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Annotation of kernel/machdep/i386/kdp_machdep.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1993 NeXT Computer, Inc.  All rights reserved.
        !            27:  *
        !            28:  * kdp_machdep.c -- Machine-dependent code for Remote Debugging Protocol
        !            29:  *
        !            30:  * History:
        !            31:  *
        !            32:  * 10 Nov 1997 Herb Ruth [[email protected]]
        !            33:  *     Added extern declarations for implicit function
        !            34:  *     declarations. Changed dprintf macro to call kprintf()
        !            35:  *     instead of safe_prf() when KDP_TEST_HARNESS==1.
        !            36:  */
        !            37:  
        !            38: #import <sys/param.h>
        !            39: #import <sys/systm.h>
        !            40: #import <sys/mbuf.h>
        !            41: #import <sys/socket.h>
        !            42: #import <net/if.h>
        !            43: #import <net/route.h>
        !            44: #import <netinet/in.h>
        !            45: #import <netinet/in_systm.h>
        !            46: #import <netinet/ip.h>
        !            47: #import <netinet/ip_var.h>
        !            48: #import <netinet/in_pcb.h>
        !            49: 
        !            50: #import <mach/mach_types.h>
        !            51: 
        !            52: #import <kern/kdp_internal.h>
        !            53: #import <kern/miniMon.h>
        !            54: 
        !            55: #import <machdep/i386/sel_inline.h>
        !            56: #import <machdep/i386/intr_exported.h>
        !            57: 
        !            58: #import <bsd/sys/conf.h>
        !            59: 
        !            60: #define KDP_TEST_HARNESS 0
        !            61: #if KDP_TEST_HARNESS
        !            62: /*#define dprintf(x) safe_prf(x)*/
        !            63: #define dprintf(x) kprintf x
        !            64: #else
        !            65: #define dprintf(x)
        !            66: #endif
        !            67: 
        !            68: void
        !            69: kdp_getstate(
        !            70:     i386_thread_state_t                *state
        !            71: )
        !            72: {
        !            73:     thread_saved_state_t       *saved_state;
        !            74:     
        !            75:     saved_state = (thread_saved_state_t *)kdp.saved_state;
        !            76:     
        !            77:     *state = (i386_thread_state_t) { 0 };      
        !            78:     state->eax = saved_state->regs.eax;
        !            79:     state->ebx = saved_state->regs.ebx;
        !            80:     state->ecx = saved_state->regs.ecx;
        !            81:     state->edx = saved_state->regs.edx;
        !            82:     state->edi = saved_state->regs.edi;
        !            83:     state->esi = saved_state->regs.esi;
        !            84:     state->ebp = saved_state->regs.ebp;
        !            85:     state->esp = (unsigned int)&saved_state->frame.esp;        /* XXX */
        !            86:     state->ss = sel_to_selector(saved_state->frame.ss);
        !            87:     state->eflags = saved_state->frame.eflags;
        !            88:     state->eip = saved_state->frame.eip;
        !            89:     state->cs = sel_to_selector(saved_state->frame.cs);
        !            90:     state->ds = sel_to_selector(saved_state->regs.ds);
        !            91:     state->es = sel_to_selector(saved_state->regs.es);
        !            92:     state->fs = sel_to_selector(saved_state->regs.fs);
        !            93:     state->gs = sel_to_selector(saved_state->regs.gs);
        !            94: }
        !            95: 
        !            96: 
        !            97: void
        !            98: kdp_setstate(
        !            99:     i386_thread_state_t                *state
        !           100: )
        !           101: {
        !           102:     thread_saved_state_t       *saved_state;
        !           103:     
        !           104:     saved_state = (thread_saved_state_t *)kdp.saved_state;
        !           105: 
        !           106:     saved_state->regs.eax = state->eax;
        !           107:     saved_state->regs.ebx = state->ebx;
        !           108:     saved_state->regs.ecx = state->ecx;
        !           109:     saved_state->regs.edx = state->edx;
        !           110:     saved_state->regs.edi = state->edi;
        !           111:     saved_state->regs.esi = state->esi;
        !           112:     saved_state->regs.ebp = state->ebp;
        !           113:     saved_state->frame.eflags = state->eflags;
        !           114: #if    0
        !           115:     saved_state->frame.eflags &= ~( EFL_VM | EFL_NT | EFL_IOPL | EFL_CLR );
        !           116:     saved_state->frame.eflags |=  ( EFL_IF | EFL_SET );
        !           117: #endif
        !           118:     saved_state->frame.eip = state->eip;
        !           119:     saved_state->regs.fs = selector_to_sel(state->fs);
        !           120:     saved_state->regs.gs = selector_to_sel(state->gs);
        !           121: }
        !           122: 
        !           123: 
        !           124: void
        !           125: kdp_exception(
        !           126:     unsigned char      *pkt,
        !           127:     int                        *len,
        !           128:     unsigned short     *remote_port,
        !           129:     unsigned int       exception,
        !           130:     unsigned int       code,
        !           131:     unsigned int       subcode
        !           132: )
        !           133: {
        !           134:     kdp_exception_t    *rq = (kdp_exception_t *)pkt;
        !           135: 
        !           136:     rq->hdr.request = KDP_EXCEPTION;
        !           137:     rq->hdr.is_reply = 0;
        !           138:     rq->hdr.seq = kdp.exception_seq;
        !           139:     rq->hdr.key = 0;
        !           140:     rq->hdr.len = sizeof (*rq);
        !           141:     
        !           142:     rq->n_exc_info = 1;
        !           143:     rq->exc_info->cpu = 0;
        !           144:     rq->exc_info->exception = exception;
        !           145:     rq->exc_info->code = code;
        !           146:     rq->exc_info->subcode = subcode;
        !           147:     
        !           148:     rq->hdr.len += rq->n_exc_info * sizeof (kdp_exc_info_t);
        !           149:     
        !           150:     kdp.exception_ack_needed = TRUE;
        !           151:     
        !           152:     *remote_port = kdp.exception_port;
        !           153:     *len = rq->hdr.len;
        !           154: }
        !           155: 
        !           156: void
        !           157: kdp_exception_ack(
        !           158:     unsigned char      *pkt,
        !           159:     int                        len
        !           160: )
        !           161: {
        !           162:     kdp_exception_ack_t        *rq = (kdp_exception_ack_t *)pkt;
        !           163: 
        !           164:     if (len < sizeof (*rq))
        !           165:        return;
        !           166:        
        !           167:     if (!rq->hdr.is_reply || rq->hdr.request != KDP_EXCEPTION)
        !           168:        return;
        !           169:        
        !           170:     dprintf(("kdp_exception_ack seq %x %x\n", rq->hdr.seq, kdp.exception_seq));
        !           171:        
        !           172:     if (rq->hdr.seq == kdp.exception_seq) {
        !           173:        kdp.exception_ack_needed = FALSE;
        !           174:        kdp.exception_seq++;
        !           175:     }
        !           176: }
        !           177: 
        !           178: kdp_error_t
        !           179: kdp_machine_read_regs(
        !           180:     unsigned int cpu,
        !           181:     unsigned int flavor,
        !           182:     char *data,
        !           183:     int *size
        !           184: )
        !           185: {
        !           186:     switch (flavor) {
        !           187: 
        !           188:     case i386_THREAD_STATE:
        !           189: 
        !           190:        dprintf(("kdp_readregs THREAD_STATE\n"));
        !           191:        kdp_getstate((i386_thread_state_t *)data);
        !           192:        *size = sizeof (i386_thread_state_t);
        !           193:        return KDPERR_NO_ERROR;
        !           194:        
        !           195:     case i386_THREAD_FPSTATE:
        !           196:        dprintf(("kdp_readregs THREAD_FPSTATE\n"));
        !           197:        *(i386_thread_fpstate_t *)data = (i386_thread_fpstate_t) { 0 }; 
        !           198:        *size = sizeof (i386_thread_fpstate_t);
        !           199:        return KDPERR_NO_ERROR;
        !           200:        
        !           201:     default:
        !           202:        dprintf(("kdp_readregs bad flavor %d\n"));
        !           203:        return KDPERR_BADFLAVOR;
        !           204:     }
        !           205: }
        !           206: 
        !           207: kdp_error_t
        !           208: kdp_machine_write_regs(
        !           209:     unsigned int cpu,
        !           210:     unsigned int flavor,
        !           211:     char *data,
        !           212:     int *size
        !           213: )
        !           214: {
        !           215:     switch (flavor) {
        !           216: 
        !           217:     case i386_THREAD_STATE:
        !           218:        dprintf(("kdp_writeregs THREAD_STATE\n"));
        !           219:        kdp_setstate((i386_thread_state_t *)data);
        !           220:        return KDPERR_NO_ERROR;
        !           221:        
        !           222:     case i386_THREAD_FPSTATE:
        !           223:        dprintf(("kdp_writeregs THREAD_FPSTATE\n"));
        !           224:        return KDPERR_NO_ERROR;
        !           225:        
        !           226:     default:
        !           227:        dprintf(("kdp_writeregs bad flavor %d\n"));
        !           228:        return KDPERR_BADFLAVOR;
        !           229:     }
        !           230: }
        !           231: 
        !           232: void
        !           233: kdp_machine_hostinfo(
        !           234:     kdp_hostinfo_t *hostinfo
        !           235: )
        !           236: {
        !           237:     hostinfo->cpus_mask = 1;
        !           238:     hostinfo->cpu_type = CPU_TYPE_I386;
        !           239:     hostinfo->cpu_subtype = CPU_SUBTYPE_486;
        !           240: }
        !           241: 
        !           242: void
        !           243: kdp_panic(
        !           244:     const char         *msg
        !           245: )
        !           246: {
        !           247:     safe_prf("kdp panic: %s\n", msg);
        !           248:     
        !           249:     asm volatile("hlt");
        !           250: }
        !           251: 
        !           252: 
        !           253: void
        !           254: kdp_reboot(void)
        !           255: {
        !           256:     keyboard_reboot();
        !           257: }
        !           258: 
        !           259: int
        !           260: kdp_intr_disbl(void)
        !           261: {
        !           262:     return intr_disbl();
        !           263: }
        !           264: 
        !           265: void
        !           266: kdp_intr_enbl(int s)
        !           267: {
        !           268:     intr_enbl(s);
        !           269: }
        !           270: 
        !           271: void
        !           272: kdp_us_spin(int usec)
        !           273: {
        !           274:     us_spin(usec);
        !           275: }
        !           276: 
        !           277: void
        !           278: kdp_flush_cache(void)
        !           279: {
        !           280:     /* no-op on i386 */
        !           281: }
        !           282: 

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