111538Sandreas.sandberg@arm.com/* 211538Sandreas.sandberg@arm.com * Copyright (c) 2016 ARM Limited 311538Sandreas.sandberg@arm.com * All rights reserved 411538Sandreas.sandberg@arm.com * 511538Sandreas.sandberg@arm.com * The license below extends only to copyright in the software and shall 611538Sandreas.sandberg@arm.com * not be construed as granting a license to any other intellectual 711538Sandreas.sandberg@arm.com * property including but not limited to intellectual property relating 811538Sandreas.sandberg@arm.com * to a hardware implementation of the functionality of the software 911538Sandreas.sandberg@arm.com * licensed hereunder. You may use the software subject to the license 1011538Sandreas.sandberg@arm.com * terms below provided that you ensure that this notice is replicated 1111538Sandreas.sandberg@arm.com * unmodified and in its entirety in all distributions of the software, 1211538Sandreas.sandberg@arm.com * modified or unmodified, in source code or in binary form. 1311538Sandreas.sandberg@arm.com * 1411538Sandreas.sandberg@arm.com * Redistribution and use in source and binary forms, with or without 1511538Sandreas.sandberg@arm.com * modification, are permitted provided that the following conditions are 1611538Sandreas.sandberg@arm.com * met: redistributions of source code must retain the above copyright 1711538Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer; 1811538Sandreas.sandberg@arm.com * redistributions in binary form must reproduce the above copyright 1911538Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer in the 2011538Sandreas.sandberg@arm.com * documentation and/or other materials provided with the distribution; 2111538Sandreas.sandberg@arm.com * neither the name of the copyright holders nor the names of its 2211538Sandreas.sandberg@arm.com * contributors may be used to endorse or promote products derived from 2311538Sandreas.sandberg@arm.com * this software without specific prior written permission. 2411538Sandreas.sandberg@arm.com * 2511538Sandreas.sandberg@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2611538Sandreas.sandberg@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2711538Sandreas.sandberg@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2811538Sandreas.sandberg@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2911538Sandreas.sandberg@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3011538Sandreas.sandberg@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3111538Sandreas.sandberg@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3211538Sandreas.sandberg@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3311538Sandreas.sandberg@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3411538Sandreas.sandberg@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3511538Sandreas.sandberg@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3611538Sandreas.sandberg@arm.com * 3711538Sandreas.sandberg@arm.com * Authors: Andreas Sandberg 3811538Sandreas.sandberg@arm.com */ 3911538Sandreas.sandberg@arm.com 4011538Sandreas.sandberg@arm.com#include "kern/linux/helpers.hh" 4111538Sandreas.sandberg@arm.com 4211538Sandreas.sandberg@arm.com#include "arch/isa_traits.hh" 4311538Sandreas.sandberg@arm.com#include "config/the_isa.hh" 4411538Sandreas.sandberg@arm.com#include "cpu/thread_context.hh" 4511538Sandreas.sandberg@arm.com#include "mem/fs_translating_port_proxy.hh" 4613893Sgabeblack@google.com#include "sim/byteswap.hh" 4711538Sandreas.sandberg@arm.com#include "sim/system.hh" 4811538Sandreas.sandberg@arm.com 4911538Sandreas.sandberg@arm.comstruct DmesgEntry { 5011538Sandreas.sandberg@arm.com uint64_t ts_nsec; 5111538Sandreas.sandberg@arm.com uint16_t len; 5211538Sandreas.sandberg@arm.com uint16_t text_len; 5311538Sandreas.sandberg@arm.com uint16_t dict_len; 5411538Sandreas.sandberg@arm.com uint8_t facility; 5511538Sandreas.sandberg@arm.com uint8_t flags; 5611538Sandreas.sandberg@arm.com} M5_ATTR_PACKED; 5711538Sandreas.sandberg@arm.com 5811538Sandreas.sandberg@arm.comstatic int 5911538Sandreas.sandberg@arm.comdumpDmesgEntry(const uint8_t *base, const uint8_t *end, std::ostream &os) 6011538Sandreas.sandberg@arm.com{ 6111538Sandreas.sandberg@arm.com const size_t max_length = end - base; 6211538Sandreas.sandberg@arm.com DmesgEntry de; 6311538Sandreas.sandberg@arm.com 6411538Sandreas.sandberg@arm.com if (max_length < sizeof(de)) { 6511538Sandreas.sandberg@arm.com warn("Malformed dmesg entry\n"); 6611538Sandreas.sandberg@arm.com return -1; 6711538Sandreas.sandberg@arm.com } 6811538Sandreas.sandberg@arm.com 6911538Sandreas.sandberg@arm.com memcpy(&de, base, sizeof(de)); 7011538Sandreas.sandberg@arm.com de.ts_nsec = TheISA::gtoh(de.ts_nsec); 7111538Sandreas.sandberg@arm.com de.len = TheISA::gtoh(de.len); 7211538Sandreas.sandberg@arm.com de.text_len = TheISA::gtoh(de.text_len); 7311538Sandreas.sandberg@arm.com 7411538Sandreas.sandberg@arm.com if (de.len < sizeof(de) || 7511538Sandreas.sandberg@arm.com max_length < de.len || 7611538Sandreas.sandberg@arm.com max_length < sizeof(DmesgEntry) + de.text_len) { 7711538Sandreas.sandberg@arm.com 7811538Sandreas.sandberg@arm.com warn("Malformed dmesg entry:\n"); 7911538Sandreas.sandberg@arm.com warn("\tMax length: %i\n", max_length); 8011538Sandreas.sandberg@arm.com warn("\tde.len: %i\n", de.len); 8111538Sandreas.sandberg@arm.com warn("\tde.text_len: %i\n", de.text_len); 8211538Sandreas.sandberg@arm.com return -1; 8311538Sandreas.sandberg@arm.com } 8411538Sandreas.sandberg@arm.com 8511538Sandreas.sandberg@arm.com ccprintf(os, "[%.6f] ", de.ts_nsec * 10e-9); 8611538Sandreas.sandberg@arm.com os.write((char *)base + sizeof(de), de.text_len); 8711538Sandreas.sandberg@arm.com os << std::endl; 8811538Sandreas.sandberg@arm.com 8911538Sandreas.sandberg@arm.com return de.len; 9011538Sandreas.sandberg@arm.com} 9111538Sandreas.sandberg@arm.com 9211538Sandreas.sandberg@arm.comvoid 9311538Sandreas.sandberg@arm.comLinux::dumpDmesg(ThreadContext *tc, std::ostream &os) 9411538Sandreas.sandberg@arm.com{ 9511538Sandreas.sandberg@arm.com System *system = tc->getSystemPtr(); 9611538Sandreas.sandberg@arm.com const SymbolTable *symtab = system->kernelSymtab; 9714021Sgabeblack@google.com PortProxy &proxy = tc->getVirtProxy(); 9811538Sandreas.sandberg@arm.com 9911538Sandreas.sandberg@arm.com Addr addr_lb = 0, addr_lb_len = 0, addr_first = 0, addr_next = 0; 10011538Sandreas.sandberg@arm.com const bool found_symbols = 10111538Sandreas.sandberg@arm.com symtab->findAddress("__log_buf", addr_lb) && 10211538Sandreas.sandberg@arm.com symtab->findAddress("log_buf_len", addr_lb_len) && 10311538Sandreas.sandberg@arm.com symtab->findAddress("log_first_idx", addr_first) && 10411538Sandreas.sandberg@arm.com symtab->findAddress("log_next_idx", addr_next); 10511538Sandreas.sandberg@arm.com 10611538Sandreas.sandberg@arm.com if (!found_symbols) { 10711538Sandreas.sandberg@arm.com warn("Failed to find kernel dmesg symbols.\n"); 10811538Sandreas.sandberg@arm.com return; 10911538Sandreas.sandberg@arm.com } 11011538Sandreas.sandberg@arm.com 11113893Sgabeblack@google.com uint32_t log_buf_len = 11213893Sgabeblack@google.com proxy.read<uint32_t>(addr_lb_len, TheISA::GuestByteOrder); 11313893Sgabeblack@google.com uint32_t log_first_idx = 11413893Sgabeblack@google.com proxy.read<uint32_t>(addr_first, TheISA::GuestByteOrder); 11513893Sgabeblack@google.com uint32_t log_next_idx = 11613893Sgabeblack@google.com proxy.read<uint32_t>(addr_next, TheISA::GuestByteOrder); 11711538Sandreas.sandberg@arm.com 11811538Sandreas.sandberg@arm.com if (log_first_idx >= log_buf_len || log_next_idx >= log_buf_len) { 11911538Sandreas.sandberg@arm.com warn("dmesg pointers/length corrupted\n"); 12011538Sandreas.sandberg@arm.com return; 12111538Sandreas.sandberg@arm.com } 12211538Sandreas.sandberg@arm.com 12311538Sandreas.sandberg@arm.com // Normalize and read the dmesg ring buffer 12411538Sandreas.sandberg@arm.com std::vector<uint8_t> log_buf(log_buf_len); 12511538Sandreas.sandberg@arm.com int length; 12611538Sandreas.sandberg@arm.com if (log_first_idx < log_next_idx) { 12711538Sandreas.sandberg@arm.com length = log_next_idx - log_first_idx; 12811538Sandreas.sandberg@arm.com if (length < 0 || length > log_buf.size()) { 12911538Sandreas.sandberg@arm.com warn("Unexpected dmesg buffer length\n"); 13011538Sandreas.sandberg@arm.com return; 13111538Sandreas.sandberg@arm.com } 13211538Sandreas.sandberg@arm.com proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length); 13311538Sandreas.sandberg@arm.com } else { 13411538Sandreas.sandberg@arm.com const int length_2 = log_buf_len - log_first_idx; 13511538Sandreas.sandberg@arm.com if (length_2 < 0 || length_2 + log_next_idx > log_buf.size()) { 13611538Sandreas.sandberg@arm.com warn("Unexpected dmesg buffer length\n"); 13711538Sandreas.sandberg@arm.com return; 13811538Sandreas.sandberg@arm.com } 13911538Sandreas.sandberg@arm.com length = log_buf_len; 14011538Sandreas.sandberg@arm.com proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length_2); 14111538Sandreas.sandberg@arm.com proxy.readBlob(addr_lb, log_buf.data() + length_2, log_next_idx); 14211538Sandreas.sandberg@arm.com } 14311538Sandreas.sandberg@arm.com 14411538Sandreas.sandberg@arm.com // Print dmesg buffer content 14511538Sandreas.sandberg@arm.com const uint8_t *cur = log_buf.data(), *end = log_buf.data() + length; 14611538Sandreas.sandberg@arm.com while (cur < end) { 14711538Sandreas.sandberg@arm.com int ret = dumpDmesgEntry(cur, end, os); 14811538Sandreas.sandberg@arm.com if (ret < 0) 14911538Sandreas.sandberg@arm.com return; 15011538Sandreas.sandberg@arm.com cur += ret; 15111538Sandreas.sandberg@arm.com } 15211538Sandreas.sandberg@arm.com} 153