The branch main has been updated by andrew:
URL:
https://cgit.FreeBSD.org/src/commit/?id=0adc959a37303939e6c64cbeea47a62670bfaf58
commit 0adc959a37303939e6c64cbeea47a62670bfaf58
Author: Andrew Turner <and...@freebsd.org>
AuthorDate: 2024-03-14 15:09:03 +0000
Commit: Andrew Turner <and...@freebsd.org>
CommitDate: 2024-04-12 09:32:55 +0000
sys/gdb: Support hardware breakpoints
Support the use of hardware breakpoints in the kernel gdb stub.
Reviewed by: jhb (earlier version)
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D44354
---
sys/gdb/gdb_main.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/sys/gdb/gdb_main.c b/sys/gdb/gdb_main.c
index 5567c12c2a9f..3e8ada42adac 100644
--- a/sys/gdb/gdb_main.c
+++ b/sys/gdb/gdb_main.c
@@ -267,6 +267,11 @@ nofeatures:
gdb_tx_str(";qXfer:threads:read+");
+#ifdef HAS_HW_BREAKPOINT
+ if ((*feat & GDB_HWBREAK) != 0)
+ gdb_tx_str(";hwbreak+");
+#endif
+
/*
* If the debugport is a reliable transport, request No Ack mode from
* the server. The server may or may not choose to enter No Ack mode.
@@ -648,6 +653,10 @@ gdb_z_insert(void)
(vm_size_t)length, KDB_DBG_ACCESS_RW);
break;
case '1': /* hardware breakpoint */
+#ifdef HAS_HW_BREAKPOINT
+ error = kdb_cpu_set_breakpoint((vm_offset_t)addr);
+ break;
+#endif
case '0': /* software breakpoint */
/* Not implemented. */
gdb_tx_empty();
@@ -692,6 +701,10 @@ gdb_z_remove(void)
(vm_size_t)length);
break;
case '1': /* hardware breakpoint */
+#ifdef HAS_HW_BREAKPOINT
+ error = kdb_cpu_clr_breakpoint((vm_offset_t)addr);
+ break;
+#endif
case '0': /* software breakpoint */
/* Not implemented. */
gdb_tx_empty();
