armv8_dpm: do not read/write non-existent registers

Change-Id: I0f3fffa8cf1746569f6acce0233e9544d3862f51
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/6062
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

diff --git a/src/target/armv8_dpm.c b/src/target/armv8_dpm.c
index 6ef8c33de2d07fa6e34559fbab98cab54d4e92f9..b36ef835c0300cd08abd6aa16e381c8543e2d0f1 100644 (file)
--- a/src/target/armv8_dpm.c
+++ b/src/target/armv8_dpm.c
@@ -782,7 +782,7 @@ int armv8_dpm_read_current_registers(struct arm_dpm *dpm)
                struct arm_reg *arm_reg;
 
                r = armv8_reg_current(arm, i);
-               if (r->valid)
+               if (!r->exist || r->valid)
                        continue;
 
                /* Skip reading FP-SIMD registers */
@@ -922,6 +922,9 @@ int armv8_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
        for (unsigned i = 1; i < cache->num_regs; i++) {
                struct arm_reg *r;
 
+               /* skip non-existent */
+               if (!cache->reg_list[i].exist)
+                       continue;
                /* skip PC and CPSR */
                if (i == ARMV8_PC || i == ARMV8_xPSR)
                        continue;
@@ -1047,7 +1050,7 @@ static int armv8_dpm_full_context(struct target *target)
                for (unsigned i = 0; i < cache->num_regs; i++) {
                        struct arm_reg *r;
 
-                       if (cache->reg_list[i].valid)
+                       if (!cache->reg_list[i].exist || cache->reg_list[i].valid)
                                continue;
                        r = cache->reg_list[i].arch_info;