/branches/dynload/uspace/lib/rtld/arch/ppc32/_link.ld.in |
---|
0,0 → 1,86 |
ENTRY(__entry) |
PHDRS { |
text PT_LOAD FLAGS(5); |
data PT_LOAD FLAGS(6); |
} |
SECTIONS { |
. = 0x1000; |
.init ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.init); |
} :text |
.text : { |
*(.text); |
*(.rodata*); |
} :text |
.rel.plt ALIGN(0x1000) : { |
*(.rel.plt); |
} |
/* |
*.rel.dyn MUST FOLLOW IMMEDIATELY after .rel.plt |
* without alignment gap or DT_REL will be broken |
*/ |
.rel.dyn : { |
*(.rel.*); |
} :text |
.dynamic ALIGN(0x1000) : { |
*(.dynamic); |
} :text |
.dynsym ALIGN(0x1000) : { |
*(.dynsym); |
} :text |
.dynstr ALIGN(0x1000) : { |
*(.dynstr); |
} :text |
/* data segment */ |
. = ALIGN(0x1000); |
.data ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.data); |
*(.sdata); |
} :data |
.dynamic ALIGN(0x1000) : { |
*(.dynamic); |
} :text |
.dynsym ALIGN(0x1000) : { |
*(.dynsym); |
} :text |
.dynstr ALIGN(0x1000) : { |
*(.dynstr); |
} :text |
.tdata : { |
_tdata_start = .; |
*(.tdata); |
_tdata_end = .; |
} :data |
.tbss : { |
_tbss_start = .; |
*(.tbss); |
_tbss_end = .; |
} :data |
_tls_alignment = MAX(ALIGNOF(.tdata), ALIGNOF(.tbss)); |
.bss : { |
*(.sbss); |
*(COMMON); |
*(.bss); |
} :data |
/* On ppc32 the plt section is uninitialized and must be here! */ |
.plt ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.plt); |
} :data |
. = ALIGN(0x1000); |
_heap = .; |
} |
/branches/dynload/uspace/lib/rtld/arch/ppc32/include/elf_dyn.h |
---|
0,0 → 1,50 |
/* |
* Copyright (c) 2008 Jiri Svoboda |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup generic |
* @{ |
*/ |
/** @file |
*/ |
#ifndef ppc32_ELF_DYN_H_ |
#define ppc32_ELF_DYN_H_ |
/* |
* ppc32 dynamic relocation types |
*/ |
#define R_PPC_ADDR32 1 |
#define R_PPC_REL24 10 |
#define R_PPC_JMP_SLOT 21 |
#define R_PPC_RELATIVE 22 |
#endif |
/** @} |
*/ |
/branches/dynload/uspace/lib/rtld/arch/ppc32/Makefile.inc |
---|
0,0 → 1,36 |
# |
# Copyright (c) 2008 Jiri Svoboda |
# All rights reserved. |
# |
# Redistribution and use in source and binary forms, with or without |
# modification, are permitted provided that the following conditions |
# are met: |
# |
# - Redistributions of source code must retain the above copyright |
# notice, this list of conditions and the following disclaimer. |
# - Redistributions in binary form must reproduce the above copyright |
# notice, this list of conditions and the following disclaimer in the |
# documentation and/or other materials provided with the distribution. |
# - The name of the author may not be used to endorse or promote products |
# derived from this software without specific prior written permission. |
# |
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
# |
CFLAGS += -D__32_BITS__ -fno-jump-tables |
LFLAGS += -e __bootstrap |
ARCH_SOURCES := \ |
arch/$(ARCH)/src/bootstrap.c \ |
arch/$(ARCH)/src/runtime.c |
# arch/$(ARCH)/src/reloc.c |
/branches/dynload/uspace/lib/rtld/arch/ppc32/src/runtime.c |
---|
0,0 → 1,72 |
/* |
* Copyright (c) 2008 Jiri Svoboda |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup rtld rtld |
* @brief |
* @{ |
*/ |
/** |
* @file |
*/ |
#include <sys/types.h> |
#include <align.h> |
#include <tls.h> |
static void kputint(unsigned i) |
{ |
asm volatile ( |
"mr %%r3, %0\n" |
"li %%r9, 30\n" |
"sc\n" |
: |
: "r" (i) |
: "%r3","%r9" |
) ; |
} |
typedef struct { |
unsigned long int ti_module; |
unsigned long int ti_offset; |
} tls_index; |
void *__tls_get_addr(tls_index *ti); |
/* ppc32 uses TLS variant 1 */ |
void *__tls_get_addr(tls_index *ti) |
{ |
uint8_t *tls; |
/* The TLS section is just after TCB */ |
tls = (uint8_t *)__tcb_get() + sizeof(tcb_t); |
return tls + ti->ti_offset; |
} |
/** @} |
*/ |
/branches/dynload/uspace/lib/rtld/arch/ppc32/src/bootstrap.c |
---|
0,0 → 1,326 |
/* |
* Copyright (c) 2008 Jiri Svoboda |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup rtld rtld |
* @brief |
* @{ |
*/ |
/** |
* @file |
*/ |
#include <elf_dyn.h> |
#include <rtld.h> |
#include <pcb.h> |
// for testing printf |
#include <stdio.h> |
void __main(void); |
void __io_init(void); |
void __exit(void); |
static void kputint(unsigned i) |
{ |
asm volatile ( |
"mr %%r3, %0\n" |
"li %%r9, 30\n" |
"sc\n" |
: |
: "r" (i) |
: "%r3","%r9" |
) ; |
} |
#define __L(ptr) ((uint32_t)(ptr) & 0x0000ffff) |
#define __HA(ptr) ((uint32_t)(ptr) >> 16) |
// ldis r11, .PLTtable@ha |
static inline uint32_t _ldis(unsigned rD, uint16_t imm16) |
{ |
/* Special case of addis: ldis rD,SIMM == addis rD,0,SIMM */ |
return 0x3C000000 | (rD << 21) | imm16; |
} |
static inline uint32_t _lwz(unsigned rD, uint16_t disp16, unsigned rA) |
{ |
return 0x80000000 | (rD << 21) | (rA << 16) | disp16; |
} |
static inline uint32_t _mtctr(unsigned rS) |
{ |
/* mtctr rD == mtspr 9, rD */ |
return 0x7c0003a6 | (rS << 21) | (9/*CTR*/ << 16); |
} |
static inline uint32_t _bctr() |
{ |
/* bcctr 0x1f, 0 */ |
return 0x4c000420 | (0x1f/*always*/ << 21); |
} |
/* branch */ |
static inline uint32_t _b(uint32_t *addr, uint32_t *location) |
{ |
uint32_t raddr = ((uint32_t)addr - (uint32_t)location) & 0x03fffffc; |
return 0x48000000 | raddr; |
} |
void test_func(void) |
{ |
kputint(-1); |
kputint(42); |
kputint(-1); |
} |
void __bootstrap(void); |
void __bootstrap(void) |
{ |
unsigned bias; |
uint32_t *plt; |
elf_dyn_t *dynamic; |
void *dptr; |
unsigned dval; |
int i; |
size_t rel_entries; |
size_t r_offset; |
elf_word r_info; |
unsigned rel_type; |
elf_word sym_idx; |
uintptr_t sym_addr; |
elf_symbol_t *sym_table; |
elf_rela_t *rel_table; |
elf_rela_t *jmp_rel_table; |
size_t jmp_rel_entries; |
pcb_t *pcb; |
uint32_t a, res; |
uint32_t *r_ptr; |
uint32_t *_plt_ent; |
kputint(42); |
pcb = __pcb_get(); |
/* The program loader (iloader) kindly provided us with these */ |
dynamic = pcb->rtld_dynamic; |
bias = pcb->rtld_bias; |
kputint(bias); |
kputint((unsigned)dynamic); |
/* parse DYNAMIC */ |
plt = 0; |
sym_table = 0; |
rel_table = 0; |
rel_entries = 0; |
jmp_rel_table = 0; |
jmp_rel_entries = 0; |
i = 0; |
while (dynamic[i].d_tag != 0) { |
// kputint((uintptr_t)&dynamic[i]); |
// kputint((uintptr_t)&(dynamic[i].d_tag)); |
// kputint(dynamic[i].d_tag); |
dptr = (void *)(dynamic[i].d_un.d_val + bias); |
dval = dynamic[i].d_un.d_val; |
// kputint(0x10); |
register unsigned tag = dynamic[i].d_tag; |
/* |
* Note that switches only work because we are using |
* -fno-jump-tables. |
*/ |
switch (tag) { |
case DT_PLTRELSZ: jmp_rel_entries = dval/8; break; |
case DT_JMPREL: jmp_rel_table = dptr; break; |
case DT_PLTGOT: |
/* PLT address */ |
plt = dptr; break; |
case DT_SYMTAB: sym_table = dptr; break; |
case DT_RELA: rel_table = dptr; break; |
case DT_RELASZ: rel_entries = dval / 8; break; |
default: break; |
} |
// kputint(0x20); |
++i; |
} |
kputint(1); |
kputint((unsigned)sym_table); |
kputint((unsigned)rel_table); |
kputint((unsigned)rel_entries); |
/* Now relocate all our dynsyms */ |
kputint(-1); |
// PLT entries start here. However, each occupies 2 words |
_plt_ent = plt + 18; |
// By definition of the ppc ABI, there's 1:1 correspondence |
// between JMPREL entries and PLT entries |
unsigned plt_n = jmp_rel_entries; |
uint32_t *_plt_table; |
uint32_t *_plt_call; |
uint32_t *_plt_resolve; |
_plt_resolve = plt; |
_plt_call = plt + 6; |
_plt_table = plt + 18 + plt_n; |
for (i=0; i<rel_entries; i++) { |
// kputint(i); |
r_offset = rel_table[i].r_offset; |
r_info = rel_table[i].r_info; |
r_ptr = (uint32_t *)(r_offset + bias); |
a = rel_table[i].r_addend; |
// kputint(-2); |
// kputint(a); |
// kputint(ELF32_R_TYPE(r_info)); |
// kputint(ELF32_R_SYM(r_info)); |
rel_type = ELF32_R_TYPE(r_info); |
// kputint(rel_type); |
// kputint(r_offset); |
switch (rel_type) { |
case R_PPC_JMP_SLOT: |
kputint(0xa); |
sym_idx = ELF32_R_SYM(r_info); |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_idx); |
kputint(sym_addr); |
// r_ptr should point to a plt entry... |
uint32_t pidx = (r_ptr - _plt_ent) / 2; |
if (pidx >= plt_n) { |
kputint(0xee00ee0ee00); |
//while(1); |
} |
_plt_table[pidx] = sym_addr; |
// kputint(pidx); |
// plt[18] = _b(sym_addr, plt + 18); |
// kputint(&plt[18]); |
// kputint(plt[18]); |
// while(1); |
// while(1); |
//*r_ptr = sym_addr; |
break; |
case R_PPC_ADDR32: |
kputint(0xb); |
sym_idx = ELF32_R_SYM(r_info); |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_idx); |
kputint(sym_addr); |
*r_ptr = a + sym_addr; |
break; |
case R_PPC_RELATIVE: |
// kputint(0xc); |
*r_ptr = a + bias; |
break; |
case R_PPC_REL24: |
kputint(0xd); |
sym_idx = ELF32_R_SYM(r_info); |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_addr); |
res = (sym_addr - (uint32_t)r_ptr + a) >> 2; |
kputint(res); |
if (res & 0xff000000) { |
/* out of range?? */ |
kputint(0xeeeeeeee); |
//while(1); |
} |
*r_ptr = (*r_ptr & ~0x00ffffff) | (res & 0x00ffffff); |
kputint(0x1d); |
break; |
} |
} |
kputint(-3); |
if (plt != 0) { |
/* .PLTcall: */ |
plt[6] = _ldis(11, __HA(_plt_table)); // ldis r11, .PLTtable@ha |
plt[7] = _lwz(11, __L(_plt_table), 11); // lwz r11, .PLTtable@l(r11) |
plt[8] = _mtctr(11); // mtctr r11 |
plt[9] = _bctr(); |
/* .PLTi, i = 0..N-1 */ |
kputint(-4); |
for (i = 0; i < plt_n; ++i) { |
//_plt_table[i] == function address; |
plt[18+i] = _b(_plt_call, &plt[18+i]); // b .PLTcall |
} |
kputint(-5); |
/* This will come in handy */ |
// runtime_env.rtld_dynamic = dynamic; |
// runtime_env.rtld.bias = bias; |
kputint(_plt_table[0]); |
} |
// volatile int ff=1; |
// while(ff); |
test_func(); |
kputint(0x42); |
// while(1); |
/* Init libc and run rtld main */ |
kputint(0x22); |
__main(); |
kputint(33); |
__io_init(); |
kputint(-1); |
kputint(0x52); |
printf("Hello, world! (from ppc rtld)\n"); |
kputint(0x62); |
while(1); |
// kputint(34); |
// _rtld_main(); |
// kputint(35); |
// __exit(); |
// kputint(36); |
} |
/** @} |
*/ |
/branches/dynload/uspace/lib/rtld/arch/ia32/Makefile.inc |
---|
27,9 → 27,9 |
# |
CFLAGS += -D__32_BITS__ |
LFLAGS += -e __bootstrap |
ARCH_SOURCES := \ |
arch/$(ARCH)/src/entry.s \ |
arch/$(ARCH)/src/bootstrap.c \ |
arch/$(ARCH)/src/runtime.c \ |
arch/$(ARCH)/src/reloc.c |