svn commit: r357591 - head/sys/riscv/include
John Baldwin
jhb at FreeBSD.org
Wed Feb 5 20:06:36 UTC 2020
Author: jhb
Date: Wed Feb 5 20:06:35 2020
New Revision: 357591
URL: https://svnweb.freebsd.org/changeset/base/357591
Log:
Read the breakpoint instruction to determine its length in BKPT_SKIP.
This fixes continuing from debug.kdb.enter=1 after enabling the use of
compressed instructions since the compiler can emit the two byte
c.ebreak instead of the 4 byte ebreak.
Reviewed by: br
MFC after: 1 week
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D23507
Modified:
head/sys/riscv/include/db_machdep.h
Modified: head/sys/riscv/include/db_machdep.h
==============================================================================
--- head/sys/riscv/include/db_machdep.h Wed Feb 5 19:39:48 2020 (r357590)
+++ head/sys/riscv/include/db_machdep.h Wed Feb 5 20:06:35 2020 (r357591)
@@ -53,8 +53,14 @@ typedef long db_expr_t;
#define BKPT_SIZE (INSN_SIZE)
#define BKPT_SET(inst) (BKPT_INST)
-#define BKPT_SKIP do { \
- kdb_frame->tf_sepc += BKPT_SIZE; \
+#define BKPT_SKIP do { \
+ uint32_t _instr; \
+ \
+ _instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \
+ if ((_instr & 0x3) == 0x3) \
+ kdb_frame->tf_sepc += 4; /* ebreak */ \
+ else \
+ kdb_frame->tf_sepc += 2; /* c.ebreak */ \
} while (0)
#define db_clear_single_step kdb_cpu_clear_singlestep
More information about the svn-src-all
mailing list