1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2023 Andes Technology Corporation 4 * Copyright 2022-2023 NXP 5 * Copyright (c) 2014-2022, Linaro Limited 6 * Copyright (c) 2020, Arm Limited 7 */ 8 9 #include <kernel/abort.h> 10 #include <kernel/scall.h> 11 #include <kernel/thread.h> 12 #include <kernel/trace_ta.h> 13 #include <kernel/user_ta.h> 14 #include <mm/vm.h> 15 #include <riscv.h> 16 #include <types_ext.h> 17 18 #define TA_CONTEXT_MAX_SIZE (RISCV_XLEN_BYTES * 32) 19 20 #ifdef CFG_UNWIND 21 22 /* Get register values pushed onto the stack by _utee_panic() */ 23 static void save_panic_regs_rv_ta(struct thread_specific_data *tsd, 24 unsigned long *pushed) 25 { 26 tsd->abort_regs = (struct thread_abort_regs){ 27 .sp = (unsigned long)pushed, 28 #if defined(RV32) 29 .s0 = pushed[2], 30 .epc = pushed[3], 31 #elif defined(RV64) 32 .s0 = pushed[0], 33 .epc = pushed[1], 34 #endif 35 }; 36 } 37 38 void scall_save_panic_stack(struct thread_scall_regs *regs) 39 { 40 struct thread_specific_data *tsd = thread_get_tsd(); 41 struct ts_session *s = ts_get_current_session(); 42 struct user_ta_ctx *utc = to_user_ta_ctx(s->ctx); 43 44 if (vm_check_access_rights(&utc->uctx, 45 TEE_MEMORY_ACCESS_READ | 46 TEE_MEMORY_ACCESS_WRITE, 47 (uaddr_t)regs->a1, 48 TA_CONTEXT_MAX_SIZE)) { 49 TAMSG_RAW(""); 50 TAMSG_RAW("Can't unwind invalid user stack 0x%"PRIxUA, 51 (uaddr_t)regs->a1); 52 return; 53 } 54 55 tsd->abort_type = ABORT_TYPE_USER_MODE_PANIC; 56 tsd->abort_descr = 0; 57 tsd->abort_va = 0; 58 59 save_panic_regs_rv_ta(tsd, (unsigned long *)regs->a1); 60 } 61 62 #else /* CFG_UNWIND */ 63 void scall_save_panic_stack(struct thread_scall_regs *regs __unused) 64 { 65 struct thread_specific_data *tsd = thread_get_tsd(); 66 67 tsd->abort_type = ABORT_TYPE_USER_MODE_PANIC; 68 } 69 #endif /* CFG_UNWIND */ 70