https://gcc.gnu.org/g:0bebf55d4efcb8b045850d0224d71daa0807b1f9
commit r15-4905-g0bebf55d4efcb8b045850d0224d71daa0807b1f9
Author: Daniel King <dmk...@adacore.com>
Date: Fri Sep 13 16:15:32 2024 +0100
ada: Build and runtime support for CheriBSD
SIGPROT is a new signal on CheriBSD that signals a CHERI protection
violation.
The full runtime converts these to the appropriate Ada exception declared in
Interfaces.CHERI.Exceptions.
gcc/ada/ChangeLog:
* Makefile.rtl: Build support for Morello CheriBSD.
* libgnarl/s-intman__cheribsd.adb: New file for CheriBSD.
* libgnarl/s-osinte__cheribsd.ads: New file for CheriBSD.
Diff:
---
gcc/ada/Makefile.rtl | 18 +-
gcc/ada/libgnarl/s-intman__cheribsd.adb | 332 ++++++++++++++++
gcc/ada/libgnarl/s-osinte__cheribsd.ads | 683 ++++++++++++++++++++++++++++++++
3 files changed, 1030 insertions(+), 3 deletions(-)
diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
index 8656e71250bb..904ec34026fc 100644
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -1789,10 +1789,8 @@ ifeq ($(strip $(filter-out %aarch64
freebsd%,$(target_cpu) $(target_os))),)
a-nallfl.ads<libgnat/a-nallfl__wraplf.ads \
s-dorepr.adb<libgnat/s-dorepr__fma.adb \
s-inmaop.adb<libgnarl/s-inmaop__posix.adb \
- s-intman.adb<libgnarl/s-intman__posix.adb \
s-mudido.adb<libgnarl/s-mudido__affinity.adb \
s-osinte.adb<libgnarl/s-osinte__freebsd.adb \
- s-osinte.ads<libgnarl/s-osinte__freebsd.ads \
s-oslock.ads<libgnat/s-oslock__posix.ads \
s-osprim.adb<libgnat/s-osprim__posix.adb \
s-taprop.adb<libgnarl/s-taprop__posix.adb \
@@ -1803,7 +1801,20 @@ ifeq ($(strip $(filter-out %aarch64
freebsd%,$(target_cpu) $(target_os))),)
$(GNATRTL_128BIT_PAIRS) \
system.ads<libgnat/system-freebsd.ads
- EXTRA_GNATRTL_NONTASKING_OBJS = $(GNATRTL_128BIT_OBJS)
+ # Morello CheriBSD
+ ifneq (,$(findstring morello,$(target_alias)))
+ LIBGNAT_TARGET_PAIRS += \
+ s-intman.adb<libgnarl/s-intman__cheribsd.adb \
+ s-osinte.ads<libgnarl/s-osinte__cheribsd.ads
+
+ EXTRA_GNATRTL_NONTASKING_OBJS += i-cheri.o i-cheri-exceptions.o
+ else
+ LIBGNAT_TARGET_PAIRS += \
+ s-intman.adb<libgnarl/s-intman__posix.adb \
+ s-osinte.ads<libgnarl/s-osinte__freebsd.ads
+ endif
+
+ EXTRA_GNATRTL_NONTASKING_OBJS += $(GNATRTL_128BIT_OBJS)
GNATLIB_SHARED = gnatlib-shared-dual
@@ -3132,6 +3143,7 @@ ADA_EXCLUDE_SRCS =\
g-allein.ads g-alleve.adb g-alleve.ads g-altcon.adb g-altcon.ads \
g-altive.ads g-alveop.adb g-alveop.ads g-alvety.ads g-alvevi.ads \
g-intpri.ads g-regist.adb g-regist.ads g-sse.ads g-ssvety.ads \
+ i-cheri.ads i-cheri.adb i-cheri-exceptions.ads \
i-vxwoio.adb i-vxwoio.ads i-vxwork.ads \
s-linux.ads s-vxwext.adb s-vxwext.ads s-win32.ads s-winext.ads \
s-stchop.ads s-stchop.adb \
diff --git a/gcc/ada/libgnarl/s-intman__cheribsd.adb
b/gcc/ada/libgnarl/s-intman__cheribsd.adb
new file mode 100644
index 000000000000..3b5f16d01c58
--- /dev/null
+++ b/gcc/ada/libgnarl/s-intman__cheribsd.adb
@@ -0,0 +1,332 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2024, 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/>. --
+-- --
+-- GNARL was developed by the GNARL team at Florida State University. --
+-- Extensive contributions were provided by Ada Core Technologies, Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the POSIX threads version of this package, adapted for CheriBSD
+
+-- Make a careful study of all signals available under the OS, to see which
+-- need to be reserved, kept always unmasked, or kept always unmasked. Be on
+-- the lookout for special signals that may be used by the thread library.
+
+-- Since this is a multi target file, the signal <-> exception mapping
+-- is simple minded. If you need a more precise and target specific
+-- signal handling, create a new s-intman.adb that will fit your needs.
+
+-- This file assumes that:
+
+-- SIGFPE, SIGILL, SIGSEGV and SIGBUS exist. They are mapped as follows:
+-- SIGPFE => Constraint_Error
+-- SIGILL => Program_Error
+-- SIGSEGV => Storage_Error
+-- SIGBUS => Storage_Error
+
+-- SIGINT exists and will be kept unmasked unless the pragma
+-- Unreserve_All_Interrupts is specified anywhere in the application.
+
+-- System.OS_Interface contains the following:
+-- SIGADAABORT: the signal that will be used to abort tasks.
+-- Unmasked: the OS specific set of signals that should be unmasked in
+-- all the threads. SIGADAABORT is unmasked by
+-- default
+-- Reserved: the OS specific set of signals that are reserved.
+
+with Interfaces.CHERI.Exceptions;
+with System.Task_Primitives;
+
+package body System.Interrupt_Management is
+
+ use Interfaces.C;
+ use Interfaces.CHERI.Exceptions;
+ use System.OS_Interface;
+
+ type Interrupt_List is array (Interrupt_ID range <>) of Interrupt_ID;
+ Exception_Interrupts : constant Interrupt_List :=
+ [SIGFPE, SIGILL, SIGSEGV, SIGBUS];
+
+ Unreserve_All_Interrupts : constant Interfaces.C.int;
+ pragma Import
+ (C, Unreserve_All_Interrupts, "__gl_unreserve_all_interrupts");
+
+ -----------------------
+ -- Local Subprograms --
+ -----------------------
+
+ function State (Int : Interrupt_ID) return Character;
+ pragma Import (C, State, "__gnat_get_interrupt_state");
+ -- Get interrupt state. Defined in init.c The input argument is the
+ -- interrupt number, and the result is one of the following:
+
+ User : constant Character := 'u';
+ Runtime : constant Character := 'r';
+ Default : constant Character := 's';
+ -- 'n' this interrupt not set by any Interrupt_State pragma
+ -- 'u' Interrupt_State pragma set state to User
+ -- 'r' Interrupt_State pragma set state to Runtime
+ -- 's' Interrupt_State pragma set state to System (use "default"
+ -- system handler)
+
+ procedure Notify_Exception
+ (signo : Signal;
+ siginfo : access siginfo_t;
+ ucontext : System.Address);
+ -- This function identifies the Ada exception to be raised using the
+ -- information when the system received a synchronous signal. Since this
+ -- function is machine and OS dependent, different code has to be provided
+ -- for different target.
+
+ ----------------------
+ -- Notify_Exception --
+ ----------------------
+
+ Signal_Mask : aliased sigset_t;
+ -- The set of signals handled by Notify_Exception
+
+ procedure Notify_Exception
+ (signo : Signal;
+ siginfo : access siginfo_t;
+ ucontext : System.Address)
+ is
+ Result : Interfaces.C.int;
+
+ begin
+ -- With the __builtin_longjmp, the signal mask is not restored, so we
+ -- need to restore it explicitly.
+
+ Result := pthread_sigmask (SIG_UNBLOCK, Signal_Mask'Access, null);
+ pragma Assert (Result = 0);
+
+ -- Perform the necessary context adjustments prior to a raise
+ -- from a signal handler.
+
+ Adjust_Context_For_Raise (signo, ucontext);
+
+ -- Check that treatment of exception propagation here is consistent with
+ -- treatment of the abort signal in System.Task_Primitives.Operations.
+
+ case signo is
+ when SIGFPE => raise Constraint_Error;
+ when SIGILL => raise Program_Error;
+ when SIGSEGV => raise Storage_Error;
+ when SIGBUS => raise Storage_Error;
+ when SIGPROT =>
+ case siginfo.all.si_code is
+ when PROT_CHERI_TAG => raise Capability_Tag_Error;
+ when PROT_CHERI_SEALED => raise Capability_Sealed_Error;
+ when PROT_CHERI_UNALIGNED_BASE => raise Storage_Error;
+
+ when PROT_CHERI_BOUNDS
+ | PROT_CHERI_IMPRECISE =>
+ raise Capability_Bound_Error;
+
+ when PROT_CHERI_TYPE
+ | PROT_CHERI_PERM
+ | PROT_CHERI_STORELOCAL
+ | PROT_CHERI_CINVOKE
+ | PROT_CHERI_SYSREG =>
+ raise Capability_Permission_Error;
+
+ when others =>
+ raise Storage_Error;
+ end case;
+
+ when others =>
+ null;
+ end case;
+ end Notify_Exception;
+
+ ----------------
+ -- Initialize --
+ ----------------
+
+ Initialized : Boolean := False;
+
+ procedure Initialize is
+ act : aliased struct_sigaction;
+ old_act : aliased struct_sigaction;
+ Result : System.OS_Interface.int;
+
+ Use_Alternate_Stack : constant Boolean :=
+ System.Task_Primitives.Alternate_Stack_Size /= 0;
+ -- Whether to use an alternate signal stack for stack overflows
+
+ Sigsetable_Signal_Mask : aliased sigset_t;
+
+ Interrupts_Default_To_System : Integer;
+ pragma Import (C, Interrupts_Default_To_System,
+ "__gl_interrupts_default_to_system");
+
+ begin
+ if Initialized then
+ return;
+ end if;
+
+ Initialized := True;
+
+ -- Need to call pthread_init very early because it is doing signal
+ -- initializations.
+
+ pthread_init;
+
+ Abort_Task_Interrupt := SIGADAABORT;
+
+ act.sa_handler := Notify_Exception'Address;
+
+ -- Setting SA_SIGINFO asks the kernel to pass more than just the signal
+ -- number argument to the handler when it is called. The set of extra
+ -- parameters includes a pointer to the interrupted context, which the
+ -- ZCX propagation scheme needs.
+
+ -- Most man pages for sigaction mention that sa_sigaction should be set
+ -- instead of sa_handler when SA_SIGINFO is on. In practice, the two
+ -- fields are actually union'ed and located at the same offset.
+
+ -- On some targets, we set sa_flags to SA_NODEFER so that during the
+ -- handler execution we do not change the Signal_Mask to be masked for
+ -- the Signal.
+
+ -- This is a temporary fix to the problem that the Signal_Mask is not
+ -- restored after the exception (longjmp) from the handler. The right
+ -- fix should be made in sigsetjmp so that we save the Signal_Set and
+ -- restore it after a longjmp.
+
+ -- Since SA_NODEFER is obsolete, instead we reset explicitly the mask
+ -- in the exception handler.
+
+ Result := sigemptyset (Signal_Mask'Access);
+ pragma Assert (Result = 0);
+
+ -- Add signals that map to Ada exceptions to the mask
+
+ for J in Exception_Interrupts'Range loop
+ if State (Exception_Interrupts (J)) /= Default then
+ Result := sigaddset (Signal_Mask'Access,
+ Signal (Exception_Interrupts (J)));
+ pragma Assert (Result = 0);
+ end if;
+ end loop;
+
+ act.sa_mask := Signal_Mask;
+
+ pragma Assert (Keep_Unmasked = [Interrupt_ID'Range => False]);
+ pragma Assert (Reserve = [Interrupt_ID'Range => False]);
+
+ -- Process state of exception signals
+
+ for J in Exception_Interrupts'Range loop
+ if State (Exception_Interrupts (J)) /= User then
+ Keep_Unmasked (Exception_Interrupts (J)) := True;
+ Reserve (Exception_Interrupts (J)) := True;
+
+ if State (Exception_Interrupts (J)) /= Default then
+ act.sa_flags := SA_SIGINFO;
+
+ if Use_Alternate_Stack
+ and then Exception_Interrupts (J) = SIGSEGV
+ then
+ act.sa_flags := act.sa_flags + SA_ONSTACK;
+ end if;
+
+ Result :=
+ sigaction
+ (Signal (Exception_Interrupts (J)), act'Unchecked_Access,
+ old_act'Unchecked_Access);
+ pragma Assert (Result = 0);
+ end if;
+ end if;
+ end loop;
+
+ if State (Abort_Task_Interrupt) /= User then
+ Keep_Unmasked (Abort_Task_Interrupt) := True;
+ Reserve (Abort_Task_Interrupt) := True;
+ end if;
+
+ -- Set SIGINT to unmasked state as long as it is not in "User" state.
+ -- Check for Unreserve_All_Interrupts last.
+
+ if State (SIGINT) /= User then
+ Keep_Unmasked (SIGINT) := True;
+ Reserve (SIGINT) := True;
+ end if;
+
+ -- Check all signals for state that requires keeping them unmasked and
+ -- reserved.
+
+ -- Unmasking might involve explicit operations later on, typically
+ -- performed on the entire set of relevant signals gathered together
+ -- by way of sigset_t mask. Doing anything of this kind is forbidden
+ -- for very specific signals and would trip assertion checks if
+ -- attempted. Check for this here, preventing the Keep_Unmasked
+ -- request upfront. This is of particular relevance for
+ -- Interrupts_System_By_Default as it would lead to such requests
+ -- for every signal not altered otherwise.
+
+ Result := sigemptyset (Sigsetable_Signal_Mask'Access);
+ pragma Assert (Result = 0);
+
+ for J in Interrupt_ID'Range loop
+ if State (J) = Default or else State (J) = Runtime then
+ if Interrupts_Default_To_System = 0 or else
+ sigaddset (Sigsetable_Signal_Mask'Access, Signal (J)) = 0
+ then
+ Keep_Unmasked (J) := True;
+ end if;
+ Reserve (J) := True;
+ end if;
+ end loop;
+
+ -- Add the set of signals that must always be unmasked for this target
+
+ for J in Unmasked'Range loop
+ Keep_Unmasked (Interrupt_ID (Unmasked (J))) := True;
+ Reserve (Interrupt_ID (Unmasked (J))) := True;
+ end loop;
+
+ -- Add target-specific reserved signals
+
+ for J in Reserved'Range loop
+ Reserve (Interrupt_ID (Reserved (J))) := True;
+ end loop;
+
+ -- Process pragma Unreserve_All_Interrupts. This overrides any settings
+ -- due to pragma Interrupt_State:
+
+ if Unreserve_All_Interrupts /= 0 then
+ Keep_Unmasked (SIGINT) := False;
+ Reserve (SIGINT) := False;
+ end if;
+
+ -- We do not really have Signal 0. We just use this value to identify
+ -- non-existent signals (see s-intnam.ads). Therefore, Signal should not
+ -- be used in all signal related operations hence mark it as reserved.
+
+ Reserve (0) := True;
+ end Initialize;
+
+end System.Interrupt_Management;
diff --git a/gcc/ada/libgnarl/s-osinte__cheribsd.ads
b/gcc/ada/libgnarl/s-osinte__cheribsd.ads
new file mode 100644
index 000000000000..fd3c603d8b48
--- /dev/null
+++ b/gcc/ada/libgnarl/s-osinte__cheribsd.ads
@@ -0,0 +1,683 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . O S _ I N T E R F A C E --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1991-2017, Florida State University --
+-- Copyright (C) 1995-2024, Free Software Foundation, Inc. --
+-- --
+-- 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/>. --
+-- --
+-- GNARL was developed by the GNARL team at Florida State University. It is --
+-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
+-- State University (http://www.gnat.com). --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the CheriBSD (POSIX Threads) version of this package
+
+-- This package encapsulates all direct interfaces to OS services
+-- that are needed by the tasking run-time (libgnarl).
+
+-- 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 Ada.Unchecked_Conversion;
+
+with Interfaces;
+with Interfaces.C;
+
+with System.OS_Locks;
+with System.Parameters;
+
+package System.OS_Interface is
+ pragma Preelaborate;
+
+ pragma Linker_Options ("-pthread");
+
+ subtype int is Interfaces.C.int;
+ subtype short is Interfaces.C.short;
+ subtype long is Interfaces.C.long;
+ subtype unsigned is Interfaces.C.unsigned;
+ subtype unsigned_short is Interfaces.C.unsigned_short;
+ subtype unsigned_long is Interfaces.C.unsigned_long;
+ subtype unsigned_char is Interfaces.C.unsigned_char;
+ subtype plain_char is Interfaces.C.plain_char;
+ subtype size_t is Interfaces.C.size_t;
+
+ type int32_t is new int;
+ type uint32_t is new unsigned;
+ type uint64_t is new unsigned_long;
+ type pid_t is new int32_t;
+ type uid_t is new uint32_t;
+
+ -----------
+ -- Errno --
+ -----------
+
+ function Errno return int;
+ pragma Inline (Errno);
+
+ EAGAIN : constant := 35;
+ EINTR : constant := 4;
+ EINVAL : constant := 22;
+ ENOMEM : constant := 12;
+ ETIMEDOUT : constant := 60;
+
+ -------------
+ -- Signals --
+ -------------
+
+ Max_Interrupt : constant := 34;
+ type Signal is new int range 0 .. Max_Interrupt;
+ for Signal'Size use int'Size;
+
+ 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
+ SIGEMT : constant := 7; -- EMT instruction
+ SIGFPE : constant := 8; -- floating point exception
+ SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
+ SIGBUS : constant := 10; -- bus error
+ SIGSEGV : constant := 11; -- segmentation violation
+ SIGSYS : constant := 12; -- bad argument to system call
+ 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
+ SIGURG : constant := 16; -- urgent condition on IO channel
+ SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
+ SIGTSTP : constant := 18; -- user stop requested from tty
+ SIGCONT : constant := 19; -- stopped process has been continued
+ SIGCLD : constant := 20; -- alias for SIGCHLD
+ SIGCHLD : constant := 20; -- child status change
+ SIGTTIN : constant := 21; -- background tty read attempted
+ SIGTTOU : constant := 22; -- background tty write attempted
+ SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
+ SIGXCPU : constant := 24; -- CPU time limit exceeded
+ SIGXFSZ : constant := 25; -- filesize limit exceeded
+ SIGVTALRM : constant := 26; -- virtual timer expired
+ SIGPROF : constant := 27; -- profiling timer expired
+ SIGWINCH : constant := 28; -- window size change
+ SIGINFO : constant := 29; -- information request (NetBSD/FreeBSD)
+ SIGUSR1 : constant := 30; -- user defined signal 1
+ SIGUSR2 : constant := 31; -- user defined signal 2
+ SIGPROT : constant := 34; -- in-address space security (CHERI) exception
+
+ SIGADAABORT : constant := SIGABRT;
+ -- Change this if you want to use another signal for task abort.
+ -- SIGTERM might be a good one.
+
+ type Signal_Set is array (Natural range <>) of Signal;
+
+ -- Interrupts that must be unmasked at all times. FreeBSD
+ -- pthreads will not allow an application to mask out any
+ -- interrupt needed by the threads library.
+ Unmasked : constant Signal_Set :=
+ (SIGTRAP, SIGBUS, SIGTTIN, SIGTTOU, SIGTSTP);
+
+ -- FreeBSD will uses SIGPROF for timing. Do not allow a
+ -- handler to attach to this signal.
+ Reserved : constant Signal_Set := (0 .. 0 => SIGPROF);
+
+ type sigset_t is private;
+
+ function sigaddset
+ (set : access sigset_t;
+ sig : Signal) return int;
+ pragma Import (C, sigaddset, "sigaddset");
+
+ function sigdelset
+ (set : access sigset_t;
+ sig : Signal) return int;
+ pragma Import (C, sigdelset, "sigdelset");
+
+ function sigfillset (set : access sigset_t) return int;
+ pragma Import (C, sigfillset, "sigfillset");
+
+ function sigismember
+ (set : access sigset_t;
+ sig : Signal) return int;
+ pragma Import (C, sigismember, "sigismember");
+
+ function sigemptyset (set : access sigset_t) return int;
+ pragma Import (C, sigemptyset, "sigemptyset");
+
+ type siginfo_reason is array (Integer range 1 .. 8) of int;
+ type siginfo_t is record
+ si_signo : int;
+ si_errno : int;
+ si_code : int;
+ si_pid : pid_t;
+ si_uid : uid_t;
+ si_status : int;
+ si_addr : Address;
+ sival_int : int;
+ reason : siginfo_reason;
+ end record;
+ pragma Convention (C, siginfo_t);
+
+ -- Codes for SIGPROT
+ PROT_CHERI_BOUNDS : constant int := 1;
+ PROT_CHERI_TAG : constant int := 2;
+ PROT_CHERI_SEALED : constant int := 3;
+ PROT_CHERI_TYPE : constant int := 4;
+ PROT_CHERI_PERM : constant int := 5;
+ PROT_CHERI_IMPRECISE : constant int := 7;
+ PROT_CHERI_STORELOCAL : constant int := 8;
+ PROT_CHERI_CINVOKE : constant int := 9;
+ PROT_CHERI_SYSREG : constant int := 11;
+ PROT_CHERI_UNALIGNED_BASE : constant int := 12;
+
+ -- sigcontext is architecture dependent, so define it private
+ type struct_sigcontext is private;
+
+ type old_struct_sigaction is record
+ sa_handler : System.Address;
+ sa_mask : sigset_t;
+ sa_flags : int;
+ end record;
+ pragma Convention (C, old_struct_sigaction);
+
+ type new_struct_sigaction is record
+ sa_handler : System.Address;
+ sa_flags : int;
+ sa_mask : sigset_t;
+ end record;
+ pragma Convention (C, new_struct_sigaction);
+
+ subtype struct_sigaction is new_struct_sigaction;
+ type struct_sigaction_ptr is access all struct_sigaction;
+
+ SIG_BLOCK : constant := 1;
+ SIG_UNBLOCK : constant := 2;
+ SIG_SETMASK : constant := 3;
+
+ SIG_DFL : constant := 0;
+ SIG_IGN : constant := 1;
+
+ SA_SIGINFO : constant := 16#0040#;
+ SA_ONSTACK : constant := 16#0001#;
+
+ function sigaction
+ (sig : Signal;
+ act : struct_sigaction_ptr;
+ oact : struct_sigaction_ptr) return int;
+ pragma Import (C, sigaction, "sigaction");
+
+ ----------
+ -- Time --
+ ----------
+
+ Time_Slice_Supported : constant Boolean := True;
+ -- Indicates whether time slicing is supported (i.e SCHED_RR is supported)
+
+ type timespec is private;
+
+ function nanosleep (rqtp, rmtp : access timespec) return int;
+ pragma Import (C, nanosleep, "nanosleep");
+
+ type clockid_t is new int;
+
+ function clock_getres
+ (clock_id : clockid_t;
+ res : access timespec) return int;
+ pragma Import (C, clock_getres, "clock_getres");
+
+ function clock_gettime
+ (clock_id : clockid_t;
+ tp : access timespec)
+ return int;
+ pragma Import (C, clock_gettime, "clock_gettime");
+
+ function To_Duration (TS : timespec) return Duration;
+ pragma Inline (To_Duration);
+
+ function To_Timespec (D : Duration) return timespec;
+ pragma Inline (To_Timespec);
+
+ type struct_timezone is record
+ tz_minuteswest : int;
+ tz_dsttime : int;
+ end record;
+ pragma Convention (C, struct_timezone);
+
+ procedure usleep (useconds : unsigned_long);
+ pragma Import (C, usleep, "usleep");
+
+ -------------------------
+ -- Priority Scheduling --
+ -------------------------
+
+ SCHED_FIFO : constant := 1;
+ SCHED_OTHER : constant := 2;
+ SCHED_RR : constant := 3;
+
+ function To_Target_Priority
+ (Prio : System.Any_Priority) return Interfaces.C.int;
+ -- Maps System.Any_Priority to a POSIX priority
+
+ -------------
+ -- Process --
+ -------------
+
+ Self_PID : constant pid_t;
+
+ function kill (pid : pid_t; sig : Signal) return int;
+ pragma Import (C, kill, "kill");
+
+ function getpid return pid_t;
+ pragma Import (C, getpid, "getpid");
+
+ ---------
+ -- LWP --
+ ---------
+
+ function lwp_self return System.Address;
+ -- lwp_self does not exist on this thread library, revert to pthread_self
+ -- which is the closest approximation (with getpid). This function is
+ -- needed to share 7staprop.adb across POSIX-like targets.
+ pragma Import (C, lwp_self, "pthread_self");
+
+ -------------
+ -- Threads --
+ -------------
+
+ type Thread_Body is access
+ function (arg : System.Address) return System.Address;
+ pragma Convention (C, Thread_Body);
+
+ function Thread_Body_Access is new
+ Ada.Unchecked_Conversion (System.Address, Thread_Body);
+
+ type pthread_t is private;
+ subtype Thread_Id is pthread_t;
+
+ subtype pthread_mutex_t is System.OS_Locks.pthread_mutex_t;
+ type pthread_cond_t is limited private;
+ type pthread_attr_t is limited private;
+ type pthread_mutexattr_t is limited private;
+ type pthread_condattr_t is limited private;
+ type pthread_key_t is private;
+
+ PTHREAD_CREATE_DETACHED : constant := 1;
+ PTHREAD_CREATE_JOINABLE : constant := 0;
+
+ PTHREAD_SCOPE_PROCESS : constant := 0;
+ PTHREAD_SCOPE_SYSTEM : constant := 2;
+
+ -- Read/Write lock not supported on freebsd. To add support both types
+ -- pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
+ -- with the associated routines pthread_rwlock_[init/destroy] and
+ -- pthread_rwlock_[rdlock/wrlock/unlock].
+
+ subtype pthread_rwlock_t is pthread_mutex_t;
+ subtype pthread_rwlockattr_t is pthread_mutexattr_t;
+
+ -----------
+ -- Stack --
+ -----------
+
+ type stack_t is record
+ ss_sp : System.Address;
+ ss_size : size_t;
+ ss_flags : int;
+ end record;
+ pragma Convention (C, stack_t);
+
+ function sigaltstack
+ (ss : not null access stack_t;
+ oss : access stack_t) return int;
+ pragma Import (C, sigaltstack, "sigaltstack");
+
+ Alternate_Stack : aliased System.Address;
+ -- This is a dummy definition, never used (Alternate_Stack_Size is null)
+
+ Alternate_Stack_Size : constant := 0;
+ -- No alternate signal stack is used on this platform
+
+ Stack_Base_Available : constant Boolean := False;
+ -- Indicates whether the stack base is available on this target
+
+ function Get_Stack_Base (thread : pthread_t) return Address;
+ pragma Inline (Get_Stack_Base);
+ -- returns the stack base of the specified thread. Only call this function
+ -- when Stack_Base_Available is True.
+
+ function Get_Page_Size return int;
+ pragma Import (C, Get_Page_Size, "getpagesize");
+ -- Returns the size of a page
+
+ PROT_NONE : constant := 0;
+ PROT_READ : constant := 1;
+ PROT_WRITE : constant := 2;
+ PROT_EXEC : constant := 4;
+ PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
+ PROT_ON : constant := PROT_NONE;
+ PROT_OFF : constant := PROT_ALL;
+
+ function mprotect (addr : Address; len : size_t; prot : int) return int;
+ pragma Import (C, mprotect);
+
+ ---------------------------------------
+ -- Nonstandard Thread Initialization --
+ ---------------------------------------
+
+ -- FSU_THREADS requires pthread_init, which is nonstandard and this should
+ -- be invoked during the elaboration of s-taprop.adb.
+
+ -- FreeBSD does not require this so we provide an empty Ada body
+
+ procedure pthread_init;
+
+ -------------------------
+ -- POSIX.1c Section 3 --
+ -------------------------
+
+ function sigwait
+ (set : access sigset_t;
+ sig : access Signal) return int;
+ pragma Import (C, sigwait, "sigwait");
+
+ function pthread_kill
+ (thread : pthread_t;
+ sig : Signal) return int;
+ pragma Import (C, pthread_kill, "pthread_kill");
+
+ function pthread_sigmask
+ (how : int;
+ set : access sigset_t;
+ oset : access sigset_t) return int;
+ pragma Import (C, pthread_sigmask, "pthread_sigmask");
+
+ --------------------------
+ -- POSIX.1c Section 11 --
+ --------------------------
+
+ function pthread_mutexattr_init
+ (attr : access pthread_mutexattr_t) return int;
+ pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
+
+ function pthread_mutexattr_destroy
+ (attr : access pthread_mutexattr_t) return int;
+ pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
+
+ function pthread_mutex_init
+ (mutex : access pthread_mutex_t;
+ attr : access pthread_mutexattr_t) return int;
+ pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
+
+ function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
+ pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
+
+ function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
+ pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
+
+ function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
+ pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
+
+ function pthread_condattr_init
+ (attr : access pthread_condattr_t) return int;
+ pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
+
+ function pthread_condattr_destroy
+ (attr : access pthread_condattr_t) return int;
+ pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
+
+ function pthread_cond_init
+ (cond : access pthread_cond_t;
+ attr : access pthread_condattr_t) return int;
+ pragma Import (C, pthread_cond_init, "pthread_cond_init");
+
+ function pthread_cond_destroy (cond : access pthread_cond_t) return int;
+ pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
+
+ function pthread_cond_signal (cond : access pthread_cond_t) return int;
+ pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
+
+ function pthread_cond_wait
+ (cond : access pthread_cond_t;
+ mutex : access pthread_mutex_t) return int;
+ pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
+
+ function pthread_cond_timedwait
+ (cond : access pthread_cond_t;
+ mutex : access pthread_mutex_t;
+ abstime : access timespec) return int;
+ pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
+
+ --------------------------
+ -- POSIX.1c Section 13 --
+ --------------------------
+
+ PTHREAD_PRIO_NONE : constant := 0;
+ PTHREAD_PRIO_PROTECT : constant := 2;
+ PTHREAD_PRIO_INHERIT : constant := 1;
+
+ function pthread_mutexattr_setprotocol
+ (attr : access pthread_mutexattr_t;
+ protocol : int) return int;
+ pragma Import
+ (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
+
+ function pthread_mutexattr_getprotocol
+ (attr : access pthread_mutexattr_t;
+ protocol : access int) return int;
+ pragma Import
+ (C, pthread_mutexattr_getprotocol, "pthread_mutexattr_getprotocol");
+
+ function pthread_mutexattr_setprioceiling
+ (attr : access pthread_mutexattr_t;
+ prioceiling : int) return int;
+ pragma Import
+ (C, pthread_mutexattr_setprioceiling,
+ "pthread_mutexattr_setprioceiling");
+
+ function pthread_mutexattr_getprioceiling
+ (attr : access pthread_mutexattr_t;
+ prioceiling : access int) return int;
+ pragma Import
+ (C, pthread_mutexattr_getprioceiling,
+ "pthread_mutexattr_getprioceiling");
+
+ type struct_sched_param is record
+ sched_priority : int;
+ end record;
+ pragma Convention (C, struct_sched_param);
+
+ function pthread_getschedparam
+ (thread : pthread_t;
+ policy : access int;
+ param : access struct_sched_param) return int;
+ pragma Import (C, pthread_getschedparam, "pthread_getschedparam");
+
+ function pthread_setschedparam
+ (thread : pthread_t;
+ policy : int;
+ param : access struct_sched_param) return int;
+ pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
+
+ function pthread_attr_setscope
+ (attr : access pthread_attr_t;
+ contentionscope : int) return int;
+ pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
+
+ function pthread_attr_getscope
+ (attr : access pthread_attr_t;
+ contentionscope : access int) return int;
+ pragma Import (C, pthread_attr_getscope, "pthread_attr_getscope");
+
+ function pthread_attr_setinheritsched
+ (attr : access pthread_attr_t;
+ inheritsched : int) return int;
+ pragma Import
+ (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
+
+ function pthread_attr_getinheritsched
+ (attr : access pthread_attr_t;
+ inheritsched : access int) return int;
+ pragma Import
+ (C, pthread_attr_getinheritsched, "pthread_attr_getinheritsched");
+
+ function pthread_attr_setschedpolicy
+ (attr : access pthread_attr_t;
+ policy : int) return int;
+ pragma Import (C, pthread_attr_setschedpolicy,
+ "pthread_attr_setschedpolicy");
+
+ function pthread_attr_getschedpolicy
+ (attr : access pthread_attr_t;
+ policy : access int) return int;
+ pragma Import (C, pthread_attr_getschedpolicy,
+ "pthread_attr_getschedpolicy");
+
+ function pthread_attr_setschedparam
+ (attr : access pthread_attr_t;
+ sched_param : int) return int;
+ pragma Import (C, pthread_attr_setschedparam, "pthread_attr_setschedparam");
+
+ function pthread_attr_getschedparam
+ (attr : access pthread_attr_t;
+ sched_param : access int) return int;
+ pragma Import (C, pthread_attr_getschedparam, "pthread_attr_getschedparam");
+
+ function sched_yield return int;
+ pragma Import (C, sched_yield, "pthread_yield");
+
+ --------------------------
+ -- P1003.1c Section 16 --
+ --------------------------
+
+ function pthread_attr_init (attributes : access pthread_attr_t) return int;
+ pragma Import (C, pthread_attr_init, "pthread_attr_init");
+
+ function pthread_attr_destroy
+ (attributes : access pthread_attr_t) return int;
+ pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
+
+ function pthread_attr_setdetachstate
+ (attr : access pthread_attr_t;
+ detachstate : int) return int;
+ pragma Import
+ (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
+
+ function pthread_attr_getdetachstate
+ (attr : access pthread_attr_t;
+ detachstate : access int) return int;
+ pragma Import
+ (C, pthread_attr_getdetachstate, "pthread_attr_getdetachstate");
+
+ function pthread_attr_getstacksize
+ (attr : access pthread_attr_t;
+ stacksize : access size_t) return int;
+ pragma Import
+ (C, pthread_attr_getstacksize, "pthread_attr_getstacksize");
+
+ function pthread_attr_setstacksize
+ (attr : access pthread_attr_t;
+ stacksize : size_t) return int;
+ pragma Import
+ (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
+
+ function pthread_create
+ (thread : access pthread_t;
+ attributes : access pthread_attr_t;
+ start_routine : Thread_Body;
+ arg : System.Address) return int;
+ pragma Import (C, pthread_create, "pthread_create");
+
+ function pthread_detach (thread : pthread_t) return int;
+ pragma Import (C, pthread_detach, "pthread_detach");
+
+ procedure pthread_exit (status : System.Address);
+ pragma Import (C, pthread_exit, "pthread_exit");
+
+ function pthread_self return pthread_t;
+ pragma Import (C, pthread_self, "pthread_self");
+
+ --------------------------
+ -- POSIX.1c Section 17 --
+ --------------------------
+
+ function pthread_setspecific
+ (key : pthread_key_t;
+ value : System.Address) return int;
+ pragma Import (C, pthread_setspecific, "pthread_setspecific");
+
+ function pthread_getspecific (key : pthread_key_t) return System.Address;
+ pragma Import (C, pthread_getspecific, "pthread_getspecific");
+
+ type destructor_pointer is access procedure (arg : System.Address);
+ pragma Convention (C, destructor_pointer);
+
+ function pthread_key_create
+ (key : access pthread_key_t;
+ destructor : destructor_pointer) return int;
+ pragma Import (C, pthread_key_create, "pthread_key_create");
+
+ ------------------------------------
+ -- Non-portable Pthread Functions --
+ ------------------------------------
+
+ function pthread_set_name_np
+ (thread : pthread_t;
+ name : System.Address) return int;
+ pragma Import (C, pthread_set_name_np, "pthread_set_name_np");
+
+private
+
+ type sigset_t is array (1 .. 4) of unsigned;
+
+ -- In FreeBSD the component sa_handler turns out to
+ -- be one a union type, and the selector is a macro:
+ -- #define sa_handler __sigaction_u._handler
+ -- #define sa_sigaction __sigaction_u._sigaction
+
+ -- Should we add a signal_context type here ???
+ -- How could it be done independent of the CPU architecture ???
+ -- sigcontext type is opaque, so it is architecturally neutral.
+ -- It is always passed as an access type, so define it as an empty record
+ -- since the contents are not used anywhere.
+
+ type struct_sigcontext is null record;
+ pragma Convention (C, struct_sigcontext);
+
+ Self_PID : constant pid_t := 0;
+
+ type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+ .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
+
+ type timespec is record
+ ts_sec : time_t;
+ ts_nsec : long;
+ end record;
+ pragma Convention (C, timespec);
+
+ type pthread_t is new System.Address;
+ type pthread_attr_t is new System.Address;
+ type pthread_mutexattr_t is new System.Address;
+ type pthread_cond_t is new System.Address;
+ type pthread_condattr_t is new System.Address;
+ type pthread_key_t is new int;
+
+end System.OS_Interface;
