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target: armv8: Add TARGET_HALTED check for gdb connect 

This commit adds TARGET_HALTED check in armv8_get_core_reg32()
and armv8_set_core_reg32() to void a crash issue when gdb connects
but fails to halt the ARM core. Similar logic can be found in
armv8_get_core_reg() and armv8_set_core_reg().

Below is the call stack information of this case when gdb connects.

(gdb) bt
    regnum=regnum@entry=0, dpm=0x990110) at src/target/armv8_dpm.c:657
    r=0x9c7240, regnum=0, mode=<optimized out>) at src/target/armv8_dpm.c:974
    at src/target/armv8.c:1487
    packet=0x8ec8e0 <gdb_packet_buffer.9962> "g",
    packet_size=<optimized out>, connection=<optimized out>)
    at src/server/gdb_server.c:1200
    at src/server/gdb_server.c:3180
    command_context=command_context@entry=0x935010)
    at src/server/server.c:566
...

Change-Id: I159837b533f110998184f910a0abe48409bd58f1
Signed-off-by: Liming Sun <lsun@mellanox.com>
Reviewed-on: http://openocd.zylin.com/4758
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
This commit is contained in:
Liming Sun 2018-11-05 10:26:05 -05:00 committed by Matthias Welwarsky
parent bff87a7f28
commit 651998e337
1 changed files with 6 additions and 0 deletions
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6
src/target/armv8.c
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@ -1477,6 +1477,9 @@ static int armv8_get_core_reg32(struct reg *reg)
struct reg *reg64;
int retval;
if (target->state != TARGET_HALTED)
return ERROR_TARGET_NOT_HALTED;
/* get the corresponding Aarch64 register */
reg64 = cache->reg_list + armv8_reg->num;
if (reg64->valid) {
@ -1500,6 +1503,9 @@ static int armv8_set_core_reg32(struct reg *reg, uint8_t *buf)
struct reg *reg64 = cache->reg_list + armv8_reg->num;
uint32_t value = buf_get_u32(buf, 0, 32);
if (target->state != TARGET_HALTED)
return ERROR_TARGET_NOT_HALTED;
if (reg64 == arm->cpsr) {
armv8_set_cpsr(arm, value);
} else {