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/* $Id: traps.c,v 1.13 1997/05/27 19:30:08 jj Exp $
* arch/sparc/kernel/traps.c
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
/*
* I hate traps on the sparc, grrr...
*/
#include <linux/sched.h> /* for jiffies */
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <asm/delay.h>
#include <asm/system.h>
#include <asm/ptrace.h>
#include <asm/oplib.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/unistd.h>
#include <asm/uaccess.h>
/* #define SYSCALL_TRACING */
/* #define VERBOSE_SYSCALL_TRACING */
#ifdef SYSCALL_TRACING
#ifdef VERBOSE_SYSCALL_TRACING
struct sdesc {
int scall_num;
char *name;
int num_args;
char arg_is_string[6];
} sdesc_entries[] = {
{ 0, "setup", 0, },
{ 1, "exit", 1, { 0, } },
{ 2, "fork", 0, },
{ 3, "read", 3, { 0, 0, 0, } },
{ 4, "write", 3, { 0, 0, 0, } },
{ 5, "open", 3, { 1, 0, 0, } },
{ 6, "close", 1, { 0, } },
{ 7, "wait4", 4, { 0, 0, 0, 0, } },
{ 8, "creat", 2, { 1, 0, } },
{ 9, "link", 2, { 1, 1, } },
{ 10, "unlink", 1, { 1, } },
{ 11, "execv", 2, { 1, 0, } },
{ 12, "chdir", 1, { 1, } },
{ 15, "chmod", 2, { 1, 0, } },
{ 16, "chown", 3, { 1, 0, 0, } },
{ 17, "brk", 1, { 0, } },
{ 19, "lseek", 3, { 0, 0, 0, } },
{ 27, "alarm", 1, { 0, } },
{ 29, "pause", 0, },
{ 33, "access", 2, { 1, 0, } },
{ 36, "sync", 0, },
{ 37, "kill", 2, { 0, 0, } },
{ 38, "stat", 2, { 1, 0, } },
{ 40, "lstat", 2, { 1, 0, } },
{ 41, "dup", 1, { 0, } },
{ 42, "pipd", 0, },
{ 54, "ioctl", 3, { 0, 0, 0, } },
{ 57, "symlink", 2, { 1, 1, } },
{ 58, "readlink", 3, { 1, 0, 0, } },
{ 59, "execve", 3, { 1, 0, 0, } },
{ 60, "umask", 1, { 0, } },
{ 62, "fstat", 2, { 0, 0, } },
{ 64, "getpagesize", 0, },
{ 71, "mmap", 6, { 0, 0, 0, 0, 0, 0, } },
{ 73, "munmap", 2, { 0, 0, } },
{ 74, "mprotect", 3, { 0, 0, 0, } },
{ 83, "setitimer", 3, { 0, 0, 0, } },
{ 90, "dup2", 2, { 0, 0, } },
{ 92, "fcntl", 3, { 0, 0, 0, } },
{ 93, "select", 5, { 0, 0, 0, 0, 0, } },
{ 97, "socket", 3, { 0, 0, 0, } },
{ 98, "connect", 3, { 0, 0, 0, } },
{ 99, "accept", 3, { 0, 0, 0, } },
{ 101, "send", 4, { 0, 0, 0, 0, } },
{ 102, "recv", 4, { 0, 0, 0, 0, } },
{ 104, "bind", 3, { 0, 0, 0, } },
{ 105, "setsockopt", 5, { 0, 0, 0, 0, 0, } },
{ 106, "listen", 2, { 0, 0, } },
{ 120, "readv", 3, { 0, 0, 0, } },
{ 121, "writev", 3, { 0, 0, 0, } },
{ 123, "fchown", 3, { 0, 0, 0, } },
{ 124, "fchmod", 2, { 0, 0, } },
{ 128, "rename", 2, { 1, 1, } },
{ 129, "truncate", 2, { 1, 0, } },
{ 130, "ftruncate", 2, { 0, 0, } },
{ 131, "flock", 2, { 0, 0, } },
{ 136, "mkdir", 2, { 1, 0, } },
{ 137, "rmdir", 1, { 1, } },
{ 146, "killpg", 1, { 0, } },
{ 157, "statfs", 2, { 1, 0, } },
{ 158, "fstatfs", 2, { 0, 0, } },
{ 159, "umount", 1, { 1, } },
{ 167, "mount", 5, { 1, 1, 1, 0, 0, } },
{ 174, "getdents", 3, { 0, 0, 0, } },
{ 176, "fchdir", 2, { 0, 0, } },
{ 198, "sigaction", 3, { 0, 0, 0, } },
{ 201, "sigsuspend", 1, { 0, } },
{ 206, "socketcall", 2, { 0, 0, } },
{ 216, "sigreturn", 0, },
{ 230, "newselect", 5, { 0, 0, 0, 0, 0, } },
{ 236, "llseek", 5, { 0, 0, 0, 0, 0, } },
{ 251, "sysctl", 1, { 0, } },
};
#define NUM_SDESC_ENTRIES (sizeof(sdesc_entries) / sizeof(sdesc_entries[0]))
#endif
#ifdef VERBOSE_SYSCALL_TRACING
static char scall_strbuf[512];
#endif
void syscall_trace_entry(unsigned long g1, struct pt_regs *regs)
{
#ifdef VERBOSE_SYSCALL_TRACING
struct sdesc *sdp;
int i;
#endif
printk("SYS[%s:%d]: <%d> ", current->comm, current->pid, (int)g1);
#ifdef VERBOSE_SYSCALL_TRACING
sdp = NULL;
for(i = 0; i < NUM_SDESC_ENTRIES; i++)
if(sdesc_entries[i].scall_num == g1) {
sdp = &sdesc_entries[i];
break;
}
if(sdp) {
printk("%s(", sdp->name);
for(i = 0; i < sdp->num_args; i++) {
if(i)
printk(",");
if(!sdp->arg_is_string[i])
printk("%08x", (unsigned int)regs->u_regs[UREG_I0 + i]);
else {
strncpy_from_user(scall_strbuf,
(char *)regs->u_regs[UREG_I0 + i],
512);
printk("%s", scall_strbuf);
}
}
printk(") ");
}
#endif
}
unsigned long syscall_trace_exit(unsigned long retval, struct pt_regs *regs)
{
printk("ret[%08x]\n", (unsigned int) retval);
return retval;
}
#endif /* SYSCALL_TRACING */
#if 0
void user_rtrap_report(struct pt_regs *regs)
{
static int hits = 0;
/* Bwahhhhrggg... */
if(regs->tpc == 0x1f294UL && ++hits == 2) {
register unsigned long ctx asm("o4");
register unsigned long paddr asm("o5");
unsigned long cwp, wstate;
printk("RT[%016lx:%016lx] ", regs->tpc, regs->u_regs[UREG_I6]);
__asm__ __volatile__("rdpr %%cwp, %0" : "=r" (cwp));
__asm__ __volatile__("rdpr %%wstate, %0" : "=r" (wstate));
printk("CWP[%d] WSTATE[%016lx]\n"
"TSS( ksp[%016lx] kpc[%016lx] wstate[%016lx] w_saved[%d] flgs[%x]"
" cur_ds[%d] )\n", cwp, wstate,
current->tss.ksp, current->tss.kpc, current->tss.wstate,
(int) current->tss.w_saved, current->tss.flags,
current->tss.current_ds);
__asm__ __volatile__("
rdpr %%pstate, %%o3
wrpr %%o3, %2, %%pstate
mov %%g7, %%o5
mov 0x10, %%o4
ldxa [%%o4] %3, %%o4
wrpr %%o3, 0x0, %%pstate
" : "=r" (ctx), "=r" (paddr)
: "i" (PSTATE_MG|PSTATE_IE), "i" (ASI_DMMU));
printk("MMU[ppgd(%016lx)sctx(%d)] ", paddr, ctx);
printk("mm->context(%016lx) mm->pgd(%p)\n",
current->mm->context, current->mm->pgd);
printk("TASK: signal[%016lx] blocked[%016lx]\n",
current->signal, current->blocked);
show_regs(regs);
while(1)
barrier();
}
}
#endif
void bad_trap (struct pt_regs *regs, long lvl)
{
lock_kernel ();
if (lvl < 0x100) {
char buffer[24];
sprintf (buffer, "Bad hw trap %lx at tl0\n", lvl);
die_if_kernel (buffer, regs);
}
if (regs->tstate & TSTATE_PRIV)
die_if_kernel ("Kernel bad trap", regs);
current->tss.sig_desc = SUBSIG_BADTRAP(lvl - 0x100);
current->tss.sig_address = regs->tpc;
send_sig(SIGILL, current, 1);
unlock_kernel ();
}
void bad_trap_tl1 (struct pt_regs *regs, long lvl)
{
char buffer[24];
lock_kernel ();
sprintf (buffer, "Bad trap %lx at tl>0", lvl);
die_if_kernel (buffer, regs);
}
void data_access_exception (struct pt_regs *regs)
{
lock_kernel ();
printk ("Unhandled data access exception ");
printk("sfsr %016lx sfar %016lx\n", spitfire_get_dsfsr(), spitfire_get_sfar());
die_if_kernel("Data access exception", regs);
}
void do_dae(struct pt_regs *regs)
{
printk("DAE: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void instruction_access_exception (struct pt_regs *regs)
{
lock_kernel ();
printk ("Unhandled instruction access exception ");
printk("sfsr %016lx\n", spitfire_get_isfsr());
die_if_kernel("Instruction access exception", regs);
}
void do_iae(struct pt_regs *regs)
{
printk("IAE at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_fpdis(struct pt_regs *regs)
{
printk("FPDIS: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_fpieee(struct pt_regs *regs)
{
printk("FPIEEE: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_fpother(struct pt_regs *regs)
{
printk("FPOTHER: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_tof(struct pt_regs *regs)
{
printk("TOF: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_div0(struct pt_regs *regs)
{
printk("DIV0: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void instruction_dump (unsigned int *pc)
{
int i;
if((((unsigned long) pc) & 3))
return;
for(i = -3; i < 6; i++)
printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
printk("\n");
}
void die_if_kernel(char *str, struct pt_regs *regs)
{
/* Amuse the user. */
printk(
" \\|/ ____ \\|/\n"
" \"@'/ .` \\`@\"\n"
" /_| \\__/ |_\\\n"
" \\__U_/\n");
printk("%s(%d): %s\n", current->comm, current->pid, str);
__asm__ __volatile__("flushw");
show_regs(regs);
{
struct reg_window *rw = (struct reg_window *)
(regs->u_regs[UREG_FP] + STACK_BIAS);
if(rw) {
printk("Caller[%016lx]\n", rw->ins[7]);
rw = (struct reg_window *)
(rw->ins[6] + STACK_BIAS);
if(rw) {
printk("Caller[%016lx]\n", rw->ins[7]);
rw = (struct reg_window *)
(rw->ins[6] + STACK_BIAS);
if(rw)
printk("Caller[%016lx]\n", rw->ins[7]);
}
}
}
printk("Instruction DUMP:");
instruction_dump ((unsigned int *) regs->tpc);
if(regs->tstate & TSTATE_PRIV)
do_exit(SIGKILL);
do_exit(SIGSEGV);
}
void do_illegal_instruction(struct pt_regs *regs)
{
unsigned long pc = regs->tpc;
unsigned long tstate = regs->tstate;
lock_kernel();
if(tstate & TSTATE_PRIV)
die_if_kernel("Kernel illegal instruction", regs);
#if 1
{
unsigned int insn;
printk("Ill instr. at pc=%016lx ", pc);
get_user(insn, ((unsigned int *)pc));
printk("insn=[%08x]\n", insn);
}
#endif
current->tss.sig_address = pc;
current->tss.sig_desc = SUBSIG_ILLINST;
send_sig(SIGILL, current, 1);
unlock_kernel();
while(1)
barrier();
}
void do_mna(struct pt_regs *regs)
{
printk("AIEEE: do_mna at %016lx\n", regs->tpc);
show_regs(regs);
while(1)
barrier();
}
void do_privop(struct pt_regs *regs)
{
printk("PRIVOP: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_privact(struct pt_regs *regs)
{
printk("PRIVACT: at %016lx\n", regs->tpc);
while(1)
barrier();
}
void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc,
unsigned long tstate)
{
lock_kernel();
if(tstate & TSTATE_PRIV)
die_if_kernel("Penguin instruction from Penguin mode??!?!", regs);
current->tss.sig_address = pc;
current->tss.sig_desc = SUBSIG_PRIVINST;
send_sig(SIGILL, current, 1);
unlock_kernel();
}
/* XXX User may want to be allowed to do this. XXX */
void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc, unsigned long npc,
unsigned long tstate)
{
lock_kernel();
if(regs->tstate & TSTATE_PRIV) {
printk("KERNEL MNA at pc %016lx npc %016lx called by %016lx\n", pc, npc,
regs->u_regs[UREG_RETPC]);
die_if_kernel("BOGUS", regs);
/* die_if_kernel("Kernel MNA access", regs); */
}
current->tss.sig_address = pc;
current->tss.sig_desc = SUBSIG_PRIVINST;
#if 0
show_regs (regs);
instruction_dump ((unsigned long *) regs->tpc);
printk ("do_MNA!\n");
#endif
send_sig(SIGBUS, current, 1);
unlock_kernel();
}
void handle_hw_divzero(struct pt_regs *regs, unsigned long pc, unsigned long npc,
unsigned long psr)
{
lock_kernel();
send_sig(SIGILL, current, 1);
unlock_kernel();
}
void trap_init(void)
{
}
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