Erik
This commit is contained in:
Eric Andersen
parent
477aedd77f
commit
90fe7fea10
195
insmod.c
195
insmod.c
@ -14,6 +14,12 @@
|
||||
* very minor changes required to also work with StrongArm and presumably
|
||||
* all ARM based systems.
|
||||
*
|
||||
* Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
|
||||
* PowerPC specific code stolen from modutils-2.3.16,
|
||||
* written by Paul Mackerras, Copyright 1996, 1997 Linux International.
|
||||
* I've only tested the code on mpc8xx platforms in big-endian mode.
|
||||
* Did some cleanup and added BB_USE_xxx_ENTRIES...
|
||||
*
|
||||
* Based almost entirely on the Linux modutils-2.3.11 implementation.
|
||||
* Copyright 1996, 1997 Linux International.
|
||||
* New implementation contributed by Richard Henderson <rth@tamu.edu>
|
||||
@ -52,6 +58,28 @@
|
||||
#include <linux/unistd.h>
|
||||
#include "busybox.h"
|
||||
|
||||
#if defined(__powerpc__)
|
||||
#define BB_USE_PLT_ENTRIES
|
||||
#define BB_PLT_ENTRY_SIZE 16
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
#define BB_USE_PLT_ENTRIES
|
||||
#define BB_PLT_ENTRY_SIZE 8
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 8
|
||||
#endif
|
||||
|
||||
#if defined(__sh__)
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 4
|
||||
#endif
|
||||
|
||||
#if defined(__i386__)
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 4
|
||||
#endif
|
||||
|
||||
//----------------------------------------------------------------------------
|
||||
//--------modutils module.h, lines 45-242
|
||||
//----------------------------------------------------------------------------
|
||||
@ -81,7 +109,7 @@
|
||||
#ifndef MODUTILS_MODULE_H
|
||||
static const int MODUTILS_MODULE_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.49 2001/02/20 20:47:08 andersen Exp $"
|
||||
|
||||
/* This file contains the structures used by the 2.0 and 2.1 kernels.
|
||||
We do not use the kernel headers directly because we do not wish
|
||||
@ -287,7 +315,7 @@ int delete_module(const char *);
|
||||
#ifndef MODUTILS_OBJ_H
|
||||
static const int MODUTILS_OBJ_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.49 2001/02/20 20:47:08 andersen Exp $"
|
||||
|
||||
/* The relocatable object is manipulated using elfin types. */
|
||||
|
||||
@ -311,21 +339,27 @@ static const int MODUTILS_OBJ_H = 1;
|
||||
#endif
|
||||
|
||||
#define ELFCLASSM ELFCLASS32
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
|
||||
|
||||
#if defined(__sh__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_SH)
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#elif defined(__arm__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_ARM)
|
||||
#define SHT_RELM SHT_REL
|
||||
#define Elf32_RelM Elf32_Rel
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#elif defined(__powerpc__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_PPC)
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
#define ELFDATAM ELFDATA2MSB
|
||||
|
||||
#elif defined(__i386__)
|
||||
|
||||
@ -340,6 +374,7 @@ static const int MODUTILS_OBJ_H = 1;
|
||||
|
||||
#define SHT_RELM SHT_REL
|
||||
#define Elf32_RelM Elf32_Rel
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#else
|
||||
#error Sorry, but insmod.c does not yet support this architecture...
|
||||
@ -540,8 +575,10 @@ int flag_export = 1;
|
||||
|
||||
/* Done ;-) */
|
||||
|
||||
#if defined(__arm__)
|
||||
struct arm_plt_entry
|
||||
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct arch_plt_entry
|
||||
{
|
||||
int offset;
|
||||
int allocated:1;
|
||||
@ -549,26 +586,32 @@ struct arm_plt_entry
|
||||
};
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct arch_got_entry {
|
||||
int offset;
|
||||
unsigned offset_done:1;
|
||||
unsigned reloc_done:1;
|
||||
};
|
||||
#endif
|
||||
|
||||
struct arch_file {
|
||||
struct obj_file root;
|
||||
#if defined(__arm__)
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct obj_section *plt;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct obj_section *got;
|
||||
#endif
|
||||
};
|
||||
|
||||
struct arch_symbol {
|
||||
struct obj_symbol root;
|
||||
#if defined(__arm__)
|
||||
struct arm_plt_entry pltent;
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct arch_plt_entry pltent;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct arch_got_entry gotent;
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
@ -618,7 +661,8 @@ extern int delete_module(const char *);
|
||||
_syscall1(int, get_kernel_syms, struct old_kernel_sym *, ks)
|
||||
#endif
|
||||
|
||||
#if defined(__i386__) || defined(__m68k__) || defined(__arm__)
|
||||
#if defined(__i386__) || defined(__m68k__) || defined(__arm__) \
|
||||
|| defined(__powerpc__)
|
||||
/* Jump through hoops to fixup error return codes */
|
||||
#define __NR__create_module __NR_create_module
|
||||
static inline _syscall2(long, _create_module, const char *, name, size_t,
|
||||
@ -673,7 +717,14 @@ struct obj_file *arch_new_file(void)
|
||||
{
|
||||
struct arch_file *f;
|
||||
f = xmalloc(sizeof(*f));
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
f->plt = NULL;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
f->got = NULL;
|
||||
#endif
|
||||
|
||||
return &f->root;
|
||||
}
|
||||
|
||||
@ -686,7 +737,14 @@ struct obj_symbol *arch_new_symbol(void)
|
||||
{
|
||||
struct arch_symbol *sym;
|
||||
sym = xmalloc(sizeof(*sym));
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
memset(&sym->pltent, 0, sizeof(sym->pltent));
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
memset(&sym->gotent, 0, sizeof(sym->gotent));
|
||||
#endif
|
||||
|
||||
return &sym->root;
|
||||
}
|
||||
|
||||
@ -702,14 +760,14 @@ arch_apply_relocation(struct obj_file *f,
|
||||
|
||||
ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
|
||||
ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
|
||||
#if defined(__arm__)
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
|
||||
|
||||
struct arm_plt_entry *pe;
|
||||
struct arch_plt_entry *pe;
|
||||
unsigned long *ip;
|
||||
#endif
|
||||
|
||||
enum obj_reloc ret = obj_reloc_ok;
|
||||
|
||||
switch (ELF32_R_TYPE(rel->r_info)) {
|
||||
@ -723,6 +781,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_ARM_NONE:
|
||||
#elif defined(__i386__)
|
||||
case R_386_NONE:
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_NONE:
|
||||
#endif
|
||||
break;
|
||||
|
||||
@ -732,10 +792,26 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_ARM_ABS32:
|
||||
#elif defined(__i386__)
|
||||
case R_386_32:
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_ADDR32:
|
||||
#endif
|
||||
*loc += v;
|
||||
break;
|
||||
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_ADDR16_HA:
|
||||
*(unsigned short *)loc = (v + 0x8000) >> 16;
|
||||
break;
|
||||
|
||||
case R_PPC_ADDR16_HI:
|
||||
*(unsigned short *)loc = v >> 16;
|
||||
break;
|
||||
|
||||
case R_PPC_ADDR16_LO:
|
||||
*(unsigned short *)loc = v;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
#elif defined(__sh__)
|
||||
case R_SH_REL32:
|
||||
@ -746,22 +822,48 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_386_PC32:
|
||||
*loc += v - dot;
|
||||
break;
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_REL32:
|
||||
*loc = v - dot;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__sh__)
|
||||
case R_SH_PLT32:
|
||||
*loc = v - dot;
|
||||
break;
|
||||
#elif defined(__arm__)
|
||||
#elif defined(__i386__)
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
|
||||
#if defined(__arm__)
|
||||
case R_ARM_PC24:
|
||||
case R_ARM_PLT32:
|
||||
#endif
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_REL24:
|
||||
#endif
|
||||
/* find the plt entry and initialize it if necessary */
|
||||
assert(isym != NULL);
|
||||
pe = (struct arm_plt_entry*) &isym->pltent;
|
||||
|
||||
pe = (struct arch_plt_entry*) &isym->pltent;
|
||||
|
||||
if (! pe->inited) {
|
||||
ip = (unsigned long *) (ifile->plt->contents + pe->offset);
|
||||
|
||||
/* generate some machine code */
|
||||
|
||||
#if defined(__arm__)
|
||||
ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
|
||||
ip[1] = v; /* sym@ */
|
||||
#endif
|
||||
#if defined(__powerpc__)
|
||||
ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
|
||||
ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
|
||||
ip[2] = 0x7d6903a6; /* mtctr r11 */
|
||||
ip[3] = 0x4e800420; /* bctr */
|
||||
#endif
|
||||
pe->inited = 1;
|
||||
}
|
||||
|
||||
@ -775,15 +877,18 @@ arch_apply_relocation(struct obj_file *f,
|
||||
if (v & 3)
|
||||
ret = obj_reloc_dangerous;
|
||||
|
||||
/* merge the offset into the instruction. */
|
||||
#if defined(__arm__)
|
||||
/* Convert to words. */
|
||||
v >>= 2;
|
||||
|
||||
/* merge the offset into the instruction. */
|
||||
*loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
|
||||
break;
|
||||
#elif defined(__i386__)
|
||||
#endif
|
||||
|
||||
#if defined(__powerpc__)
|
||||
*loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
|
||||
#endif
|
||||
break;
|
||||
#endif /* BB_USE_PLT_ENTRIES */
|
||||
|
||||
#if defined(__arm__)
|
||||
#elif defined(__sh__)
|
||||
@ -809,6 +914,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
|
||||
#if defined(__sh__)
|
||||
case R_SH_GOTPC:
|
||||
#elif defined(__arm__)
|
||||
@ -857,6 +964,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
*loc += v - got;
|
||||
break;
|
||||
|
||||
#endif /* BB_USE_GOT_ENTRIES */
|
||||
|
||||
default:
|
||||
printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info));
|
||||
ret = obj_reloc_unhandled;
|
||||
@ -869,8 +978,11 @@ arch_apply_relocation(struct obj_file *f,
|
||||
int arch_create_got(struct obj_file *f)
|
||||
{
|
||||
struct arch_file *ifile = (struct arch_file *) f;
|
||||
int i, got_offset = 0, gotneeded = 0;
|
||||
#if defined(__arm__)
|
||||
int i;
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
int got_offset = 0, gotneeded = 0;
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
int plt_offset = 0, pltneeded = 0;
|
||||
#endif
|
||||
struct obj_section *relsec, *symsec, *strsec;
|
||||
@ -898,12 +1010,20 @@ int arch_create_got(struct obj_file *f)
|
||||
switch (ELF32_R_TYPE(rel->r_info)) {
|
||||
#if defined(__arm__)
|
||||
case R_ARM_GOT32:
|
||||
break;
|
||||
#elif defined(__sh__)
|
||||
case R_SH_GOT32:
|
||||
break;
|
||||
#elif defined(__i386__)
|
||||
case R_386_GOT32:
|
||||
#endif
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_REL24:
|
||||
pltneeded = 1;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
case R_ARM_PC24:
|
||||
@ -936,17 +1056,18 @@ int arch_create_got(struct obj_file *f)
|
||||
name = f->sections[extsym->st_shndx]->name;
|
||||
}
|
||||
intsym = (struct arch_symbol *) obj_find_symbol(f, name);
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
if (!intsym->gotent.offset_done) {
|
||||
intsym->gotent.offset_done = 1;
|
||||
intsym->gotent.offset = got_offset;
|
||||
got_offset += 4;
|
||||
got_offset += BB_GOT_ENTRY_SIZE;
|
||||
}
|
||||
#if defined(__arm__)
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
if (pltneeded && intsym->pltent.allocated == 0) {
|
||||
intsym->pltent.allocated = 1;
|
||||
intsym->pltent.offset = plt_offset;
|
||||
plt_offset += 8;
|
||||
plt_offset += BB_PLT_ENTRY_SIZE;
|
||||
intsym->pltent.inited = 0;
|
||||
pltneeded = 0;
|
||||
}
|
||||
@ -954,27 +1075,29 @@ int arch_create_got(struct obj_file *f)
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(__arm__)
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
if (got_offset) {
|
||||
struct obj_section* relsec = obj_find_section(f, ".got");
|
||||
|
||||
if (relsec) {
|
||||
obj_extend_section(relsec, got_offset);
|
||||
} else {
|
||||
relsec = obj_create_alloced_section(f, ".got", 8, got_offset);
|
||||
relsec = obj_create_alloced_section(f, ".got",
|
||||
BB_GOT_ENTRY_SIZE,
|
||||
got_offset);
|
||||
assert(relsec);
|
||||
}
|
||||
|
||||
ifile->got = relsec;
|
||||
}
|
||||
|
||||
if (plt_offset)
|
||||
ifile->plt = obj_create_alloced_section(f, ".plt", 8, plt_offset);
|
||||
#else
|
||||
if (got_offset > 0 || gotneeded)
|
||||
ifile->got = obj_create_alloced_section(f, ".got", 4, got_offset);
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
if (plt_offset)
|
||||
ifile->plt = obj_create_alloced_section(f, ".plt",
|
||||
BB_PLT_ENTRY_SIZE,
|
||||
plt_offset);
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
@ -14,6 +14,12 @@
|
||||
* very minor changes required to also work with StrongArm and presumably
|
||||
* all ARM based systems.
|
||||
*
|
||||
* Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
|
||||
* PowerPC specific code stolen from modutils-2.3.16,
|
||||
* written by Paul Mackerras, Copyright 1996, 1997 Linux International.
|
||||
* I've only tested the code on mpc8xx platforms in big-endian mode.
|
||||
* Did some cleanup and added BB_USE_xxx_ENTRIES...
|
||||
*
|
||||
* Based almost entirely on the Linux modutils-2.3.11 implementation.
|
||||
* Copyright 1996, 1997 Linux International.
|
||||
* New implementation contributed by Richard Henderson <rth@tamu.edu>
|
||||
@ -52,6 +58,28 @@
|
||||
#include <linux/unistd.h>
|
||||
#include "busybox.h"
|
||||
|
||||
#if defined(__powerpc__)
|
||||
#define BB_USE_PLT_ENTRIES
|
||||
#define BB_PLT_ENTRY_SIZE 16
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
#define BB_USE_PLT_ENTRIES
|
||||
#define BB_PLT_ENTRY_SIZE 8
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 8
|
||||
#endif
|
||||
|
||||
#if defined(__sh__)
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 4
|
||||
#endif
|
||||
|
||||
#if defined(__i386__)
|
||||
#define BB_USE_GOT_ENTRIES
|
||||
#define BB_GOT_ENTRY_SIZE 4
|
||||
#endif
|
||||
|
||||
//----------------------------------------------------------------------------
|
||||
//--------modutils module.h, lines 45-242
|
||||
//----------------------------------------------------------------------------
|
||||
@ -81,7 +109,7 @@
|
||||
#ifndef MODUTILS_MODULE_H
|
||||
static const int MODUTILS_MODULE_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.49 2001/02/20 20:47:08 andersen Exp $"
|
||||
|
||||
/* This file contains the structures used by the 2.0 and 2.1 kernels.
|
||||
We do not use the kernel headers directly because we do not wish
|
||||
@ -287,7 +315,7 @@ int delete_module(const char *);
|
||||
#ifndef MODUTILS_OBJ_H
|
||||
static const int MODUTILS_OBJ_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.49 2001/02/20 20:47:08 andersen Exp $"
|
||||
|
||||
/* The relocatable object is manipulated using elfin types. */
|
||||
|
||||
@ -311,21 +339,27 @@ static const int MODUTILS_OBJ_H = 1;
|
||||
#endif
|
||||
|
||||
#define ELFCLASSM ELFCLASS32
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
|
||||
|
||||
#if defined(__sh__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_SH)
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#elif defined(__arm__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_ARM)
|
||||
#define SHT_RELM SHT_REL
|
||||
#define Elf32_RelM Elf32_Rel
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#elif defined(__powerpc__)
|
||||
|
||||
#define MATCH_MACHINE(x) (x == EM_PPC)
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
#define ELFDATAM ELFDATA2MSB
|
||||
|
||||
#elif defined(__i386__)
|
||||
|
||||
@ -340,6 +374,7 @@ static const int MODUTILS_OBJ_H = 1;
|
||||
|
||||
#define SHT_RELM SHT_REL
|
||||
#define Elf32_RelM Elf32_Rel
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#else
|
||||
#error Sorry, but insmod.c does not yet support this architecture...
|
||||
@ -540,8 +575,10 @@ int flag_export = 1;
|
||||
|
||||
/* Done ;-) */
|
||||
|
||||
#if defined(__arm__)
|
||||
struct arm_plt_entry
|
||||
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct arch_plt_entry
|
||||
{
|
||||
int offset;
|
||||
int allocated:1;
|
||||
@ -549,26 +586,32 @@ struct arm_plt_entry
|
||||
};
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct arch_got_entry {
|
||||
int offset;
|
||||
unsigned offset_done:1;
|
||||
unsigned reloc_done:1;
|
||||
};
|
||||
#endif
|
||||
|
||||
struct arch_file {
|
||||
struct obj_file root;
|
||||
#if defined(__arm__)
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct obj_section *plt;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct obj_section *got;
|
||||
#endif
|
||||
};
|
||||
|
||||
struct arch_symbol {
|
||||
struct obj_symbol root;
|
||||
#if defined(__arm__)
|
||||
struct arm_plt_entry pltent;
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
struct arch_plt_entry pltent;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
struct arch_got_entry gotent;
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
@ -618,7 +661,8 @@ extern int delete_module(const char *);
|
||||
_syscall1(int, get_kernel_syms, struct old_kernel_sym *, ks)
|
||||
#endif
|
||||
|
||||
#if defined(__i386__) || defined(__m68k__) || defined(__arm__)
|
||||
#if defined(__i386__) || defined(__m68k__) || defined(__arm__) \
|
||||
|| defined(__powerpc__)
|
||||
/* Jump through hoops to fixup error return codes */
|
||||
#define __NR__create_module __NR_create_module
|
||||
static inline _syscall2(long, _create_module, const char *, name, size_t,
|
||||
@ -673,7 +717,14 @@ struct obj_file *arch_new_file(void)
|
||||
{
|
||||
struct arch_file *f;
|
||||
f = xmalloc(sizeof(*f));
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
f->plt = NULL;
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
f->got = NULL;
|
||||
#endif
|
||||
|
||||
return &f->root;
|
||||
}
|
||||
|
||||
@ -686,7 +737,14 @@ struct obj_symbol *arch_new_symbol(void)
|
||||
{
|
||||
struct arch_symbol *sym;
|
||||
sym = xmalloc(sizeof(*sym));
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
memset(&sym->pltent, 0, sizeof(sym->pltent));
|
||||
#endif
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
memset(&sym->gotent, 0, sizeof(sym->gotent));
|
||||
#endif
|
||||
|
||||
return &sym->root;
|
||||
}
|
||||
|
||||
@ -702,14 +760,14 @@ arch_apply_relocation(struct obj_file *f,
|
||||
|
||||
ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
|
||||
ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
|
||||
#if defined(__arm__)
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
|
||||
|
||||
struct arm_plt_entry *pe;
|
||||
struct arch_plt_entry *pe;
|
||||
unsigned long *ip;
|
||||
#endif
|
||||
|
||||
enum obj_reloc ret = obj_reloc_ok;
|
||||
|
||||
switch (ELF32_R_TYPE(rel->r_info)) {
|
||||
@ -723,6 +781,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_ARM_NONE:
|
||||
#elif defined(__i386__)
|
||||
case R_386_NONE:
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_NONE:
|
||||
#endif
|
||||
break;
|
||||
|
||||
@ -732,10 +792,26 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_ARM_ABS32:
|
||||
#elif defined(__i386__)
|
||||
case R_386_32:
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_ADDR32:
|
||||
#endif
|
||||
*loc += v;
|
||||
break;
|
||||
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_ADDR16_HA:
|
||||
*(unsigned short *)loc = (v + 0x8000) >> 16;
|
||||
break;
|
||||
|
||||
case R_PPC_ADDR16_HI:
|
||||
*(unsigned short *)loc = v >> 16;
|
||||
break;
|
||||
|
||||
case R_PPC_ADDR16_LO:
|
||||
*(unsigned short *)loc = v;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
#elif defined(__sh__)
|
||||
case R_SH_REL32:
|
||||
@ -746,22 +822,48 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_386_PC32:
|
||||
*loc += v - dot;
|
||||
break;
|
||||
#elif defined(__powerpc__)
|
||||
case R_PPC_REL32:
|
||||
*loc = v - dot;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__sh__)
|
||||
case R_SH_PLT32:
|
||||
*loc = v - dot;
|
||||
break;
|
||||
#elif defined(__arm__)
|
||||
#elif defined(__i386__)
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
|
||||
#if defined(__arm__)
|
||||
case R_ARM_PC24:
|
||||
case R_ARM_PLT32:
|
||||
#endif
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_REL24:
|
||||
#endif
|
||||
/* find the plt entry and initialize it if necessary */
|
||||
assert(isym != NULL);
|
||||
pe = (struct arm_plt_entry*) &isym->pltent;
|
||||
|
||||
pe = (struct arch_plt_entry*) &isym->pltent;
|
||||
|
||||
if (! pe->inited) {
|
||||
ip = (unsigned long *) (ifile->plt->contents + pe->offset);
|
||||
|
||||
/* generate some machine code */
|
||||
|
||||
#if defined(__arm__)
|
||||
ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
|
||||
ip[1] = v; /* sym@ */
|
||||
#endif
|
||||
#if defined(__powerpc__)
|
||||
ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
|
||||
ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
|
||||
ip[2] = 0x7d6903a6; /* mtctr r11 */
|
||||
ip[3] = 0x4e800420; /* bctr */
|
||||
#endif
|
||||
pe->inited = 1;
|
||||
}
|
||||
|
||||
@ -775,15 +877,18 @@ arch_apply_relocation(struct obj_file *f,
|
||||
if (v & 3)
|
||||
ret = obj_reloc_dangerous;
|
||||
|
||||
/* merge the offset into the instruction. */
|
||||
#if defined(__arm__)
|
||||
/* Convert to words. */
|
||||
v >>= 2;
|
||||
|
||||
/* merge the offset into the instruction. */
|
||||
*loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
|
||||
break;
|
||||
#elif defined(__i386__)
|
||||
#endif
|
||||
|
||||
#if defined(__powerpc__)
|
||||
*loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
|
||||
#endif
|
||||
break;
|
||||
#endif /* BB_USE_PLT_ENTRIES */
|
||||
|
||||
#if defined(__arm__)
|
||||
#elif defined(__sh__)
|
||||
@ -809,6 +914,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
|
||||
#if defined(__sh__)
|
||||
case R_SH_GOTPC:
|
||||
#elif defined(__arm__)
|
||||
@ -857,6 +964,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
*loc += v - got;
|
||||
break;
|
||||
|
||||
#endif /* BB_USE_GOT_ENTRIES */
|
||||
|
||||
default:
|
||||
printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info));
|
||||
ret = obj_reloc_unhandled;
|
||||
@ -869,8 +978,11 @@ arch_apply_relocation(struct obj_file *f,
|
||||
int arch_create_got(struct obj_file *f)
|
||||
{
|
||||
struct arch_file *ifile = (struct arch_file *) f;
|
||||
int i, got_offset = 0, gotneeded = 0;
|
||||
#if defined(__arm__)
|
||||
int i;
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
int got_offset = 0, gotneeded = 0;
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
int plt_offset = 0, pltneeded = 0;
|
||||
#endif
|
||||
struct obj_section *relsec, *symsec, *strsec;
|
||||
@ -898,12 +1010,20 @@ int arch_create_got(struct obj_file *f)
|
||||
switch (ELF32_R_TYPE(rel->r_info)) {
|
||||
#if defined(__arm__)
|
||||
case R_ARM_GOT32:
|
||||
break;
|
||||
#elif defined(__sh__)
|
||||
case R_SH_GOT32:
|
||||
break;
|
||||
#elif defined(__i386__)
|
||||
case R_386_GOT32:
|
||||
#endif
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_REL24:
|
||||
pltneeded = 1;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
case R_ARM_PC24:
|
||||
@ -936,17 +1056,18 @@ int arch_create_got(struct obj_file *f)
|
||||
name = f->sections[extsym->st_shndx]->name;
|
||||
}
|
||||
intsym = (struct arch_symbol *) obj_find_symbol(f, name);
|
||||
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
if (!intsym->gotent.offset_done) {
|
||||
intsym->gotent.offset_done = 1;
|
||||
intsym->gotent.offset = got_offset;
|
||||
got_offset += 4;
|
||||
got_offset += BB_GOT_ENTRY_SIZE;
|
||||
}
|
||||
#if defined(__arm__)
|
||||
#endif
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
if (pltneeded && intsym->pltent.allocated == 0) {
|
||||
intsym->pltent.allocated = 1;
|
||||
intsym->pltent.offset = plt_offset;
|
||||
plt_offset += 8;
|
||||
plt_offset += BB_PLT_ENTRY_SIZE;
|
||||
intsym->pltent.inited = 0;
|
||||
pltneeded = 0;
|
||||
}
|
||||
@ -954,27 +1075,29 @@ int arch_create_got(struct obj_file *f)
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(__arm__)
|
||||
#if defined(BB_USE_GOT_ENTRIES)
|
||||
if (got_offset) {
|
||||
struct obj_section* relsec = obj_find_section(f, ".got");
|
||||
|
||||
if (relsec) {
|
||||
obj_extend_section(relsec, got_offset);
|
||||
} else {
|
||||
relsec = obj_create_alloced_section(f, ".got", 8, got_offset);
|
||||
relsec = obj_create_alloced_section(f, ".got",
|
||||
BB_GOT_ENTRY_SIZE,
|
||||
got_offset);
|
||||
assert(relsec);
|
||||
}
|
||||
|
||||
ifile->got = relsec;
|
||||
}
|
||||
|
||||
if (plt_offset)
|
||||
ifile->plt = obj_create_alloced_section(f, ".plt", 8, plt_offset);
|
||||
#else
|
||||
if (got_offset > 0 || gotneeded)
|
||||
ifile->got = obj_create_alloced_section(f, ".got", 4, got_offset);
|
||||
#endif
|
||||
|
||||
#if defined(BB_USE_PLT_ENTRIES)
|
||||
if (plt_offset)
|
||||
ifile->plt = obj_create_alloced_section(f, ".plt",
|
||||
BB_PLT_ENTRY_SIZE,
|
||||
plt_offset);
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user