| Message ID | 1336575277-12840-1-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
Am 09.05.2012 16:54, schrieb Peter Maydell: > The macro definition of cpu_init meant that if cpu_arm_init() > returned NULL this wouldn't result in cpu_init() itself returning > NULL. This had the effect that "-cpu foo" for some unknown CPU > name 'foo' would cause ARM targets to segfault rather than > generating a useful error message. Fix this by making cpu_init > a simple inline function. Ouch. > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> > --- > I did a quick grep and I think ARM is the only target at the moment > where we've made this change to cpu_init -- is that right, Andreas? Affirmative for master. But I need to respin my qom-cpu-reset series (QOM CPUState part 3) and the followups I have queued. > target-arm/cpu.h | 10 +++++++++- > 1 files changed, 9 insertions(+), 1 deletions(-) > > diff --git a/target-arm/cpu.h b/target-arm/cpu.h > index 5eac070..d01285f 100644 > --- a/target-arm/cpu.h > +++ b/target-arm/cpu.h > @@ -458,7 +458,15 @@ void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, > #define TARGET_PHYS_ADDR_SPACE_BITS 32 > #define TARGET_VIRT_ADDR_SPACE_BITS 32 > > -#define cpu_init(model) (&cpu_arm_init(model)->env) > +static inline CPUARMState *cpu_init(const char *cpu_model) > +{ > + ARMCPU *cpu = cpu_arm_init(cpu_model); > + if (cpu) { Personally I prefer an explicit NULL check for pointers, but it's the same either way. > + return &cpu->env; > + } > + return NULL; > +} > + > #define cpu_exec cpu_arm_exec > #define cpu_gen_code cpu_arm_gen_code > #define cpu_signal_handler cpu_arm_signal_handler Acked-by: Andreas Färber <afaerber@suse.de> Thanks, Andreas
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 5eac070..d01285f 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -458,7 +458,15 @@ void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, #define TARGET_PHYS_ADDR_SPACE_BITS 32 #define TARGET_VIRT_ADDR_SPACE_BITS 32 -#define cpu_init(model) (&cpu_arm_init(model)->env) +static inline CPUARMState *cpu_init(const char *cpu_model) +{ + ARMCPU *cpu = cpu_arm_init(cpu_model); + if (cpu) { + return &cpu->env; + } + return NULL; +} + #define cpu_exec cpu_arm_exec #define cpu_gen_code cpu_arm_gen_code #define cpu_signal_handler cpu_arm_signal_handler
The macro definition of cpu_init meant that if cpu_arm_init() returned NULL this wouldn't result in cpu_init() itself returning NULL. This had the effect that "-cpu foo" for some unknown CPU name 'foo' would cause ARM targets to segfault rather than generating a useful error message. Fix this by making cpu_init a simple inline function. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- I did a quick grep and I think ARM is the only target at the moment where we've made this change to cpu_init -- is that right, Andreas? target-arm/cpu.h | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-)