diff options
Diffstat (limited to 'arch/blackfin/mach-common/entry.S')
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 038f70e0be65..847c172a99eb 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -43,7 +43,7 @@ #include <asm/asm-offsets.h> #include <asm/trace.h> -#include <asm/mach-common/context.S> +#include <asm/context.S> #if defined(CONFIG_BFIN_SCRATCH_REG_RETN) # define EX_SCRATCH_REG RETN @@ -158,6 +158,39 @@ ENTRY(_ex_single_step) cc = r7 == r6; if cc jump _bfin_return_from_exception; +#ifdef CONFIG_KGDB + /* Don't do single step in hardware exception handler */ + p5.l = lo(IPEND); + p5.h = hi(IPEND); + r6 = [p5]; + cc = bittst(r6, 4); + if cc jump _bfin_return_from_exception; + cc = bittst(r6, 5); + if cc jump _bfin_return_from_exception; + + /* skip single step if current interrupt priority is higher than + * that of the first instruction, from which gdb starts single step */ + r6 >>= 6; + r7 = 10; +.Lfind_priority_start: + cc = bittst(r6, 0); + if cc jump .Lfind_priority_done; + r6 >>= 1; + r7 += -1; + cc = r7 == 0; + if cc jump .Lfind_priority_done; + jump.s .Lfind_priority_start; +.Lfind_priority_done: + p4.l = _debugger_step; + p4.h = _debugger_step; + r6 = [p4]; + cc = r6 == 0; + if cc jump .Ldo_single_step; + r6 += -1; + cc = r6 < r7; + if cc jump 1f; +.Ldo_single_step: +#else /* If we were in user mode, do the single step normally. */ p5.l = lo(IPEND); p5.h = hi(IPEND); @@ -166,6 +199,7 @@ ENTRY(_ex_single_step) r7 = r7 & r6; cc = r7 == 0; if !cc jump 1f; +#endif /* Single stepping only a single instruction, so clear the trace * bit here. */ @@ -1388,6 +1422,12 @@ ENTRY(_sys_call_table) .long _sys_semtimedop .long _sys_timerfd_settime .long _sys_timerfd_gettime + .long _sys_signalfd4 /* 360 */ + .long _sys_eventfd2 + .long _sys_epoll_create1 + .long _sys_dup3 + .long _sys_pipe2 + .long _sys_inotify_init1 /* 365 */ .rept NR_syscalls-(.-_sys_call_table)/4 .long _sys_ni_syscall |