/branches/dynload/uspace/lib/rtld/rtld.c |
---|
0,0 → 1,74 |
/* |
* 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 |
*/ |
static void kputint(unsigned i) |
{ |
unsigned dummy; |
asm volatile ( |
"movl $30, %%eax;" |
"int $0x30" |
: "=d" (dummy) /* output - %edx clobbered */ |
: "d" (i) /* input */ |
: "%eax","%ecx" /* all scratch registers clobbered */ |
); |
} |
void test_func(void); |
void test_func(void) |
{ |
asm ( |
"movl $253, %%eax;" |
"int $0x30" |
: /* output */ |
: /* input */ |
: "%eax","%ecx","%edx" /* all scratch registers clobbered */ |
); |
} |
void _rtld_main(void) |
{ |
kputint(-1); |
kputint(32); |
test_func(); |
kputint(46); |
} |
/** @} |
*/ |
/branches/dynload/uspace/lib/rtld/Makefile |
---|
0,0 → 1,99 |
# |
# Copyright (c) 2005 Martin Decky |
# 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. |
# |
include ../../../version |
include ../../Makefile.config |
## Setup toolchain |
# |
LIBC_PREFIX = ../../lib/libc |
SOFTINT_PREFIX = ../../lib/softint |
include $(LIBC_PREFIX)/Makefile.toolchain |
include arch/$(ARCH)/Makefile.inc |
CFLAGS += -I../../srv/kbd/include -fPIC -O0 -ggdb |
LFLAGS = -shared |
#LIBS = $(LIBC_PREFIX)/libc.a |
LIBS = |
DEFS += -DRELEASE=\"$(RELEASE)\" |
ifdef REVISION |
DEFS += "-DREVISION=\"$(REVISION)\"" |
endif |
ifdef TIMESTAMP |
DEFS += "-DTIMESTAMP=\"$(TIMESTAMP)\"" |
endif |
## Sources |
# |
OUTPUT = rtld.so |
GENERIC_SOURCES = \ |
rtld.c |
GENERIC_OBJECTS := $(addsuffix .o,$(basename $(GENERIC_SOURCES))) |
ARCH_OBJECTS := $(addsuffix .o,$(basename $(ARCH_SOURCES))) |
.PHONY: all clean depend disasm sections |
all: $(OUTPUT) disasm sections |
-include Makefile.depend |
clean: |
-rm -f $(OUTPUT) $(OUTPUT).map $(OUTPUT).disasm $(OUTPUT).sections Makefile.depend *.o arch/$(ARCH)/_link.ld |
find arch/$(ARCH)/ -name '*.o' -follow -exec rm \{\} \; |
depend: |
$(CC) $(DEFS) $(CFLAGS) -M $(ARCH_SOURCES) $(GENERIC_SOURCES)> Makefile.depend |
$(OUTPUT): $(ARCH_OBJECTS) $(GENERIC_OBJECTS) $(LIBS) arch/$(ARCH)/_link.ld |
# $(LD) -T $(LIBC_PREFIX)/arch/$(ARCH)/_link.ld $(OBJECTS) $(LIBS) $(LFLAGS) -o $@ -Map $(OUTPUT).map |
$(LD) -T arch/$(ARCH)/_link.ld $(ARCH_OBJECTS) $(GENERIC_OBJECTS) $(LIBS) $(LFLAGS) -o $@ -Map $(OUTPUT).map |
disasm: |
# $(OBJDUMP) -h -r -R -t -T -D -z -s $(OUTPUT) >$(OUTPUT).disasm |
$(OBJDUMP) -d -S -s $(OUTPUT) >$(OUTPUT).disasm |
sections: |
$(OBJDUMP) -h $(OUTPUT) >$(OUTPUT).sections |
arch/$(ARCH)/_link.ld: arch/$(ARCH)/_link.ld.in |
$(CC) $(DEFS) $(CFLAGS) -DLIBC_PREFIX=$(LIBC_PREFIX) -E -x c $< | grep -v "^\#" > $@ |
%.o: %.S |
$(CC) $(DEFS) $(AFLAGS) $(CFLAGS) -D__ASM__ -c $< -o $@ |
%.o: %.s |
$(AS) $(AFLAGS) $< -o $@ |
%.o: %.c |
$(CC) $(DEFS) $(CFLAGS) -c $< -o $@ |
/branches/dynload/uspace/lib/rtld/arch/ia32/_link.ld.in |
---|
0,0 → 1,67 |
ENTRY(__entry) |
PHDRS { |
text PT_LOAD FLAGS(5); |
data PT_LOAD FLAGS(6); |
} |
SECTIONS { |
. = 0x1000; |
.init ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.init); |
} :text |
.text : { |
*(.text); |
*(.text.*); |
*(.rodata*); |
*(.rel.dyn); |
} :text |
.plt ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.plt); |
} :text |
.dynamic ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.dynamic); |
} :text |
.dynsym ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.dynsym); |
} :text |
.dynstr ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.dynstr); |
} :text |
.data ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.data); |
} :data |
.tdata : { |
_tdata_start = .; |
*(.tdata); |
_tdata_end = .; |
} :data |
.tbss : { |
_tbss_start = .; |
*(.tbss); |
_tbss_end = .; |
} :data |
_tls_alignment = MAX(ALIGNOF(.tdata), ALIGNOF(.tbss)); |
.bss : { |
*(COMMON); |
*(.bss); |
} :data |
.got ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.got); |
} :data |
.data.rel ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.data.rel); |
} :data |
.got.plt ALIGN(0x1000) : SUBALIGN(0x1000) { |
*(.got.plt); |
} :data |
. = ALIGN(0x1000); |
_heap = .; |
} |
/branches/dynload/uspace/lib/rtld/arch/ia32/entry.s |
---|
0,0 → 1,42 |
# |
# Copyright (c) 2005 Martin Decky |
# 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. |
# |
.section .text |
.globl __bootstrap |
.hidden __bootstrap |
.type __entry, @function |
__entry: |
mov %ss, %ax |
mov %ax, %ds |
mov %ax, %es |
mov %ax, %fs |
call __bootstrap |
/branches/dynload/uspace/lib/rtld/arch/ia32/Makefile.inc |
---|
0,0 → 1,31 |
# |
# 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. |
# |
ARCH_SOURCES := \ |
arch/$(ARCH)/entry.s \ |
arch/$(ARCH)/bootstrap.c |
/branches/dynload/uspace/lib/rtld/arch/ia32/bootstrap.c |
---|
0,0 → 1,195 |
/* |
* 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 |
*/ |
void _rtld_main(void); |
#define ELF32_R_SYM(i) ((i)>>8) |
#define ELF32_R_TYPE(i) ((unsigned char)(i)) |
typedef struct { |
int d_tag; |
union { |
unsigned d_val; |
unsigned *d_ptr; |
} d_un; |
} elf32_dyn; |
typedef struct { |
unsigned r_offset; |
unsigned r_info; |
} elf32_rel; |
typedef struct { |
unsigned st_name; |
unsigned st_value; |
unsigned st_size; |
unsigned char st_info; |
unsigned char st_other; |
unsigned short st_shndx; |
} elf32_sym; |
static void kputint(unsigned i) |
{ |
unsigned dummy; |
asm volatile ( |
"movl $30, %%eax;" |
"int $0x30" |
: "=d" (dummy) /* output - %edx clobbered */ |
: "d" (i) /* input */ |
: "%eax","%ecx" /* all scratch registers clobbered */ |
); |
} |
void __bootstrap(void) |
{ |
unsigned bias; |
unsigned *got; |
elf32_dyn *dynamic; |
unsigned *dptr; |
unsigned dval; |
int i; |
unsigned rel_entries; |
unsigned r_offset; |
unsigned r_info; |
unsigned rel_type; |
unsigned sym_idx; |
unsigned sym_addr; |
elf32_sym *sym_table; |
elf32_rel *rel_table; |
asm volatile ( |
"movl $30, %eax;" |
"int $0x30" |
); |
/* Copied from libc/arch/ia32/entry.s */ |
/*asm volatile ( |
"mov %ss, %ax;" |
"mov %ax, %ds;" |
"mov %ax, %es;" |
"mov %ax, %fs;" |
);*/ |
asm volatile ( |
/* Calculate the bias into %0 */ |
" call .L0;" |
".L0: pop %0;" |
" subl $.L0, %0;" |
/* Calculate run-time address of _DYNAMIC into %1 */ |
" movl $_DYNAMIC, %1;" /* Again, at link time 0-based VMA gets in */ |
" addl %0, %1;" /* Add bias to compute run-time address */ |
: "=r" (bias), "=r" (dynamic) |
); |
kputint(bias); |
kputint((unsigned)dynamic); |
/* parse DYNAMIC */ |
got = 0; |
sym_table = 0; |
rel_table = 0; |
rel_entries = 0; |
i = 0; |
while (dynamic[i].d_tag != 0) { |
dptr = (unsigned *)(dynamic[i].d_un.d_val + bias); |
dval = dynamic[i].d_un.d_val; |
switch (dynamic[i].d_tag) { |
case 3 /* DT_PLTGOT */: |
/* GOT address */ |
got = dptr; break; |
case 6 /* DT_SYMTAB */ : sym_table = dptr; break; |
case 17 /* DT_REL */ : rel_table = dptr; break; |
case 18 /* DT_RELSZ */ : rel_entries = dval / 8; break; |
default: break; |
} |
++i; |
} |
kputint(1); |
kputint((unsigned)sym_table); |
kputint((unsigned)rel_table); |
kputint((unsigned)rel_entries); |
/* Now relocate all our dynsyms */ |
kputint(-1); |
for (i=0; i<rel_entries; i++) { |
kputint(i); |
r_offset = rel_table[i].r_offset; |
r_info = rel_table[i].r_info; |
rel_type = ELF32_R_TYPE(r_info); |
kputint(rel_type); |
kputint(r_offset); |
if (rel_type == 7 /* R_386_JUMP_SLOT */) { |
kputint(16); |
sym_idx = ELF32_R_SYM(r_info); |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_idx); |
kputint(sym_addr); |
*(unsigned *)(r_offset+bias) = sym_addr; |
} |
} |
kputint(-1); |
kputint(32); |
_rtld_main(); |
asm ( |
"movl $250, %%eax;" |
"int $0x30" |
: /* output */ |
: /* input */ |
: "%eax","%ecx","%edx" /* all scratch registers clobbered */ |
); |
} |
/** @} |
*/ |