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target/cortex_m: return error if breakpoint address is out of range

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If the "Flash Patch and Breakpoint" unit is rev.1 then it can only
accept breakpoint addresses below 0x1FFFFFFF.
Detailed info in "ARM v7-M Architecture Reference Manual", DDI0403E
at chapter "C1.11 Flash Patch and Breakpoint unit".

Print a message and return error if the address of hardware
breakpoint cannot be handled by the breakpoint unit.

Change-Id: I95c92b1f058f0dfc568bf03015f99e439b27c59b
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4535
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Christopher Head <chead@zaber.com>
This commit is contained in:
Antonio Borneo 2018-05-29 23:40:36 +02:00 committed by Tomas Vanek
parent 91c125a906
commit 541dcc2487
1 changed files with 4 additions and 0 deletions
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4
src/target/cortex_m.c
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@ -1137,6 +1137,10 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint
breakpoint->set = fp_num + 1;
fpcr_value = breakpoint->address | 1;
if (cortex_m->fp_rev == 0) {
if (breakpoint->address > 0x1FFFFFFF) {
LOG_ERROR("Cortex-M Flash Patch Breakpoint rev.1 cannot handle HW breakpoint above address 0x1FFFFFFE");
return ERROR_FAIL;
}
uint32_t hilo;
hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW;
fpcr_value = (fpcr_value & 0x1FFFFFFC) | hilo | 1;