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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-11-06 12:33:18 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2019-11-06 13:45:05 +0100 |
| commit | 5849dfe410b3fefec7d54a536cda7ccbf809ebea (patch) | |
| tree | 400cea3caa940a5e82bd920bf8f9d4cc28fdd96e | |
| parent | 2ad983e0f4ea58a176ea51d61226758eff40c697 (diff) | |
linux-user/alpha: Set r20 secondary return value
This value is not, as far as I know, used by any linux software,
but it is set by the kernel and is part of the ABI.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191106113318.10226-13-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
| -rw-r--r-- | linux-user/alpha/target_cpu.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/linux-user/alpha/target_cpu.h b/linux-user/alpha/target_cpu.h index dd25e18f47..ad408ab5cc 100644 --- a/linux-user/alpha/target_cpu.h +++ b/linux-user/alpha/target_cpu.h @@ -27,10 +27,19 @@ static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp, } env->ir[IR_V0] = 0; env->ir[IR_A3] = 0; + env->ir[IR_A4] = 1; /* OSF/1 secondary return: child */ } static inline void cpu_clone_regs_parent(CPUAlphaState *env, unsigned flags) { + /* + * OSF/1 secondary return: parent + * Note that the kernel does not do this if SETTLS, because the + * settls argument register is still live after copy_thread. + */ + if (!(flags & CLONE_SETTLS)) { + env->ir[IR_A4] = 0; + } } static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls) |