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linux-user/nios2: Adjust error return 

Follow the kernel assembly, which considers all negative
return values to be errors.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-5-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-04-21 08:16:35 -07:00
parent 66254caa42
commit b3a219b70e
1 changed files with 7 additions and 2 deletions
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9
linux-user/nios2/cpu_loop.c
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@ -55,9 +55,14 @@ void cpu_loop(CPUNios2State *env)
env->regs[7], env->regs[8], env->regs[9],
0, 0);
/*
* See the code after translate_rc_and_ret: all negative
* values are errors (aided by userspace restricted to 2G),
* errno is returned positive in r2, and error indication
* is a boolean in r7.
*/
env->regs[2] = abs(ret);
/* Return value is 0..4096 */
env->regs[7] = ret > 0xfffff000u;
env->regs[7] = ret < 0;
break;
case 1: