static int shutdown_process(void *__unused)
{
static char *envp[] = { "HOME=/", "TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
static char *poweroff_argv[] = { "/sbin/poweroff", NULL };
#ifdef CONFIG_XEN
extern asmlinkage long sys_reboot(int magic1, int magic2,
unsigned int cmd, void *arg);
#endif
if ((shutting_down == SHUTDOWN_POWEROFF) ||
(shutting_down == SHUTDOWN_HALT)) {
if (call_usermodehelper("/sbin/poweroff", poweroff_argv,
envp, 0) < 0) {
#ifdef CONFIG_XEN
sys_reboot(LINUX_REBOOT_MAGIC1,
LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_POWER_OFF,
NULL);
#endif /* CONFIG_XEN */
}
}
shutting_down = SHUTDOWN_INVALID; /* could try again */
return 0;
}
void
// do_upgrade_cgi(char *url, FILE *stream)
do_upgrade_cgi(struct mime_handler *handler, char *url, webs_t streamm, char *query) // jimmy,
// https,
// 8/6/2003
{
#ifndef ANTI_FLASH
fprintf(stderr, "do post\n");
if (upgrade_ret)
do_ej(handler, "Fail_u_s.asp", stream, NULL);
else
do_ej(handler, "Success_u_s.asp", stream, NULL);
fprintf(stderr, "websdone\n");
websDone(stream, 200);
fprintf(stderr, "reboot\n");
/*
* Reboot if successful
*/
if (upgrade_ret == 0) {
sleep(5);
sys_reboot();
}
#else
do_ej(handler, "Fail_u_s.asp", stream, NULL);
websDone(stream, 200);
#endif
}
void geo_check_master_reset( void )
{
// Read reset messages from master
can_fullcan_msg_t *can_rst_msg_ptr = NULL;
can_fullcan_msg_t can_rst_msg;
rst_msg *geo_rst_msg;
can_rst_msg_ptr = CAN_fullcan_get_entry_ptr(can_id_rst);
bool status = CAN_fullcan_read_msg_copy(can_rst_msg_ptr, &can_rst_msg);
if( !status )
return; // There is no reset message
LE.off(GEO_CAN_ERR_LED);
geo_rst_msg = (rst_msg *)&(can_rst_msg.data.bytes[0]);
if( geo_rst_msg->reset_geo == RESET )
{
LOG_ERROR("ERROR!!! Received a reset request from master\n");
sys_reboot();
}
}
void main()
{
unsigned char *data;
allocDoubleBuffer_vbe();
sys_VBEstart();
SCREEN =sys_giveSCREEN();
allocDoubleBuffer_vbe();
memset(SCREEN, 10, 1024*768*4);
OSMesaContext gl_ctx = OSMesaCreateContext(OSMESA_BGRA, NULL);
if(!OSMesaMakeCurrent(gl_ctx, DOUBLEBUFFER_vbe, GL_UNSIGNED_BYTE, 1024,768))
sys_reboot();
OSMesaPixelStore(OSMESA_Y_UP, 0);
reshape(1024,768);
init();
int i;
for(i = 0; i < 20000; i++)
{
angle += 6;
draw();
SwapBuffers_vbe();
}
fps();
}
void vApplicationMallocFailedHook( void )
{
u0_dbg_put("HALTING SYSTEM: Your system ran out of memory (RAM)!\n");
delay_us(3000 * 1000);
sys_reboot();
}
/**
* This is called from the HardFault_HandlerAsm with a pointer the Fault stack as the parameter.
* We can then read the values from the stack and place them into local variables for ease of reading.
* We then read the various Fault Status and Address Registers to help decode cause of the fault.
* The function ends with a BKPT instruction to force control back into the debugger
*/
void isr_hard_fault_handler(unsigned long *hardfault_args)
{
volatile unsigned int stacked_r0 ;
volatile unsigned int stacked_r1 ;
volatile unsigned int stacked_r2 ;
volatile unsigned int stacked_r3 ;
volatile unsigned int stacked_r12 ;
volatile unsigned int stacked_lr ;
volatile unsigned int stacked_pc ;
volatile unsigned int stacked_psr ;
stacked_r0 = ((unsigned long)hardfault_args[0]) ;
stacked_r1 = ((unsigned long)hardfault_args[1]) ;
stacked_r2 = ((unsigned long)hardfault_args[2]) ;
stacked_r3 = ((unsigned long)hardfault_args[3]) ;
stacked_r12 = ((unsigned long)hardfault_args[4]) ;
stacked_lr = ((unsigned long)hardfault_args[5]) ;
stacked_pc = ((unsigned long)hardfault_args[6]) ;
stacked_psr = ((unsigned long)hardfault_args[7]) ;
FAULT_EXISTS = FAULT_PRESENT_VAL;
FAULT_PC = stacked_pc;
FAULT_LR = stacked_lr - 1;
FAULT_PSR = stacked_psr;
sys_reboot();
/* Prevent compiler warnings */
(void) stacked_r0 ;
(void) stacked_r1 ;
(void) stacked_r2 ;
(void) stacked_r3 ;
(void) stacked_r12 ;
}
int main(int argc, char *argv[])
{
const char *cmd = "";
if(argc > 1) {
cmd = argv[1];
}
sys_reboot(cmd);
}
void vApplicationStackOverflowHook( TaskHandle_t *pxTask, char *pcTaskName )
{
u0_dbg_put("HALTING SYSTEM: Stack overflow by task: ");
u0_dbg_put((char*)pcTaskName);
u0_dbg_put("\nTry increasing stack memory of this task.\n");
delay_us(3000 * 1000);
sys_reboot();
}
/*
* Command for shutting down.
*/
static
int cmd_quit(int nargs, char **args) {
(void) nargs;
(void) args;
vfs_sync();
sys_reboot(RB_POWEROFF);
thread_exit();
return 0;
}
/*
* Command for shutting down.
*/
static
int
cmd_quit(int nargs, char **args)
{
(void)nargs;
(void)args;
vfs_sync();
sys_reboot(RB_POWEROFF);
#if OPT_A2
thread_exit(0);
#endif /* OPT_A2 */
return 0;
}
void scheduler_start(bool register_internal_tlm)
{
/* If no failure, start the FreeRTOS scheduler */
if (!scheduler_init_all(register_internal_tlm)) {
puts("Starting scheduler ...");
vTaskStartScheduler();
// vTaskStartScheduler() should not return
puts("ERROR: Someone killed the scheduler");
}
else {
puts("ERROR: Refusing to start OS scheduler due to error(s)");
delay_ms(3000);
sys_reboot();
}
}
static void wdog_cmsdk_apb_isr(void)
{
/*
* Check if the watchdog was the reason of the NMI interrupt
* and if not, exit immediately
*/
if (!wdog_cmsdk_apb_has_fired()) {
printk("NMI received! Rebooting...\n");
/* In ARM implementation sys_reboot ignores the parameter */
sys_reboot(0);
} else {
if (user_cb != NULL) {
user_cb(wdog_r, 0);
}
}
}
void start_sysinit(void)
{
char buf[PATH_MAX];
struct stat tmp_stat;
time_t tm = 0;
cprintf("sysinit() proc\n");
/*
* /proc
*/
mknod("/dev/mmc",S_IFBLK|0660,makedev(126,0));
mknod("/dev/mmc0",S_IFBLK|0660,makedev(126,1));
mknod("/dev/mmc1",S_IFBLK|0660,makedev(126,2));
mknod("/dev/mmc2",S_IFBLK|0660,makedev(126,3));
mknod("/dev/mmc3",S_IFBLK|0660,makedev(126,4));
mkdir("/dev/mtd",0700);
mknod("/dev/mtd/0",S_IFCHR|0644,makedev(90,0));
mknod("/dev/mtd/0ro",S_IFCHR|0644,makedev(90,1));
mknod("/dev/mtd/1",S_IFCHR|0644,makedev(90,2));
mknod("/dev/mtd/1ro",S_IFCHR|0644,makedev(90,3));
mknod("/dev/mtd/2",S_IFCHR|0644,makedev(90,4));
mknod("/dev/mtd/2ro",S_IFCHR|0644,makedev(90,5));
mknod("/dev/mtd/3",S_IFCHR|0644,makedev(90,6));
mknod("/dev/mtd/3ro",S_IFCHR|0644,makedev(90,7));
mknod("/dev/mtd/4",S_IFCHR|0644,makedev(90,8));
mknod("/dev/mtd/4ro",S_IFCHR|0644,makedev(90,9));
cprintf("sysinit() setup console\n");
/*
* Setup console
*/
cprintf("sysinit() klogctl\n");
klogctl(8, NULL, atoi(nvram_safe_get("console_loglevel")));
cprintf("sysinit() get router\n");
/*
* load some netfilter stuff
*/
#ifndef HAVE_WP54G
#ifndef HAVE_NP28G
insmod("nf_conntrack_ftp");
insmod("nf_conntrack_irc");
insmod("nf_conntrack_netbios_ns");
insmod("nf_conntrack_pptp");
insmod("nf_conntrack_proto_gre");
insmod("nf_conntrack_proto_udplite");
insmod("nf_conntrack_tftp");
insmod("xt_CLASSIFY");
insmod("xt_MARK");
insmod("xt_TCPMSS");
insmod("xt_length");
insmod("xt_limit");
insmod("xt_multiport");
insmod("xt_pkttype");
insmod("xt_state");
insmod("xt_tcpmss");
insmod("xt_u32");
insmod("iptable_filter");
insmod("iptable_mangle");
insmod("nf_nat");
insmod("iptable_nat");
insmod("nf_nat_ftp");
insmod("nf_nat_irc");
insmod("nf_nat_pptp");
insmod("nf_nat_proto_gre");
insmod("nf_nat_tftp");
insmod("ipt_LOG");
insmod("ipt_MASQUERADE");
insmod("ipt_REDIRECT");
insmod("ipt_REJECT");
insmod("ipt_ULOG");
insmod("ipt_TRIGGER");
insmod("ipt_iprange");
insmod("ipt_ipp2p");
insmod("ipt_layer7");
insmod("ipt_webstr");
// ppp drivers
insmod("slhc");
insmod("ppp_generic");
insmod("ppp_async");
insmod("ppp_synctty");
insmod("ppp_mppe_mppc");
insmod("pppox");
insmod("pppoe");
#endif
#endif
insmod("adm5120_wdt");
insmod("adm5120sw");
if (getRouterBrand() != ROUTER_BOARD_WP54G
&& getRouterBrand() != ROUTER_BOARD_NP28G) {
unsigned char mac[6];
char eabuf[32];
char mtdpath[32];
memset(mac, 0, 6);
FILE *fp;
int mtd = getMTD("boot");
int foundmac = 0;
sprintf(mtdpath, "/dev/mtdblock/%d", mtd);
fp = fopen(mtdpath, "rb");
if (fp != NULL) {
//check for osbridge
fseek(fp, 0xff90 - 2, SEEK_SET);
unsigned char os[32];
fread(os, 32, 1, fp);
if (strcmp(os, "OSBRiDGE 5XLi") == 0) {
foundmac = 1;
fprintf(stderr, "found OSBRiDGE 5XLi\n");
nvram_set("DD_BOARD", "OSBRiDGE 5LXi");
fseek(fp, 0xff82, SEEK_SET);
fread(os, 12, 1, fp);
int i;
int count = 0;
if (memcmp(os, "0050fc488130", 12) == 0) {
//force change mac
fclose(fp);
start_change_mac();
sys_reboot();
}
for (i = 0; i < 6; i++) {
mac[i] = toNumeric(os[count++]) * 16;
mac[i] |= toNumeric(os[count++]);
}
struct ifreq ifr;
int s;
if ((s =
socket(AF_INET, SOCK_RAW, IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0", IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
memcpy((unsigned char *)ifr.ifr_hwaddr.
sa_data, mac, 6);
ioctl(s, SIOCSIFHWADDR, &ifr);
close(s);
}
if ((s =
socket(AF_INET, SOCK_RAW, IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0", IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
nvram_set("et0macaddr_safe",
ether_etoa((unsigned char *)
ifr.
ifr_hwaddr.sa_data,
eabuf));
nvram_set("et0macaddr",
ether_etoa((unsigned char *)
ifr.
ifr_hwaddr.sa_data,
eabuf));
close(s);
}
}
if (!foundmac) {
int s = searchfor(fp, "mgmc", 0x20000 - 5);
if (s != -1) {
fread(mac, 6, 1, fp);
struct ifreq ifr;
int s;
foundmac = 1;
fprintf(stderr, "found Tonze-AP120\n");
if ((s =
socket(AF_INET, SOCK_RAW,
IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0",
IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
memcpy((unsigned char *)
ifr.ifr_hwaddr.sa_data,
mac, 6);
ioctl(s, SIOCSIFHWADDR, &ifr);
close(s);
}
if ((s =
socket(AF_INET, SOCK_RAW,
IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0",
IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
nvram_set("et0macaddr_safe",
ether_etoa((unsigned
char *)
ifr.ifr_hwaddr.sa_data, eabuf));
nvram_set("et0macaddr",
ether_etoa((unsigned
char *)
ifr.ifr_hwaddr.sa_data, eabuf));
close(s);
}
}
}
if (foundmac == 0) {
fprintf(stderr,
"error: no valid mac address found for eth0\n");
}
fclose(fp);
}
} else {
struct mylo_board_params params;
char mtdpath[32];
FILE *fp;
int mtd = getMTD("boot");
int foundmac = 0;
struct ifreq ifr;
int s;
char eabuf[32];
sprintf(mtdpath, "/dev/mtdblock/%d", mtd);
fp = fopen(mtdpath, "rb");
if (fp != NULL) {
fseek(fp, 0xf800, SEEK_SET);
fread(¶ms, sizeof(params), 1, fp);
fclose(fp);
if (params.magic == 0x20021103) {
fprintf(stderr, "Found compex board magic!\n");
if ((s =
socket(AF_INET, SOCK_RAW, IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0", IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
memcpy((unsigned char *)ifr.ifr_hwaddr.
sa_data, params.addr[0].mac, 6);
ioctl(s, SIOCSIFHWADDR, &ifr);
close(s);
}
if ((s =
socket(AF_INET, SOCK_RAW, IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth1", IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
memcpy((unsigned char *)ifr.ifr_hwaddr.
sa_data, params.addr[1].mac, 6);
ioctl(s, SIOCSIFHWADDR, &ifr);
close(s);
}
if ((s =
socket(AF_INET, SOCK_RAW, IPPROTO_RAW))) {
strncpy(ifr.ifr_name, "eth0", IFNAMSIZ);
ioctl(s, SIOCGIFHWADDR, &ifr);
nvram_set("et0macaddr_safe",
ether_etoa((unsigned char *)
ifr.
ifr_hwaddr.sa_data,
eabuf));
nvram_set("et0macaddr",
ether_etoa((unsigned char *)
ifr.
ifr_hwaddr.sa_data,
eabuf));
close(s);
}
}
}
}
/*
* network drivers
*/
detect_wireless_devices();
if (!nvram_match("disable_watchdog", "1"))
eval("watchdog");
#ifdef HAVE_WP54G
writeproc("/proc/sys/dev/wifi0/ledpin","6");
writeproc("/proc/sys/dev/wifi0/softled","1");
#endif
/*
* Set a sane date
*/
stime(&tm);
nvram_set("wl0_ifname", "ath0");
return;
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
/* note the casts to userptr_t */
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
/* process calls */
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_execv:
err = sys_execv(
(userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
case SYS__exit:
sys__exit(tf->tf_a0);
panic("Returning from exit\n");
case SYS_waitpid:
err = sys_waitpid(
tf->tf_a0,
(userptr_t)tf->tf_a1,
tf->tf_a2,
&retval);
break;
case SYS_getpid:
err = sys_getpid(&retval);
break;
/* file calls */
case SYS_open:
err = sys_open(
(userptr_t)tf->tf_a0,
tf->tf_a1,
tf->tf_a2,
&retval);
break;
case SYS_dup2:
err = sys_dup2(
tf->tf_a0,
tf->tf_a1,
&retval);
break;
case SYS_close:
err = sys_close(tf->tf_a0);
break;
case SYS_read:
err = sys_read(
tf->tf_a0,
(userptr_t)tf->tf_a1,
tf->tf_a2,
&retval);
break;
case SYS_write:
err = sys_write(
tf->tf_a0,
(userptr_t)tf->tf_a1,
tf->tf_a2,
&retval);
break;
case SYS_lseek:
{
/*
* Because the position argument is 64 bits wide,
* it goes in the a2/a3 registers and we have to
* get "whence" from the stack. Furthermore, the
* return value is 64 bits wide, so the extra
* part of it goes in the v1 register.
*
* This is a trifle messy.
*/
uint64_t offset;
int whence;
off_t retval64;
join32to64(tf->tf_a2, tf->tf_a3, &offset);
err = copyin((userptr_t)tf->tf_sp + 16,
&whence, sizeof(int));
if (err) {
break;
}
err = sys_lseek(tf->tf_a0, offset, whence, &retval64);
if (err) {
break;
}
split64to32(retval64, &tf->tf_v0, &tf->tf_v1);
retval = tf->tf_v0;
}
break;
case SYS_chdir:
err = sys_chdir((userptr_t)tf->tf_a0);
break;
case SYS___getcwd:
err = sys___getcwd(
(userptr_t)tf->tf_a0,
tf->tf_a1,
&retval);
break;
/* Even more system calls will go here */
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}
void
mips_syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
assert(curspl==0);
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
callno=tf->tf_v0;
char ch;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS__exit:
thread_exit();
break;
/* Add stuff here */
/*calls for assignment 0*/
case SYS__helloworld:
//err = sys_helloworld(tf->tf_a0);
break;
case SYS__printint:
//err=sys_printint(tf->tf_a0,tf->tf_a1);
break;
case SYS_getpid:
err=sys_getpid(&retval);
break;
case SYS__printchar:
err=sys_printchar(tf->tf_a0);
break;
case SYS__readchar:
err=sys_readchar(&ch);
//kprintf("\nin syscall::%c",ch);
break;
case SYS_fork:
//kprintf("\n ::current addr space::%x",curthread->t_vmspace);
err=sys_fork(tf,curthread->t_vmspace);
break;
case SYS_execv:
err=sys_execv(tf->tf_a0,tf->tf_a1);
//(const char *prog, char *const *args);
//prog points to a const string, const char pointer pointing to a const string
break;
default:
kprintf("Unknown syscall %d\n", callno);
//kprintf("\ncallno::%d",tf->tf_v0);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
if(callno==SYS__readchar){
tf->tf_v0=ch;
tf->tf_a0=0;
}
else{
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
assert(curspl==0);
//kprintf("Exiting mips_syscall\n");
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
/* ASST2: These implementations of read and write only work for
* console I/O (stdin, stdout and stderr file descriptors)
*/
case SYS_read:
err = sys_read(tf->tf_a0, (userptr_t)tf->tf_a1, tf->tf_a2,
&retval);
break;
case SYS_write:
err = sys_write(tf->tf_a0, (userptr_t)tf->tf_a1, tf->tf_a2,
&retval);
break;
/* process calls */
case SYS__exit:
thread_exit(_MKWAIT_EXIT(tf->tf_a0));
panic("Returning from exit\n");
case SYS_fork:
err = sys_fork(tf, &retval);
break;
/* ASST2 - You need to fill in the code for each of these cases */
case SYS_getpid:
err = sys_getpid(&retval);
break;
case SYS_waitpid:
if(sys_waitpid(tf->tf_a0, \
(userptr_t)tf->tf_a1, tf->tf_a2, &retval) == -1)
{
err=retval;
}
else{
err=0;
}
break;
case SYS_kill:
err = sys_kill(tf->tf_a0, tf->tf_a1);
break;
/* Even more system calls will go here */
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}
void
mips_syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
assert(curspl==0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
DEBUG(DB_SYSCALL, "The syscall number is %d\n", callno);
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
/* Add stuff here */
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
assert(curspl==0);
}
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
uint32_t v0, v1;
off_t pos;
int whence;
//userptr_t *status;
struct stat statbuf;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1); /* the syscall ov*/
break;
case SYS_open:
err = sys_open((const_userptr_t)tf->tf_a0, tf->tf_a1, (mode_t)tf ->tf_a2, &retval);
break;
case SYS_close:
err = sys_close((tf->tf_a0),&retval);
break;
case SYS_read:
err = sys_read(tf->tf_a0, (userptr_t)tf->tf_a1, (size_t)tf -> tf_a2, &retval);
//retval = (int32_t)bytes;
break;
case SYS_write:
err = sys_write(tf->tf_a0, (userptr_t)tf->tf_a1, (size_t)tf -> tf_a2, &retval);
//retval = (int32_t)bytes;
break;
case SYS_lseek:
pos = tf->tf_a2;
pos = pos << 32;
pos += tf -> tf_a3;
err = copyin((const_userptr_t)tf->tf_sp+16,&whence,sizeof(int));
if(err)
{
break;
}
err = sys_lseek(tf->tf_a0, pos, whence, &v0, &v1);
if(err)
{
break;
}
retval = v0;
tf->tf_v1 = v1;
break;
case SYS__exit:
sys__exit(tf->tf_a0);
// We are only here because of one of 2 reasons. We tried to kill the initial thread
// while there was/were (an) immediate child(ren) of it running.
// *NOTE* I'm actually NOT sure if that's a valid reason to be here
// Second reason? Something went horribly, horribly wrong
err = 0;
break;
case SYS_dup2:
err = sys_dup2(tf->tf_a0,tf->tf_a1,&retval);
break;
case SYS_fstat:
err = sys_fstat(tf->tf_a0, &statbuf);
break;
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_getpid:
err = sys_getpid(&retval);
break;
case SYS_waitpid:
err = sys_waitpid(tf->tf_a0, (int*)tf->tf_a1, (int)tf->tf_a2, &retval);
break;
case SYS___getcwd:
err = sys___getcwd((char*)tf->tf_a0,(size_t)tf->tf_a1,&retval);
break;
case SYS_chdir:
err = sys_chdir((char*)tf->tf_a0,&retval);
break;
case SYS_execv:
err = sys_execv((const char*)tf->tf_a0, (char**)tf->tf_a1);
break;
case SYS_sbrk:
err = sbrk((int)tf->tf_a0,&retval);
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}
/*********************************************************************** F* Function: static int process_mon_chains(void) P*A*Z* * P* Parameters: none P* P* Returnvalue: int P* - 0 if the function returns at all * Z* Intention: This is the core function of the chain functionality. Z* The list with the monitored chain is processed and Z* expired entries handled appropriately by stepping up Z* the escalation ladder. The escalation actions are Z* triggered from here. * D* Design: [email protected] C* Coding: [email protected] V* Verification: [email protected] ***********************************************************************/ static int process_mon_chains(void) { struct list_head *ptr; monitored_chain_t *entry; int sig; spin_lock(&mon_lock); for (ptr = mon_list.next; ptr != &mon_list; ptr = ptr->next) { entry = list_entry(ptr, monitored_chain_t, list); if (time_after_eq(jiffies, entry->expires)) { debugk("%s: WD monitor expired for id %d\n", __FUNCTION__, entry->chainid); switch (entry->action[entry->escalation]) { case WD_ACTION_SIGNAL: debugk("WD: sending user signal for key " "%d...\n", entry->chainid); sig = (entry->signal) ? entry->signal : SIGTERM; if (entry->pid) kill_proc_info(sig, SEND_SIG_PRIV, entry->pid); break; case WD_ACTION_KILL: debugk("WD: sending KILL signal for key " "%d...\n", entry->chainid); if (entry->pid) kill_proc_info(SIGKILL, SEND_SIG_PRIV, entry->pid); break; case WD_ACTION_REBOOT: spin_unlock(&mon_lock); wd_unregister_mon_chain(entry->chainid); printk("WD: Rebooting system for key " "%d...\n", entry->chainid); flush_cache_all(); /* * XXX This is not safe to call in interrupt * context. */ sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART, NULL); break; case WD_ACTION_RESET: printk("WD: Resetting system for key " "%d...\n", entry->chainid); BUG_ON(wd_hw_functions.wd_machine_restart == NULL); wd_hw_functions.wd_machine_restart(); break; default: debugk("WD: undefined action %d\n", entry->action[entry->escalation]); break; } entry->escalation++; entry->expires = jiffies + HZ * entry->timer_count[entry->escalation]; list_del(&entry->list); insert_mon_chain(entry); } else /* The list is sorted, so we can stop here */ break; } spin_unlock(&mon_lock); return 0; }
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception-*.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void syscall(struct trapframe *tf) {
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
off_t pos, new_pos;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t) tf->tf_a0, (userptr_t) tf->tf_a1);
break;
case SYS_open:
err = sys_open((userptr_t) tf->tf_a0, (int) tf->tf_a1,
(int) tf->tf_a2, &retval);
break;
case SYS_read:
err = sys_read((int) tf->tf_a0, (userptr_t) tf->tf_a1,
(int) tf->tf_a2, &retval);
break;
case SYS_write:
err = sys_write((int) tf->tf_a0, (userptr_t) tf->tf_a1,
(int) tf->tf_a2, &retval);
break;
case SYS_lseek:
pos = (((off_t)tf->tf_a2 << 32) | tf->tf_a3);
err = sys_lseek((userptr_t) tf->tf_a0, pos,
(userptr_t)(tf->tf_sp+16), &new_pos);
if (err == 0)
{
retval = (int32_t)(new_pos >> 32);
tf->tf_v1 = (int32_t)(new_pos & 0xFFFFFFFF);
}
break;
case SYS_close:
err = sys_close((userptr_t) tf->tf_a0, &retval);
break;
case SYS_dup2:
err = sys_dup2((userptr_t) tf->tf_a0, (userptr_t) tf->tf_a1, &retval);
break;
case SYS_getpid:
err = sys_getpid(&retval);
break;
case SYS_sbrk:
err = sys_sbrk((userptr_t)tf->tf_a0, &retval);
break;
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_execv:
err = sys_execv((userptr_t) tf->tf_a0, (userptr_t) tf->tf_a1, &retval);
retval = 0;
break;
case SYS_waitpid:
err = sys_waitpid((userptr_t) tf->tf_a0, (userptr_t) tf->tf_a1,
(userptr_t) tf->tf_a2, &retval);
break;
case SYS__exit:
//kprintf("TEMPPPP:Exit has been called! \n");
err = sys__exit((int) tf->tf_a0);
break;
/* Add stuff here */
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
/*********************************************************************** F* Function: static int process_mon_chains(void) P*A*Z* * P* Parameters: none P* P* Returnvalue: int P* - 0 if the function returns at all * Z* Intention: This is the core function of the chain functionality. Z* The list with the monitored chain is processed and Z* expired entries handled appropriately by stepping up Z* the escalation ladder. The escalation actions are Z* triggered from here. * D* Design: [email protected] C* Coding: [email protected] V* Verification: [email protected] ***********************************************************************/ static int process_mon_chains(void) { struct list_head *ptr; monitored_chain_t *entry; int sig; spin_lock(&mon_lock); for (ptr=mon_list.next; ptr!=&mon_list; ptr=ptr->next) { entry=list_entry(ptr, monitored_chain_t, list); if (entry->expires<=jiffies) { debugk("%s: WDT8xx monitor expired for id %d\n", __FUNCTION__, entry->chainid); switch (entry->action[entry->escalation]) { case WDT_MPC8XX_ACTION_SIGNAL: debugk("WDT_8xx: sending user signal for key %d...\n", entry->chainid); sig=(entry->signal)?entry->signal:SIGTERM; if (entry->pid) kill_proc(entry->pid, sig, 1); break; case WDT_MPC8XX_ACTION_KILL: debugk("WDT_8xx: sending KILL signal for key %d...\n", entry->chainid); if (entry->pid) kill_proc(entry->pid, SIGKILL, 1); break; case WDT_MPC8XX_ACTION_REBOOT: spin_unlock(&mon_lock); wdt_mpc8xx_unregister_mon_chain(entry->chainid); printk("WDT_8xx: Rebooting system for key %d...\n", entry->chainid); sync(); sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART, NULL); break; case WDT_MPC8XX_ACTION_RESET: printk("WDT_8xx: Resetting system for key %d...\n", entry->chainid); #ifdef CONFIG_8xx m8xx_restart (NULL); #else machine_restart (NULL); #endif break; default: debugk("WDT_8xx: undefined action %d\n", entry->action[entry->escalation]); break; } entry->escalation++; entry->expires=jiffies + HZ * entry->timer_count[entry->escalation]; list_del(&entry->list); insert_mon_chain(entry); } else /* The list is sorted, so we can stop here */ break; } spin_unlock(&mon_lock); return(0); }
void
nas_reset_board()
{
sys_reboot();
return;
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception-*.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(void *trapframe, unsigned long junk)
{
curproc->rt = (curproc->rt == BACKGROUND_U ? BACKGROUND_K : INTERACTIVE_K);
(void)junk;
struct trapframe *tf = (struct trapframe*)trapframe;
if(!curproc->context)
curproc->context = kmalloc(sizeof(struct trapframe));
memcpy(curproc->context, tf, sizeof(struct trapframe));
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
/* Add stuff here */
case SYS__exit:
_exit((int)tf->tf_a0);
break;
case SYS_chdir:
err = chdir((const char*)tf->tf_a0);
break;
case SYS_close:
err = close((int)tf->tf_a0,
&retval);
break;
case SYS_dup2:
err = dup2((int)tf->tf_a0,
(int)tf->tf_a1,
&retval);
break;
case SYS_execv:
err = execv((const char*)tf->tf_a0,
(char **)tf->tf_a1);
break;
case SYS_fork:
err = fork(&retval);
break;
case SYS___getcwd:
err = __getcwd((char*)tf->tf_a0,
(size_t)tf->tf_a1,
&retval);
break;
case SYS_getpid:
err = getpid(&retval);//always return 0
break;
case SYS_lseek:
err = lseek((int)tf->tf_a0,
(off_t)(tf->tf_a1 | tf->tf_a2),
(int)tf->tf_a3,
(off_t*)&retval);
break;
case SYS_open:
err = open((const char*)tf->tf_a0,
(int)tf->tf_a1,
&retval);
break;
case SYS_read:
err = read((int)tf->tf_a0,
(void*)tf->tf_a1,
(size_t)tf->tf_a2,
&retval);
break;
case SYS_waitpid:
err = waitpid((pid_t)tf->tf_a0,
(int *)tf->tf_a1,
(int)tf->tf_a2,
&retval);
break;
case SYS_write:
err = write((int)tf->tf_a0,
(userptr_t)tf->tf_a1,
(size_t)tf->tf_a2,
&retval);
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
curproc->rt = (curproc->rt == BACKGROUND_K ? BACKGROUND_U : INTERACTIVE_U);
}
void
mips_syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
assert(curspl==0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS_write:
err = sys_write(tf->tf_a0, (void *) tf->tf_a1, (size_t) tf->tf_a2, &retval);
break;
case SYS_read:
err = sys_read(tf->tf_a0, (void *) tf->tf_a1, (size_t) tf->tf_a2, &retval);
break;
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_getpid:
retval = sys_getpid();
err = 0;
break;
case SYS_waitpid:
err = sys_waitpid((pid_t) tf->tf_a0, (int *) tf->tf_a1, 0, &retval);
break;
case SYS__exit:
sys_exit(tf->tf_a0);
break;
/* Add stuff here */
// case SYS_execv:
// sys_execv((char *) tf->tf_a0, (char **) tf->tf_a1, (int*) tf->tf_a2);
// break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
// kprintf("Here\/**/n");
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
assert(curspl==0);
}
void
mips_syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
assert(curspl==0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS_getpid:
retval = ((int32_t)sys_getpid());
err=retval;
break;
case SYS_waitpid:
//just passing the the first arg from users waitpid
err = (sys_waitpid(tf->tf_a0,&retval,0));
break;
case SYS__exit:
retval = ((int32_t)sys__exit());
err=retval;
break;
case SYS_fork:
//http://jhshi.me/2012/03/21/os161-how-to-add-a-system-call/
err = ((int32_t)sys_fork(tf));
break;
case SYS_execv:
break;
case SYS_read:
//err = ((int32_t)sys_read(tf->tf_a0,(userptr_t)tf->tf_a1,tf->tf_a2)); //original
err = ((int32_t)sys_read(tf->tf_a0,(char*)tf->tf_a1,tf->tf_a2));
break;
case SYS_write:
err = ((int32_t)sys_write(tf->tf_a0,(char*)tf->tf_a1,tf->tf_a2));
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
assert(curspl==0);
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err = 0;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
/* Add stuff here */
case SYS_read:
err = sys_read((int)tf->tf_a0, // filehandle
(void*)tf->tf_a1, // buffer
(size_t)tf->tf_a2, // size
&retval); // return value
break;
case SYS_write:
err = sys_write((int)tf->tf_a0, // filehandle
(const void*)tf->tf_a1, // buffer
(size_t)tf->tf_a2, // size
&retval); // return value
break;
case SYS_open:
err = sys_open((const char*)tf->tf_a0, // filename
(int)tf->tf_a1, // flags
&retval); // return value
break;
case SYS_close:
err = sys_close((int)tf->tf_a0); // filehandle
break;
case SYS_dup2:
err = sys_dup2((int)tf->tf_a0, // old_filehandle
(int)tf->tf_a1, // new_filehandle
&retval); // return value
break;
case SYS__exit:
sys_exit((int)tf->tf_a0); // exitcode
break;
case SYS_getpid:
retval = sys_getpid(); // exitcode
break;
case SYS_waitpid:
err = sys_waitpid((pid_t)tf->tf_a0, (int*)tf->tf_a1, tf->tf_a2, &retval);
break;
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_execv:
err = sys_execv((userptr_t)tf->tf_a0, (userptr_t)tf->tf_a1);
break;
case SYS_sbrk:
err = sys_sbrk((intptr_t)tf->tf_a0, &retval);
break;
case SYS_lseek: {
off_t offset = tf->tf_a2;
offset = offset<<32;
offset = offset|tf->tf_a3;
int whence;
int err_copyin = copyin((userptr_t)tf->tf_sp+16,&whence,sizeof(whence));
if (err_copyin) {
break;
}
off_t retoffset;
err = sys_lseek((int)tf->tf_a0, // filehandle
offset, // desired offset
whence,
&retoffset); // return value
if (!err) {
retval = retoffset>>32;
tf->tf_v1 = retoffset;
}
break;
} break;
case SYS___getcwd:
err = sys___getcwd((char*)tf->tf_a0, // buffer
(size_t)tf->tf_a1, // size
&retval); // return value
break;
case SYS_chdir:
err = sys_chdir((char*)tf->tf_a0); // path
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
//kprintf("Starting syscall\n");
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
#ifdef UW
case SYS_write:
err = sys_write((int)tf->tf_a0,
(userptr_t)tf->tf_a1,
(int)tf->tf_a2,
(int *)(&retval));
break;
case SYS__exit:
sys__exit((int)tf->tf_a0);
/* sys__exit does not return, execution should not get here */
panic("unexpected return from sys__exit");
break;
case SYS_getpid:
err = sys_getpid((pid_t *)&retval);
break;
case SYS_waitpid:
err = sys_waitpid((pid_t)tf->tf_a0,
(userptr_t)tf->tf_a1,
(int)tf->tf_a2,
(pid_t *)&retval);
break;
case SYS_fork:
err = sys_fork(tf, (pid_t *)&retval);
break;
case SYS_execv:
err=sys_execv((char *)tf->tf_a0, (char **) tf->tf_a1);
break;
#endif // UW
/* Add stuff here */
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
//F*****G A2
case SYS_write:
err=write(tf->tf_a0,(void*)tf->tf_a1,tf->tf_a2);
break;
/* Add stuff here */
case SYS_open:
break;
case SYS_close:
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}
/**
* SPB & FAR
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno, err;
int32_t retval;
off_t pos = 0;
off_t lsret;
int whence;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0, (userptr_t)tf->tf_a1);
break;
case SYS_open:
err = sys_open((const char*)tf->tf_a0, tf->tf_a1, &retval);
break;
case SYS_read:
err = sys_read((int)tf->tf_a0,(void*)tf->tf_a1,(size_t)tf->tf_a2,&retval);
break;
case SYS_write:
err = sys_write((int)tf->tf_a0,(const void*)tf->tf_a1,(size_t)tf->tf_a2,&retval);
break;
case SYS_close:
err = sys_close((int)tf->tf_a0, &retval);
break;
case SYS_lseek:
pos |= (off_t)tf->tf_a2;
pos <<= 32; //puts a2 and a3 into one var.
pos |= (off_t)tf->tf_a3;
err = copyin((const userptr_t)tf->tf_sp+16, &whence, sizeof(whence));
if (err)
break;
err = sys_lseek((int)tf->tf_a0, pos, (int)whence, &lsret);
if(!err){
retval = lsret>>32;
tf->tf_v1 = lsret;
}
break;
case SYS_dup2:
err = sys_dup2((int)tf->tf_a0 , (int)tf->tf_a1, &retval);
break;
case SYS_chdir:
err = sys_chdir((const char*)tf->tf_a0);
break;
case SYS___getcwd:
err = sys___getcwd((char*)tf->tf_a0, (size_t)tf->tf_a1, &retval);
break;
case SYS_fork:
err = sys_fork(tf, &retval);
break;
case SYS_getpid:
err = sys_getpid(&retval);
break;
case SYS__exit:
err = sys__exit((int)tf->tf_a0, &retval);
break;
case SYS_waitpid:
err = sys_waitpid((int) tf->tf_a0, (int*) tf->tf_a1, tf->tf_a2, &retval);
break;
case SYS_execv:
err = sys_execv((const char*) tf->tf_a0, (char**) tf->tf_a1, &retval);
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
/*
* System call dispatcher.
*
* A pointer to the trapframe created during exception entry (in
* exception-*.S) is passed in.
*
* The calling conventions for syscalls are as follows: Like ordinary
* function calls, the first 4 32-bit arguments are passed in the 4
* argument registers a0-a3. 64-bit arguments are passed in *aligned*
* pairs of registers, that is, either a0/a1 or a2/a3. This means that
* if the first argument is 32-bit and the second is 64-bit, a1 is
* unused.
*
* This much is the same as the calling conventions for ordinary
* function calls. In addition, the system call number is passed in
* the v0 register.
*
* On successful return, the return value is passed back in the v0
* register, or v0 and v1 if 64-bit. This is also like an ordinary
* function call, and additionally the a3 register is also set to 0 to
* indicate success.
*
* On an error return, the error code is passed back in the v0
* register, and the a3 register is set to 1 to indicate failure.
* (Userlevel code takes care of storing the error code in errno and
* returning the value -1 from the actual userlevel syscall function.
* See src/user/lib/libc/arch/mips/syscalls-mips.S and related files.)
*
* Upon syscall return the program counter stored in the trapframe
* must be incremented by one instruction; otherwise the exception
* return code will restart the "syscall" instruction and the system
* call will repeat forever.
*
* If you run out of registers (which happens quickly with 64-bit
* values) further arguments must be fetched from the user-level
* stack, starting at sp+16 to skip over the slots for the
* registerized values, with copyin().
*/
void
syscall(struct trapframe *tf)
{
int callno;
int32_t retval;
int err;
KASSERT(curthread != NULL);
KASSERT(curthread->t_curspl == 0);
KASSERT(curthread->t_iplhigh_count == 0);
callno = tf->tf_v0;
/*
* Initialize retval to 0. Many of the system calls don't
* really return a value, just 0 for success and -1 on
* error. Since retval is the value returned on success,
* initialize it to 0 by default; thus it's not necessary to
* deal with it except for calls that return other values,
* like write.
*/
retval = 0;
int whence = 0;
off_t position = 0;
int32_t retval2 = 0;
switch (callno) {
case SYS_reboot:
err = sys_reboot(tf->tf_a0);
break;
case SYS___time:
err = sys___time((userptr_t)tf->tf_a0,
(userptr_t)tf->tf_a1);
break;
/* Add stuff here */
case SYS_write:
err = sys_write((int)tf->tf_a0,(const void *)tf->tf_a1,(size_t)tf->tf_a2, &retval);
break;
case SYS_read:
err = sys_read(tf->tf_a0, (void *) tf->tf_a1, (size_t) tf->tf_a2, &retval);
break;
case SYS_open:
err = sys_open((char *)tf->tf_a0, tf->tf_a1, (mode_t)tf->tf_a2, &retval);
break;
case SYS_close:
err = sys_close(tf->tf_a0);
break;
case SYS_dup2:
err = sys_dup2(tf->tf_a0, tf->tf_a1, &retval);
break;
case SYS_lseek:
position |= (off_t)tf->tf_a2;
position <<= 32;
position |= (off_t)tf->tf_a3;
err = copyin((const userptr_t)tf->tf_sp+16, &whence, sizeof(whence));
if (err)
break;
err = sys_lseek((int)tf->tf_a0, position, (int)whence, &retval, &retval2);
if(!err)
tf->tf_v1 = retval2;
break;
case SYS_fork:
err = sys_fork(tf,&retval);
break;
case SYS_getpid:
err = sys_getpid((pid_t *)&retval);
break;
case SYS_waitpid:
err = sys_waitpid((pid_t)tf->tf_a0, (userptr_t)tf->tf_a1, (int)tf->tf_a2, (pid_t *)&retval);
break;
case SYS__exit:
sys__exit((int)tf->tf_a0);
err = -1;
//will never come here as it doesnt return
break;
case SYS_execv:
err=sys_execv((const char *)tf->tf_a0,(char **)tf->tf_a1);
break;
case SYS_sbrk:
err=(int)sys_sbrk((intptr_t)tf->tf_a0, (vaddr_t *)&retval);
break;
default:
kprintf("Unknown syscall %d\n", callno);
err = ENOSYS;
break;
}
if (err) {
/*
* Return the error code. This gets converted at
* userlevel to a return value of -1 and the error
* code in errno.
*/
tf->tf_v0 = err;
tf->tf_a3 = 1; /* signal an error */
}
else {
/* Success. */
tf->tf_v0 = retval;
tf->tf_a3 = 0; /* signal no error */
}
/*
* Now, advance the program counter, to avoid restarting
* the syscall over and over again.
*/
tf->tf_epc += 4;
/* Make sure the syscall code didn't forget to lower spl */
KASSERT(curthread->t_curspl == 0);
/* ...or leak any spinlocks */
KASSERT(curthread->t_iplhigh_count == 0);
}