arm_dpm: error propagation fixes

found by inspection

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

diff --git a/src/target/arm_dpm.c b/src/target/arm_dpm.c
index 4fbe5e3b07f314c20c4e9d13d2cb9e65391d5a54..012316bf8ad78e65be79874d95fe79ecb4239ef8 100644 (file)
--- a/src/target/arm_dpm.c
+++ b/src/target/arm_dpm.c
@@ -123,6 +123,8 @@ static int dpm_modeswitch(struct arm_dpm *dpm, enum arm_mode mode)
                cpsr = mode;
 
        retval = dpm->instr_write_data_r0(dpm, ARMV4_5_MSR_GP(0, 0xf, 0), cpsr);
+       if (retval != ERROR_OK)
+               return retval;
 
        if (dpm->instr_cpsr_sync)
                retval = dpm->instr_cpsr_sync(dpm);
@@ -211,6 +213,8 @@ static int dpm_write_reg(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
                retval = dpm->instr_write_data_r0(dpm,
                                ARMV4_5_MSR_GP(0, 0xf, regnum & 1),
                                value);
+               if (retval != ERROR_OK)
+                       return retval;
 
                if (regnum == 16 && dpm->instr_cpsr_sync)
                        retval = dpm->instr_cpsr_sync(dpm);
@@ -364,6 +368,8 @@ int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
 
                        retval = dpm_maybe_update_bpwp(dpm, bpwp, &dbp->bpwp,
                                        bp ? &bp->set : NULL);
+                       if (retval != ERROR_OK)
+                               goto done;
                }
        }
 
@@ -374,6 +380,8 @@ int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
 
                retval = dpm_maybe_update_bpwp(dpm, bpwp, &dwp->bpwp,
                                wp ? &wp->set : NULL);
+               if (retval != ERROR_OK)
+                       goto done;
        }
 
        /* NOTE:  writes to breakpoint and watchpoint registers might
@@ -433,7 +441,11 @@ int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
 
                                /* REVISIT error checks */
                                if (tmode != ARM_MODE_ANY)
+                               {
                                        retval = dpm_modeswitch(dpm, tmode);
+                                       if (retval != ERROR_OK)
+                                               goto done;
+                               }
                        }
                        if (r->mode != mode)
                                continue;
@@ -441,7 +453,8 @@ int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
                        retval = dpm_write_reg(dpm,
                                        &cache->reg_list[i],
                                        regnum);
-
+                       if (retval != ERROR_OK)
+                               goto done;
                }
 
        } while (did_write);
@@ -451,13 +464,19 @@ int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp)
         * defined, and must not write it before CPSR.
         */
        retval = dpm_modeswitch(dpm, ARM_MODE_ANY);
+       if (retval != ERROR_OK)
+               goto done;
        arm->cpsr->dirty = false;
 
        retval = dpm_write_reg(dpm, arm->pc, 15);
+       if (retval != ERROR_OK)
+               goto done;
        arm->pc->dirty = false;
 
        /* flush R0 -- it's *very* dirty by now */
        retval = dpm_write_reg(dpm, &cache->reg_list[0], 0);
+       if (retval != ERROR_OK)
+               goto done;
        cache->reg_list[0].dirty = false;
 
        /* (void) */ dpm->finish(dpm);
@@ -540,6 +559,8 @@ static int arm_dpm_read_core_reg(struct target *target, struct reg *r,
        }
 
        retval = dpm_read_reg(dpm, r, regnum);
+       if (retval != ERROR_OK)
+               goto fail;
        /* always clean up, regardless of error */
 
        if (mode != ARM_MODE_ANY)
@@ -636,6 +657,8 @@ static int arm_dpm_full_context(struct target *target)
 
                                /* REVISIT error checks */
                                retval = dpm_modeswitch(dpm, mode);
+                               if (retval != ERROR_OK)
+                                       goto done;
                        }
                        if (r->mode != mode)
                                continue;
@@ -644,7 +667,8 @@ static int arm_dpm_full_context(struct target *target)
                        retval = dpm_read_reg(dpm,
                                        &cache->reg_list[i],
                                        (r->num == 16) ? 17 : r->num);
-
+                       if (retval != ERROR_OK)
+                               goto done;
                }
 
        } while (did_read);