From: Andreas Krebbel Date: Wed, 4 Mar 2020 12:29:38 +0000 (+0100) Subject: IBM Z: zTPF: Add tpf trace customization options X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=181e2a2fa5e6d444a0aee95add450e5bcc659ca9;p=gcc.git IBM Z: zTPF: Add tpf trace customization options The zTPF OS implements a tracing facility for function entry and exit which uses global flags and trace function addresses. The addresses of the flags as well as the trace functions are currently hard-coded in the zTPF specific GCC parts of the IBM Z back-end. With this patch these addresses can be changed at compile-time using the new command line options. For convenience one additional command line option (-mtpf-trace-skip) implements a new set of hard-coded addresses. gcc/ChangeLog: 2020-03-04 Andreas Krebbel * config/s390/s390.c (s390_emit_prologue): Specify the 2 new operands to the prologue_tpf expander. (s390_emit_epilogue): Likewise. (s390_option_override_internal): Do error checking and setup for the new options. * config/s390/tpf.h (TPF_TRACE_PROLOGUE_CHECK) (TPF_TRACE_EPILOGUE_CHECK, TPF_TRACE_PROLOGUE_TARGET) (TPF_TRACE_EPILOGUE_TARGET, TPF_TRACE_PROLOGUE_SKIP_TARGET) (TPF_TRACE_EPILOGUE_SKIP_TARGET): New macro definitions. * config/s390/tpf.md ("prologue_tpf", "epilogue_tpf"): Add two new operands for the check flag and the branch target. * config/s390/tpf.opt ("mtpf-trace-hook-prologue-check") ("mtpf-trace-hook-prologue-target") ("mtpf-trace-hook-epilogue-check") ("mtpf-trace-hook-epilogue-target", "mtpf-trace-skip"): New options. * doc/invoke.texi: Document -mtpf-trace-skip option. The other options are for debugging purposes and will not be documented here. --- diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index ebba6704852..31af842eb35 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -11363,17 +11363,21 @@ s390_emit_prologue (void) emit_insn (insns); } +#if TARGET_TPF != 0 if (TARGET_TPF_PROFILING) { - /* Generate a BAS instruction to serve as a function - entry intercept to facilitate the use of tracing - algorithms located at the branch target. */ - emit_insn (gen_prologue_tpf ()); + /* Generate a BAS instruction to serve as a function entry + intercept to facilitate the use of tracing algorithms located + at the branch target. */ + emit_insn (gen_prologue_tpf ( + GEN_INT (s390_tpf_trace_hook_prologue_check), + GEN_INT (s390_tpf_trace_hook_prologue_target))); - /* Emit a blockage here so that all code - lies between the profiling mechanisms. */ + /* Emit a blockage here so that all code lies between the + profiling mechanisms. */ emit_insn (gen_blockage ()); } +#endif } /* Expand the epilogue into a bunch of separate insns. */ @@ -11386,19 +11390,22 @@ s390_emit_epilogue (bool sibcall) int next_offset; int i; +#if TARGET_TPF != 0 if (TARGET_TPF_PROFILING) { + /* Generate a BAS instruction to serve as a function entry + intercept to facilitate the use of tracing algorithms located + at the branch target. */ - /* Generate a BAS instruction to serve as a function - entry intercept to facilitate the use of tracing - algorithms located at the branch target. */ - - /* Emit a blockage here so that all code - lies between the profiling mechanisms. */ + /* Emit a blockage here so that all code lies between the + profiling mechanisms. */ emit_insn (gen_blockage ()); - emit_insn (gen_epilogue_tpf ()); + emit_insn (gen_epilogue_tpf ( + GEN_INT (s390_tpf_trace_hook_epilogue_check), + GEN_INT (s390_tpf_trace_hook_epilogue_target))); } +#endif /* Check whether to use frame or stack pointer for restore. */ @@ -15266,6 +15273,26 @@ s390_option_override_internal (struct gcc_options *opts, if (!DISP_IN_RANGE ((1 << param_stack_clash_protection_probe_interval))) param_stack_clash_protection_probe_interval = 12; +#if TARGET_TPF != 0 + if (!CONST_OK_FOR_J (opts->x_s390_tpf_trace_hook_prologue_check)) + error ("-mtpf-trace-hook-prologue-check requires integer in range 0..4095"); + + if (!CONST_OK_FOR_J (opts->x_s390_tpf_trace_hook_prologue_target)) + error ("-mtpf-trace-hook-prologue-target requires integer in range 0..4095"); + + if (!CONST_OK_FOR_J (opts->x_s390_tpf_trace_hook_epilogue_check)) + error ("-mtpf-trace-hook-epilogue-check requires integer in range 0..4095"); + + if (!CONST_OK_FOR_J (opts->x_s390_tpf_trace_hook_epilogue_target)) + error ("-mtpf-trace-hook-epilogue-target requires integer in range 0..4095"); + + if (s390_tpf_trace_skip) + { + opts->x_s390_tpf_trace_hook_prologue_target = TPF_TRACE_PROLOGUE_SKIP_TARGET; + opts->x_s390_tpf_trace_hook_epilogue_target = TPF_TRACE_EPILOGUE_SKIP_TARGET; + } +#endif + #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 if (!TARGET_LONG_DOUBLE_128_P (opts_set->x_target_flags)) opts->x_target_flags |= MASK_LONG_DOUBLE_128; diff --git a/gcc/config/s390/tpf.h b/gcc/config/s390/tpf.h index d83b1ae4785..22adf27c30b 100644 --- a/gcc/config/s390/tpf.h +++ b/gcc/config/s390/tpf.h @@ -131,4 +131,20 @@ along with GCC; see the file COPYING3. If not see /* GAS supports it, but the debuggers don't, so avoid it. */ #define SUPPORTS_DISCRIMINATOR 0 +/* z/TPF hardcoded values for the -mtpf-trace feature. */ + +/* The *_CHECK value specify addresses in the lowcore whose byte + values can be used to turn on/off the tracing. */ +#define TPF_TRACE_PROLOGUE_CHECK 4065 +#define TPF_TRACE_EPILOGUE_CHECK 4071 + +/* The target addresses for the z/TPF trace facility. */ +#define TPF_TRACE_PROLOGUE_TARGET 4064 +#define TPF_TRACE_EPILOGUE_TARGET 4070 + +/* Alternate target addresses for the z/TPF trace facility. These + will be used with the -mtpf-trace-skip switch. */ +#define TPF_TRACE_PROLOGUE_SKIP_TARGET 4076 +#define TPF_TRACE_EPILOGUE_SKIP_TARGET 4082 + #endif /* ! _TPF_H */ diff --git a/gcc/config/s390/tpf.md b/gcc/config/s390/tpf.md index af814f402e3..19c53a18b8a 100644 --- a/gcc/config/s390/tpf.md +++ b/gcc/config/s390/tpf.md @@ -18,16 +18,20 @@ ;; . (define_insn "prologue_tpf" - [(unspec_volatile [(const_int 0)] UNSPECV_TPF_PROLOGUE) + [(unspec_volatile [(match_operand 0 "const_int_operand" "J") + (match_operand 1 "const_int_operand" "J")] + UNSPECV_TPF_PROLOGUE) (clobber (reg:DI 1))] "TARGET_TPF_PROFILING" - "larl\t%%r1,.+14\;tm\t4065,255\;bnz\t4064" + "larl\t%%r1,.+14\;tm\t%0,255\;bnz\t%1" [(set_attr "length" "14")]) (define_insn "epilogue_tpf" - [(unspec_volatile [(const_int 0)] UNSPECV_TPF_EPILOGUE) + [(unspec_volatile [(match_operand 0 "const_int_operand" "J") + (match_operand 1 "const_int_operand" "J")] + UNSPECV_TPF_EPILOGUE) (clobber (reg:DI 1))] "TARGET_TPF_PROFILING" - "larl\t%%r1,.+14\;tm\t4071,255\;bnz\t4070" + "larl\t%%r1,.+14\;tm\t%0,255\;bnz\t%1" [(set_attr "length" "14")]) diff --git a/gcc/config/s390/tpf.opt b/gcc/config/s390/tpf.opt index 90ab503f75a..9876a55c57f 100644 --- a/gcc/config/s390/tpf.opt +++ b/gcc/config/s390/tpf.opt @@ -22,6 +22,26 @@ mtpf-trace Target Report Mask(TPF_PROFILING) Enable TPF-OS tracing code. +mtpf-trace-hook-prologue-check= +Target RejectNegative Report Joined UInteger Var(s390_tpf_trace_hook_prologue_check) Init(TPF_TRACE_PROLOGUE_CHECK) +Set the trace check address for prologue tpf hook + +mtpf-trace-hook-prologue-target= +Target RejectNegative Report Joined UInteger Var(s390_tpf_trace_hook_prologue_target) Init(TPF_TRACE_PROLOGUE_TARGET) +Set the trace jump address for prologue tpf hook + +mtpf-trace-hook-epilogue-check= +Target RejectNegative Report Joined UInteger Var(s390_tpf_trace_hook_epilogue_check) Init(TPF_TRACE_EPILOGUE_CHECK) +Set the trace check address for epilogue tpf hook + +mtpf-trace-hook-epilogue-target= +Target RejectNegative Report Joined UInteger Var(s390_tpf_trace_hook_epilogue_target) Init(TPF_TRACE_EPILOGUE_TARGET) +Set the trace jump address for epilogue tpf hook + +mtpf-trace-skip +Target Report Var(s390_tpf_trace_skip) Init(0) +Set the prologue and epilogue hook addresses to TPF_TRACE_PROLOGUE_SKIP_TARGET and TPF_TRACE_EPILOGUE_SKIP_TARGET. Equivalent to using -mtpf-trace-hook-prologue-target=TPF_TRACE_PROLOGUE_SKIP_TARGET and -mtpf-trace-hook-epilogue-target=TPF_TRACE_EPILOGUE_SKIP_TARGET + mmain Target Report Specify main object for TPF-OS. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f51729d0e39..af28015234c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -1223,7 +1223,8 @@ See RS/6000 and PowerPC Options. -msmall-exec -mno-small-exec -mmvcle -mno-mvcle @gol -m64 -m31 -mdebug -mno-debug -mesa -mzarch @gol -mhtm -mvx -mzvector @gol --mtpf-trace -mno-tpf-trace -mfused-madd -mno-fused-madd @gol +-mtpf-trace -mno-tpf-trace -mtpf-trace-skip -mno-tpf-trace-skip @gol +-mfused-madd -mno-fused-madd @gol -mwarn-framesize -mwarn-dynamicstack -mstack-size -mstack-guard @gol -mhotpatch=@var{halfwords},@var{halfwords}} @@ -26953,6 +26954,16 @@ Generate code that adds (does not add) in TPF OS specific branches to trace routines in the operating system. This option is off by default, even when compiling for the TPF OS@. +@item -mtpf-trace-skip +@itemx -mno-tpf-trace-skip +@opindex mtpf-trace-skip +@opindex mno-tpf-trace-skip +Generate code that changes (does not change) the default branch +targets enabled by @option{-mtpf-trace} to point to specialized trace +routines providing the ability of selectively skipping function trace +entries for the TPF OS. This option is off by default, even when +compiling for the TPF OS and specifying @option{-mtpf-trace}. + @item -mfused-madd @itemx -mno-fused-madd @opindex mfused-madd