/* src/vm/jit/x86_64/linux/md-os.c - machine dependent x86_64 Linux functions Copyright (C) 2007, 2008 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO This file is part of CACAO. 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #define _GNU_SOURCE #include "config.h" #include #include #include #include #include "vm/types.h" #include "vm/jit/x86_64/codegen.h" #include "vm/jit/x86_64/md.h" #include "threads/thread.hpp" #include "vm/signallocal.hpp" #include "vm/jit/asmpart.h" #include "vm/jit/executionstate.h" #include "vm/jit/trap.hpp" /** * Signal handler for hardware exception. */ void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p) { ucontext_t* _uc = (ucontext_t *) _p; mcontext_t* _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ void* xpc = (void*) _mc->gregs[REG_RIP]; // Handle the trap. trap_handle(TRAP_SIGSEGV, xpc, _p); } /** * ArithmeticException signal handler for hardware divide by zero * check. */ void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p) { ucontext_t* _uc = (ucontext_t *) _p; mcontext_t* _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ void* xpc = (void*) _mc->gregs[REG_RIP]; // Handle the trap. trap_handle(TRAP_SIGFPE, xpc, _p); } /** * Signal handler for patchers. */ void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p) { ucontext_t* _uc = (ucontext_t *) _p; mcontext_t* _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ void* xpc = (void*) _mc->gregs[REG_RIP]; // Handle the trap. trap_handle(TRAP_SIGILL, xpc, _p); } /* md_signal_handler_sigusr2 *************************************************** Signal handler for profiling sampling. *******************************************************************************/ #if defined(ENABLE_THREADS) void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p) { threadobject *t; ucontext_t *_uc; mcontext_t *_mc; u1 *pc; t = THREADOBJECT; _uc = (ucontext_t *) _p; _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ pc = (u1 *) _mc->gregs[REG_RIP]; t->pc = pc; } #endif /* md_executionstate_read ****************************************************** Read the given context into an executionstate. *******************************************************************************/ void md_executionstate_read(executionstate_t *es, void *context) { ucontext_t *_uc; mcontext_t *_mc; s4 i; s4 d; _uc = (ucontext_t *) context; _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ /* read special registers */ es->pc = (u1 *) _mc->gregs[REG_RIP]; es->sp = (u1 *) _mc->gregs[REG_RSP]; es->pv = NULL; /* read integer registers */ for (i = 0; i < INT_REG_CNT; i++) { /* XXX FIX ME! */ switch (i) { case 0: /* REG_RAX == 13 */ d = REG_RAX; break; case 1: /* REG_RCX == 14 */ d = REG_RCX; break; case 2: /* REG_RDX == 12 */ d = REG_RDX; break; case 3: /* REG_RBX == 11 */ d = REG_RBX; break; case 4: /* REG_RSP == 15 */ d = REG_RSP; break; case 5: /* REG_RBP == 10 */ d = REG_RBP; break; case 6: /* REG_RSI == 9 */ d = REG_RSI; break; case 7: /* REG_RDI == 8 */ d = REG_RDI; break; case 8: /* REG_R8 == 0 */ case 9: /* REG_R9 == 1 */ case 10: /* REG_R10 == 2 */ case 11: /* REG_R11 == 3 */ case 12: /* REG_R12 == 4 */ case 13: /* REG_R13 == 5 */ case 14: /* REG_R14 == 6 */ case 15: /* REG_R15 == 7 */ d = i - 8; break; } es->intregs[i] = _mc->gregs[d]; } /* read float registers */ for (i = 0; i < FLT_REG_CNT; i++) es->fltregs[i] = 0xdeadbeefdeadbeefL; } /* md_executionstate_write ***************************************************** Write the given executionstate back to the context. *******************************************************************************/ void md_executionstate_write(executionstate_t *es, void *context) { ucontext_t *_uc; mcontext_t *_mc; s4 i; s4 d; _uc = (ucontext_t *) context; _mc = &_uc->uc_mcontext; /* ATTENTION: Don't use CACAO's internal REG_* defines as they are different to the ones in . */ /* write integer registers */ for (i = 0; i < INT_REG_CNT; i++) { /* XXX FIX ME! */ switch (i) { case 0: /* REG_RAX == 13 */ d = REG_RAX; break; case 1: /* REG_RCX == 14 */ d = REG_RCX; break; case 2: /* REG_RDX == 12 */ d = REG_RDX; break; case 3: /* REG_RBX == 11 */ d = REG_RBX; break; case 4: /* REG_RSP == 15 */ d = REG_RSP; break; case 5: /* REG_RBP == 10 */ d = REG_RBP; break; case 6: /* REG_RSI == 9 */ d = REG_RSI; break; case 7: /* REG_RDI == 8 */ d = REG_RDI; break; case 8: /* REG_R8 == 0 */ case 9: /* REG_R9 == 1 */ case 10: /* REG_R10 == 2 */ case 11: /* REG_R11 == 3 */ case 12: /* REG_R12 == 4 */ case 13: /* REG_R13 == 5 */ case 14: /* REG_R14 == 6 */ case 15: /* REG_R15 == 7 */ d = i - 8; break; } _mc->gregs[d] = es->intregs[i]; } /* write special registers */ _mc->gregs[REG_RIP] = (ptrint) es->pc; _mc->gregs[REG_RSP] = (ptrint) es->sp; } /* * These are local overrides for various environment variables in Emacs. * Please do not remove this and leave it at the end of the file, where * Emacs will automagically detect them. * --------------------------------------------------------------------- * Local variables: * mode: c * indent-tabs-mode: t * c-basic-offset: 4 * tab-width: 4 * End: * vim:noexpandtab:sw=4:ts=4: */