diff options
Diffstat (limited to 'arch/metag/kernel/ftrace_stub.S')
-rw-r--r-- | arch/metag/kernel/ftrace_stub.S | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/metag/kernel/ftrace_stub.S b/arch/metag/kernel/ftrace_stub.S new file mode 100644 index 0000000..e70bff7 --- /dev/null +++ b/arch/metag/kernel/ftrace_stub.S @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2008 Imagination Technologies Ltd. + * Licensed under the GPL + * + */ + +#include <asm/ftrace.h> + + .text +#ifdef CONFIG_DYNAMIC_FTRACE + .global _mcount_wrapper + .type _mcount_wrapper,function +_mcount_wrapper: + MOV PC,D0.4 + + .global _ftrace_caller + .type _ftrace_caller,function +_ftrace_caller: + MOVT D0Re0,#HI(_function_trace_stop) + ADD D0Re0,D0Re0,#LO(_function_trace_stop) + GETD D0Re0,[D0Re0] + CMP D0Re0,#0 + BEQ $Lcall_stub + MOV PC,D0.4 +$Lcall_stub: + MSETL [A0StP], D0Ar6, D0Ar4, D0Ar2, D0.4 + MOV D1Ar1, D0.4 + MOV D0Ar2, D1RtP + SUB D1Ar1,D1Ar1,#MCOUNT_INSN_SIZE + + .global _ftrace_call +_ftrace_call: + MOVT D1RtP,#HI(_ftrace_stub) + CALL D1RtP,#LO(_ftrace_stub) + GETL D0.4, D1RtP, [A0StP++#(-8)] + GETL D0Ar2, D1Ar1, [A0StP++#(-8)] + GETL D0Ar4, D1Ar3, [A0StP++#(-8)] + GETL D0Ar6, D1Ar5, [A0StP++#(-8)] + MOV PC, D0.4 +#else + + .global _mcount_wrapper + .type _mcount_wrapper,function +_mcount_wrapper: + MOVT D0Re0,#HI(_function_trace_stop) + ADD D0Re0,D0Re0,#LO(_function_trace_stop) + GETD D0Re0,[D0Re0] + CMP D0Re0,#0 + BEQ $Lcall_mcount + MOV PC,D0.4 +$Lcall_mcount: + MSETL [A0StP], D0Ar6, D0Ar4, D0Ar2, D0.4 + MOV D1Ar1, D0.4 + MOV D0Ar2, D1RtP + MOVT D0Re0,#HI(_ftrace_trace_function) + ADD D0Re0,D0Re0,#LO(_ftrace_trace_function) + GET D1Ar3,[D0Re0] + MOVT D1Re0,#HI(_ftrace_stub) + ADD D1Re0,D1Re0,#LO(_ftrace_stub) + CMP D1Ar3,D1Re0 + BEQ $Ltrace_exit + MOV D1RtP,D1Ar3 + SUB D1Ar1,D1Ar1,#MCOUNT_INSN_SIZE + SWAP PC,D1RtP +$Ltrace_exit: + GETL D0.4, D1RtP, [A0StP++#(-8)] + GETL D0Ar2, D1Ar1, [A0StP++#(-8)] + GETL D0Ar4, D1Ar3, [A0StP++#(-8)] + GETL D0Ar6, D1Ar5, [A0StP++#(-8)] + MOV PC, D0.4 + +#endif /* CONFIG_DYNAMIC_FTRACE */ + + .global _ftrace_stub +_ftrace_stub: + MOV PC,D1RtP |