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

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>
bscan_tunnel
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;