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target/arm: Move exception_bkpt_insn to debug_helper.c

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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220609202901.1177572-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-06-10 14:32:31 +01:00 • committed by Peter Maydell
parent 831c1b1087
commit 16f9d5f693
2 changed files with 31 additions and 29 deletions
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31
target/arm/debug_helper.c
View file

@ -430,6 +430,37 @@ void arm_debug_excp_handler(CPUState *cs)
} }
} }
/*
* Raise an EXCP_BKPT with the specified syndrome register value,
* targeting the correct exception level for debug exceptions.
*/
void HELPER(exception_bkpt_insn)(CPUARMState *env, uint32_t syndrome)
{
int debug_el = arm_debug_target_el(env);
int cur_el = arm_current_el(env);
/* FSR will only be used if the debug target EL is AArch32. */
env->exception.fsr = arm_debug_exception_fsr(env);
/*
* FAR is UNKNOWN: clear vaddress to avoid potentially exposing
* values to the guest that it shouldn't be able to see at its
* exception/security level.
*/
env->exception.vaddress = 0;
/*
* Other kinds of architectural debug exception are ignored if
* they target an exception level below the current one (in QEMU
* this is checked by arm_generate_debug_exceptions()). Breakpoint
* instructions are special because they always generate an exception
* to somewhere: if they can't go to the configured debug exception
* level they are taken to the current exception level.
*/
if (debug_el < cur_el) {
debug_el = cur_el;
}
raise_exception(env, EXCP_BKPT, syndrome, debug_el);
}
#if !defined(CONFIG_USER_ONLY) #if !defined(CONFIG_USER_ONLY)
vaddr arm_adjust_watchpoint_address(CPUState *cs, vaddr addr, int len) vaddr arm_adjust_watchpoint_address(CPUState *cs, vaddr addr, int len)

29
target/arm/op_helper.c
View file

@ -399,35 +399,6 @@ void HELPER(exception_with_syndrome)(CPUARMState *env, uint32_t excp,
raise_exception(env, excp, syndrome, target_el); raise_exception(env, excp, syndrome, target_el);
} }
/* Raise an EXCP_BKPT with the specified syndrome register value,
* targeting the correct exception level for debug exceptions.
*/
void HELPER(exception_bkpt_insn)(CPUARMState *env, uint32_t syndrome)
{
int debug_el = arm_debug_target_el(env);
int cur_el = arm_current_el(env);
/* FSR will only be used if the debug target EL is AArch32. */
env->exception.fsr = arm_debug_exception_fsr(env);
/* FAR is UNKNOWN: clear vaddress to avoid potentially exposing
* values to the guest that it shouldn't be able to see at its
* exception/security level.
*/
env->exception.vaddress = 0;
/*
* Other kinds of architectural debug exception are ignored if
* they target an exception level below the current one (in QEMU
* this is checked by arm_generate_debug_exceptions()). Breakpoint
* instructions are special because they always generate an exception
* to somewhere: if they can't go to the configured debug exception
* level they are taken to the current exception level.
*/
if (debug_el < cur_el) {
debug_el = cur_el;
}
raise_exception(env, EXCP_BKPT, syndrome, debug_el);
}
uint32_t HELPER(cpsr_read)(CPUARMState *env) uint32_t HELPER(cpsr_read)(CPUARMState *env)
{ {
return cpsr_read(env) & ~CPSR_EXEC; return cpsr_read(env) & ~CPSR_EXEC;