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linux-user: Implement PR_PAC_RESET_KEYS 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190201195404.30486-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2019-02-05 16:52:39 +00:00 committed by Peter Maydell
parent a15daafa1c
commit bff63fbf97
2 changed files with 43 additions and 0 deletions
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7
linux-user/aarch64/target_syscall.h
View File

@ -22,6 +22,13 @@ struct target_pt_regs {
#define TARGET_PR_SVE_SET_VL 50
#define TARGET_PR_SVE_GET_VL 51
#define TARGET_PR_PAC_RESET_KEYS 54
# define TARGET_PR_PAC_APIAKEY (1 << 0)
# define TARGET_PR_PAC_APIBKEY (1 << 1)
# define TARGET_PR_PAC_APDAKEY (1 << 2)
# define TARGET_PR_PAC_APDBKEY (1 << 3)
# define TARGET_PR_PAC_APGAKEY (1 << 4)
void arm_init_pauth_key(ARMPACKey *key);
#endif /* AARCH64_TARGET_SYSCALL_H */

36
linux-user/syscall.c
View File

@ -9691,6 +9691,42 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
}
}
return ret;
case TARGET_PR_PAC_RESET_KEYS:
{
CPUARMState *env = cpu_env;
ARMCPU *cpu = arm_env_get_cpu(env);
if (arg3 || arg4 || arg5) {
return -TARGET_EINVAL;
}
if (cpu_isar_feature(aa64_pauth, cpu)) {
int all = (TARGET_PR_PAC_APIAKEY | TARGET_PR_PAC_APIBKEY |
TARGET_PR_PAC_APDAKEY | TARGET_PR_PAC_APDBKEY |
TARGET_PR_PAC_APGAKEY);
if (arg2 == 0) {
arg2 = all;
} else if (arg2 & ~all) {
return -TARGET_EINVAL;
}
if (arg2 & TARGET_PR_PAC_APIAKEY) {
arm_init_pauth_key(&env->apia_key);
}
if (arg2 & TARGET_PR_PAC_APIBKEY) {
arm_init_pauth_key(&env->apib_key);
}
if (arg2 & TARGET_PR_PAC_APDAKEY) {
arm_init_pauth_key(&env->apda_key);
}
if (arg2 & TARGET_PR_PAC_APDBKEY) {
arm_init_pauth_key(&env->apdb_key);
}
if (arg2 & TARGET_PR_PAC_APGAKEY) {
arm_init_pauth_key(&env->apga_key);
}
return 0;
}
}
return -TARGET_EINVAL;
#endif /* AARCH64 */
case PR_GET_SECCOMP:
case PR_SET_SECCOMP: