Author: markj
Date: Mon Dec 14 14:54:20 2020
New Revision: 368636
URL: https://svnweb.freebsd.org/changeset/base/368636
Log:
MFC r368414:
arm: Let the GDB stub write to SP, LR and GP registers
PR: 251463
Modified:
stable/12/sys/arm/arm/gdb_machdep.c
stable/12/sys/arm/include/gdb_machdep.h
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/arm/arm/gdb_machdep.c
==============================================================================
--- stable/12/sys/arm/arm/gdb_machdep.c Mon Dec 14 14:00:54 2020
(r368635)
+++ stable/12/sys/arm/arm/gdb_machdep.c Mon Dec 14 14:54:20 2020
(r368636)
@@ -98,11 +98,25 @@ gdb_cpu_getreg(int regnum, size_t *regsz)
void
gdb_cpu_setreg(int regnum, void *val)
{
+ if (kdb_thread != curthread)
+ return;
switch (regnum) {
case GDB_REG_PC:
- if (kdb_thread == curthread)
- kdb_frame->tf_pc = *(register_t *)val;
+ kdb_frame->tf_pc = *(register_t *)val;
+ break;
+ case GDB_REG_SP:
+ kdb_frame->tf_svc_sp = *(register_t *)val;
+ break;
+ case GDB_REG_LR:
+ kdb_frame->tf_svc_lr = *(register_t *)val;
+ break;
+ default:
+ /* Write to the general purpose registers r0-r12. */
+ if (regnum >= 0 && regnum <= 12) {
+ *(&kdb_frame->tf_r0 + regnum) = *(register_t *)val;
+ }
+ break;
}
}
Modified: stable/12/sys/arm/include/gdb_machdep.h
==============================================================================
--- stable/12/sys/arm/include/gdb_machdep.h Mon Dec 14 14:00:54 2020
(r368635)
+++ stable/12/sys/arm/include/gdb_machdep.h Mon Dec 14 14:54:20 2020
(r368636)
@@ -33,6 +33,8 @@
#define GDB_BUFSZ 400
#define GDB_NREGS 26
+#define GDB_REG_SP 13
+#define GDB_REG_LR 14
#define GDB_REG_PC 15
static __inline size_t
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