ed52d5a211
Instead of holding SPEC-variable dependent files and directories inline within the repository structure, move them into 'spec' subdirectories at the corresponding levels, e.g.: repos/base/include/spec repos/base/mk/spec repos/base/lib/mk/spec repos/base/src/core/spec ... Moreover, this commit removes the 'platform' directories. That term was used in an overloaded sense. All SPEC-relative 'platform' directories are now named 'spec'. Other files, like for instance those related to the kernel/architecture specific startup library, where moved from 'platform' directories to explicit, more meaningful places like e.g.: 'src/lib/startup'. Fix #1673
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
|
|
* \brief Fiasco(x86)-specific helper functions for GDB server
|
|
* \author Christian Prochaska
|
|
* \date 2011-05-06
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
extern "C" {
|
|
#define private _private
|
|
#include "genode-low.h"
|
|
#define _private private
|
|
}
|
|
|
|
#include <base/printf.h>
|
|
#include "i386.h"
|
|
#include "cpu_session_component.h"
|
|
#include "gdbserver_platform_helper.h"
|
|
#include "gdb_stub_thread.h"
|
|
|
|
using namespace Genode;
|
|
|
|
extern "C" int genode_fetch_register(int regno, unsigned long *reg_content)
|
|
{
|
|
Thread_state thread_state;
|
|
|
|
try { thread_state = get_current_thread_state(); }
|
|
catch (...) { return 0; }
|
|
|
|
switch((enum reg_index)regno)
|
|
{
|
|
/* TODO: implement the backend function that tells gdbserver that these registers cannot be fetched */
|
|
case EAX: PDBG("cannot determine contents of register EAX"); return -1;
|
|
case ECX: PDBG("cannot determine contents of register ECX"); return -1;
|
|
case EDX: PDBG("cannot determine contents of register EDX"); return -1;
|
|
case EBX: PDBG("cannot determine contents of register EBX"); return -1;
|
|
case UESP: *reg_content = thread_state.sp; PDBG("ESP = %8lx", *reg_content); return 0;
|
|
case EBP:
|
|
|
|
/*
|
|
* When in a syscall, the user EBP has been pushed onto the stack at address ESP+0
|
|
*
|
|
* looking for syscall pattern:
|
|
* EIP-2: cd 30 int $30
|
|
*/
|
|
if ((genode_read_memory_byte((void*)(thread_state.ip - 1)) == 0x30) &&
|
|
(genode_read_memory_byte((void*)(thread_state.ip - 2)) == 0xcd)) {
|
|
*reg_content = genode_read_memory_byte((void*)(thread_state.sp + 0)) +
|
|
(genode_read_memory_byte((void*)(thread_state.sp + 1)) << 8) +
|
|
(genode_read_memory_byte((void*)(thread_state.sp + 2)) << 16) +
|
|
(genode_read_memory_byte((void*)(thread_state.sp + 3)) << 24);
|
|
PDBG("ESP = %8lx", *reg_content);
|
|
return 0;
|
|
} else {
|
|
PDBG("cannot determine contents of register EBP"); return -1;
|
|
}
|
|
case ESI: PDBG("cannot determine contents of register ESI"); return -1;
|
|
case EDI: PDBG("cannot determine contents of register EDI"); return -1;
|
|
case EIP: *reg_content = thread_state.ip; PDBG("EIP = %8lx", *reg_content); return 0;
|
|
case EFL: PDBG("cannot determine contents of register EFLAGS"); return -1;
|
|
case CS: PDBG("cannot determine contents of register CS"); return -1;
|
|
case SS: PDBG("cannot determine contents of register SS"); return -1;
|
|
case DS: PDBG("cannot determine contents of register DS"); return -1;
|
|
case ES: PDBG("cannot determine contents of register ES"); return -1;
|
|
case FS: PDBG("cannot determine contents of register FS"); return -1;
|
|
case GS: PDBG("cannot determine contents of register GS"); return -1;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
extern "C" void genode_store_register(int regno, unsigned long reg_content)
|
|
{
|
|
PDBG("not implemented yet for this platform");
|
|
}
|
|
|