gem5/base/loader/elf_object.cc

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/*
Many files: Update copyright dates and author list SConscript: arch/alpha/alpha_linux_process.cc: arch/alpha/alpha_linux_process.hh: arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/alpha_tru64_process.cc: arch/alpha/alpha_tru64_process.hh: arch/alpha/aout_machdep.h: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/faults.cc: arch/alpha/faults.hh: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/osfpal.hh: arch/alpha/pseudo_inst.cc: arch/alpha/pseudo_inst.hh: arch/alpha/vptr.hh: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/bitfield.hh: base/callback.hh: base/circlebuf.cc: base/circlebuf.hh: base/cprintf.cc: base/cprintf.hh: base/cprintf_formats.hh: base/crc.hh: base/date.cc: base/dbl_list.hh: base/endian.hh: base/fast_alloc.cc: base/fast_alloc.hh: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/intmath.hh: base/match.cc: base/match.hh: base/misc.cc: base/misc.hh: base/mod_num.hh: base/mysql.cc: base/mysql.hh: base/output.cc: base/output.hh: base/pollevent.cc: base/pollevent.hh: base/predictor.hh: base/random.cc: base/random.hh: base/range.cc: base/range.hh: base/refcnt.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/socket.hh: base/statistics.cc: base/statistics.hh: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/compression/null_compression.hh: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/stats/events.cc: base/stats/events.hh: base/stats/flags.hh: base/stats/mysql.cc: base/stats/mysql.hh: base/stats/mysql_run.hh: base/stats/output.hh: base/stats/statdb.cc: base/stats/statdb.hh: base/stats/text.cc: base/stats/text.hh: base/stats/types.hh: base/stats/visit.cc: base/stats/visit.hh: base/str.cc: base/str.hh: base/time.cc: base/time.hh: base/timebuf.hh: base/trace.cc: base/trace.hh: base/userinfo.cc: base/userinfo.hh: build/SConstruct: cpu/base.cc: cpu/base.hh: cpu/base_dyn_inst.cc: cpu/base_dyn_inst.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/inst_seq.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/pc_event.cc: cpu/pc_event.hh: cpu/smt.hh: cpu/static_inst.cc: cpu/static_inst.hh: cpu/memtest/memtest.hh: cpu/o3/sat_counter.cc: cpu/o3/sat_counter.hh: cpu/ozone/cpu.hh: cpu/simple/cpu.cc: cpu/simple/cpu.hh: cpu/trace/opt_cpu.cc: cpu/trace/opt_cpu.hh: cpu/trace/reader/ibm_reader.cc: cpu/trace/reader/ibm_reader.hh: cpu/trace/reader/itx_reader.cc: cpu/trace/reader/itx_reader.hh: cpu/trace/reader/m5_reader.cc: cpu/trace/reader/m5_reader.hh: cpu/trace/reader/mem_trace_reader.cc: cpu/trace/reader/mem_trace_reader.hh: cpu/trace/trace_cpu.cc: cpu/trace/trace_cpu.hh: dev/alpha_access.h: dev/alpha_console.cc: dev/alpha_console.hh: dev/baddev.cc: dev/baddev.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.cc: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/ide_ctrl.cc: dev/ide_ctrl.hh: dev/ide_disk.cc: dev/ide_disk.hh: dev/io_device.cc: dev/io_device.hh: dev/ns_gige.cc: dev/ns_gige.hh: dev/ns_gige_reg.h: dev/pciconfigall.cc: dev/pciconfigall.hh: dev/pcidev.cc: dev/pcidev.hh: dev/pcireg.h: dev/pktfifo.cc: dev/pktfifo.hh: dev/platform.cc: dev/platform.hh: dev/simconsole.cc: dev/simconsole.hh: dev/simple_disk.cc: dev/simple_disk.hh: dev/sinic.cc: dev/sinic.hh: dev/sinicreg.hh: dev/tsunami.cc: dev/tsunami.hh: dev/tsunami_cchip.cc: dev/tsunami_cchip.hh: dev/tsunami_io.cc: dev/tsunami_io.hh: dev/tsunami_pchip.cc: dev/tsunami_pchip.hh: dev/tsunamireg.h: dev/uart.cc: dev/uart.hh: dev/uart8250.cc: dev/uart8250.hh: docs/stl.hh: encumbered/cpu/full/op_class.hh: kern/kernel_stats.cc: kern/kernel_stats.hh: kern/linux/linux.hh: kern/linux/linux_syscalls.cc: kern/linux/linux_syscalls.hh: kern/linux/linux_system.cc: kern/linux/linux_system.hh: kern/linux/linux_threadinfo.hh: kern/linux/printk.cc: kern/linux/printk.hh: kern/system_events.cc: kern/system_events.hh: kern/tru64/dump_mbuf.cc: kern/tru64/dump_mbuf.hh: kern/tru64/mbuf.hh: kern/tru64/printf.cc: kern/tru64/printf.hh: kern/tru64/tru64.hh: kern/tru64/tru64_events.cc: kern/tru64/tru64_events.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: kern/tru64/tru64_system.cc: kern/tru64/tru64_system.hh: python/SConscript: python/m5/__init__.py: python/m5/config.py: python/m5/convert.py: python/m5/multidict.py: python/m5/smartdict.py: sim/async.hh: sim/builder.cc: sim/builder.hh: sim/debug.cc: sim/debug.hh: sim/eventq.cc: sim/eventq.hh: sim/host.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/process.cc: sim/process.hh: sim/root.cc: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_exit.hh: sim/sim_object.cc: sim/sim_object.hh: sim/startup.cc: sim/startup.hh: sim/stat_control.cc: sim/stat_control.hh: sim/stats.hh: sim/syscall_emul.cc: sim/syscall_emul.hh: sim/system.cc: sim/system.hh: test/bitvectest.cc: test/circletest.cc: test/cprintftest.cc: test/genini.py: test/initest.cc: test/lru_test.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/sized_test.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/ccdrv/devtime.c: util/m5/m5.c: util/oprofile-top.py: util/rundiff: util/m5/m5op.h: util/m5/m5op.s: util/stats/db.py: util/stats/dbinit.py: util/stats/display.py: util/stats/info.py: util/stats/print.py: util/stats/stats.py: util/tap/tap.cc: Update copyright dates and author list --HG-- extra : convert_revision : 0faba08fc0fc0146f1efb7f61e4b043c020ff9e4
2005-06-05 11:16:00 +02:00
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER OR CONTRIBUTORS 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 <string>
// Because of the -Wundef flag we have to do this
#define __LIBELF_INTERNAL__ 0
// counterintuitive, but the flag below causes libelf to define
// 64-bit elf types that apparently didn't exist in some older
// versions of Linux. They seem to be there in 2.4.x, so don't
// set this now (it causes things to break on 64-bit platforms).
#define __LIBELF64_LINUX 0
#define __LIBELF_NEED_LINK_H 0
#define __LIBELF_SYMBOL_VERSIONS 0
#include "libelf/libelf.h"
#include "libelf/gelf.h"
Make include paths explicit and update makefile accordingly. arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/fake_syscall.cc: arch/alpha/faults.cc: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/circlebuf.cc: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/cprintf.cc: base/cprintf.hh: base/fast_alloc.cc: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/exec_aout.h: base/loader/exec_ecoff.h: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/misc.cc: base/misc.hh: base/pollevent.cc: base/pollevent.hh: base/random.cc: base/random.hh: base/range.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/statistics.cc: base/statistics.hh: base/str.cc: base/trace.cc: base/trace.hh: cpu/base_cpu.cc: cpu/base_cpu.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/memtest/memtest.hh: cpu/pc_event.cc: cpu/pc_event.hh: cpu/simple_cpu/simple_cpu.cc: cpu/simple_cpu/simple_cpu.hh: cpu/static_inst.cc: cpu/static_inst.hh: dev/alpha_console.cc: dev/alpha_console.hh: dev/console.cc: dev/console.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/simple_disk.cc: dev/simple_disk.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: sim/debug.cc: sim/eventq.cc: sim/eventq.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/prog.cc: sim/prog.hh: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_object.cc: sim/sim_object.hh: sim/sim_time.cc: sim/system.cc: sim/system.hh: sim/universe.cc: test/circletest.cc: test/cprintftest.cc: test/initest.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/tap/tap.cc: Make include paths explicit. --HG-- extra : convert_revision : 941cbdc591fd4d3d1d9f095cd58fc23dd2d73840
2003-10-10 20:09:00 +02:00
#include "base/loader/elf_object.hh"
#include "base/misc.hh"
Make include paths explicit and update makefile accordingly. arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/fake_syscall.cc: arch/alpha/faults.cc: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/circlebuf.cc: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/cprintf.cc: base/cprintf.hh: base/fast_alloc.cc: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/exec_aout.h: base/loader/exec_ecoff.h: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/misc.cc: base/misc.hh: base/pollevent.cc: base/pollevent.hh: base/random.cc: base/random.hh: base/range.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/statistics.cc: base/statistics.hh: base/str.cc: base/trace.cc: base/trace.hh: cpu/base_cpu.cc: cpu/base_cpu.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/memtest/memtest.hh: cpu/pc_event.cc: cpu/pc_event.hh: cpu/simple_cpu/simple_cpu.cc: cpu/simple_cpu/simple_cpu.hh: cpu/static_inst.cc: cpu/static_inst.hh: dev/alpha_console.cc: dev/alpha_console.hh: dev/console.cc: dev/console.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/simple_disk.cc: dev/simple_disk.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: sim/debug.cc: sim/eventq.cc: sim/eventq.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/prog.cc: sim/prog.hh: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_object.cc: sim/sim_object.hh: sim/sim_time.cc: sim/system.cc: sim/system.hh: sim/universe.cc: test/circletest.cc: test/cprintftest.cc: test/initest.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/tap/tap.cc: Make include paths explicit. --HG-- extra : convert_revision : 941cbdc591fd4d3d1d9f095cd58fc23dd2d73840
2003-10-10 20:09:00 +02:00
#include "base/loader/symtab.hh"
Make include paths explicit and update makefile accordingly. arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/fake_syscall.cc: arch/alpha/faults.cc: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/circlebuf.cc: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/cprintf.cc: base/cprintf.hh: base/fast_alloc.cc: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/exec_aout.h: base/loader/exec_ecoff.h: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/misc.cc: base/misc.hh: base/pollevent.cc: base/pollevent.hh: base/random.cc: base/random.hh: base/range.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/statistics.cc: base/statistics.hh: base/str.cc: base/trace.cc: base/trace.hh: cpu/base_cpu.cc: cpu/base_cpu.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/memtest/memtest.hh: cpu/pc_event.cc: cpu/pc_event.hh: cpu/simple_cpu/simple_cpu.cc: cpu/simple_cpu/simple_cpu.hh: cpu/static_inst.cc: cpu/static_inst.hh: dev/alpha_console.cc: dev/alpha_console.hh: dev/console.cc: dev/console.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/simple_disk.cc: dev/simple_disk.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: sim/debug.cc: sim/eventq.cc: sim/eventq.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/prog.cc: sim/prog.hh: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_object.cc: sim/sim_object.hh: sim/sim_time.cc: sim/system.cc: sim/system.hh: sim/universe.cc: test/circletest.cc: test/cprintftest.cc: test/initest.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/tap/tap.cc: Make include paths explicit. --HG-- extra : convert_revision : 941cbdc591fd4d3d1d9f095cd58fc23dd2d73840
2003-10-10 20:09:00 +02:00
#include "base/trace.hh" // for DPRINTF
#include "sim/byteswap.hh"
using namespace std;
ObjectFile *
ElfObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
{
Elf *elf;
GElf_Ehdr ehdr;
Arch arch = UnknownArch;
OpSys opSys = UnknownOpSys;
// check that header matches library version
if (elf_version(EV_CURRENT) == EV_NONE)
panic("wrong elf version number!");
// get a pointer to elf structure
elf = elf_memory((char*)data,len);
// will only fail if fd is invalid
assert(elf != NULL);
// Check that we actually have a elf file
if (gelf_getehdr(elf, &ehdr) ==0) {
DPRINTFR(Loader, "Not ELF\n");
elf_end(elf);
return NULL;
} else {
//Detect the architecture
//Versioning issues in libelf need to be resolved to get the correct
//SPARC constants.
//If MIPS supports 32 bit executables, this may need to be changed.
//Also, there are other MIPS constants which may be used, like
//EM_MIPS_RS3_LE and EM_MIPS_X
//Since we don't know how to check for alpha right now, we'll
//just assume if it wasn't something else and it's 64 bit, that's
//what it must be.
if (ehdr.e_machine == EM_SPARC64 ||
ehdr.e_machine == EM_SPARC ||
ehdr.e_machine == EM_SPARCV9) {
arch = ObjectFile::SPARC;
} else if (ehdr.e_machine == EM_MIPS
&& ehdr.e_ident[EI_CLASS] == ELFCLASS32) {
arch = ObjectFile::Mips;
} else if (ehdr.e_ident[EI_CLASS] == ELFCLASS64) {
arch = ObjectFile::Alpha;
} else {
arch = ObjectFile::UnknownArch;
}
//Detect the operating system
switch (ehdr.e_ident[EI_OSABI])
{
case ELFOSABI_LINUX:
opSys = ObjectFile::Linux;
break;
case ELFOSABI_SOLARIS:
opSys = ObjectFile::Solaris;
break;
case ELFOSABI_TRU64:
opSys = ObjectFile::Tru64;
break;
default:
opSys = ObjectFile::UnknownOpSys;
}
//take a look at the .note.ABI section
//It can let us know what's what.
if (opSys == ObjectFile::UnknownOpSys)
{
Elf_Scn *section;
GElf_Shdr shdr;
Elf_Data *data;
uint32_t osAbi;;
int secIdx = 1;
// Get the first section
section = elf_getscn(elf, secIdx);
// While there are no more sections
while (section != NULL) {
gelf_getshdr(section, &shdr);
if (shdr.sh_type == SHT_NOTE && !strcmp(".note.ABI-tag",
elf_strptr(elf, ehdr.e_shstrndx, shdr.sh_name))) {
// we have found a ABI note section
// Check the 5th 32bit word for OS 0 == linux, 1 == hurd,
// 2 == solaris, 3 == freebsd
data = elf_rawdata(section, NULL);
assert(data->d_buf);
if(ehdr.e_ident[EI_DATA] == ELFDATA2LSB)
osAbi = htole(((uint32_t*)data->d_buf)[4]);
else
osAbi = htobe(((uint32_t*)data->d_buf)[4]);
switch(osAbi) {
case 0:
opSys = ObjectFile::Linux;
break;
case 2:
opSys = ObjectFile::Solaris;
break;
}
} // if section found
section = elf_getscn(elf, ++secIdx);
} // while sections
}
elf_end(elf);
return new ElfObject(fname, fd, len, data, arch, opSys);
}
}
ElfObject::ElfObject(const string &_filename, int _fd,
size_t _len, uint8_t *_data,
Restructuring of LiveProcess etc. to support multiple emulated OS syscall interfaces, and specific support for Alpha Linux. Split syscall emulation functions into several groups, based on whether they depend on the specific OS and/or architecture (and all combinations of above), including the use of template functions to support syscalls with slightly different constants or interface structs. arch/alpha/alpha_tru64_process.cc: Incorporate full Tru64 object definition here, including structure and constant definitions. This way we can wrap all of the functions inside the object, and not worry about namespace conflicts because no one outside this file will ever see it. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.cc: base/loader/object_file.hh: Add enums to ObjectFile to indicate the object's architecture and operating system. cpu/exec_context.cc: prog.hh is now process.hh cpu/exec_context.hh: prog.hh is now process.hh move architecture-specific syscall arg accessors into ExecContext cpu/simple_cpu/simple_cpu.cc: No need to include prog.hh (which has been renamed) sim/process.cc: sim/process.hh: LiveProcess is now effectively an abstract base class. New LiveProcess::create() function takes an object file and dynamically picks the appropriate subclass of LiveProcess to handle the syscall interface that file expects (currently Tru64 or Linux). --HG-- rename : arch/alpha/fake_syscall.cc => arch/alpha/alpha_tru64_process.cc rename : sim/prog.cc => sim/process.cc rename : sim/prog.hh => sim/process.hh extra : convert_revision : 4a03ca7d94a34177cb672931f8aae83a6bad179a
2003-12-02 04:34:38 +01:00
Arch _arch, OpSys _opSys)
: ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
{
Elf *elf;
GElf_Ehdr ehdr;
// check that header matches library version
if (elf_version(EV_CURRENT) == EV_NONE)
panic("wrong elf version number!");
// get a pointer to elf structure
elf = elf_memory((char*)fileData,len);
// will only fail if fd is invalid
assert(elf != NULL);
// Check that we actually have a elf file
if (gelf_getehdr(elf, &ehdr) ==0) {
panic("Not ELF, shouldn't be here");
}
entry = ehdr.e_entry;
// initialize segment sizes to 0 in case they're not present
text.size = data.size = bss.size = 0;
for (int i = 0; i < ehdr.e_phnum; ++i) {
GElf_Phdr phdr;
if (gelf_getphdr(elf, i, &phdr) == 0) {
panic("gelf_getphdr failed for section %d", i);
}
// for now we don't care about non-loadable segments
if (!(phdr.p_type & PT_LOAD))
continue;
// the headers don't explicitly distinguish text from data,
// but empirically the text segment comes first.
if (text.size == 0) { // haven't seen text segment yet
text.baseAddr = phdr.p_vaddr;
text.size = phdr.p_filesz;
Simple program runs with sendAtomic! Ignoring returned latency for now. Refactored loadSections in ObjectFile hierarchy. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.hh: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. base/loader/object_file.cc: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. Also explicitly load BSS now since we need to allocate the translations for it in syscall emulation. cpu/base.hh: Don't need memPort (just pass port in to ExecContext constructor). cpu/exec_context.cc: cpu/exec_context.hh: mem/port.cc: mem/translating_port.cc: mem/translating_port.hh: Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.cc: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Several more minor bug fixes. Works for simple program with SIMPLE_CPU_MEM_IMMEDIATE model now. Probably have memory leaks with SIMPLE_CPU_MEM_TIMING (if it works at all). Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.hh: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Pass syscall emulation Port into constructor instead of getting it from BaseCPU. mem/physical.cc: Set packet result field. --HG-- extra : convert_revision : 359d0ebe4b4665867f4e26e7394ec0f1d17cfc26
2006-03-02 16:31:48 +01:00
text.fileImage = fileData + phdr.p_offset;
// if there's any padding at the end that's not in the
// file, call it the bss. This happens in the "text"
// segment if there's only one loadable segment (as for
// kernel images).
bss.size = phdr.p_memsz - phdr.p_filesz;
bss.baseAddr = phdr.p_vaddr + phdr.p_filesz;
Simple program runs with sendAtomic! Ignoring returned latency for now. Refactored loadSections in ObjectFile hierarchy. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.hh: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. base/loader/object_file.cc: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. Also explicitly load BSS now since we need to allocate the translations for it in syscall emulation. cpu/base.hh: Don't need memPort (just pass port in to ExecContext constructor). cpu/exec_context.cc: cpu/exec_context.hh: mem/port.cc: mem/translating_port.cc: mem/translating_port.hh: Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.cc: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Several more minor bug fixes. Works for simple program with SIMPLE_CPU_MEM_IMMEDIATE model now. Probably have memory leaks with SIMPLE_CPU_MEM_TIMING (if it works at all). Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.hh: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Pass syscall emulation Port into constructor instead of getting it from BaseCPU. mem/physical.cc: Set packet result field. --HG-- extra : convert_revision : 359d0ebe4b4665867f4e26e7394ec0f1d17cfc26
2006-03-02 16:31:48 +01:00
bss.fileImage = NULL;
} else if (data.size == 0) { // have text, this must be data
data.baseAddr = phdr.p_vaddr;
data.size = phdr.p_filesz;
Simple program runs with sendAtomic! Ignoring returned latency for now. Refactored loadSections in ObjectFile hierarchy. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.hh: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. base/loader/object_file.cc: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. Also explicitly load BSS now since we need to allocate the translations for it in syscall emulation. cpu/base.hh: Don't need memPort (just pass port in to ExecContext constructor). cpu/exec_context.cc: cpu/exec_context.hh: mem/port.cc: mem/translating_port.cc: mem/translating_port.hh: Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.cc: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Several more minor bug fixes. Works for simple program with SIMPLE_CPU_MEM_IMMEDIATE model now. Probably have memory leaks with SIMPLE_CPU_MEM_TIMING (if it works at all). Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.hh: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Pass syscall emulation Port into constructor instead of getting it from BaseCPU. mem/physical.cc: Set packet result field. --HG-- extra : convert_revision : 359d0ebe4b4665867f4e26e7394ec0f1d17cfc26
2006-03-02 16:31:48 +01:00
data.fileImage = fileData + phdr.p_offset;
// if there's any padding at the end that's not in the
// file, call it the bss. Warn if this happens for both
// the text & data segments (should only have one bss).
if (phdr.p_memsz - phdr.p_filesz > 0 && bss.size != 0) {
warn("Two implied bss segments in file!\n");
}
bss.size = phdr.p_memsz - phdr.p_filesz;
bss.baseAddr = phdr.p_vaddr + phdr.p_filesz;
Simple program runs with sendAtomic! Ignoring returned latency for now. Refactored loadSections in ObjectFile hierarchy. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.hh: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. base/loader/object_file.cc: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. Also explicitly load BSS now since we need to allocate the translations for it in syscall emulation. cpu/base.hh: Don't need memPort (just pass port in to ExecContext constructor). cpu/exec_context.cc: cpu/exec_context.hh: mem/port.cc: mem/translating_port.cc: mem/translating_port.hh: Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.cc: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Several more minor bug fixes. Works for simple program with SIMPLE_CPU_MEM_IMMEDIATE model now. Probably have memory leaks with SIMPLE_CPU_MEM_TIMING (if it works at all). Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.hh: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Pass syscall emulation Port into constructor instead of getting it from BaseCPU. mem/physical.cc: Set packet result field. --HG-- extra : convert_revision : 359d0ebe4b4665867f4e26e7394ec0f1d17cfc26
2006-03-02 16:31:48 +01:00
bss.fileImage = NULL;
} else {
warn("More than two loadable segments in ELF object.");
warn("Ignoring segment @ 0x%x length 0x%x.",
phdr.p_vaddr, phdr.p_filesz);
}
}
// should have found at least one loadable segment
assert(text.size != 0);
DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
text.baseAddr, text.size, data.baseAddr, data.size,
bss.baseAddr, bss.size);
elf_end(elf);
// We will actually read the sections when we need to load them
}
bool
ElfObject::loadSomeSymbols(SymbolTable *symtab, int binding)
{
Elf *elf;
int sec_idx = 1; // there is a 0 but it is nothing, go figure
Elf_Scn *section;
GElf_Shdr shdr;
Elf_Data *data;
int count, ii;
bool found = false;
GElf_Sym sym;
if (!symtab)
return false;
// check that header matches library version
if (elf_version(EV_CURRENT) == EV_NONE)
panic("wrong elf version number!");
// get a pointer to elf structure
elf = elf_memory((char*)fileData,len);
assert(elf != NULL);
// Get the first section
section = elf_getscn(elf, sec_idx);
// While there are no more sections
while (section != NULL) {
gelf_getshdr(section, &shdr);
if (shdr.sh_type == SHT_SYMTAB) {
found = true;
data = elf_getdata(section, NULL);
count = shdr.sh_size / shdr.sh_entsize;
DPRINTF(Loader, "Found Symbol Table, %d symbols present\n", count);
// loop through all the symbols, only loading global ones
for (ii = 0; ii < count; ++ii) {
gelf_getsym(data, ii, &sym);
if (GELF_ST_BIND(sym.st_info) == binding) {
symtab->insert(sym.st_value,
elf_strptr(elf, shdr.sh_link, sym.st_name));
}
}
}
++sec_idx;
section = elf_getscn(elf, sec_idx);
}
elf_end(elf);
return found;
}
bool
ElfObject::loadGlobalSymbols(SymbolTable *symtab)
{
return loadSomeSymbols(symtab, STB_GLOBAL);
}
bool
ElfObject::loadLocalSymbols(SymbolTable *symtab)
{
return loadSomeSymbols(symtab, STB_LOCAL);
}