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macemu/BasiliskII/src/CrossPlatform/sigsegv.h

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/*
* sigsegv.h - SIGSEGV signals support
*
* Derived from Bruno Haible's work on his SIGSEGV library for clisp
* <http://clisp.sourceforge.net/>
*
* Basilisk II (C) 1997-2008 Christian Bauer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef SIGSEGV_H
#define SIGSEGV_H
#define SIGSEGV_MAJOR_VERSION 1
#define SIGSEGV_MINOR_VERSION 0
#define SIGSEGV_MICRO_VERSION 0
#define SIGSEGV_CHECK_VERSION(MAJOR, MINOR, MICRO) \
(SIGSEGV_MAJOR_VERSION > (MAJOR) || \
(SIGSEGV_MAJOR_VERSION == (MAJOR) && SIGSEGV_MINOR_VERSION > (MINOR)) || \
(SIGSEGV_MAJOR_VERSION == (MAJOR) && SIGSEGV_MINOR_VERSION == (MINOR) && SIGSEGV_MICRO_VERSION >= (MICRO)))
// Address type
typedef char *sigsegv_address_t;
// SIGSEGV handler argument (forward declaration)
#if HAVE_MACH_EXCEPTIONS
#if defined(__APPLE__) && defined(__MACH__)
extern "C" {
#include <mach/mach.h>
#include <mach/mach_error.h>
}
#ifdef __ppc__
#if __DARWIN_UNIX03 && defined _STRUCT_PPC_THREAD_STATE
#define MACH_FIELD_NAME(X) __CONCAT(__,X)
#endif
#define SIGSEGV_EXCEPTION_STATE_TYPE ppc_exception_state_t
#define SIGSEGV_EXCEPTION_STATE_FLAVOR PPC_EXCEPTION_STATE
#define SIGSEGV_EXCEPTION_STATE_COUNT PPC_EXCEPTION_STATE_COUNT
#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.MACH_FIELD_NAME(dar)
#define SIGSEGV_THREAD_STATE_TYPE ppc_thread_state_t
#define SIGSEGV_THREAD_STATE_FLAVOR PPC_THREAD_STATE
#define SIGSEGV_THREAD_STATE_COUNT PPC_THREAD_STATE_COUNT
#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.MACH_FIELD_NAME(srr0)
#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
#define SIGSEGV_REGISTER_FILE (unsigned long *)&SIP->thr_state.MACH_FIELD_NAME(srr0), (unsigned long *)&SIP->thr_state.MACH_FIELD_NAME(r0)
#endif
#ifdef __ppc64__
#if __DARWIN_UNIX03 && defined _STRUCT_PPC_THREAD_STATE64
#define MACH_FIELD_NAME(X) __CONCAT(__,X)
#endif
#define SIGSEGV_EXCEPTION_STATE_TYPE ppc_exception_state64_t
#define SIGSEGV_EXCEPTION_STATE_FLAVOR PPC_EXCEPTION_STATE64
#define SIGSEGV_EXCEPTION_STATE_COUNT PPC_EXCEPTION_STATE64_COUNT
#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.MACH_FIELD_NAME(dar)
#define SIGSEGV_THREAD_STATE_TYPE ppc_thread_state64_t
#define SIGSEGV_THREAD_STATE_FLAVOR PPC_THREAD_STATE64
#define SIGSEGV_THREAD_STATE_COUNT PPC_THREAD_STATE64_COUNT
#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.MACH_FIELD_NAME(srr0)
#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
#define SIGSEGV_REGISTER_FILE (unsigned long *)&SIP->thr_state.MACH_FIELD_NAME(srr0), (unsigned long *)&SIP->thr_state.MACH_FIELD_NAME(r0)
#endif
#ifdef __i386__
#if __DARWIN_UNIX03 && defined _STRUCT_X86_THREAD_STATE32
#define MACH_FIELD_NAME(X) __CONCAT(__,X)
#endif
#define SIGSEGV_EXCEPTION_STATE_TYPE i386_exception_state_t
#define SIGSEGV_EXCEPTION_STATE_FLAVOR i386_EXCEPTION_STATE
#define SIGSEGV_EXCEPTION_STATE_COUNT i386_EXCEPTION_STATE_COUNT
#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.MACH_FIELD_NAME(faultvaddr)
#define SIGSEGV_THREAD_STATE_TYPE i386_thread_state_t
#define SIGSEGV_THREAD_STATE_FLAVOR i386_THREAD_STATE
#define SIGSEGV_THREAD_STATE_COUNT i386_THREAD_STATE_COUNT
#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.MACH_FIELD_NAME(eip)
#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIP->thr_state.MACH_FIELD_NAME(eax)) /* EAX is the first GPR we consider */
#endif
#ifdef __x86_64__
#if __DARWIN_UNIX03 && defined _STRUCT_X86_THREAD_STATE64
#define MACH_FIELD_NAME(X) __CONCAT(__,X)
#endif
#define SIGSEGV_EXCEPTION_STATE_TYPE x86_exception_state64_t
#define SIGSEGV_EXCEPTION_STATE_FLAVOR x86_EXCEPTION_STATE64
#define SIGSEGV_EXCEPTION_STATE_COUNT x86_EXCEPTION_STATE64_COUNT
#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.MACH_FIELD_NAME(faultvaddr)
#define SIGSEGV_THREAD_STATE_TYPE x86_thread_state64_t
#define SIGSEGV_THREAD_STATE_FLAVOR x86_THREAD_STATE64
#define SIGSEGV_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.MACH_FIELD_NAME(rip)
#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIP->thr_state.MACH_FIELD_NAME(rax)) /* RAX is the first GPR we consider */
#endif
#ifdef __aarch64__
#if __DARWIN_UNIX03 && defined _STRUCT_ARM_THREAD_STATE64
#define MACH_FIELD_NAME(X) __CONCAT(__,X)
#endif
#define SIGSEGV_EXCEPTION_STATE_TYPE arm_exception_state64_t
#define SIGSEGV_EXCEPTION_STATE_FLAVOR ARM_EXCEPTION_STATE64
#define SIGSEGV_EXCEPTION_STATE_COUNT ARM_EXCEPTION_STATE64_COUNT
#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.MACH_FIELD_NAME(far)
#define SIGSEGV_THREAD_STATE_TYPE arm_thread_state64_t
#define SIGSEGV_THREAD_STATE_FLAVOR ARM_THREAD_STATE64
#define SIGSEGV_THREAD_STATE_COUNT ARM_THREAD_STATE64_COUNT
#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIP->thr_state.MACH_FIELD_NAME(x[0])) /* x[0] is the first GPR we consider */
#define SIGSEGV_SKIP_INSTRUCTION aarch64_skip_instruction
#endif
#ifdef __x86_64__
#define SIGSEGV_FAULT_ADDRESS_FAST (((uint64_t)code[1])|0x100000000)
#else
#define SIGSEGV_FAULT_ADDRESS_FAST code[1]
#endif
#define SIGSEGV_FAULT_INSTRUCTION_FAST SIGSEGV_INVALID_ADDRESS
#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, mach_exception_data_t code
#define SIGSEGV_FAULT_HANDLER_ARGS thread, code
#endif
#endif
struct sigsegv_info_t {
sigsegv_address_t addr;
sigsegv_address_t pc;
#ifdef HAVE_MACH_EXCEPTIONS
mach_port_t thread;
bool has_exc_state;
SIGSEGV_EXCEPTION_STATE_TYPE exc_state;
mach_msg_type_number_t exc_state_count;
bool has_thr_state;
SIGSEGV_THREAD_STATE_TYPE thr_state;
mach_msg_type_number_t thr_state_count;
#endif
};
// SIGSEGV handler return state
enum sigsegv_return_t {
SIGSEGV_RETURN_SUCCESS,
SIGSEGV_RETURN_FAILURE,
SIGSEGV_RETURN_SKIP_INSTRUCTION
};
// Type of a SIGSEGV handler. Returns boolean expressing successful operation
typedef sigsegv_return_t (*sigsegv_fault_handler_t)(sigsegv_info_t *sip);
// Type of a SIGSEGV state dump function
typedef void (*sigsegv_state_dumper_t)(sigsegv_info_t *sip);
// Install a SIGSEGV handler. Returns boolean expressing success
extern bool sigsegv_install_handler(sigsegv_fault_handler_t handler);
// Remove the user SIGSEGV handler, revert to default behavior
extern void sigsegv_uninstall_handler(void);
// Set callback function when we cannot handle the fault
extern void sigsegv_set_dump_state(sigsegv_state_dumper_t handler);
// Return the address of the invalid memory reference
extern sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *sip);
// Return the address of the instruction that caused the fault, or
// SIGSEGV_INVALID_ADDRESS if we could not retrieve this information
extern sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *sip);
// Define an address that is bound to be invalid for a program counter
const sigsegv_address_t SIGSEGV_INVALID_ADDRESS = sigsegv_address_t(-1);
#endif /* SIGSEGV_H */
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