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target-arm: Drop CPUARMState* argument from bank_number()

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Drop the CPUARMState* argument from bank_number(), since we only
use it for passing to cpu_abort(). Use hw_error() instead.
This avoids propagating further interfaces using env pointers.

In the long term this function's callers need auditing to fix
problems where badly behaved guests can pass invalid bank numbers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Peter Maydell 2013-03-05 00:34:40 +00:00
parent eadd0e4413
commit f5206413af
1 changed files with 6 additions and 7 deletions
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13
target-arm/helper.c
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@ -1617,7 +1617,7 @@ uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
#else
/* Map CPU modes onto saved register banks. */
static inline int bank_number(CPUARMState *env, int mode)
static inline int bank_number(int mode)
{
switch (mode) {
case ARM_CPU_MODE_USR:
@ -1634,8 +1634,7 @@ static inline int bank_number(CPUARMState *env, int mode)
case ARM_CPU_MODE_FIQ:
return 5;
}
cpu_abort(env, "Bad mode %x\n", mode);
return -1;
hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
}
void switch_mode(CPUARMState *env, int mode)
@ -1655,12 +1654,12 @@ void switch_mode(CPUARMState *env, int mode)
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
}
i = bank_number(env, old_mode);
i = bank_number(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(env, mode);
i = bank_number(mode);
env->regs[13] = env->banked_r13[i];
env->regs[14] = env->banked_r14[i];
env->spsr = env->banked_spsr[i];
@ -2530,7 +2529,7 @@ void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
if ((env->uncached_cpsr & CPSR_M) == mode) {
env->regs[13] = val;
} else {
env->banked_r13[bank_number(env, mode)] = val;
env->banked_r13[bank_number(mode)] = val;
}
}
@ -2539,7 +2538,7 @@ uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
if ((env->uncached_cpsr & CPSR_M) == mode) {
return env->regs[13];
} else {
return env->banked_r13[bank_number(env, mode)];
return env->banked_r13[bank_number(mode)];
}
}