motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-06 01:03:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target-arm: Add support for generating exceptions with syndrome information

Browse source 
Add new helpers exception_with_syndrome (for generating an exception
with syndrome information) and exception_uncategorized (for generating
an exception with "Unknown or Uncategorized Reason", which have a syndrome
register value of zero), and use them to generate the correct syndrome
information for exceptions which are raised directly from generated code.

This patch includes moving the A32/T32 gen_exception_insn functions
further up in the source file; they will be needed for "VFP/Neon disabled"
exception generation later.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Peter Maydell 2014-04-15 19:18:38 +01:00
parent 8bcbf37caa
commit d4a2dc675b
6 changed files with 140 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

21
target-arm/op_helper.c
View file

@ -244,14 +244,33 @@ void HELPER(wfe)(CPUARMState *env)
cpu_loop_exit(cs);
}
void HELPER(exception)(CPUARMState *env, uint32_t excp)
/* Raise an internal-to-QEMU exception. This is limited to only
* those EXCP values which are special cases for QEMU to interrupt
* execution and not to be used for exceptions which are passed to
* the guest (those must all have syndrome information and thus should
* use exception_with_syndrome).
*/
void HELPER(exception_internal)(CPUARMState *env, uint32_t excp)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
assert(excp_is_internal(excp));
cs->exception_index = excp;
cpu_loop_exit(cs);
}
/* Raise an exception with the specified syndrome register value */
void HELPER(exception_with_syndrome)(CPUARMState *env, uint32_t excp,
uint32_t syndrome)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
assert(!excp_is_internal(excp));
cs->exception_index = excp;
env->exception.syndrome = syndrome;
cpu_loop_exit(cs);
}
uint32_t HELPER(cpsr_read)(CPUARMState *env)
{
return cpsr_read(env) & ~CPSR_EXEC;