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target-arm: Don't use cpu_single_env in bank_number() 

Avoid using cpu_single_env in bank_number() -- if we were
called via the gdb stub reading or writing the CPSR then
it is NULL and we will segfault if we take the cpu_abort().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2012-01-05 15:49:06 +00:00
parent c47f322365
commit 1b9e01c110
1 changed files with 6 additions and 6 deletions
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12
target-arm/helper.c
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@ -642,7 +642,7 @@ uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
extern int semihosting_enabled;
/* Map CPU modes onto saved register banks. */
static inline int bank_number (int mode)
static inline int bank_number(CPUState *env, int mode)
{
switch (mode) {
case ARM_CPU_MODE_USR:
@ -659,7 +659,7 @@ static inline int bank_number (int mode)
case ARM_CPU_MODE_FIQ:
return 5;
}
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
cpu_abort(env, "Bad mode %x\n", mode);
return -1;
}
@ -680,12 +680,12 @@ void switch_mode(CPUState *env, int mode)
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
}
i = bank_number(old_mode);
i = bank_number(env, old_mode);
env->banked_r13[i] = env->regs[13];
env->banked_r14[i] = env->regs[14];
env->banked_spsr[i] = env->spsr;
i = bank_number(mode);
i = bank_number(env, mode);
env->regs[13] = env->banked_r13[i];
env->regs[14] = env->banked_r14[i];
env->spsr = env->banked_spsr[i];
@ -2125,7 +2125,7 @@ void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
if ((env->uncached_cpsr & CPSR_M) == mode) {
env->regs[13] = val;
} else {
env->banked_r13[bank_number(mode)] = val;
env->banked_r13[bank_number(env, mode)] = val;
}
}
@ -2134,7 +2134,7 @@ uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
if ((env->uncached_cpsr & CPSR_M) == mode) {
return env->regs[13];
} else {
return env->banked_r13[bank_number(mode)];
return env->banked_r13[bank_number(env, mode)];
}
}