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target/hppa: Implement prctl_unalign_sigbus

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Leave TARGET_ALIGNED_ONLY set, but use the new CPUState
flag to set MO_UNALN for the instructions that the kernel
handles in the unaligned trap.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20211227150127.2659293-6-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-12-27 07:01:26 -08:00 • committed by Laurent Vivier
parent fed1424617
commit 217d1a5ef8
3 changed files with 20 additions and 6 deletions
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5
target/hppa/cpu.h
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@ -259,12 +259,14 @@ static inline target_ulong hppa_form_gva(CPUHPPAState *env, uint64_t spc,
return hppa_form_gva_psw(env->psw, spc, off);
}
/* Since PSW_{I,CB} will never need to be in tb->flags, reuse them.
/*
* Since PSW_{I,CB} will never need to be in tb->flags, reuse them.
* TB_FLAG_SR_SAME indicates that SR4 through SR7 all contain the
* same value.
*/
#define TB_FLAG_SR_SAME PSW_I
#define TB_FLAG_PRIV_SHIFT 8
#define TB_FLAG_UNALIGN 0x400
static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc,
target_ulong *cs_base,
@ -279,6 +281,7 @@ static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc,
#ifdef CONFIG_USER_ONLY
*pc = env->iaoq_f & -4;
*cs_base = env->iaoq_b & -4;
flags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus;
#else
/* ??? E, T, H, L, B, P bits need to be here, when implemented. */
flags |= env->psw & (PSW_W | PSW_C | PSW_D);