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target-arm: Set DBGDSCR.MOE for debug exceptions taken to AArch32 

For debug exceptions taken to AArch32 we have to set the
DBGDSCR.MOE (Method Of Entry) bits; we can identify the
kind of debug exception from the information in
exception.syndrome.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-09-12 14:06:49 +01:00
parent 3ff6fc9148
commit 16a906fd6e
1 changed files with 26 additions and 0 deletions
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26
target-arm/helper.c
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@ -3629,11 +3629,37 @@ void arm_cpu_do_interrupt(CPUState *cs)
uint32_t mask;
int new_mode;
uint32_t offset;
uint32_t moe;
assert(!IS_M(env));
arm_log_exception(cs->exception_index);
/* If this is a debug exception we must update the DBGDSCR.MOE bits */
switch (env->exception.syndrome >> ARM_EL_EC_SHIFT) {
case EC_BREAKPOINT:
case EC_BREAKPOINT_SAME_EL:
moe = 1;
break;
case EC_WATCHPOINT:
case EC_WATCHPOINT_SAME_EL:
moe = 10;
break;
case EC_AA32_BKPT:
moe = 3;
break;
case EC_VECTORCATCH:
moe = 5;
break;
default:
moe = 0;
break;
}
if (moe) {
env->cp15.mdscr_el1 = deposit64(env->cp15.mdscr_el1, 2, 4, moe);
}
/* TODO: Vectored interrupt controller. */
switch (cs->exception_index) {
case EXCP_UDEF: