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signal/ia64: Use force_sig_fault where appropriate

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Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-04-17 17:39:29 -05:00
parent b92adb74ad
commit a618a2754c
4 changed files with 49 additions and 150 deletions
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31
arch/ia64/kernel/brl_emu.c
View File

@ -58,11 +58,9 @@ ia64_emulate_brl (struct pt_regs *regs, unsigned long ar_ec)
unsigned long bundle[2];
unsigned long opcode, btype, qp, offset, cpl;
unsigned long next_ip;
struct siginfo siginfo;
struct illegal_op_return rv;
long tmp_taken, unimplemented_address;
clear_siginfo(&siginfo);
rv.fkt = (unsigned long) -1;
/*
@ -198,39 +196,22 @@ ia64_emulate_brl (struct pt_regs *regs, unsigned long ar_ec)
* The target address contains unimplemented bits.
*/
printk(KERN_DEBUG "Woah! Unimplemented Instruction Address Trap!\n");
siginfo.si_signo = SIGILL;
siginfo.si_errno = 0;
siginfo.si_flags = 0;
siginfo.si_isr = 0;
siginfo.si_imm = 0;
siginfo.si_code = ILL_BADIADDR;
force_sig_info(SIGILL, &siginfo, current);
force_sig_fault(SIGILL, ILL_BADIADDR, (void __user *)NULL,
0, 0, 0, current);
} else if (ia64_psr(regs)->tb) {
/*
* Branch Tracing is enabled.
* Force a taken branch signal.
*/
siginfo.si_signo = SIGTRAP;
siginfo.si_errno = 0;
siginfo.si_code = TRAP_BRANCH;
siginfo.si_flags = 0;
siginfo.si_isr = 0;
siginfo.si_addr = 0;
siginfo.si_imm = 0;
force_sig_info(SIGTRAP, &siginfo, current);
force_sig_fault(SIGTRAP, TRAP_BRANCH, (void __user *)NULL,
0, 0, 0, current);
} else if (ia64_psr(regs)->ss) {
/*
* Single Step is enabled.
* Force a trace signal.
*/
siginfo.si_signo = SIGTRAP;
siginfo.si_errno = 0;
siginfo.si_code = TRAP_TRACE;
siginfo.si_flags = 0;
siginfo.si_isr = 0;
siginfo.si_addr = 0;
siginfo.si_imm = 0;
force_sig_info(SIGTRAP, &siginfo, current);
force_sig_fault(SIGTRAP, TRAP_TRACE, (void __user *)NULL,
0, 0, 0, current);
}
return rv;
}

144
arch/ia64/kernel/traps.c
View File

@ -100,16 +100,8 @@ die_if_kernel (char *str, struct pt_regs *regs, long err)
void
__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
{
siginfo_t siginfo;
int sig, code;
/* SIGILL, SIGFPE, SIGSEGV, and SIGBUS want these field initialized: */
clear_siginfo(&siginfo);
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
siginfo.si_imm = break_num;
siginfo.si_flags = 0; /* clear __ISR_VALID */
siginfo.si_isr = 0;
switch (break_num) {
case 0: /* unknown error (used by GCC for __builtin_abort()) */
if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
@ -182,10 +174,9 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
sig = SIGTRAP; code = TRAP_BRKPT;
}
}
siginfo.si_signo = sig;
siginfo.si_errno = 0;
siginfo.si_code = code;
force_sig_info(sig, &siginfo, current);
force_sig_fault(sig, code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
break_num, 0 /* clear __ISR_VALID */, 0, current);
}
/*
@ -344,30 +335,25 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
return -1;
} else {
struct siginfo siginfo;
/* is next instruction a trap? */
int si_code;
if (exception & 2) {
ia64_increment_ip(regs);
}
clear_siginfo(&siginfo);
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FLTUNK; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
si_code = FPE_FLTUNK; /* default code */
if (isr & 0x11) {
siginfo.si_code = FPE_FLTINV;
si_code = FPE_FLTINV;
} else if (isr & 0x22) {
/* denormal operand gets the same si_code as underflow
* see arch/i386/kernel/traps.c:math_error() */
siginfo.si_code = FPE_FLTUND;
si_code = FPE_FLTUND;
} else if (isr & 0x44) {
siginfo.si_code = FPE_FLTDIV;
si_code = FPE_FLTDIV;
}
siginfo.si_isr = isr;
siginfo.si_flags = __ISR_VALID;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
force_sig_fault(SIGFPE, si_code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
0, __ISR_VALID, isr, current);
}
} else {
if (exception == -1) {
@ -375,24 +361,19 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
return -1;
} else if (exception != 0) {
/* raise exception */
struct siginfo siginfo;
int si_code;
clear_siginfo(&siginfo);
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FLTUNK; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
si_code = FPE_FLTUNK; /* default code */
if (isr & 0x880) {
siginfo.si_code = FPE_FLTOVF;
si_code = FPE_FLTOVF;
} else if (isr & 0x1100) {
siginfo.si_code = FPE_FLTUND;
si_code = FPE_FLTUND;
} else if (isr & 0x2200) {
siginfo.si_code = FPE_FLTRES;
si_code = FPE_FLTRES;
}
siginfo.si_isr = isr;
siginfo.si_flags = __ISR_VALID;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
force_sig_fault(SIGFPE, si_code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
0, __ISR_VALID, isr, current);
}
}
return 0;
@ -408,7 +389,6 @@ ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
struct pt_regs regs)
{
struct illegal_op_return rv;
struct siginfo si;
char buf[128];
#ifdef CONFIG_IA64_BRL_EMU
@ -426,11 +406,9 @@ ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
if (die_if_kernel(buf, &regs, 0))
return rv;
clear_siginfo(&si);
si.si_signo = SIGILL;
si.si_code = ILL_ILLOPC;
si.si_addr = (void __user *) (regs.cr_iip + ia64_psr(&regs)->ri);
force_sig_info(SIGILL, &si, current);
force_sig_fault(SIGILL, ILL_ILLOPC,
(void __user *) (regs.cr_iip + ia64_psr(&regs)->ri),
0, 0, 0, current);
return rv;
}
@ -441,7 +419,7 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
{
unsigned long code, error = isr, iip;
char buf[128];
int result, sig;
int result, sig, si_code;
static const char *reason[] = {
"IA-64 Illegal Operation fault",
"IA-64 Privileged Operation fault",
@ -490,7 +468,6 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
case 26: /* NaT Consumption */
if (user_mode(&regs)) {
struct siginfo siginfo;
void __user *addr;
if (((isr >> 4) & 0xf) == 2) {
@ -505,15 +482,8 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
addr = (void __user *) (regs.cr_iip
+ ia64_psr(&regs)->ri);
}
clear_siginfo(&siginfo);
siginfo.si_signo = sig;
siginfo.si_code = code;
siginfo.si_errno = 0;
siginfo.si_addr = addr;
siginfo.si_imm = vector;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(sig, &siginfo, current);
force_sig_fault(sig, code, addr,
vector, __ISR_VALID, isr, current);
return;
} else if (ia64_done_with_exception(&regs))
return;
@ -522,17 +492,8 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
case 31: /* Unsupported Data Reference */
if (user_mode(&regs)) {
struct siginfo siginfo;
clear_siginfo(&siginfo);
siginfo.si_signo = SIGILL;
siginfo.si_code = ILL_ILLOPN;
siginfo.si_errno = 0;
siginfo.si_addr = (void __user *) iip;
siginfo.si_imm = vector;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(SIGILL, &siginfo, current);
force_sig_fault(SIGILL, ILL_ILLOPN, (void __user *) iip,
vector, __ISR_VALID, isr, current);
return;
}
sprintf(buf, "Unsupported data reference");
@ -541,10 +502,6 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
case 29: /* Debug */
case 35: /* Taken Branch Trap */
case 36: /* Single Step Trap */
{
struct siginfo siginfo;
clear_siginfo(&siginfo);
if (fsys_mode(current, &regs)) {
extern char __kernel_syscall_via_break[];
/*
@ -568,7 +525,7 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
switch (vector) {
default:
case 29:
siginfo.si_code = TRAP_HWBKPT;
si_code = TRAP_HWBKPT;
#ifdef CONFIG_ITANIUM
/*
* Erratum 10 (IFA may contain incorrect address) now has
@ -578,37 +535,22 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
ifa = regs.cr_iip;
#endif
break;
case 35: siginfo.si_code = TRAP_BRANCH; ifa = 0; break;
case 36: siginfo.si_code = TRAP_TRACE; ifa = 0; break;
case 35: si_code = TRAP_BRANCH; ifa = 0; break;
case 36: si_code = TRAP_TRACE; ifa = 0; break;
}
if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, siginfo.si_code, SIGTRAP)
if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, si_code, SIGTRAP)
== NOTIFY_STOP)
return;
siginfo.si_signo = SIGTRAP;
siginfo.si_errno = 0;
siginfo.si_addr = (void __user *) ifa;
siginfo.si_imm = 0;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(SIGTRAP, &siginfo, current);
force_sig_fault(SIGTRAP, si_code, (void __user *) ifa,
0, __ISR_VALID, isr, current);
return;
}
case 32: /* fp fault */
case 33: /* fp trap */
result = handle_fpu_swa((vector == 32) ? 1 : 0, &regs, isr);
if ((result < 0) || (current->thread.flags & IA64_THREAD_FPEMU_SIGFPE)) {
struct siginfo siginfo;
clear_siginfo(&siginfo);
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FLTINV;
siginfo.si_addr = (void __user *) iip;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
force_sig_fault(SIGFPE, FPE_FLTINV, (void __user *) iip,
0, __ISR_VALID, isr, current);
}
return;
@ -634,17 +576,9 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
} else {
/* Unimplemented Instr. Address Trap */
if (user_mode(&regs)) {
struct siginfo siginfo;
clear_siginfo(&siginfo);
siginfo.si_signo = SIGILL;
siginfo.si_code = ILL_BADIADDR;
siginfo.si_errno = 0;
siginfo.si_flags = 0;
siginfo.si_isr = 0;
siginfo.si_imm = 0;
siginfo.si_addr = (void __user *) iip;
force_sig_info(SIGILL, &siginfo, current);
force_sig_fault(SIGILL, ILL_BADIADDR,
(void __user *) iip,
0, 0, 0, current);
return;
}
sprintf(buf, "Unimplemented Instruction Address fault");

12
arch/ia64/kernel/unaligned.c
View File

@ -1298,7 +1298,6 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
mm_segment_t old_fs = get_fs();
unsigned long bundle[2];
unsigned long opcode;
struct siginfo si;
const struct exception_table_entry *eh = NULL;
union {
unsigned long l;
@ -1537,14 +1536,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
/* NOT_REACHED */
}
force_sigbus:
clear_siginfo(&si);
si.si_signo = SIGBUS;
si.si_errno = 0;
si.si_code = BUS_ADRALN;
si.si_addr = (void __user *) ifa;
si.si_flags = 0;
si.si_isr = 0;
si.si_imm = 0;
force_sig_info(SIGBUS, &si, current);
force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) ifa,
0, 0, 0, current);
goto done;
}

12
arch/ia64/mm/fault.c
View File

@ -248,16 +248,8 @@ retry:
return;
}
if (user_mode(regs)) {
struct siginfo si;
clear_siginfo(&si);
si.si_signo = signal;
si.si_errno = 0;
si.si_code = code;
si.si_addr = (void __user *) address;
si.si_isr = isr;
si.si_flags = __ISR_VALID;
force_sig_info(signal, &si, current);
force_sig_fault(signal, code, (void __user *) address,
0, __ISR_VALID, isr, current);
return;
}