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bbade20633
Currently, the RTAS time of day functions only partially validate the number of parameters they receive and return. Because of how the parameters are used, this is unlikely to lead to a crash, but it's messy. This patch adds the missing checks. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* RTAS Real Time Clock
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*
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* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
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* Copyright 2014 David Gibson, Red Hat.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "cpu.h"
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#include "hw/ppc/spapr.h"
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#include "qapi-event.h"
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static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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struct tm tm;
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if ((nargs != 0) || (nret != 8)) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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qemu_get_timedate(&tm, spapr->rtc_offset);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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rtas_st(rets, 1, tm.tm_year + 1900);
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rtas_st(rets, 2, tm.tm_mon + 1);
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rtas_st(rets, 3, tm.tm_mday);
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rtas_st(rets, 4, tm.tm_hour);
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rtas_st(rets, 5, tm.tm_min);
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rtas_st(rets, 6, tm.tm_sec);
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rtas_st(rets, 7, 0); /* we don't do nanoseconds */
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}
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static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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struct tm tm;
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if ((nargs != 7) || (nret != 1)) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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tm.tm_year = rtas_ld(args, 0) - 1900;
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tm.tm_mon = rtas_ld(args, 1) - 1;
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tm.tm_mday = rtas_ld(args, 2);
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tm.tm_hour = rtas_ld(args, 3);
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tm.tm_min = rtas_ld(args, 4);
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tm.tm_sec = rtas_ld(args, 5);
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/* Just generate a monitor event for the change */
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qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort);
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spapr->rtc_offset = qemu_timedate_diff(&tm);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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void spapr_rtc_init(void)
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{
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spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day",
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rtas_get_time_of_day);
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spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day",
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rtas_set_time_of_day);
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}
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