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x86_32_common: fix some warnings 

Mostly "Dead assignment" reported by Clang static analyzer.

Change-Id: Ibf81d2ba2462570ee3a40e57a60c55a1d1fa0c00
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/4351
Tested-by: jenkins
This commit is contained in:
Paul Fertser 2018-01-17 22:00:42 +03:00
parent dd890d4cad
commit fa86553e76
1 changed files with 28 additions and 15 deletions
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43
src/target/x86_32_common.c
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@ -209,15 +209,16 @@ static int read_phys_mem(struct target *t, uint32_t phys_address,
LOG_ERROR("%s invalid read size", __func__);
break;
}
if (retval != ERROR_OK)
break;
}
/* restore CR0.PG bit if needed (regardless of retval) */
if (pg_disabled) {
retval = x86_32->enable_paging(t);
if (retval != ERROR_OK) {
int retval2 = x86_32->enable_paging(t);
if (retval2 != ERROR_OK) {
LOG_ERROR("%s could not enable paging", __func__);
return retval;
return retval2;
}
pg_disabled = true;
}
/* TODO: After reading memory from target, we must replace
* software breakpoints with the original instructions again.
@ -364,6 +365,9 @@ static int read_mem(struct target *t, uint32_t size,
break;
}
if (retval != ERROR_OK)
return retval;
/* read_hw_reg() will write to 4 bytes (uint32_t)
* Watch out, the buffer passed into read_mem() might be 1 or 2 bytes.
*/
@ -436,6 +440,10 @@ static int write_mem(struct target *t, uint32_t size,
LOG_ERROR("%s invalid write mem size", __func__);
return ERROR_FAIL;
}
if (retval != ERROR_OK)
return retval;
retval = x86_32->transaction_status(t);
if (retval != ERROR_OK) {
LOG_ERROR("%s error on mem write", __func__);
@ -606,7 +614,6 @@ int x86_32_common_read_memory(struct target *t, target_addr_t addr,
&& x86_32_common_read_phys_mem(t, physaddr, size, count, buf) != ERROR_OK) {
LOG_ERROR("%s failed to read memory from physical address " TARGET_ADDR_FMT,
__func__, physaddr);
retval = ERROR_FAIL;
}
/* restore PG bit if it was cleared prior (regardless of retval) */
retval = x86_32->enable_paging(t);
@ -662,7 +669,6 @@ int x86_32_common_write_memory(struct target *t, target_addr_t addr,
&& x86_32_common_write_phys_mem(t, physaddr, size, count, buf) != ERROR_OK) {
LOG_ERROR("%s failed to write memory to physical address " TARGET_ADDR_FMT,
__func__, physaddr);
retval = ERROR_FAIL;
}
/* restore PG bit if it was cleared prior (regardless of retval) */
retval = x86_32->enable_paging(t);
@ -733,15 +739,19 @@ int x86_32_common_read_io(struct target *t, uint32_t addr,
LOG_ERROR("%s invalid read io size", __func__);
return ERROR_FAIL;
}
/* restore CR0.PG bit if needed */
if (pg_disabled) {
retval = x86_32->enable_paging(t);
if (retval != ERROR_OK) {
int retval2 = x86_32->enable_paging(t);
if (retval2 != ERROR_OK) {
LOG_ERROR("%s could not enable paging", __func__);
return retval;
return retval2;
}
pg_disabled = false;
}
if (retval != ERROR_OK)
return retval;
uint32_t regval = 0;
retval = x86_32->read_hw_reg(t, EAX, &regval, 0);
if (retval != ERROR_OK) {
@ -818,15 +828,19 @@ int x86_32_common_write_io(struct target *t, uint32_t addr,
LOG_ERROR("%s invalid write io size", __func__);
return ERROR_FAIL;
}
/* restore CR0.PG bit if needed */
if (pg_disabled) {
retval = x86_32->enable_paging(t);
if (retval != ERROR_OK) {
int retval2 = x86_32->enable_paging(t);
if (retval2 != ERROR_OK) {
LOG_ERROR("%s could not enable paging", __func__);
return retval;
return retval2;
}
pg_disabled = false;
}
if (retval != ERROR_OK)
return retval;
retval = x86_32->transaction_status(t);
if (retval != ERROR_OK) {
LOG_ERROR("%s error on io write", __func__);
@ -1141,7 +1155,6 @@ static int set_breakpoint(struct target *t, struct breakpoint *bp)
}
} else {
LOG_ERROR("%s core doesn't support SW breakpoints", __func__);
error = ERROR_FAIL;
return ERROR_FAIL;
}
}