I was asked about Ada support, so I tried cross building a native RISC-V Linux Ada compiler, and it turned out to be possible with a little bit of work. I just started with the MIPS support, and then fixed everything that was obviously wrong: endianness, error numbers, signal numbers, struct_sigaction offsets, etc.
The result is good enough to bootstrap natively and seems to give reasonable native testsuite results for a first attempt. The machine I'm running on has broken icache flushing, so trampolines won't work, and I suspect that is causing a lot of the testsuite failures. Here are the Ada testsuite results I'm getting at the moment. === acats Summary === # of expected passes 2138 # of unexpected failures 182 === gnat Summary === # of expected passes 2757 # of unexpected failures 26 # of expected failures 24 # of unsupported tests 25 Ada is a low priority side project for me, so if you want non-trivial changes it may be a while before I can get to them. There is a lot of other stuff higher on my priority list at the moment, such as getting native gdb support working. If this isn't OK as is, then I'm willing to put work-in-progress patches in a bug report or on a branch or something. OK? Jim gcc/ada/ * Makefile.rtl: Add riscv*-linux* support. * libgnarl/s-linux__riscv.ads: New. * libgnat/system-linux-riscv.ads: New. --- gcc/ada/Makefile.rtl | 28 +++++ gcc/ada/libgnarl/s-linux__riscv.ads | 133 ++++++++++++++++++++++ gcc/ada/libgnat/system-linux-riscv.ads | 147 +++++++++++++++++++++++++ 3 files changed, 308 insertions(+) create mode 100644 gcc/ada/libgnarl/s-linux__riscv.ads create mode 100644 gcc/ada/libgnat/system-linux-riscv.ads diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl index f69170d9fe3..374c60b576e 100644 --- a/gcc/ada/Makefile.rtl +++ b/gcc/ada/Makefile.rtl @@ -2468,6 +2468,34 @@ ifeq ($(strip $(filter-out %x32 linux%,$(target_cpu) $(target_os))),) LIBRARY_VERSION := $(LIB_VERSION) endif +# RISC-V Linux +ifeq ($(strip $(filter-out riscv% linux%,$(target_cpu) $(target_os))),) + LIBGNAT_TARGET_PAIRS = \ + a-intnam.ads<libgnarl/a-intnam__linux.ads \ + s-inmaop.adb<libgnarl/s-inmaop__posix.adb \ + s-intman.adb<libgnarl/s-intman__posix.adb \ + s-linux.ads<libgnarl/s-linux__riscv.ads \ + s-osinte.adb<libgnarl/s-osinte__posix.adb \ + s-osinte.ads<libgnarl/s-osinte__linux.ads \ + s-osprim.adb<libgnat/s-osprim__posix.adb \ + s-taprop.adb<libgnarl/s-taprop__linux.adb \ + s-tasinf.ads<libgnarl/s-tasinf__linux.ads \ + s-tasinf.adb<libgnarl/s-tasinf__linux.adb \ + s-taspri.ads<libgnarl/s-taspri__posix-noaltstack.ads \ + s-tpopsp.adb<libgnarl/s-tpopsp__posix-foreign.adb \ + g-sercom.adb<libgnat/g-sercom__linux.adb \ + system.ads<libgnat/system-linux-riscv.ads + + TOOLS_TARGET_PAIRS = indepsw.adb<indepsw-gnu.adb + + EXTRA_GNATRTL_TASKING_OBJS=s-linux.o + EH_MECHANISM=-gcc + THREADSLIB = -lpthread + GNATLIB_SHARED = gnatlib-shared-dual + GMEM_LIB = gmemlib + LIBRARY_VERSION := $(LIB_VERSION) +endif + # Darwin (Mac OS X) ifeq ($(strip $(filter-out darwin%,$(target_os))),) SO_OPTS = -shared-libgcc diff --git a/gcc/ada/libgnarl/s-linux__riscv.ads b/gcc/ada/libgnarl/s-linux__riscv.ads new file mode 100644 index 00000000000..74420f39f1b --- /dev/null +++ b/gcc/ada/libgnarl/s-linux__riscv.ads @@ -0,0 +1,133 @@ +------------------------------------------------------------------------------ +-- -- +-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . L I N U X -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2009-2018, Free Software Foundation, Inc. -- +-- -- +-- GNARL is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the RISC-V version of this package + +-- This package encapsulates cpu specific differences between implementations +-- of GNU/Linux, in order to share s-osinte-linux.ads. + +-- PLEASE DO NOT add any with-clauses to this package or remove the pragma +-- Preelaborate. This package is designed to be a bottom-level (leaf) package + +with Interfaces.C; + +package System.Linux is + pragma Preelaborate; + + ---------- + -- Time -- + ---------- + + subtype int is Interfaces.C.int; + subtype long is Interfaces.C.long; + subtype suseconds_t is Interfaces.C.long; + subtype time_t is Interfaces.C.long; + subtype clockid_t is Interfaces.C.int; + + type timespec is record + tv_sec : time_t; + tv_nsec : long; + end record; + pragma Convention (C, timespec); + + type timeval is record + tv_sec : time_t; + tv_usec : suseconds_t; + end record; + pragma Convention (C, timeval); + + ----------- + -- Errno -- + ----------- + + EAGAIN : constant := 11; + EINTR : constant := 4; + EINVAL : constant := 22; + ENOMEM : constant := 12; + EPERM : constant := 1; + ETIMEDOUT : constant := 110; + + ------------- + -- Signals -- + ------------- + + SIGHUP : constant := 1; -- hangup + SIGINT : constant := 2; -- interrupt (rubout) + SIGQUIT : constant := 3; -- quit (ASCD FS) + SIGILL : constant := 4; -- illegal instruction (not reset) + SIGTRAP : constant := 5; -- trace trap (not reset) + SIGIOT : constant := 6; -- IOT instruction + SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future + SIGBUS : constant := 7; -- bus error + SIGFPE : constant := 8; -- floating point exception + SIGKILL : constant := 9; -- kill (cannot be caught or ignored) + SIGUSR1 : constant := 10; -- user defined signal 1 + SIGSEGV : constant := 11; -- segmentation violation + SIGUSR2 : constant := 12; -- user defined signal 2 + SIGPIPE : constant := 13; -- write on a pipe with no one to read it + SIGALRM : constant := 14; -- alarm clock + SIGTERM : constant := 15; -- software termination signal from kill + SIGSTKFLT : constant := 16; -- coprocessor stack fault (Linux) + SIGCLD : constant := 17; -- alias for SIGCHLD + SIGCHLD : constant := 17; -- child status change + SIGCONT : constant := 18; -- stopped process has been continued + SIGSTOP : constant := 19; -- stop (cannot be caught or ignored) + SIGTSTP : constant := 20; -- user stop requested from tty + SIGTTIN : constant := 21; -- background tty read attempted + SIGTTOU : constant := 22; -- background tty write attempted + SIGURG : constant := 23; -- urgent condition on IO channel + SIGXCPU : constant := 24; -- CPU time limit exceeded + SIGXFSZ : constant := 25; -- filesize limit exceeded + SIGVTALRM : constant := 26; -- virtual timer expired + SIGPROF : constant := 28; -- profiling timer expired + SIGWINCH : constant := 28; -- window size change + SIGPOLL : constant := 29; -- pollable event occurred + SIGIO : constant := 29; -- I/O now possible (4.2 BSD) + SIGPWR : constant := 30; -- power-fail restart + SIGSYS : constant := 31; -- bad system call + + SIGLTHRRES : constant := 0; -- GNU/LinuxThreads restart signal + SIGLTHRCAN : constant := 0; -- GNU/LinuxThreads cancel signal + SIGLTHRDBG : constant := 0; -- GNU/LinuxThreads debugger signal + + -- These don't exist for Linux/RISC-V. The constants are present + -- so that we can continue to use a-intnam-linux.ads. + SIGLOST : constant := 0; -- File lock lost + SIGUNUSED : constant := 0; -- unused signal (GNU/Linux) + SIGEMT : constant := 0; -- EMT + + -- struct_sigaction offsets + + sa_handler_pos : constant := 0; + sa_mask_pos : constant := long'Size / 8; + sa_flags_pos : constant := long'Size / 8 + 128; + + SA_SIGINFO : constant := 16#04#; + SA_ONSTACK : constant := 16#08000000#; + +end System.Linux; diff --git a/gcc/ada/libgnat/system-linux-riscv.ads b/gcc/ada/libgnat/system-linux-riscv.ads new file mode 100644 index 00000000000..8e43b401450 --- /dev/null +++ b/gcc/ada/libgnat/system-linux-riscv.ads @@ -0,0 +1,147 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M -- +-- -- +-- S p e c -- +-- (GNU-Linux/RISC-V Version) -- +-- -- +-- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- +-- -- +-- This specification is derived from the Ada Reference Manual for use with -- +-- GNAT. The copyright notice above, and the license provisions that follow -- +-- apply solely to the contents of the part following the private keyword. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +package System is + pragma Pure; + -- Note that we take advantage of the implementation permission to make + -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada + -- 2005, this is Pure in any case (AI-362). + + pragma No_Elaboration_Code_All; + -- Allow the use of that restriction in units that WITH this unit + + type Name is (SYSTEM_NAME_GNAT); + System_Name : constant Name := SYSTEM_NAME_GNAT; + + -- System-Dependent Named Numbers + + Min_Int : constant := Long_Long_Integer'First; + Max_Int : constant := Long_Long_Integer'Last; + + Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size; + Max_Nonbinary_Modulus : constant := Integer'Last; + + Max_Base_Digits : constant := Long_Long_Float'Digits; + Max_Digits : constant := Long_Long_Float'Digits; + + Max_Mantissa : constant := 63; + Fine_Delta : constant := 2.0 ** (-Max_Mantissa); + + Tick : constant := 0.000_001; + + -- Storage-related Declarations + + type Address is private; + pragma Preelaborable_Initialization (Address); + Null_Address : constant Address; + + Storage_Unit : constant := 8; + Word_Size : constant := Standard'Word_Size; + Memory_Size : constant := 2 ** Word_Size; + + -- Address comparison + + function "<" (Left, Right : Address) return Boolean; + function "<=" (Left, Right : Address) return Boolean; + function ">" (Left, Right : Address) return Boolean; + function ">=" (Left, Right : Address) return Boolean; + function "=" (Left, Right : Address) return Boolean; + + pragma Import (Intrinsic, "<"); + pragma Import (Intrinsic, "<="); + pragma Import (Intrinsic, ">"); + pragma Import (Intrinsic, ">="); + pragma Import (Intrinsic, "="); + + -- Other System-Dependent Declarations + + type Bit_Order is (High_Order_First, Low_Order_First); + Default_Bit_Order : constant Bit_Order := Low_Order_First; + pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning + + -- Priority-related Declarations (RM D.1) + + Max_Priority : constant Positive := 30; + Max_Interrupt_Priority : constant Positive := 31; + + subtype Any_Priority is Integer range 0 .. 31; + subtype Priority is Any_Priority range 0 .. 30; + subtype Interrupt_Priority is Any_Priority range 31 .. 31; + + Default_Priority : constant Priority := 15; + +private + + type Address is mod Memory_Size; + Null_Address : constant Address := 0; + + -------------------------------------- + -- System Implementation Parameters -- + -------------------------------------- + + -- These parameters provide information about the target that is used + -- by the compiler. They are in the private part of System, where they + -- can be accessed using the special circuitry in the Targparm unit + -- whose source should be consulted for more detailed descriptions + -- of the individual switch values. + + Backend_Divide_Checks : constant Boolean := False; + Backend_Overflow_Checks : constant Boolean := True; + Command_Line_Args : constant Boolean := True; + Configurable_Run_Time : constant Boolean := False; + Denorm : constant Boolean := True; + Duration_32_Bits : constant Boolean := False; + Exit_Status_Supported : constant Boolean := True; + Fractional_Fixed_Ops : constant Boolean := False; + Frontend_Layout : constant Boolean := False; + Machine_Overflows : constant Boolean := False; + Machine_Rounds : constant Boolean := True; + Preallocated_Stacks : constant Boolean := False; + Signed_Zeros : constant Boolean := True; + Stack_Check_Default : constant Boolean := False; + Stack_Check_Probes : constant Boolean := True; + Stack_Check_Limits : constant Boolean := False; + Support_Aggregates : constant Boolean := True; + Support_Composite_Assign : constant Boolean := True; + Support_Composite_Compare : constant Boolean := True; + Support_Long_Shifts : constant Boolean := True; + Always_Compatible_Rep : constant Boolean := False; + Suppress_Standard_Library : constant Boolean := False; + Use_Ada_Main_Program_Name : constant Boolean := False; + Frontend_Exceptions : constant Boolean := False; + ZCX_By_Default : constant Boolean := True; + +end System; -- 2.17.1