qemu/target/sparc/monitor.c
Kevin Wolf e7cff9c68d hmp: Pass monitor to mon_get_cpu_env()
mon_get_cpu_env() is indirectly called monitor_parse_arguments() where
the current monitor isn't set yet. Instead of using monitor_cur_env(),
explicitly pass the Monitor pointer to the function.

Without this fix, an HMP command like "x $pc" crashes like this:

  #0  0x0000555555caa01f in mon_get_cpu_sync (mon=0x0, synchronize=true) at ../monitor/misc.c:270
  #1  0x0000555555caa141 in mon_get_cpu (mon=0x0) at ../monitor/misc.c:294
  #2  0x0000555555caa158 in mon_get_cpu_env () at ../monitor/misc.c:299
  #3  0x0000555555b19739 in monitor_get_pc (mon=0x555556ad2de0, md=0x5555565d2d40 <monitor_defs+1152>, val=0) at ../target/i386/monitor.c:607
  #4  0x0000555555cadbec in get_monitor_def (mon=0x555556ad2de0, pval=0x7fffffffc208, name=0x7fffffffc220 "pc") at ../monitor/misc.c:1681
  #5  0x000055555582ec4f in expr_unary (mon=0x555556ad2de0) at ../monitor/hmp.c:387
  #6  0x000055555582edbb in expr_prod (mon=0x555556ad2de0) at ../monitor/hmp.c:421
  #7  0x000055555582ee79 in expr_logic (mon=0x555556ad2de0) at ../monitor/hmp.c:455
  #8  0x000055555582eefe in expr_sum (mon=0x555556ad2de0) at ../monitor/hmp.c:484
  #9  0x000055555582efe8 in get_expr (mon=0x555556ad2de0, pval=0x7fffffffc418, pp=0x7fffffffc408) at ../monitor/hmp.c:511
  #10 0x000055555582fcd4 in monitor_parse_arguments (mon=0x555556ad2de0, endp=0x7fffffffc890, cmd=0x555556675b50 <hmp_cmds+7920>) at ../monitor/hmp.c:876
  #11 0x00005555558306a8 in handle_hmp_command (mon=0x555556ad2de0, cmdline=0x555556ada452 "$pc") at ../monitor/hmp.c:1087
  #12 0x000055555582df14 in monitor_command_cb (opaque=0x555556ad2de0, cmdline=0x555556ada450 "x $pc", readline_opaque=0x0) at ../monitor/hmp.c:47

After this fix, nothing is left in monitor_parse_arguments() that can
indirectly call monitor_cur(), so the fix is complete.

Fixes: ff04108a0e
Reported-by: lichun <lichun@ruijie.com.cn>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20201113114326.97663-4-kwolf@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2020-11-13 12:45:51 +00:00

166 lines
6.5 KiB
C

/*
* QEMU monitor
*
* Copyright (c) 2003-2004 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "monitor/monitor.h"
#include "monitor/hmp-target.h"
#include "monitor/hmp.h"
void hmp_info_tlb(Monitor *mon, const QDict *qdict)
{
CPUArchState *env1 = mon_get_cpu_env(mon);
if (!env1) {
monitor_printf(mon, "No CPU available\n");
return;
}
dump_mmu(env1);
}
#ifndef TARGET_SPARC64
static target_long monitor_get_psr(Monitor *mon, const struct MonitorDef *md,
int val)
{
CPUArchState *env = mon_get_cpu_env(mon);
return cpu_get_psr(env);
}
#endif
static target_long monitor_get_reg(Monitor *mon, const struct MonitorDef *md,
int val)
{
CPUArchState *env = mon_get_cpu_env(mon);
return env->regwptr[val];
}
const MonitorDef monitor_defs[] = {
{ "g0", offsetof(CPUSPARCState, gregs[0]) },
{ "g1", offsetof(CPUSPARCState, gregs[1]) },
{ "g2", offsetof(CPUSPARCState, gregs[2]) },
{ "g3", offsetof(CPUSPARCState, gregs[3]) },
{ "g4", offsetof(CPUSPARCState, gregs[4]) },
{ "g5", offsetof(CPUSPARCState, gregs[5]) },
{ "g6", offsetof(CPUSPARCState, gregs[6]) },
{ "g7", offsetof(CPUSPARCState, gregs[7]) },
{ "o0", 0, monitor_get_reg },
{ "o1", 1, monitor_get_reg },
{ "o2", 2, monitor_get_reg },
{ "o3", 3, monitor_get_reg },
{ "o4", 4, monitor_get_reg },
{ "o5", 5, monitor_get_reg },
{ "o6", 6, monitor_get_reg },
{ "o7", 7, monitor_get_reg },
{ "l0", 8, monitor_get_reg },
{ "l1", 9, monitor_get_reg },
{ "l2", 10, monitor_get_reg },
{ "l3", 11, monitor_get_reg },
{ "l4", 12, monitor_get_reg },
{ "l5", 13, monitor_get_reg },
{ "l6", 14, monitor_get_reg },
{ "l7", 15, monitor_get_reg },
{ "i0", 16, monitor_get_reg },
{ "i1", 17, monitor_get_reg },
{ "i2", 18, monitor_get_reg },
{ "i3", 19, monitor_get_reg },
{ "i4", 20, monitor_get_reg },
{ "i5", 21, monitor_get_reg },
{ "i6", 22, monitor_get_reg },
{ "i7", 23, monitor_get_reg },
{ "pc", offsetof(CPUSPARCState, pc) },
{ "npc", offsetof(CPUSPARCState, npc) },
{ "y", offsetof(CPUSPARCState, y) },
#ifndef TARGET_SPARC64
{ "psr", 0, &monitor_get_psr, },
{ "wim", offsetof(CPUSPARCState, wim) },
#endif
{ "tbr", offsetof(CPUSPARCState, tbr) },
{ "fsr", offsetof(CPUSPARCState, fsr) },
{ "f0", offsetof(CPUSPARCState, fpr[0].l.upper) },
{ "f1", offsetof(CPUSPARCState, fpr[0].l.lower) },
{ "f2", offsetof(CPUSPARCState, fpr[1].l.upper) },
{ "f3", offsetof(CPUSPARCState, fpr[1].l.lower) },
{ "f4", offsetof(CPUSPARCState, fpr[2].l.upper) },
{ "f5", offsetof(CPUSPARCState, fpr[2].l.lower) },
{ "f6", offsetof(CPUSPARCState, fpr[3].l.upper) },
{ "f7", offsetof(CPUSPARCState, fpr[3].l.lower) },
{ "f8", offsetof(CPUSPARCState, fpr[4].l.upper) },
{ "f9", offsetof(CPUSPARCState, fpr[4].l.lower) },
{ "f10", offsetof(CPUSPARCState, fpr[5].l.upper) },
{ "f11", offsetof(CPUSPARCState, fpr[5].l.lower) },
{ "f12", offsetof(CPUSPARCState, fpr[6].l.upper) },
{ "f13", offsetof(CPUSPARCState, fpr[6].l.lower) },
{ "f14", offsetof(CPUSPARCState, fpr[7].l.upper) },
{ "f15", offsetof(CPUSPARCState, fpr[7].l.lower) },
{ "f16", offsetof(CPUSPARCState, fpr[8].l.upper) },
{ "f17", offsetof(CPUSPARCState, fpr[8].l.lower) },
{ "f18", offsetof(CPUSPARCState, fpr[9].l.upper) },
{ "f19", offsetof(CPUSPARCState, fpr[9].l.lower) },
{ "f20", offsetof(CPUSPARCState, fpr[10].l.upper) },
{ "f21", offsetof(CPUSPARCState, fpr[10].l.lower) },
{ "f22", offsetof(CPUSPARCState, fpr[11].l.upper) },
{ "f23", offsetof(CPUSPARCState, fpr[11].l.lower) },
{ "f24", offsetof(CPUSPARCState, fpr[12].l.upper) },
{ "f25", offsetof(CPUSPARCState, fpr[12].l.lower) },
{ "f26", offsetof(CPUSPARCState, fpr[13].l.upper) },
{ "f27", offsetof(CPUSPARCState, fpr[13].l.lower) },
{ "f28", offsetof(CPUSPARCState, fpr[14].l.upper) },
{ "f29", offsetof(CPUSPARCState, fpr[14].l.lower) },
{ "f30", offsetof(CPUSPARCState, fpr[15].l.upper) },
{ "f31", offsetof(CPUSPARCState, fpr[15].l.lower) },
#ifdef TARGET_SPARC64
{ "f32", offsetof(CPUSPARCState, fpr[16]) },
{ "f34", offsetof(CPUSPARCState, fpr[17]) },
{ "f36", offsetof(CPUSPARCState, fpr[18]) },
{ "f38", offsetof(CPUSPARCState, fpr[19]) },
{ "f40", offsetof(CPUSPARCState, fpr[20]) },
{ "f42", offsetof(CPUSPARCState, fpr[21]) },
{ "f44", offsetof(CPUSPARCState, fpr[22]) },
{ "f46", offsetof(CPUSPARCState, fpr[23]) },
{ "f48", offsetof(CPUSPARCState, fpr[24]) },
{ "f50", offsetof(CPUSPARCState, fpr[25]) },
{ "f52", offsetof(CPUSPARCState, fpr[26]) },
{ "f54", offsetof(CPUSPARCState, fpr[27]) },
{ "f56", offsetof(CPUSPARCState, fpr[28]) },
{ "f58", offsetof(CPUSPARCState, fpr[29]) },
{ "f60", offsetof(CPUSPARCState, fpr[30]) },
{ "f62", offsetof(CPUSPARCState, fpr[31]) },
{ "asi", offsetof(CPUSPARCState, asi) },
{ "pstate", offsetof(CPUSPARCState, pstate) },
{ "cansave", offsetof(CPUSPARCState, cansave) },
{ "canrestore", offsetof(CPUSPARCState, canrestore) },
{ "otherwin", offsetof(CPUSPARCState, otherwin) },
{ "wstate", offsetof(CPUSPARCState, wstate) },
{ "cleanwin", offsetof(CPUSPARCState, cleanwin) },
{ "fprs", offsetof(CPUSPARCState, fprs) },
#endif
{ NULL },
};
const MonitorDef *target_monitor_defs(void)
{
return monitor_defs;
}