The branch stable/13 has been updated by mhorne: URL: https://cgit.FreeBSD.org/src/commit/?id=08ce99c3f1b88d38a15b1f30a8b0934a582e119a
commit 08ce99c3f1b88d38a15b1f30a8b0934a582e119a Author: Mitchell Horne <[email protected]> AuthorDate: 2021-03-04 21:53:21 +0000 Commit: Mitchell Horne <[email protected]> CommitDate: 2021-04-21 13:20:33 +0000 arm64: implement kdb watchpoint functions Add wrappers around the debug_monitor interface, to be consumed by MI kernel debugger code. Update dbg_setup_watchpoint() and dbg_remove_watchpoint() to return specific error codes, not just -1. Reviewed by: jhb, kib, markj Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. (cherry picked from commit 3ef68bc62c1e3ca9c452177f5cb9fd4de0df590d) --- sys/arm64/arm64/debug_monitor.c | 41 +++++++++++++++++++++++++++++++++++------ sys/arm64/include/kdb.h | 2 ++ 2 files changed, 37 insertions(+), 6 deletions(-) diff --git a/sys/arm64/arm64/debug_monitor.c b/sys/arm64/arm64/debug_monitor.c index a2b4b7e8b40b..3a5a40925c92 100644 --- a/sys/arm64/arm64/debug_monitor.c +++ b/sys/arm64/arm64/debug_monitor.c @@ -226,6 +226,35 @@ kdb_cpu_clear_singlestep(void) } } +int +kdb_cpu_set_watchpoint(vm_offset_t addr, vm_size_t size, int access) +{ + enum dbg_access_t dbg_access; + + switch (access) { + case KDB_DBG_ACCESS_R: + dbg_access = HW_BREAKPOINT_R; + break; + case KDB_DBG_ACCESS_W: + dbg_access = HW_BREAKPOINT_W; + break; + case KDB_DBG_ACCESS_RW: + dbg_access = HW_BREAKPOINT_RW; + break; + default: + return (EINVAL); + } + + return (dbg_setup_watchpoint(NULL, addr, size, dbg_access)); +} + +int +kdb_cpu_clr_watchpoint(vm_offset_t addr, vm_size_t size) +{ + + return (dbg_remove_watchpoint(NULL, addr, size)); +} + static const char * dbg_watchtype_str(uint32_t type) { @@ -362,7 +391,7 @@ dbg_setup_watchpoint(struct debug_monitor_state *monitor, vm_offset_t addr, if (i == -1) { printf("Can not find slot for watchpoint, max %d" " watchpoints supported\n", dbg_watchpoint_num); - return (i); + return (EBUSY); } switch(size) { @@ -379,8 +408,8 @@ dbg_setup_watchpoint(struct debug_monitor_state *monitor, vm_offset_t addr, wcr_size = DBG_WATCH_CTRL_LEN_8; break; default: - printf("Unsupported address size for watchpoint\n"); - return (-1); + printf("Unsupported address size for watchpoint: %zu\n", size); + return (EINVAL); } if ((monitor->dbg_flags & DBGMON_KERNEL) == 0) @@ -402,8 +431,8 @@ dbg_setup_watchpoint(struct debug_monitor_state *monitor, vm_offset_t addr, wcr_access = DBG_WATCH_CTRL_LOAD | DBG_WATCH_CTRL_STORE; break; default: - printf("Unsupported exception level for watchpoint\n"); - return (-1); + printf("Unsupported access type for watchpoint: %d\n", access); + return (EINVAL); } monitor->dbg_wvr[i] = addr; @@ -427,7 +456,7 @@ dbg_remove_watchpoint(struct debug_monitor_state *monitor, vm_offset_t addr, i = dbg_find_slot(monitor, DBG_TYPE_WATCHPOINT, addr); if (i == -1) { printf("Can not find watchpoint for address 0%lx\n", addr); - return (i); + return (EINVAL); } monitor->dbg_wvr[i] = 0; diff --git a/sys/arm64/include/kdb.h b/sys/arm64/include/kdb.h index 2f7306ef669b..d5450dd2d67a 100644 --- a/sys/arm64/include/kdb.h +++ b/sys/arm64/include/kdb.h @@ -39,6 +39,8 @@ void kdb_cpu_clear_singlestep(void); void kdb_cpu_set_singlestep(void); +int kdb_cpu_set_watchpoint(vm_offset_t addr, size_t size, int access); +int kdb_cpu_clr_watchpoint(vm_offset_t addr, size_t size); static __inline void kdb_cpu_sync_icache(unsigned char *addr, size_t size) _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
