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 $pc" crashes like this: #0 0x0000555555caa01f in mon_get_cpu_sync (mon=0x0, synchronize=true) at ../monitor/misc.c:270 #1 0x0000555555caa141 in mon_get_cpu (mon=0x0) at ../monitor/misc.c:294 #2 0x0000555555caa158 in mon_get_cpu_env () at ../monitor/misc.c:299 qemu#3 0x0000555555b19739 in monitor_get_pc (mon=0x555556ad2de0, md=0x5555565d2d40 <monitor_defs+1152>, val=0) at ../target/i386/monitor.c:607 qemu#4 0x0000555555cadbec in get_monitor_def (mon=0x555556ad2de0, pval=0x7fffffffc208, name=0x7fffffffc220 "pc") at ../monitor/misc.c:1681 qemu#5 0x000055555582ec4f in expr_unary (mon=0x555556ad2de0) at ../monitor/hmp.c:387 qemu#6 0x000055555582edbb in expr_prod (mon=0x555556ad2de0) at ../monitor/hmp.c:421 qemu#7 0x000055555582ee79 in expr_logic (mon=0x555556ad2de0) at ../monitor/hmp.c:455 qemu#8 0x000055555582eefe in expr_sum (mon=0x555556ad2de0) at ../monitor/hmp.c:484 qemu#9 0x000055555582efe8 in get_expr (mon=0x555556ad2de0, pval=0x7fffffffc418, pp=0x7fffffffc408) at ../monitor/hmp.c:511 qemu#10 0x000055555582fcd4 in monitor_parse_arguments (mon=0x555556ad2de0, endp=0x7fffffffc890, cmd=0x555556675b50 <hmp_cmds+7920>) at ../monitor/hmp.c:876 qemu#11 0x00005555558306a8 in handle_hmp_command (mon=0x555556ad2de0, cmdline=0x555556ada452 "$pc") at ../monitor/hmp.c:1087 qemu#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: ff04108 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>
elmarco · Nov 13, 2020 · e7cff9c · e7cff9c
1 parent 43cf067
commit e7cff9c
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Showing 10 changed files with 20 additions and 20 deletions.
diff --git a/include/monitor/hmp-target.h b/include/monitor/hmp-target.h
@@ -41,7 +41,7 @@ struct MonitorDef {
 const MonitorDef *target_monitor_defs(void);
 int target_get_monitor_def(CPUState *cs, const char *name, uint64_t *pval);
 
-CPUArchState *mon_get_cpu_env(void);
+CPUArchState *mon_get_cpu_env(Monitor *mon);
 CPUState *mon_get_cpu(Monitor *mon);
 
 void hmp_info_mem(Monitor *mon, const QDict *qdict);

diff --git a/monitor/misc.c b/monitor/misc.c
@@ -294,9 +294,9 @@ CPUState *mon_get_cpu(Monitor *mon)
     return mon_get_cpu_sync(mon, true);
 }
 
-CPUArchState *mon_get_cpu_env(void)
+CPUArchState *mon_get_cpu_env(Monitor *mon)
 {
-    CPUState *cs = mon_get_cpu(monitor_cur());
+    CPUState *cs = mon_get_cpu(mon);
 
     return cs ? cs->env_ptr : NULL;
 }
@@ -1680,7 +1680,7 @@ int get_monitor_def(Monitor *mon, int64_t *pval, const char *name)
             if (md->get_value) {
                 *pval = md->get_value(mon, md, md->offset);
             } else {
-                CPUArchState *env = mon_get_cpu_env();
+                CPUArchState *env = mon_get_cpu_env(mon);
                 ptr = (uint8_t *)env + md->offset;
                 switch(md->type) {
                 case MD_I32:

diff --git a/target/i386/monitor.c b/target/i386/monitor.c
@@ -222,7 +222,7 @@ void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
     CPUArchState *env;
 
-    env = mon_get_cpu_env();
+    env = mon_get_cpu_env(mon);
     if (!env) {
         monitor_printf(mon, "No CPU available\n");
         return;
@@ -550,7 +550,7 @@ void hmp_info_mem(Monitor *mon, const QDict *qdict)
 {
     CPUArchState *env;
 
-    env = mon_get_cpu_env();
+    env = mon_get_cpu_env(mon);
     if (!env) {
         monitor_printf(mon, "No CPU available\n");
         return;
@@ -604,7 +604,7 @@ void hmp_mce(Monitor *mon, const QDict *qdict)
 static target_long monitor_get_pc(Monitor *mon, const struct MonitorDef *md,
                                   int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     return env->eip + env->segs[R_CS].base;
 }
 

diff --git a/target/m68k/monitor.c b/target/m68k/monitor.c
@@ -12,7 +12,7 @@
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env1 = mon_get_cpu_env();
+    CPUArchState *env1 = mon_get_cpu_env(mon);
 
     if (!env1) {
         monitor_printf(mon, "No CPU available\n");

diff --git a/target/nios2/monitor.c b/target/nios2/monitor.c
@@ -29,7 +29,7 @@
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env1 = mon_get_cpu_env();
+    CPUArchState *env1 = mon_get_cpu_env(mon);
 
     dump_mmu(env1);
 }
diff --git a/target/ppc/monitor.c b/target/ppc/monitor.c
@@ -32,7 +32,7 @@
 static target_long monitor_get_ccr(Monitor *mon, const struct MonitorDef *md,
                                    int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     unsigned int u;
     int i;
 
@@ -47,27 +47,27 @@ static target_long monitor_get_ccr(Monitor *mon, const struct MonitorDef *md,
 static target_long monitor_get_decr(Monitor *mon, const struct MonitorDef *md,
                                     int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     return cpu_ppc_load_decr(env);
 }
 
 static target_long monitor_get_tbu(Monitor *mon, const struct MonitorDef *md,
                                    int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     return cpu_ppc_load_tbu(env);
 }
 
 static target_long monitor_get_tbl(Monitor *mon, const struct MonitorDef *md,
                                    int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     return cpu_ppc_load_tbl(env);
 }
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env1 = mon_get_cpu_env();
+    CPUArchState *env1 = mon_get_cpu_env(mon);
 
     if (!env1) {
         monitor_printf(mon, "No CPU available\n");

diff --git a/target/riscv/monitor.c b/target/riscv/monitor.c
@@ -204,7 +204,7 @@ void hmp_info_mem(Monitor *mon, const QDict *qdict)
 {
     CPUArchState *env;
 
-    env = mon_get_cpu_env();
+    env = mon_get_cpu_env(mon);
     if (!env) {
         monitor_printf(mon, "No CPU available\n");
         return;

diff --git a/target/sh4/monitor.c b/target/sh4/monitor.c
@@ -41,7 +41,7 @@ static void print_tlb(Monitor *mon, int idx, tlb_t *tlb)
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     int i;
 
     if (!env) {

diff --git a/target/sparc/monitor.c b/target/sparc/monitor.c
@@ -30,7 +30,7 @@
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env1 = mon_get_cpu_env();
+    CPUArchState *env1 = mon_get_cpu_env(mon);
 
     if (!env1) {
         monitor_printf(mon, "No CPU available\n");
@@ -43,7 +43,7 @@ void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 static target_long monitor_get_psr(Monitor *mon, const struct MonitorDef *md,
                                    int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
 
     return cpu_get_psr(env);
 }
@@ -52,7 +52,7 @@ static target_long monitor_get_psr(Monitor *mon, const struct MonitorDef *md,
 static target_long monitor_get_reg(Monitor *mon, const struct MonitorDef *md,
                                    int val)
 {
-    CPUArchState *env = mon_get_cpu_env();
+    CPUArchState *env = mon_get_cpu_env(mon);
     return env->regwptr[val];
 }
 

diff --git a/target/xtensa/monitor.c b/target/xtensa/monitor.c
@@ -29,7 +29,7 @@
 
 void hmp_info_tlb(Monitor *mon, const QDict *qdict)
 {
-    CPUArchState *env1 = mon_get_cpu_env();
+    CPUArchState *env1 = mon_get_cpu_env(mon);
 
     if (!env1) {
         monitor_printf(mon, "No CPU available\n");