| /* ********************************************************** |
| * Copyright (c) 2022 Rivos, Inc. All rights reserved. |
| * **********************************************************/ |
| |
| /* |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of Rivos, Inc. nor the names of its contributors may be |
| * used to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL RIVOS, INC. OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| /*************************************************************************** |
| * RISC-V-specific assembly and trampoline code, shared with non-core-DR-lib |
| */ |
| |
| #include "../asm_defines.asm" |
| START_FILE |
| |
| #ifndef LINUX |
| # error Non-Linux is not supported |
| #endif |
| |
| #include "include/syscall.h" |
| |
| DECL_EXTERN(unexpected_return) |
| |
| /* |
| * ptr_int_t dynamorio_syscall(uint sysnum, uint num_args, ...); |
| * |
| * Linux riscv64 system call: |
| * - a7: syscall number |
| * - a0..a5: syscall arguments |
| */ |
| DECLARE_FUNC(dynamorio_syscall) |
| GLOBAL_LABEL(dynamorio_syscall:) |
| mv t0,a0 |
| mv a0,a2 |
| mv a1,a3 |
| mv a2,a4 |
| mv a3,a5 |
| mv a4,a6 |
| mv a5,a7 |
| mv a7,t0 |
| ecall |
| ret |
| |
| #define FUNCNAME dr_fpu_exception_init |
| DECLARE_FUNC(FUNCNAME) |
| GLOBAL_LABEL(FUNCNAME:) |
| fsflags x0 |
| ret |
| END_FUNC(FUNCNAME) |
| #undef FUNCNAME |
| |
| /* |
| * thread_id_t dynamorio_clone(uint flags, byte *newsp, void *ptid, void *tls, |
| * void *ctid, void (*func)(void)) |
| * TODO i#6514: Add support for passing NULL for newsp. |
| */ |
| DECLARE_FUNC(dynamorio_clone) |
| GLOBAL_LABEL(dynamorio_clone:) |
| addi ARG2, ARG2, -16 /* Description: newsp = newsp - 16. */ |
| sd ARG6, 0 (ARG2) /* The func is now on TOS of newsp. */ |
| li SYSNUM_REG, SYS_clone /* All args are already in syscall registers.*/ |
| ecall |
| bnez ARG1, dynamorio_clone_parent |
| ld ARG1, 0 (sp) |
| addi sp, sp, 16 |
| jalr ARG1 |
| jal GLOBAL_REF(unexpected_return) |
| dynamorio_clone_parent: |
| ret |
| END_FUNC(dynamorio_clone) |
| |
| END_FILE |