147ae93cdSMichael Clark #define xRA 1 /* return address (aka link register) */ 247ae93cdSMichael Clark #define xSP 2 /* stack pointer */ 347ae93cdSMichael Clark #define xGP 3 /* global pointer */ 447ae93cdSMichael Clark #define xTP 4 /* thread pointer */ 547ae93cdSMichael Clark 647ae93cdSMichael Clark #define xA0 10 /* gpr[10-17] are syscall arguments */ 747ae93cdSMichael Clark #define xA1 11 847ae93cdSMichael Clark #define xA2 12 947ae93cdSMichael Clark #define xA3 13 1047ae93cdSMichael Clark #define xA4 14 1147ae93cdSMichael Clark #define xA5 15 1247ae93cdSMichael Clark #define xA6 16 13*5836c3ecSKito Cheng #define xA7 17 /* syscall number for RVI ABI */ 14*5836c3ecSKito Cheng #define xT0 5 /* syscall number for RVE ABI */ 15