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Better handle the break instruction trap. The runtime specification

Browse source 
has outlined which break numbers are software interrupts, debugger
breakpoints and ABI specific breaks. We mostly treated all break
numbers we didn't care about as debugger breakpoints.
This commit is contained in:
Marcel Moolenaar 2004-07-08 16:30:42 +00:00
parent 1b464bd889
commit 469df33664
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131821
1 changed files with 46 additions and 7 deletions
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53
sys/ia64/ia64/trap.c
View file

@ -440,10 +440,51 @@ trap(int vector, struct trapframe *tf)
case IA64_VEC_BREAK:
if (user) {
if (tf->tf_special.ifa == 0x100000) {
/* XXX we don't decode break.b */
ucode = (int)tf->tf_special.ifa & 0x1FFFFF;
if (ucode < 0x80000) {
/* Software interrupts. */
switch (ucode) {
case 0: /* Unknown error. */
sig = SIGILL;
break;
case 1: /* Integer divide by zero. */
sig = SIGFPE;
ucode = FPE_INTDIV;
break;
case 2: /* Integer overflow. */
sig = SIGFPE;
ucode = FPE_INTOVF;
break;
case 3: /* Range check/bounds check. */
sig = SIGFPE;
ucode = FPE_FLTSUB;
break;
case 6: /* Decimal overflow. */
case 7: /* Decimal divide by zero. */
case 8: /* Packed decimal error. */
case 9: /* Invalid ASCII digit. */
case 10: /* Invalid decimal digit. */
sig = SIGFPE;
ucode = FPE_FLTINV;
break;
case 4: /* Null pointer dereference. */
case 5: /* Misaligned data. */
case 11: /* Paragraph stack overflow. */
sig = SIGSEGV;
break;
default:
sig = SIGILL;
break;
}
} else if (ucode < 0x100000) {
/* Debugger breakpoint. */
tf->tf_special.psr &= ~IA64_PSR_SS;
sig = SIGTRAP;
} else if (ucode == 0x100000) {
break_syscall(tf);
return; /* do_ast() already called. */
} else if (tf->tf_special.ifa == 0x180000) {
} else if (ucode == 0x180000) {
mcontext_t mc;
error = copyin((void*)tf->tf_scratch.gr8,
@ -452,12 +493,10 @@ trap(int vector, struct trapframe *tf)
set_mcontext(td, &mc);
return; /* Don't call do_ast()!!! */
}
ucode = tf->tf_scratch.gr8;
sig = SIGSEGV;
} else {
tf->tf_special.psr &= ~IA64_PSR_SS;
sig = SIGTRAP;
}
ucode = tf->tf_scratch.gr8;
} else
sig = SIGILL;
} else {
#ifdef DDB
if (kdb_trap(vector, tf))