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kdp.c
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kdp.c
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/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <mach/mach_types.h>
#include <mach/vm_param.h>
#include <sys/appleapiopts.h>
#include <kern/debug.h>
#include <uuid/uuid.h>
#include <kdp/kdp_internal.h>
#include <kdp/kdp_private.h>
#include <kdp/kdp_core.h>
#include <libsa/types.h>
#include <libkern/version.h>
#include <string.h> /* bcopy */
#include <kern/processor.h>
#include <kern/thread.h>
#include <kern/clock.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pageout.h>
#include <vm/vm_shared_region.h>
#include <libkern/OSKextLibPrivate.h>
#define DO_ALIGN 1 /* align all packet data accesses */
#define KDP_TEST_HARNESS 0
#if KDP_TEST_HARNESS
#define dprintf(x) kprintf x
#else
#define dprintf(x)
#endif
static kdp_dispatch_t
dispatch_table[KDP_INVALID_REQUEST-KDP_CONNECT] =
{
/* 0 */ kdp_connect,
/* 1 */ kdp_disconnect,
/* 2 */ kdp_hostinfo,
/* 3 */ kdp_version,
/* 4 */ kdp_maxbytes,
/* 5 */ kdp_readmem,
/* 6 */ kdp_writemem,
/* 7 */ kdp_readregs,
/* 8 */ kdp_writeregs,
/* 9 */ kdp_unknown,
/* A */ kdp_unknown,
/* B */ kdp_suspend,
/* C */ kdp_resumecpus,
/* D */ kdp_unknown,
/* E */ kdp_unknown,
/* F */ kdp_breakpoint_set,
/*10 */ kdp_breakpoint_remove,
/*11 */ kdp_regions,
/*12 */ kdp_reattach,
/*13 */ kdp_reboot,
/*14 */ kdp_readmem64,
/*15 */ kdp_writemem64,
/*16 */ kdp_breakpoint64_set,
/*17 */ kdp_breakpoint64_remove,
/*18 */ kdp_kernelversion,
/*19 */ kdp_readphysmem64,
/*1A */ kdp_writephysmem64,
/*1B */ kdp_readioport,
/*1C */ kdp_writeioport,
/*1D */ kdp_readmsr64,
/*1E */ kdp_writemsr64,
/*1F */ kdp_dumpinfo,
};
kdp_glob_t kdp;
#define MAX_BREAKPOINTS 100
/*
* Version 11 of the KDP Protocol adds support for 64-bit wide memory
* addresses (read/write and breakpoints) as well as a dedicated
* kernelversion request. Version 12 adds read/writing of physical
* memory with 64-bit wide memory addresses.
*/
#define KDP_VERSION 12
typedef struct{
mach_vm_address_t address;
uint32_t bytesused;
uint8_t oldbytes[MAX_BREAKINSN_BYTES];
} kdp_breakpoint_record_t;
static kdp_breakpoint_record_t breakpoint_list[MAX_BREAKPOINTS];
static unsigned int breakpoints_initialized = 0;
int reattach_wait = 0;
int noresume_on_disconnect = 0;
kdp_error_t
kdp_set_breakpoint_internal(
mach_vm_address_t address
);
kdp_error_t
kdp_remove_breakpoint_internal(
mach_vm_address_t address
);
boolean_t
kdp_packet(
unsigned char *pkt,
int *len,
unsigned short *reply_port
)
{
static unsigned aligned_pkt[1538/sizeof(unsigned)+1]; // max ether pkt
kdp_pkt_t *rd = (kdp_pkt_t *)&aligned_pkt;
size_t plen = *len;
kdp_req_t req;
boolean_t ret;
#if DO_ALIGN
if (plen > sizeof(aligned_pkt)) {
printf("kdp_packet bad len %lu\n", plen);
return FALSE;
}
bcopy((char *)pkt, (char *)rd, plen);
#else
rd = (kdp_pkt_t *)pkt;
#endif
if (plen < sizeof (rd->hdr) || rd->hdr.len != plen) {
printf("kdp_packet bad len pkt %lu hdr %d\n", plen, rd->hdr.len);
return (FALSE);
}
if (rd->hdr.is_reply) {
printf("kdp_packet reply recvd req %x seq %x\n",
rd->hdr.request, rd->hdr.seq);
return (FALSE);
}
req = rd->hdr.request;
if (req >= KDP_INVALID_REQUEST) {
printf("kdp_packet bad request %x len %d seq %x key %x\n",
rd->hdr.request, rd->hdr.len, rd->hdr.seq, rd->hdr.key);
return (FALSE);
}
ret = ((*dispatch_table[req - KDP_CONNECT])(rd, len, reply_port));
#if DO_ALIGN
bcopy((char *)rd, (char *) pkt, *len);
#endif
return ret;
}
static boolean_t
kdp_unknown(
kdp_pkt_t *pkt,
__unused int *len,
__unused unsigned short *reply_port
)
{
kdp_pkt_t *rd = (kdp_pkt_t *)pkt;
printf("kdp_unknown request %x len %d seq %x key %x\n",
rd->hdr.request, rd->hdr.len, rd->hdr.seq, rd->hdr.key);
return (FALSE);
}
static boolean_t
kdp_connect(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_connect_req_t *rq = &pkt->connect_req;
size_t plen = *len;
kdp_connect_reply_t *rp = &pkt->connect_reply;
uint16_t rport, eport;
uint32_t key;
uint8_t seq;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_connect seq %x greeting %s\n", rq->hdr.seq, rq->greeting));
rport = rq->req_reply_port;
eport = rq->exc_note_port;
key = rq->hdr.key;
seq = rq->hdr.seq;
if (kdp.is_conn) {
if ((seq == kdp.conn_seq) && /* duplicate request */
(rport == kdp.reply_port) &&
(eport == kdp.exception_port) &&
(key == kdp.session_key))
rp->error = KDPERR_NO_ERROR;
else
rp->error = KDPERR_ALREADY_CONNECTED;
}
else {
kdp.reply_port = rport;
kdp.exception_port = eport;
kdp.is_conn = TRUE;
kdp.conn_seq = seq;
kdp.session_key = key;
rp->error = KDPERR_NO_ERROR;
}
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = rport;
*len = rp->hdr.len;
if (current_debugger == KDP_CUR_DB)
active_debugger=1;
return (TRUE);
}
static boolean_t
kdp_disconnect(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_disconnect_req_t *rq = &pkt->disconnect_req;
size_t plen = *len;
kdp_disconnect_reply_t *rp = &pkt->disconnect_reply;
if (plen < sizeof (*rq))
return (FALSE);
if (!kdp.is_conn)
return (FALSE);
dprintf(("kdp_disconnect\n"));
*reply_port = kdp.reply_port;
kdp.reply_port = kdp.exception_port = 0;
kdp.is_halted = kdp.is_conn = FALSE;
kdp.exception_seq = kdp.conn_seq = 0;
kdp.session_key = 0;
if (debugger_panic_str != NULL)
reattach_wait = 1;
if (noresume_on_disconnect == 1) {
reattach_wait = 1;
noresume_on_disconnect = 0;
}
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*len = rp->hdr.len;
if (current_debugger == KDP_CUR_DB)
active_debugger=0;
return (TRUE);
}
static boolean_t
kdp_reattach(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_reattach_req_t *rq = &pkt->reattach_req;
kdp.is_conn = TRUE;
kdp_disconnect(pkt, len, reply_port);
*reply_port = rq->req_reply_port;
reattach_wait = 1;
return (TRUE);
}
static boolean_t
kdp_hostinfo(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_hostinfo_req_t *rq = &pkt->hostinfo_req;
size_t plen = *len;
kdp_hostinfo_reply_t *rp = &pkt->hostinfo_reply;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_hostinfo\n"));
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
kdp_machine_hostinfo(&rp->hostinfo);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_kernelversion(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_kernelversion_req_t *rq = &pkt->kernelversion_req;
size_t plen = *len;
kdp_kernelversion_reply_t *rp = &pkt->kernelversion_reply;
size_t slen;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_kernelversion\n"));
slen = strlcpy(rp->version, kdp_kernelversion_string, MAX_KDP_DATA_SIZE);
rp->hdr.len += slen + 1; /* strlcpy returns the amount copied with NUL */
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_suspend(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_suspend_req_t *rq = &pkt->suspend_req;
size_t plen = *len;
kdp_suspend_reply_t *rp = &pkt->suspend_reply;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_suspend\n"));
kdp.is_halted = TRUE;
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_resumecpus(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_resumecpus_req_t *rq = &pkt->resumecpus_req;
size_t plen = *len;
kdp_resumecpus_reply_t *rp = &pkt->resumecpus_reply;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_resumecpus %x\n", rq->cpu_mask));
kdp.is_halted = FALSE;
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_writemem(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_writemem_req_t *rq = &pkt->writemem_req;
size_t plen = *len;
kdp_writemem_reply_t *rp = &pkt->writemem_reply;
mach_vm_size_t cnt;
if (plen < sizeof (*rq))
return (FALSE);
if (rq->nbytes > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_writemem addr %x size %d\n", rq->address, rq->nbytes));
cnt = kdp_machine_vm_write((caddr_t)rq->data, (mach_vm_address_t)rq->address, rq->nbytes);
rp->error = KDPERR_ACCESS(rq->nbytes, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
}
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_writemem64(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_writemem64_req_t *rq = &pkt->writemem64_req;
size_t plen = *len;
kdp_writemem64_reply_t *rp = &pkt->writemem64_reply;
mach_vm_size_t cnt;
if (plen < sizeof (*rq))
return (FALSE);
if (rq->nbytes > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_writemem64 addr %llx size %d\n", rq->address, rq->nbytes));
cnt = kdp_machine_vm_write((caddr_t)rq->data, (mach_vm_address_t)rq->address, (mach_vm_size_t)rq->nbytes);
rp->error = KDPERR_ACCESS(rq->nbytes, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
}
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_writephysmem64(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_writephysmem64_req_t *rq = &pkt->writephysmem64_req;
size_t plen = *len;
kdp_writephysmem64_reply_t *rp = &pkt->writephysmem64_reply;
mach_vm_size_t cnt;
unsigned int size;
if (plen < sizeof (*rq))
return (FALSE);
size = rq->nbytes;
if (size > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_writephysmem64 addr %llx size %d\n", rq->address, size));
cnt = kdp_machine_phys_write(rq, rq->data, rq->lcpu);
rp->error = KDPERR_ACCESS(size, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
}
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_readmem(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_readmem_req_t *rq = &pkt->readmem_req;
size_t plen = *len;
kdp_readmem_reply_t *rp = &pkt->readmem_reply;
mach_vm_size_t cnt;
unsigned int size;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
size = rq->nbytes;
if (size > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_readmem addr %x size %d\n", rq->address, size));
cnt = kdp_machine_vm_read((mach_vm_address_t)rq->address, (caddr_t)rp->data, rq->nbytes);
rp->error = KDPERR_ACCESS(size, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
rp->hdr.len += cnt;
}
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_readmem64(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_readmem64_req_t *rq = &pkt->readmem64_req;
size_t plen = *len;
kdp_readmem64_reply_t *rp = &pkt->readmem64_reply;
mach_vm_size_t cnt;
unsigned int size;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
size = rq->nbytes;
if (size > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_readmem64 addr %llx size %d\n", rq->address, size));
cnt = kdp_machine_vm_read((mach_vm_address_t)rq->address, (caddr_t)rp->data, rq->nbytes);
rp->error = KDPERR_ACCESS(size, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
rp->hdr.len += cnt;
}
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_readphysmem64(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_readphysmem64_req_t *rq = &pkt->readphysmem64_req;
size_t plen = *len;
kdp_readphysmem64_reply_t *rp = &pkt->readphysmem64_reply;
mach_vm_size_t cnt;
unsigned int size;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
size = rq->nbytes;
if (size > MAX_KDP_DATA_SIZE)
rp->error = KDPERR_BAD_NBYTES;
else {
dprintf(("kdp_readphysmem64 addr %llx size %d\n", rq->address, size));
cnt = kdp_machine_phys_read(rq, rp->data, rq->lcpu);
rp->error = KDPERR_ACCESS(size, cnt);
dprintf((" cnt %lld error %d\n", cnt, rp->error));
rp->hdr.len += cnt;
}
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_maxbytes(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_maxbytes_req_t *rq = &pkt->maxbytes_req;
size_t plen = *len;
kdp_maxbytes_reply_t *rp = &pkt->maxbytes_reply;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_maxbytes\n"));
rp->max_bytes = MAX_KDP_DATA_SIZE;
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_version(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_version_req_t *rq = &pkt->version_req;
size_t plen = *len;
kdp_version_reply_t *rp = &pkt->version_reply;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_version\n"));
rp->version = KDP_VERSION;
if (!(kdp_flag & KDP_BP_DIS))
rp->feature = KDP_FEATURE_BP;
else
rp->feature = 0;
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_regions(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_regions_req_t *rq = &pkt->regions_req;
size_t plen = *len;
kdp_regions_reply_t *rp = &pkt->regions_reply;
kdp_region_t *r;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_regions\n"));
r = rp->regions;
rp->nregions = 0;
r->address = 0;
r->nbytes = 0xffffffff;
r->protection = VM_PROT_ALL; r++; rp->nregions++;
rp->hdr.len += rp->nregions * sizeof (kdp_region_t);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_writeregs(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_writeregs_req_t *rq = &pkt->writeregs_req;
size_t plen = *len;
int size;
kdp_writeregs_reply_t *rp = &pkt->writeregs_reply;
if (plen < sizeof (*rq))
return (FALSE);
size = rq->hdr.len - (unsigned)sizeof(kdp_hdr_t) - (unsigned)sizeof(unsigned int);
rp->error = kdp_machine_write_regs(rq->cpu, rq->flavor, rq->data, &size);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
static boolean_t
kdp_readregs(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_readregs_req_t *rq = &pkt->readregs_req;
size_t plen = *len;
kdp_readregs_reply_t *rp = &pkt->readregs_reply;
int size;
if (plen < sizeof (*rq))
return (FALSE);
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
rp->error = kdp_machine_read_regs(rq->cpu, rq->flavor, rp->data, &size);
rp->hdr.len += size;
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
boolean_t
kdp_breakpoint_set(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_breakpoint_req_t *rq = &pkt->breakpoint_req;
kdp_breakpoint_reply_t *rp = &pkt->breakpoint_reply;
size_t plen = *len;
kdp_error_t kerr;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_breakpoint_set %x\n", rq->address));
kerr = kdp_set_breakpoint_internal((mach_vm_address_t)rq->address);
rp->error = kerr;
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
boolean_t
kdp_breakpoint64_set(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_breakpoint64_req_t *rq = &pkt->breakpoint64_req;
kdp_breakpoint64_reply_t *rp = &pkt->breakpoint64_reply;
size_t plen = *len;
kdp_error_t kerr;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_breakpoint64_set %llx\n", rq->address));
kerr = kdp_set_breakpoint_internal((mach_vm_address_t)rq->address);
rp->error = kerr;
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
boolean_t
kdp_breakpoint_remove(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_breakpoint_req_t *rq = &pkt->breakpoint_req;
kdp_breakpoint_reply_t *rp = &pkt->breakpoint_reply;
size_t plen = *len;
kdp_error_t kerr;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_breakpoint_remove %x\n", rq->address));
kerr = kdp_remove_breakpoint_internal((mach_vm_address_t)rq->address);
rp->error = kerr;
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
boolean_t
kdp_breakpoint64_remove(
kdp_pkt_t *pkt,
int *len,
unsigned short *reply_port
)
{
kdp_breakpoint64_req_t *rq = &pkt->breakpoint64_req;
kdp_breakpoint64_reply_t *rp = &pkt->breakpoint64_reply;
size_t plen = *len;
kdp_error_t kerr;
if (plen < sizeof (*rq))
return (FALSE);
dprintf(("kdp_breakpoint64_remove %llx\n", rq->address));
kerr = kdp_remove_breakpoint_internal((mach_vm_address_t)rq->address);
rp->error = kerr;
rp->hdr.is_reply = 1;
rp->hdr.len = sizeof (*rp);
*reply_port = kdp.reply_port;
*len = rp->hdr.len;
return (TRUE);
}
kdp_error_t
kdp_set_breakpoint_internal(
mach_vm_address_t address
)
{
uint8_t breakinstr[MAX_BREAKINSN_BYTES], oldinstr[MAX_BREAKINSN_BYTES];
uint32_t breakinstrsize = sizeof(breakinstr);
mach_vm_size_t cnt;
int i;
kdp_machine_get_breakinsn(breakinstr, &breakinstrsize);
if(breakpoints_initialized == 0)
{
for(i=0;(i < MAX_BREAKPOINTS); breakpoint_list[i].address=0, i++);
breakpoints_initialized++;
}
cnt = kdp_machine_vm_read(address, (caddr_t)&oldinstr, (mach_vm_size_t)breakinstrsize);
if (0 == memcmp(oldinstr, breakinstr, breakinstrsize)) {
printf("A trap was already set at that address, not setting new breakpoint\n");
return KDPERR_BREAKPOINT_ALREADY_SET;
}
for(i=0;(i < MAX_BREAKPOINTS) && (breakpoint_list[i].address != 0); i++);
if (i == MAX_BREAKPOINTS) {
return KDPERR_MAX_BREAKPOINTS;
}
breakpoint_list[i].address = address;
memcpy(breakpoint_list[i].oldbytes, oldinstr, breakinstrsize);
breakpoint_list[i].bytesused = breakinstrsize;
cnt = kdp_machine_vm_write((caddr_t)&breakinstr, address, breakinstrsize);
return KDPERR_NO_ERROR;
}
kdp_error_t
kdp_remove_breakpoint_internal(
mach_vm_address_t address
)
{
mach_vm_size_t cnt;
int i;
for(i=0;(i < MAX_BREAKPOINTS) && (breakpoint_list[i].address != address); i++);
if (i == MAX_BREAKPOINTS)
{
return KDPERR_BREAKPOINT_NOT_FOUND;
}
breakpoint_list[i].address = 0;
cnt = kdp_machine_vm_write((caddr_t)&breakpoint_list[i].oldbytes, address, breakpoint_list[i].bytesused);
return KDPERR_NO_ERROR;
}
boolean_t
kdp_remove_all_breakpoints(void)
{
int i;
boolean_t breakpoint_found = FALSE;
if (breakpoints_initialized)
{
for(i=0;i < MAX_BREAKPOINTS; i++)
{
if (breakpoint_list[i].address)
{
kdp_machine_vm_write((caddr_t)&(breakpoint_list[i].oldbytes), (mach_vm_address_t)breakpoint_list[i].address, (mach_vm_size_t)breakpoint_list[i].bytesused);
breakpoint_found = TRUE;
breakpoint_list[i].address = 0;
}
}
if (breakpoint_found)
printf("kdp_remove_all_breakpoints: found extant breakpoints, removing them.\n");
}
return breakpoint_found;
}
boolean_t
kdp_reboot(
__unused kdp_pkt_t *pkt,
__unused int *len,
__unused unsigned short *reply_port
)
{
dprintf(("kdp_reboot\n"));
kdp_machine_reboot();
return (TRUE); // no, not really, we won't return
}