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aarch64: fix debug entry from EL0

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If we enter debug state from EL0, some registers are not accessible.
Temporarily move to EL1H and back to gain access. Also, fix
armv8_dpm_modeswitch() to not immediately restore the previous state
on elevating the privilege level.

Change-Id: Ic2a92109230ff4eb6834c00ef544397a5b7ad56a
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4461
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
This commit is contained in:
Matthias Welwarsky
2018-03-12 16:56:05 +01:00
committed by Matthias Welwarsky
parent 935f0c5cc2
commit ffd6b78a2c
5 changed files with 26 additions and 7 deletions
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4
src/target/aarch64.c
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@@ -1861,7 +1861,7 @@ static int aarch64_write_cpu_memory(struct target *target,
if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
/* Abort occurred - clear it and exit */
LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
armv8_dpm_handle_exception(dpm);
armv8_dpm_handle_exception(dpm, true);
return ERROR_FAIL;
}
@@ -2080,7 +2080,7 @@ static int aarch64_read_cpu_memory(struct target *target,
if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
/* Abort occurred - clear it and exit */
LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
armv8_dpm_handle_exception(dpm);
armv8_dpm_handle_exception(dpm, true);
return ERROR_FAIL;
}