X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-arch.c;h=1cb0de35cf91d2bdade567eac172e24742b47a6f;hb=f35f14479a64dd97f93d2d91dc154bdc141d6842;hp=406030fc3f67b4f3bb4948e6ed225e0a289f0545;hpb=a530bbe337109d898d5b4a001fc8f1afa3b5dc39;p=sbcl.git diff --git a/src/runtime/x86-arch.c b/src/runtime/x86-arch.c index 406030f..1cb0de3 100644 --- a/src/runtime/x86-arch.c +++ b/src/runtime/x86-arch.c @@ -9,17 +9,13 @@ * files for more information. */ -/* - * $Header$ - */ - #include +#include "sbcl.h" #include "runtime.h" #include "globals.h" #include "validate.h" #include "os.h" -#include "sbcl.h" #include "arch.h" #include "lispregs.h" #include "signal.h" @@ -27,13 +23,27 @@ #include "interrupt.h" #include "interr.h" #include "breakpoint.h" +#include "monitor.h" +#include "thread.h" + +#include "genesis/static-symbols.h" +#include "genesis/symbol.h" -#define BREAKPOINT_INST 0xcc /* INT3 */ +#define BREAKPOINT_INST 0xcc /* INT3 */ unsigned long fast_random_state = 1; void arch_init(void) {} + +#ifndef LISP_FEATURE_WIN32 +os_vm_address_t +arch_get_bad_addr(int sig, siginfo_t *code, os_context_t *context) +{ + return (os_vm_address_t)code->si_addr; +} +#endif + /* * hacking signal contexts @@ -45,7 +55,7 @@ void arch_init(void) int * context_eflags_addr(os_context_t *context) { -#if defined __linux__ +#if defined __linux__ || defined __sun /* KLUDGE: As of kernel 2.2.14 on Red Hat 6.2, there's code in the * file to define symbolic names for offsets into * gregs[], but it's conditional on __USE_GNU and not defined, so @@ -56,6 +66,12 @@ context_eflags_addr(os_context_t *context) return &context->uc_mcontext.mc_eflags; #elif defined __OpenBSD__ return &context->sc_eflags; +#elif defined LISP_FEATURE_DARWIN + return &context->uc_mcontext->ss.eflags; +#elif defined __NetBSD__ + return &(context->uc_mcontext.__gregs[_REG_EFL]); +#elif defined LISP_FEATURE_WIN32 + return (int *)&context->EFlags; #else #error unsupported OS #endif @@ -71,39 +87,38 @@ void arch_skip_instruction(os_context_t *context) int vlen; int code; - FSHOW((stderr, "[arch_skip_inst at %x]\n", *os_context_pc_addr(context))); /* Get and skip the Lisp interrupt code. */ code = *(char*)(*os_context_pc_addr(context))++; switch (code) - { - case trap_Error: - case trap_Cerror: - /* Lisp error arg vector length */ - vlen = *(char*)(*os_context_pc_addr(context))++; - /* Skip Lisp error arg data bytes. */ - while (vlen-- > 0) { - (char*)(*os_context_pc_addr(context))++; - } - break; - - case trap_Breakpoint: /* not tested */ - case trap_FunctionEndBreakpoint: /* not tested */ - break; - - case trap_PendingInterrupt: - case trap_Halt: - /* only needed to skip the Code */ - break; - - default: - fprintf(stderr,"[arch_skip_inst invalid code %d\n]\n",code); - break; - } + { + case trap_Error: + case trap_Cerror: + /* Lisp error arg vector length */ + vlen = *(char*)(*os_context_pc_addr(context))++; + /* Skip Lisp error arg data bytes. */ + while (vlen-- > 0) { + ++*os_context_pc_addr(context); + } + break; + + case trap_Breakpoint: /* not tested */ + case trap_FunEndBreakpoint: /* not tested */ + break; + + case trap_PendingInterrupt: + case trap_Halt: + /* only needed to skip the Code */ + break; + + default: + fprintf(stderr,"[arch_skip_inst invalid code %d\n]\n",code); + break; + } FSHOW((stderr, - "[arch_skip_inst resuming at %x]\n", - *os_context_pc_addr(context))); + "/[arch_skip_inst resuming at %x]\n", + *os_context_pc_addr(context))); } unsigned char * @@ -115,167 +130,155 @@ arch_internal_error_arguments(os_context_t *context) boolean arch_pseudo_atomic_atomic(os_context_t *context) { - return SymbolValue(PSEUDO_ATOMIC_ATOMIC); + return SymbolValue(PSEUDO_ATOMIC_ATOMIC,arch_os_get_current_thread()); } void arch_set_pseudo_atomic_interrupted(os_context_t *context) { - SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(1)); + SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(1), + arch_os_get_current_thread()); +} + +void +arch_clear_pseudo_atomic_interrupted(os_context_t *context) +{ + SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0), + arch_os_get_current_thread()); } /* * This stuff seems to get called for TRACE and debug activity. */ -unsigned long +unsigned int arch_install_breakpoint(void *pc) { - unsigned long result = *(unsigned long*)pc; + unsigned int result = *(unsigned int*)pc; - *(char*)pc = BREAKPOINT_INST; /* x86 INT3 */ - *((char*)pc+1) = trap_Breakpoint; /* Lisp trap code */ + *(char*)pc = BREAKPOINT_INST; /* x86 INT3 */ + *((char*)pc+1) = trap_Breakpoint; /* Lisp trap code */ return result; } void -arch_remove_breakpoint(void *pc, unsigned long orig_inst) +arch_remove_breakpoint(void *pc, unsigned int orig_inst) { *((char *)pc) = orig_inst & 0xff; *((char *)pc + 1) = (orig_inst & 0xff00) >> 8; } -/* When single stepping, single_stepping holds the original instruction - * PC location. */ -unsigned int *single_stepping=NULL; -#ifndef __linux__ -unsigned int single_step_save1; -unsigned int single_step_save2; -unsigned int single_step_save3; -#endif void -arch_do_displaced_inst(os_context_t *context, unsigned long orig_inst) +arch_do_displaced_inst(os_context_t *context, unsigned int orig_inst) { unsigned int *pc = (unsigned int*)(*os_context_pc_addr(context)); /* Put the original instruction back. */ *((char *)pc) = orig_inst & 0xff; *((char *)pc + 1) = (orig_inst & 0xff00) >> 8; - -#ifdef __linux__ - *context_eflags_addr(context) |= 0x100; -#else - /* Install helper instructions for the single step: - * pushf; or [esp],0x100; popf. */ - single_step_save1 = *(pc-3); - single_step_save2 = *(pc-2); - single_step_save3 = *(pc-1); - *(pc-3) = 0x9c909090; - *(pc-2) = 0x00240c81; - *(pc-1) = 0x9d000001; -#endif - - single_stepping = (unsigned int*)pc; - -#ifndef __linux__ - *os_context_pc_addr(context) = (char *)pc - 9; -#endif } + void sigtrap_handler(int signal, siginfo_t *info, void *void_context) { - int code = info->si_code; os_context_t *context = (os_context_t*)void_context; unsigned int trap; - SHOW("entering sigtrap_handler(..)"); /* REMOVEME */ - - if (single_stepping && (signal==SIGTRAP)) - { - /* fprintf(stderr,"* single step trap %x\n", single_stepping); */ - -#ifndef __linux__ - /* Un-install single step helper instructions. */ - *(single_stepping-3) = single_step_save1; - *(single_stepping-2) = single_step_save2; - *(single_stepping-1) = single_step_save3; -#else - *context_eflags_addr(context) ^= 0x100; -#endif - /* Re-install the breakpoint if possible. */ - if (*os_context_pc_addr(context) == (int)single_stepping + 1) { - fprintf(stderr, "warning: couldn't reinstall breakpoint\n"); - } else { - char *ptr = (char*)single_stepping; - *((char *)single_stepping) = BREAKPOINT_INST; /* x86 INT3 */ - *((char *)single_stepping+1) = trap_Breakpoint; - } - - single_stepping = NULL; - return; - } - /* This is just for info in case the monitor wants to print an * approximation. */ current_control_stack_pointer = - (lispobj*)*os_context_sp_addr(context); + (lispobj *)*os_context_sp_addr(context); + +#ifdef LISP_FEATURE_LINUX + os_restore_fp_control(context); +#endif /* On entry %eip points just after the INT3 byte and aims at the * 'kind' value (eg trap_Cerror). For error-trap and Cerror-trap a * number of bytes will follow, the first is the length of the byte * arguments to follow. */ trap = *(unsigned char *)(*os_context_pc_addr(context)); + /* FSHOW((stderr, "/\n", trap, *os_context_pc_addr(context))); */ switch (trap) { case trap_PendingInterrupt: - FSHOW((stderr, "\n")); - arch_skip_instruction(context); - interrupt_handle_pending(context); - break; + FSHOW((stderr, "/\n")); + arch_skip_instruction(context); + interrupt_handle_pending(context); + break; case trap_Halt: - /* Note: the old CMU CL code tried to save FPU state - * here, and restore it after we do our thing, but there - * seems to be no point in doing that, since we're just - * going to lose(..) anyway. */ - SHOW("in trap_Halt case of sigtrap_handler(..)"); /* REMOVEME */ - fake_foreign_function_call(context); - lose("%%primitive halt called; the party is over."); + /* Note: the old CMU CL code tried to save FPU state + * here, and restore it after we do our thing, but there + * seems to be no point in doing that, since we're just + * going to lose(..) anyway. */ + fake_foreign_function_call(context); + lose("%%PRIMITIVE HALT called; the party is over.\n"); case trap_Error: case trap_Cerror: - FSHOW((stderr, "\n", code)); - interrupt_internal_error(signal, info, context, code==trap_Cerror); - break; + FSHOW((stderr, "\n", trap)); + interrupt_internal_error(signal, info, context, trap==trap_Cerror); + break; case trap_Breakpoint: - (char*)(*os_context_pc_addr(context)) -= 1; - handle_breakpoint(signal, info, context); - break; + --*os_context_pc_addr(context); + handle_breakpoint(signal, info, context); + break; - case trap_FunctionEndBreakpoint: - (char*)(*os_context_pc_addr(context)) -= 1; - *os_context_pc_addr(context) = - (int)handle_function_end_breakpoint(signal, info, context); - break; + case trap_FunEndBreakpoint: + --*os_context_pc_addr(context); + *os_context_pc_addr(context) = + (int)handle_fun_end_breakpoint(signal, info, context); + break; default: - FSHOW((stderr,"[C--trap default %d %d %x]\n", - signal, code, context)); - interrupt_handle_now(signal, info, context); - break; + FSHOW((stderr,"/[C--trap default %d %d %x]\n", + signal, trap, context)); + interrupt_handle_now(signal, info, context); + break; + } +} + +static void +sigill_handler(int signal, siginfo_t *siginfo, void *void_context) { + os_context_t *context = (os_context_t*)void_context; + +#if defined(LISP_FEATURE_DARWIN) + if (*((unsigned short *)*os_context_pc_addr(context)) == 0x0b0f) { + *os_context_pc_addr(context) += 2; + return sigtrap_handler(signal, siginfo, void_context); } - SHOW("leaving sigtrap_handler(..)"); /* REMOVEME */ +#endif + + fake_foreign_function_call(context); + monitor_or_something(); } void arch_install_interrupt_handlers() { - interrupt_install_low_level_handler(SIGILL , sigtrap_handler); - interrupt_install_low_level_handler(SIGTRAP, sigtrap_handler); + SHOW("entering arch_install_interrupt_handlers()"); + + /* Note: The old CMU CL code here used sigtrap_handler() to handle + * SIGILL as well as SIGTRAP. I couldn't see any reason to do + * things that way. So, I changed to separate handlers when + * debugging a problem on OpenBSD, where SBCL wasn't catching + * SIGILL properly, but was instead letting the process be + * terminated with an "Illegal instruction" output. If this change + * turns out to break something (maybe breakpoint handling on some + * OS I haven't tested on?) and we have to go back to the old CMU + * CL way, I hope there will at least be a comment to explain + * why.. -- WHN 2001-06-07 */ +#ifndef LISP_FEATURE_WIN32 + undoably_install_low_level_interrupt_handler(SIGILL , sigill_handler); + undoably_install_low_level_interrupt_handler(SIGTRAP, sigtrap_handler); +#endif + + SHOW("returning from arch_install_interrupt_handlers()"); } /* This is implemented in assembly language and called from C: */ @@ -290,11 +293,13 @@ call_into_lisp(lispobj fun, lispobj *args, int nargs); * could be in registers depending on what the compiler likes. So we * copy the args into a portable vector and let the assembly language * call-in function figure it out. */ + lispobj funcall0(lispobj function) { lispobj *args = NULL; + FSHOW((stderr, "/entering funcall0(0x%lx)\n", (long)function)); return call_into_lisp(function, args, 0); } lispobj @@ -321,3 +326,35 @@ funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2) args[2] = arg2; return call_into_lisp(function, args, 3); } + +#ifdef LISP_FEATURE_LINKAGE_TABLE +/* FIXME: It might be cleaner to generate these from the lisp side of + * things. + */ + +void +arch_write_linkage_table_jmp(char * reloc, void * fun) +{ + /* Make JMP to function entry. JMP offset is calculated from next + * instruction. + */ + long offset = (char *)fun - (reloc + 5); + int i; + + *reloc++ = 0xe9; /* opcode for JMP rel32 */ + for (i = 0; i < 4; i++) { + *reloc++ = offset & 0xff; + offset >>= 8; + } + + /* write a nop for good measure. */ + *reloc = 0x90; +} + +void +arch_write_linkage_table_ref(void * reloc, void * data) +{ + *(unsigned long *)reloc = (unsigned long)data; +} + +#endif