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Diffstat (limited to 'arch/alpha/kernel/traps.c')
-rw-r--r--arch/alpha/kernel/traps.c411
1 files changed, 130 insertions, 281 deletions
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index affccb959a9e..7004397937cf 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* arch/alpha/kernel/traps.c
*
@@ -8,19 +9,20 @@
* This file initializes the trap entry points
*/
+#include <linux/cpu.h>
#include <linux/jiffies.h>
#include <linux/mm.h>
-#include <linux/sched.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/debug.h>
#include <linux/tty.h>
#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/init.h>
+#include <linux/extable.h>
#include <linux/kallsyms.h>
#include <linux/ratelimit.h>
#include <asm/gentrap.h>
-#include <asm/uaccess.h>
-#include <asm/unaligned.h>
+#include <linux/uaccess.h>
+#include <linux/unaligned.h>
#include <asm/sysinfo.h>
#include <asm/hwrpb.h>
#include <asm/mmu_context.h>
@@ -28,46 +30,13 @@
#include "proto.h"
-/* Work-around for some SRMs which mishandle opDEC faults. */
-
-static int opDEC_fix;
-
-static void __cpuinit
-opDEC_check(void)
-{
- __asm__ __volatile__ (
- /* Load the address of... */
- " br $16, 1f\n"
- /* A stub instruction fault handler. Just add 4 to the
- pc and continue. */
- " ldq $16, 8($sp)\n"
- " addq $16, 4, $16\n"
- " stq $16, 8($sp)\n"
- " call_pal %[rti]\n"
- /* Install the instruction fault handler. */
- "1: lda $17, 3\n"
- " call_pal %[wrent]\n"
- /* With that in place, the fault from the round-to-minf fp
- insn will arrive either at the "lda 4" insn (bad) or one
- past that (good). This places the correct fixup in %0. */
- " lda %[fix], 0\n"
- " cvttq/svm $f31,$f31\n"
- " lda %[fix], 4"
- : [fix] "=r" (opDEC_fix)
- : [rti] "n" (PAL_rti), [wrent] "n" (PAL_wrent)
- : "$0", "$1", "$16", "$17", "$22", "$23", "$24", "$25");
-
- if (opDEC_fix)
- printk("opDEC fixup enabled.\n");
-}
-
void
dik_show_regs(struct pt_regs *regs, unsigned long *r9_15)
{
printk("pc = [<%016lx>] ra = [<%016lx>] ps = %04lx %s\n",
regs->pc, regs->r26, regs->ps, print_tainted());
- print_symbol("pc is at %s\n", regs->pc);
- print_symbol("ra is at %s\n", regs->r26 );
+ printk("pc is at %pSR\n", (void *)regs->pc);
+ printk("ra is at %pSR\n", (void *)regs->r26);
printk("v0 = %016lx t0 = %016lx t1 = %016lx\n",
regs->r0, regs->r1, regs->r2);
printk("t2 = %016lx t3 = %016lx t4 = %016lx\n",
@@ -120,38 +89,34 @@ dik_show_code(unsigned int *pc)
}
static void
-dik_show_trace(unsigned long *sp)
+dik_show_trace(unsigned long *sp, const char *loglvl)
{
long i = 0;
- printk("Trace:\n");
+ printk("%sTrace:\n", loglvl);
while (0x1ff8 & (unsigned long) sp) {
extern char _stext[], _etext[];
unsigned long tmp = *sp;
sp++;
- if (tmp < (unsigned long) &_stext)
- continue;
- if (tmp >= (unsigned long) &_etext)
+ if (!is_kernel_text(tmp))
continue;
- printk("[<%lx>]", tmp);
- print_symbol(" %s", tmp);
- printk("\n");
+ printk("%s[<%lx>] %pSR\n", loglvl, tmp, (void *)tmp);
if (i > 40) {
- printk(" ...");
+ printk("%s ...", loglvl);
break;
}
}
- printk("\n");
+ printk("%s\n", loglvl);
}
static int kstack_depth_to_print = 24;
-void show_stack(struct task_struct *task, unsigned long *sp)
+void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)
{
unsigned long *stack;
int i;
/*
- * debugging aid: "show_stack(NULL);" prints the
+ * debugging aid: "show_stack(NULL, NULL, KERN_EMERG);" prints the
* back trace for this cpu.
*/
if(sp==NULL)
@@ -161,12 +126,17 @@ void show_stack(struct task_struct *task, unsigned long *sp)
for(i=0; i < kstack_depth_to_print; i++) {
if (((long) stack & (THREAD_SIZE-1)) == 0)
break;
- if (i && ((i % 4) == 0))
- printk("\n ");
- printk("%016lx ", *stack++);
+ if ((i % 4) == 0) {
+ if (i)
+ pr_cont("\n");
+ printk("%s ", loglvl);
+ } else {
+ pr_cont(" ");
+ }
+ pr_cont("%016lx", *stack++);
}
- printk("\n");
- dik_show_trace(sp);
+ pr_cont("\n");
+ dik_show_trace(sp, loglvl);
}
void
@@ -180,7 +150,7 @@ die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
printk("%s(%d): %s %ld\n", current->comm, task_pid_nr(current), str, err);
dik_show_regs(regs, r9_15);
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
- dik_show_trace((unsigned long *)(regs+1));
+ dik_show_trace((unsigned long *)(regs+1), KERN_DEFAULT);
dik_show_code((unsigned int *)regs->pc);
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
@@ -188,15 +158,17 @@ die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
local_irq_enable();
while (1);
}
- do_exit(SIGSEGV);
+ make_task_dead(SIGSEGV);
}
#ifndef CONFIG_MATHEMU
static long dummy_emul(void) { return 0; }
long (*alpha_fp_emul_imprecise)(struct pt_regs *regs, unsigned long writemask)
= (void *)dummy_emul;
+EXPORT_SYMBOL_GPL(alpha_fp_emul_imprecise);
long (*alpha_fp_emul) (unsigned long pc)
= (void *)dummy_emul;
+EXPORT_SYMBOL_GPL(alpha_fp_emul);
#else
long alpha_fp_emul_imprecise(struct pt_regs *regs, unsigned long writemask);
long alpha_fp_emul (unsigned long pc);
@@ -207,7 +179,6 @@ do_entArith(unsigned long summary, unsigned long write_mask,
struct pt_regs *regs)
{
long si_code = FPE_FLTINV;
- siginfo_t info;
if (summary & 1) {
/* Software-completion summary bit is set, so try to
@@ -222,20 +193,29 @@ do_entArith(unsigned long summary, unsigned long write_mask,
}
die_if_kernel("Arithmetic fault", regs, 0, NULL);
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = si_code;
- info.si_addr = (void __user *) regs->pc;
- send_sig_info(SIGFPE, &info, current);
+ send_sig_fault_trapno(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
}
asmlinkage void
do_entIF(unsigned long type, struct pt_regs *regs)
{
- siginfo_t info;
int signo, code;
- if ((regs->ps & ~IPL_MAX) == 0) {
+ if (type == 3) { /* FEN fault */
+ /* Irritating users can call PAL_clrfen to disable the
+ FPU for the process. The kernel will then trap in
+ do_switch_stack and undo_switch_stack when we try
+ to save and restore the FP registers.
+
+ Given that GCC by default generates code that uses the
+ FP registers, PAL_clrfen is not useful except for DoS
+ attacks. So turn the bleeding FPU back on and be done
+ with it. */
+ current_thread_info()->pcb.flags |= 1;
+ __reload_thread(&current_thread_info()->pcb);
+ return;
+ }
+ if (!user_mode(regs)) {
if (type == 1) {
const unsigned int *data
= (const unsigned int *) regs->pc;
@@ -243,37 +223,41 @@ do_entIF(unsigned long type, struct pt_regs *regs)
(const char *)(data[1] | (long)data[2] << 32),
data[0]);
}
+#ifdef CONFIG_ALPHA_WTINT
+ if (type == 4) {
+ /* If CALL_PAL WTINT is totally unsupported by the
+ PALcode, e.g. MILO, "emulate" it by overwriting
+ the insn. */
+ unsigned int *pinsn
+ = (unsigned int *) regs->pc - 1;
+ if (*pinsn == PAL_wtint) {
+ *pinsn = 0x47e01400; /* mov 0,$0 */
+ imb();
+ regs->r0 = 0;
+ return;
+ }
+ }
+#endif /* ALPHA_WTINT */
die_if_kernel((type == 1 ? "Kernel Bug" : "Instruction fault"),
regs, type, NULL);
}
switch (type) {
case 0: /* breakpoint */
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = TRAP_BRKPT;
- info.si_trapno = 0;
- info.si_addr = (void __user *) regs->pc;
-
if (ptrace_cancel_bpt(current)) {
regs->pc -= 4; /* make pc point to former bpt */
}
- send_sig_info(SIGTRAP, &info, current);
+ send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc,
+ current);
return;
case 1: /* bugcheck */
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = (void __user *) regs->pc;
- info.si_trapno = 0;
- send_sig_info(SIGTRAP, &info, current);
+ send_sig_fault_trapno(SIGTRAP, TRAP_UNK,
+ (void __user *) regs->pc, 0, current);
return;
case 2: /* gentrap */
- info.si_addr = (void __user *) regs->pc;
- info.si_trapno = regs->r16;
switch ((long) regs->r16) {
case GEN_INTOVF:
signo = SIGFPE;
@@ -305,7 +289,7 @@ do_entIF(unsigned long type, struct pt_regs *regs)
break;
case GEN_ROPRAND:
signo = SIGFPE;
- code = __SI_FAULT;
+ code = FPE_FLTUNK;
break;
case GEN_DECOVF:
@@ -327,72 +311,23 @@ do_entIF(unsigned long type, struct pt_regs *regs)
case GEN_SUBRNG7:
default:
signo = SIGTRAP;
- code = __SI_FAULT;
+ code = TRAP_UNK;
break;
}
- info.si_signo = signo;
- info.si_errno = 0;
- info.si_code = code;
- info.si_addr = (void __user *) regs->pc;
- send_sig_info(signo, &info, current);
+ send_sig_fault_trapno(signo, code, (void __user *) regs->pc,
+ regs->r16, current);
return;
case 4: /* opDEC */
- if (implver() == IMPLVER_EV4) {
- long si_code;
-
- /* The some versions of SRM do not handle
- the opDEC properly - they return the PC of the
- opDEC fault, not the instruction after as the
- Alpha architecture requires. Here we fix it up.
- We do this by intentionally causing an opDEC
- fault during the boot sequence and testing if
- we get the correct PC. If not, we set a flag
- to correct it every time through. */
- regs->pc += opDEC_fix;
-
- /* EV4 does not implement anything except normal
- rounding. Everything else will come here as
- an illegal instruction. Emulate them. */
- si_code = alpha_fp_emul(regs->pc - 4);
- if (si_code == 0)
- return;
- if (si_code > 0) {
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = si_code;
- info.si_addr = (void __user *) regs->pc;
- send_sig_info(SIGFPE, &info, current);
- return;
- }
- }
break;
- case 3: /* FEN fault */
- /* Irritating users can call PAL_clrfen to disable the
- FPU for the process. The kernel will then trap in
- do_switch_stack and undo_switch_stack when we try
- to save and restore the FP registers.
-
- Given that GCC by default generates code that uses the
- FP registers, PAL_clrfen is not useful except for DoS
- attacks. So turn the bleeding FPU back on and be done
- with it. */
- current_thread_info()->pcb.flags |= 1;
- __reload_thread(&current_thread_info()->pcb);
- return;
-
case 5: /* illoc */
default: /* unexpected instruction-fault type */
;
}
- info.si_signo = SIGILL;
- info.si_errno = 0;
- info.si_code = ILL_ILLOPC;
- info.si_addr = (void __user *) regs->pc;
- send_sig_info(SIGILL, &info, current);
+ send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, current);
}
/* There is an ifdef in the PALcode in MILO that enables a
@@ -405,15 +340,9 @@ do_entIF(unsigned long type, struct pt_regs *regs)
asmlinkage void
do_entDbg(struct pt_regs *regs)
{
- siginfo_t info;
-
die_if_kernel("Instruction fault", regs, 0, NULL);
- info.si_signo = SIGILL;
- info.si_errno = 0;
- info.si_code = ILL_ILLOPC;
- info.si_addr = (void __user *) regs->pc;
- force_sig_info(SIGILL, &info, current);
+ force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc);
}
@@ -469,12 +398,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -489,12 +414,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -509,12 +430,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -538,16 +455,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@@ -568,16 +479,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@@ -598,16 +503,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n\t"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@@ -618,7 +517,7 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
printk("Bad unaligned kernel access at %016lx: %p %lx %lu\n",
pc, va, opcode, reg);
- do_exit(SIGSEGV);
+ make_task_dead(SIGSEGV);
got_exception:
/* Ok, we caught the exception, but we don't want it. Is there
@@ -666,14 +565,14 @@ got_exception:
printk("gp = %016lx sp = %p\n", regs->gp, regs+1);
dik_show_code((unsigned int *)pc);
- dik_show_trace((unsigned long *)(regs+1));
+ dik_show_trace((unsigned long *)(regs+1), KERN_DEFAULT);
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
printk("die_if_kernel recursion detected.\n");
local_irq_enable();
while (1);
}
- do_exit(SIGSEGV);
+ make_task_dead(SIGSEGV);
}
/*
@@ -750,7 +649,7 @@ s_reg_to_mem (unsigned long s_reg)
static int unauser_reg_offsets[32] = {
R(r0), R(r1), R(r2), R(r3), R(r4), R(r5), R(r6), R(r7), R(r8),
/* r9 ... r15 are stored in front of regs. */
- -56, -48, -40, -32, -24, -16, -8,
+ -64, -56, -48, -40, -32, -24, -16, /* padding at -8 */
R(r16), R(r17), R(r18),
R(r19), R(r20), R(r21), R(r22), R(r23), R(r24), R(r25), R(r26),
R(r27), R(r28), R(gp),
@@ -767,11 +666,11 @@ do_entUnaUser(void __user * va, unsigned long opcode,
unsigned long tmp1, tmp2, tmp3, tmp4;
unsigned long fake_reg, *reg_addr = &fake_reg;
- siginfo_t info;
+ int si_code;
long error;
/* Check the UAC bits to decide what the user wants us to do
- with the unaliged access. */
+ with the unaligned access. */
if (!(current_thread_info()->status & TS_UAC_NOPRINT)) {
if (__ratelimit(&ratelimit)) {
@@ -789,7 +688,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
/* Don't bother reading ds in the access check since we already
know that this came from the user. Also rely on the fact that
the page at TASK_SIZE is unmapped and so can't be touched anyway. */
- if (!__access_ok((unsigned long)va, 0, USER_DS))
+ if ((unsigned long)va >= TASK_SIZE)
goto give_sigsegv;
++unaligned[1].count;
@@ -822,12 +721,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -842,12 +737,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -862,12 +753,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -882,12 +769,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -902,12 +785,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %1,3b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %2,3b-2b(%0)\n"
- ".previous"
+ EXC(1b,3b,%1,%0)
+ EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@@ -931,16 +810,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
@@ -950,7 +823,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
case 0x26: /* sts */
fake_reg = s_reg_to_mem(alpha_read_fp_reg(reg));
- /* FALLTHRU */
+ fallthrough;
case 0x2c: /* stl */
__asm__ __volatile__(
@@ -965,16 +838,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
@@ -984,7 +851,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
case 0x27: /* stt */
fake_reg = alpha_read_fp_reg(reg);
- /* FALLTHRU */
+ fallthrough;
case 0x2d: /* stq */
__asm__ __volatile__(
@@ -999,16 +866,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
- ".section __ex_table,\"a\"\n\t"
- " .long 1b - .\n"
- " lda %2,5b-1b(%0)\n"
- " .long 2b - .\n"
- " lda %1,5b-2b(%0)\n"
- " .long 3b - .\n"
- " lda $31,5b-3b(%0)\n"
- " .long 4b - .\n"
- " lda $31,5b-4b(%0)\n"
- ".previous"
+ EXC(1b,5b,%2,%0)
+ EXC(2b,5b,%1,%0)
+ EXC(3b,5b,$31,%0)
+ EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
@@ -1028,49 +889,37 @@ do_entUnaUser(void __user * va, unsigned long opcode,
give_sigsegv:
regs->pc -= 4; /* make pc point to faulting insn */
- info.si_signo = SIGSEGV;
- info.si_errno = 0;
/* We need to replicate some of the logic in mm/fault.c,
since we don't have access to the fault code in the
exception handling return path. */
- if (!__access_ok((unsigned long)va, 0, USER_DS))
- info.si_code = SEGV_ACCERR;
+ if ((unsigned long)va >= TASK_SIZE)
+ si_code = SEGV_ACCERR;
else {
struct mm_struct *mm = current->mm;
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
if (find_vma(mm, (unsigned long)va))
- info.si_code = SEGV_ACCERR;
+ si_code = SEGV_ACCERR;
else
- info.si_code = SEGV_MAPERR;
- up_read(&mm->mmap_sem);
+ si_code = SEGV_MAPERR;
+ mmap_read_unlock(mm);
}
- info.si_addr = va;
- send_sig_info(SIGSEGV, &info, current);
+ send_sig_fault(SIGSEGV, si_code, va, current);
return;
give_sigbus:
regs->pc -= 4;
- info.si_signo = SIGBUS;
- info.si_errno = 0;
- info.si_code = BUS_ADRALN;
- info.si_addr = va;
- send_sig_info(SIGBUS, &info, current);
+ send_sig_fault(SIGBUS, BUS_ADRALN, va, current);
return;
}
-void __cpuinit
+void
trap_init(void)
{
/* Tell PAL-code what global pointer we want in the kernel. */
register unsigned long gptr __asm__("$29");
wrkgp(gptr);
- /* Hack for Multia (UDB) and JENSEN: some of their SRMs have
- a bug in the handling of the opDEC fault. Fix it up if so. */
- if (implver() == IMPLVER_EV4)
- opDEC_check();
-
wrent(entArith, 1);
wrent(entMM, 2);
wrent(entIF, 3);
generated by cgit (git 2.34.1) at 2025-12-25 10:03:37 +0000