Set up to compile for FreeChainXenon (random system at the moment, just need to compile GCC stage 2)

- bump up release to 4.5.0

config.sub

@@ -1749,7 +1749,7 @@ case $os in
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-	     | fiwix* )
+	     | fiwix* | xenon* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)

libgloss/or1k/interrupts.c

@@ -35,10 +35,10 @@ void or1k_interrupt_handler_add(uint32_t id,
 {
 #ifdef __OR1K_MULTICORE__
 	_or1k_interrupt_handler_table[or1k_coreid()][id] = handler;
-	_or1k_interrupt_handler_data_ptr_table[or1k_coreid()][id] = (uint32_t) data_ptr;
+	_or1k_interrupt_handler_data_ptr_table[or1k_coreid()][id] = data_ptr;
 #else
 	_or1k_interrupt_handler_table[id] = handler;
-	_or1k_interrupt_handler_data_ptr_table[id] = (uint32_t) data_ptr;
+	_or1k_interrupt_handler_data_ptr_table[id] = data_ptr;
 #endif
 }
 

libgloss/or1k/or1k_uart.c

@@ -90,7 +90,7 @@ void (*_or1k_uart_read_cb)(char c);
  * This is the interrupt handler that is registered for the callback
  * function.
  */
-void _or1k_uart_interrupt_handler(uint32_t data)
+void _or1k_uart_interrupt_handler(void *data)
 {
 	uint8_t iir = REG8(IIR);
 

libgloss/or1k/or1k_uart.h

@@ -30,7 +30,7 @@ extern void (*_or1k_uart_read_cb)(char c);
 /**
  * The UART interrupt handler
  */
-void _or1k_uart_interrupt_handler(uint32_t data);
+void _or1k_uart_interrupt_handler(void *data);
 
 /**
  * Initialize UART

libgloss/or1k/sbrk.c

@@ -20,7 +20,7 @@
 #include "include/or1k-support.h"
 
 extern uint32_t	end; /* Set by linker.  */
-uint32_t _or1k_heap_start = &end;
+uint32_t _or1k_heap_start = (uint32_t) &end;
 uint32_t _or1k_heap_end;
 
 void *

newlib/NEWS

@@ -1,3 +1,19 @@
+*** Major changes in newlib version 4.5.0:
+
+- major clean-up of libgloss build including merging a number of platforms
+  into top-level Makefile (moxie, v850, i960, msp430, frv, i386, ...) and
+  removal of dead platforms such as xc16x
+- strverscmp fixed for comparison of digit sequence with non-digits
+- proper locking added from amdgcn
+- numerous improvements to arc support including support of 16-entry 
+  register file
+- long double complex functions are now skipped if long double != double
+- support for POSIX.1-2024 added to features.h
+- arc64: port added for Synopsys Designware ARCv3 ISA
+- sys/xtensa removed and replaced by machine/xtensa and libgloss
+- fixes to powf
+- fixes for building with gcc-15
+
 *** Major changes in newlib version 4.4.0:
 
 - long double support for i386, aarch64, and x86_64 added from FreeBSD

newlib/README

@@ -1,4 +1,4 @@
-                        README for newlib-4.2.0 release
+                        README for newlib-4.5.0 release
            (mostly cribbed from the README in the gdb-4.13 release)
 
 This is `newlib', a simple ANSI C library, math library, and collection
@@ -20,8 +20,8 @@ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 Unpacking and Installation -- quick overview
 ==========================
 
-When you unpack the newlib-4.2.0.tar.gz file, you'll find a directory
-called `newlib-4.2.0', which contains many files.  Interesting ones:
+When you unpack the newlib-4.5.0.tar.gz file, you'll find a directory
+called `newlib-4.5.0', which contains many files.  Interesting ones:
   COPYING*  - License files for the sources
   README    - A common overview of all GNU development projects
   configure - The build script for configuring the source tree
@@ -94,13 +94,13 @@ directory.  If the path to `configure' would be the same as the
 argument to `--srcdir', you can leave out the `--srcdir' option; it
 will be assumed.)
 
-   For example, with version 4.2.0, you can build NEWLIB in a separate
+   For example, with version 4.5.0, you can build NEWLIB in a separate
 directory for a Sun 4 cross m68k-aout environment like this:
 
-     cd newlib-4.2.0
+     cd newlib-4.5.0
      mkdir ../newlib-m68k-aout
      cd ../newlib-m68k-aout
-     ../newlib-4.2.0/configure --host=sun4 --target=m68k-aout
+     ../newlib-4.5.0/configure --host=sun4 --target=m68k-aout
      make
 
    When `configure' builds a configuration using a remote source
@@ -116,8 +116,8 @@ called `configure' (or one of its subdirectories).
 
    The `Makefile' that `configure' generates in each source directory
 also runs recursively.  If you type `make' in a source directory such
-as `newlib-4.2.0' (or in a separate configured directory configured with
-`--srcdir=PATH/newlib-4.2.0'), you will build all the required libraries.
+as `newlib-4.5.0' (or in a separate configured directory configured with
+`--srcdir=PATH/newlib-4.5.0'), you will build all the required libraries.
 
    When you have multiple hosts or targets configured in separate
 directories, you can run `make' on them in parallel (for example, if
@@ -530,7 +530,7 @@ Reporting Bugs
 
 The correct address for reporting bugs found in NEWLIB is
 "newlib@sourceware.org".  Please email all bug reports to that
-address.  Please include the NEWLIB version number (e.g., newlib-4.2.0),
+address.  Please include the NEWLIB version number (e.g., newlib-4.5.0),
 and how you configured it (e.g., "sun4 host and m68k-aout target").
 Since NEWLIB supports many different configurations, it is important
 that you be precise about this.

newlib/acinclude.m4

@@ -2,7 +2,7 @@ dnl This provides configure definitions used by all the newlib
 dnl configure.in files.
 
 AC_DEFUN([DEF_NEWLIB_MAJOR_VERSION],m4_define([NEWLIB_MAJOR_VERSION],[4]))
-AC_DEFUN([DEF_NEWLIB_MINOR_VERSION],m4_define([NEWLIB_MINOR_VERSION],[4]))
+AC_DEFUN([DEF_NEWLIB_MINOR_VERSION],m4_define([NEWLIB_MINOR_VERSION],[5]))
 AC_DEFUN([DEF_NEWLIB_PATCHLEVEL_VERSION],m4_define([NEWLIB_PATCHLEVEL_VERSION],[0]))
 AC_DEFUN([DEF_NEWLIB_VERSION],m4_define([NEWLIB_VERSION],[NEWLIB_MAJOR_VERSION.NEWLIB_MINOR_VERSION.NEWLIB_PATCHLEVEL_VERSION]))
 

newlib/configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for newlib 4.4.0.
+# Generated by GNU Autoconf 2.69 for newlib 4.5.0.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -576,8 +576,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='newlib'
 PACKAGE_TARNAME='newlib'
-PACKAGE_VERSION='4.4.0'
-PACKAGE_STRING='newlib 4.4.0'
+PACKAGE_VERSION='4.5.0'
+PACKAGE_STRING='newlib 4.5.0'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
@@ -1563,7 +1563,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures newlib 4.4.0 to adapt to many kinds of systems.
+\`configure' configures newlib 4.5.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1633,7 +1633,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of newlib 4.4.0:";;
+     short | recursive ) echo "Configuration of newlib 4.5.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1765,7 +1765,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-newlib configure 4.4.0
+newlib configure 4.5.0
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1857,7 +1857,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by newlib $as_me 4.4.0, which was
+It was created by newlib $as_me 4.5.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -4870,7 +4870,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='newlib'
- VERSION='4.4.0'
+ VERSION='4.5.0'
 
 
 # Some tools Automake needs.
@@ -6501,13 +6501,13 @@ fi
 
 
 
-$as_echo "#define _NEWLIB_VERSION \"4.4.0\"" >>confdefs.h
+$as_echo "#define _NEWLIB_VERSION \"4.5.0\"" >>confdefs.h
 
 
 $as_echo "#define __NEWLIB__ 4" >>confdefs.h
 
 
-$as_echo "#define __NEWLIB_MINOR__ 4" >>confdefs.h
+$as_echo "#define __NEWLIB_MINOR__ 5" >>confdefs.h
 
 
 $as_echo "#define __NEWLIB_PATCHLEVEL__ 0" >>confdefs.h
@@ -8460,7 +8460,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by newlib $as_me 4.4.0, which was
+This file was extended by newlib $as_me 4.5.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -8526,7 +8526,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-newlib config.status 4.4.0
+newlib config.status 4.5.0
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

newlib/configure.host

@@ -455,6 +455,9 @@ case "${host}" in
 	newlib_cflags="${newlib_cflags} -DHAVE_FCNTL -DHAVE_BLKSIZE -DHAVE_OPENDIR -DHAVE_RENAME"
 	newlib_cflags="${newlib_cflags} -DGETREENT_PROVIDED -DSIGNAL_PROVIDED"
 	;;
+  *-fcx-*)
+	sys_dir=amdgcn # Just use a random one for now, we don't use this yet.
+	;;
   a29k-*-*)
 	sys_dir=a29khif
 	signal_dir=

newlib/libc/libc.texi

@@ -69,8 +69,8 @@ into another language, under the above conditions for modified versions.
 @title The Red Hat newlib C Library
 @subtitle Full Configuration
 @sp 1
-@subtitle @code{libc} 4.4.0
-@subtitle December 2023
+@subtitle @code{libc} 4.5.0
+@subtitle December 2024
 @author Steve Chamberlain
 @author Roland Pesch
 @author Red Hat Support

newlib/libc/sys/or1k/mlock.c

@@ -38,6 +38,9 @@ volatile uint32_t _or1k_malloc_lock_restore;
 
 extern uint32_t or1k_sync_cas(void *address, uint32_t compare, uint32_t swap);
 
+extern uint32_t or1k_critical_begin();
+extern void or1k_critical_end(uint32_t restore);
+
 /**
  * Recursive lock of the malloc
  */

newlib/libm/libm.texi

@@ -46,8 +46,8 @@ into another language, under the above conditions for modified versions.
 @titlepage
 @title The Red Hat newlib C Math Library
 @sp 1
-@subtitle @code{libm} 4.4.0
-@subtitle December 2023
+@subtitle @code{libm} 4.5.0
+@subtitle December 2024
 @author Steve Chamberlain
 @author Roland Pesch
 @author Red Hat Support

winsup/cygwin/fhandler/process.cc

@@ -1098,7 +1098,6 @@ format_process_stat (void *data, char *&destbuf)
   unsigned long fault_count = 0UL,
 		vmsize = 0UL, vmrss = 0UL, vmmaxrss = 0UL;
   uint64_t utime = 0ULL, stime = 0ULL, start_time = 0ULL;
-  int nice = 0;
 /* ctty maj is 31:16, min is 15:0; tty_nr s/b maj 15:8, min 31:20, 7:0;
    maj is 31:16 >> 16 & fff << 8; min is 15:0 >> 8 & ff << 20 | & ff */
   int tty_nr = 0;
@@ -1131,6 +1130,8 @@ format_process_stat (void *data, char *&destbuf)
   else
     state = get_process_state (p->dwProcessId);
 
+  int nice = 0, prio = 0;
+
   NTSTATUS status;
   HANDLE hProcess;
   VM_COUNTERS vmc = { 0 };
@@ -1168,7 +1169,26 @@ format_process_stat (void *data, char *&destbuf)
       if (!NT_SUCCESS (status))
 	debug_printf ("NtQueryInformationProcess(ProcessQuotaLimits): "
 		      "status %y", status);
-      nice = winprio_to_nice (GetPriorityClass (hProcess));
+
+      nice = p->nice;
+      DWORD winprio = GetPriorityClass (hProcess);
+      if (p->sched_policy == SCHED_FIFO || p->sched_policy == SCHED_RR)
+	/* Linux proc_pid_stat(5): (18) priority - For processes running a
+	   real-time scheduling policy ..., this is the negated scheduling
+	   priority, minus one. */
+	prio = - winprio_to_schedprio (winprio) - 1; /* -33(high)...-2(low) */
+      else if (p->sched_policy == SCHED_IDLE)
+	/* Return the lowest priority unless no longer consistent. */
+	prio = NZERO + (winprio == IDLE_PRIORITY_CLASS ? NZERO - 1 :
+			winprio_to_nice (winprio));
+      else
+	{
+	  /* Use originally requested nice value unless no longer consistent. */
+	  bool batch = (p->sched_policy == SCHED_BATCH);
+	  if (winprio != nice_to_winprio (nice, batch))
+	    nice = winprio_to_nice (winprio, batch);
+	  prio = NZERO + nice; /* 0(high)...39(low) */
+	}
       CloseHandle (hProcess);
     }
   status = NtQuerySystemInformation (SystemTimeOfDayInformation,
@@ -1201,7 +1221,7 @@ format_process_stat (void *data, char *&destbuf)
 			  p->ppid, p->pgid, p->sid, tty_nr,
 			  -1, 0, fault_count, fault_count, 0, 0,
 			  utime, stime, utime, stime,
-			  NZERO + nice, nice, 0, 0,
+			  prio, nice, 0, 0,
 			  start_time,
 			  vmsize, vmrss, vmmaxrss
 			  );

winsup/cygwin/local_includes/miscfuncs.h

@@ -46,6 +46,8 @@ is_alt_numpad_event (PINPUT_RECORD pirec)
 
 int winprio_to_nice (DWORD prio, bool batch = false);
 DWORD nice_to_winprio (int &nice, bool batch = false);
+int winprio_to_schedprio (DWORD prio);
+DWORD schedprio_to_winprio (int schedprio);
 bool set_and_check_winprio (HANDLE proc, DWORD prio, bool set = true);
 
 bool create_pipe (PHANDLE, PHANDLE, LPSECURITY_ATTRIBUTES, DWORD);

winsup/cygwin/local_includes/pinfo.h

@@ -223,7 +223,7 @@ private:
   DWORD status_exit (DWORD);
 };
 
-#define MAX_PID 65536
+#define MAX_PID 4194304
 
 #define ISSTATE(p, f)	(!!((p)->process_state & f))
 #define NOTSTATE(p, f)	(!((p)->process_state & f))

winsup/cygwin/miscfuncs.cc

@@ -104,7 +104,7 @@ yield ()
 }
 
 /*
-   Mapping of nice value from/to Windows priority
+   Mapping of nice value or sched_priority from/to Windows priority
    ('batch' is used for SCHED_BATCH policy).
 
     nice_to_winprio()                                       winprio_to_nice()
@@ -115,6 +115,14 @@ yield ()
   -12...-5    -13..-19    3    ABOVE_NORMAL_PRIORITY_CLASS    -8      -16
   -13..-19         -20    4    HIGH_PRIORITY_CLASS           -16      -20
        -20           -    5    REALTIME_PRIORITY_CLASS       -20      -20
+
+   schedprio_to_winprio()                               winprio_to_schedprio()
+    1....6                0    IDLE_PRIORITY_CLASS             3
+    7...12                1    BELOW_NORMAL_PRIORITY_CLASS     9
+   13...18                2    NORMAL_PRIORITY_CLASS          15
+   19...24                3    ABOVE_NORMAL_PRIORITY_CLASS    21
+   25...30                4    HIGH_PRIORITY_CLASS            27
+   31...32                5    REALTIME_PRIORITY_CLASS        32
 */
 
 /* *_PRIORITY_CLASS -> 0...5 */
@@ -167,9 +175,25 @@ nice_to_winprio_impl (int nice, bool batch = false)
   return level_to_winprio (level);
 }
 
+/* *_PRIORITY_CLASS -> sched_priority */
+constexpr int
+winprio_to_schedprio_impl (DWORD prio)
+{
+  int level = winprio_to_level (prio);
+  return (level < 5 ? 3 + level * 6 : 32);
+}
+
+/* sched_priority -> *_PRIORITY_CLASS */
+constexpr DWORD
+schedprio_to_winprio_impl (int schedprio)
+{
+  int level = (schedprio <= 1 ? 0 : (schedprio < 32 ? (schedprio - 1) / 6 : 5));
+  return level_to_winprio (level);
+}
+
 /* Check consistency at compile time. */
 constexpr bool
-check_nice_winprio_mapping ()
+check_nice_schedprio_winprio_mapping ()
 {
   for (int nice = -NZERO; nice < NZERO; nice++)
     for (int batch = 0; batch <= 1; batch++) {
@@ -179,16 +203,28 @@ check_nice_winprio_mapping ()
       if (prio != prio2)
 	return false;
     }
+  for (int schedprio = 1; schedprio <= 32; schedprio++)
+    {
+      DWORD prio = schedprio_to_winprio_impl (schedprio);
+      int schedprio2 = winprio_to_schedprio_impl (prio);
+      DWORD prio2 = schedprio_to_winprio_impl (schedprio2);
+      if (prio != prio2)
+	return false;
+    }
   return true;
 }
 
-static_assert (check_nice_winprio_mapping());
+static_assert (check_nice_schedprio_winprio_mapping());
 static_assert (nice_to_winprio_impl(NZERO-1, false) == IDLE_PRIORITY_CLASS);
 static_assert (nice_to_winprio_impl(0, true) == BELOW_NORMAL_PRIORITY_CLASS);
 static_assert (winprio_to_nice_impl(BELOW_NORMAL_PRIORITY_CLASS, true) == 0);
 static_assert (nice_to_winprio_impl(0, false) == NORMAL_PRIORITY_CLASS);
 static_assert (winprio_to_nice_impl(NORMAL_PRIORITY_CLASS, false) == 0);
 static_assert (nice_to_winprio_impl(-NZERO, false) == REALTIME_PRIORITY_CLASS);
+static_assert (schedprio_to_winprio_impl(1) == IDLE_PRIORITY_CLASS);
+static_assert (schedprio_to_winprio_impl(15) == NORMAL_PRIORITY_CLASS);
+static_assert (winprio_to_schedprio_impl(NORMAL_PRIORITY_CLASS) == 15);
+static_assert (schedprio_to_winprio_impl(32) == REALTIME_PRIORITY_CLASS);
 
 /* Get a default value for the nice factor. */
 int
@@ -210,6 +246,20 @@ nice_to_winprio (int &nice, bool batch /* = false */)
   return nice_to_winprio_impl (nice, batch);
 }
 
+/* Get a default sched_priority from a Win32 priority. */
+int
+winprio_to_schedprio (DWORD prio)
+{
+  return winprio_to_schedprio_impl (prio);
+}
+
+/* Get a Win32 priority matching the sched_priority. */
+DWORD
+schedprio_to_winprio (int schedprio)
+{
+  return schedprio_to_winprio_impl (schedprio);
+}
+
 /* Set Win32 priority or return false on failure.  Also return
    false and revert to the original priority if a different (lower)
    priority is set instead.  Always revert to original priority if

winsup/cygwin/mm/mmap.cc

@@ -339,8 +339,8 @@ class mmap_record
 
     SIZE_T find_unused_pages (SIZE_T pages) const;
     bool match (caddr_t addr, SIZE_T len, caddr_t &m_addr, SIZE_T &m_len);
-    off_t map_pages (SIZE_T len);
-    bool map_pages (caddr_t addr, SIZE_T len);
+    off_t map_pages (SIZE_T len, int new_prot);
+    bool map_pages (caddr_t addr, SIZE_T len, int new_prot);
     bool unmap_pages (caddr_t addr, SIZE_T len);
     int access (caddr_t address);
 
@@ -373,7 +373,8 @@ class mmap_list
     void set (int nfd, struct stat *st);
     mmap_record *add_record (mmap_record &r);
     bool del_record (mmap_record *rec);
-    caddr_t try_map (void *addr, size_t len, int flags, off_t off);
+    caddr_t try_map (void *addr, size_t len, int new_prot, int flags,
+		     off_t off);
 };
 
 class mmap_areas
@@ -455,14 +456,15 @@ mmap_record::init_page_map (mmap_record &r)
 }
 
 off_t
-mmap_record::map_pages (SIZE_T len)
+mmap_record::map_pages (SIZE_T len, int new_prot)
 {
   /* Used ONLY if this mapping matches into the chunk of another already
      performed mapping in a special case of MAP_ANON|MAP_PRIVATE.
 
      Otherwise it's job is now done by init_page_map(). */
   DWORD old_prot;
-  debug_printf ("map_pages (fd=%d, len=%lu)", get_fd (), len);
+  debug_printf ("map_pages (fd=%d, len=%lu, new_prot=%y)", get_fd (), len,
+		new_prot);
   len = PAGE_CNT (len);
 
   off_t off = find_unused_pages (len);
@@ -470,7 +472,8 @@ mmap_record::map_pages (SIZE_T len)
     return (off_t) 0;
   if (!noreserve ()
       && !VirtualProtect (get_address () + off * wincap.page_size (),
-			  len * wincap.page_size (), gen_protect (),
+			  len * wincap.page_size (),
+			  ::gen_protect (new_prot, get_flags ()),
 			  &old_prot))
     {
       __seterrno ();
@@ -483,9 +486,10 @@ mmap_record::map_pages (SIZE_T len)
 }
 
 bool
-mmap_record::map_pages (caddr_t addr, SIZE_T len)
+mmap_record::map_pages (caddr_t addr, SIZE_T len, int new_prot)
 {
-  debug_printf ("map_pages (addr=%p, len=%lu)", addr, len);
+  debug_printf ("map_pages (addr=%p, len=%lu, new_prot=%y)", addr, len,
+		new_prot);
   DWORD old_prot;
   off_t off = addr - get_address ();
   off /= wincap.page_size ();
@@ -499,7 +503,8 @@ mmap_record::map_pages (caddr_t addr, SIZE_T len)
       }
   if (!noreserve ()
       && !VirtualProtect (get_address () + off * wincap.page_size (),
-			  len * wincap.page_size (), gen_protect (),
+			  len * wincap.page_size (),
+			  ::gen_protect (new_prot, get_flags ()),
 			  &old_prot))
     {
       __seterrno ();
@@ -614,7 +619,7 @@ mmap_list::del_record (mmap_record *rec)
 }
 
 caddr_t
-mmap_list::try_map (void *addr, size_t len, int flags, off_t off)
+mmap_list::try_map (void *addr, size_t len, int new_prot, int flags, off_t off)
 {
   mmap_record *rec;
 
@@ -628,7 +633,7 @@ mmap_list::try_map (void *addr, size_t len, int flags, off_t off)
 	  break;
       if (rec && rec->compatible_flags (flags))
 	{
-	  if ((off = rec->map_pages (len)) == (off_t) -1)
+	  if ((off = rec->map_pages (len, new_prot)) == (off_t) -1)
 	    return (caddr_t) MAP_FAILED;
 	  return (caddr_t) rec->get_address () + off;
 	}
@@ -646,7 +651,7 @@ mmap_list::try_map (void *addr, size_t len, int flags, off_t off)
 	  break;
       if (rec)
 	{
-	  if (u_addr > (caddr_t) addr || u_addr + len < (caddr_t) addr + len
+	  if (u_addr > (caddr_t) addr || u_addr + u_len < (caddr_t) addr + len
 	      || !rec->compatible_flags (flags))
 	    {
 	      /* Partial match only, or access mode doesn't match. */
@@ -655,7 +660,7 @@ mmap_list::try_map (void *addr, size_t len, int flags, off_t off)
 	      set_errno (EINVAL);
 	      return (caddr_t) MAP_FAILED;
 	    }
-	  if (!rec->map_pages ((caddr_t) addr, len))
+	  if (!rec->map_pages ((caddr_t) addr, len, new_prot))
 	    return (caddr_t) MAP_FAILED;
 	  return (caddr_t) addr;
 	}
@@ -1051,7 +1056,7 @@ go_ahead:
   /* Test if an existing anonymous mapping can be recycled. */
   if (map_list && anonymous (flags))
     {
-      caddr_t tried = map_list->try_map (addr, len, flags, off);
+      caddr_t tried = map_list->try_map (addr, len, prot, flags, off);
       /* try_map returns NULL if no map matched, otherwise it returns
 	 a valid address, or MAP_FAILED in case of a fatal error. */
       if (tried)

winsup/cygwin/pinfo.cc

@@ -239,7 +239,7 @@ pinfo::exit (DWORD n)
 }
 # undef self
 
-/* Return next free Cygwin PID between 2 and 65535, round-robin.  Each new
+/* Return next free Cygwin PID between 2 and MAX_PID, round-robin.  Each new
    PID is checked that it doesn't collide with an existing PID.  For that,
    just check if the "cygpid.PID" section exists. */
 pid_t

winsup/cygwin/release/3.5.5

@@ -61,3 +61,6 @@ Fixes:
 - Fix several problems triggered when a lot of SIGSTOP/SIGCONT signals
   are received rapidly.
   Addresses: https://cygwin.com/pipermail/cygwin/2024-November/256744.html
+
+- Fix the protection when mmap(2) recycles unused pages.
+  Addresses: https://cygwin.com/pipermail/cygwin/2024-December/256911.html

winsup/cygwin/release/3.6.0

@@ -69,3 +69,12 @@ What changed:
   each child process created with fork(2).
   Note: Windows does not offer alternative scheduling policies so
   this could only emulate API behavior.
+
+- If SCHED_FIFO or SCHED_RR is selected, the /proc/<PID>/stat field
+  '(18) priority' is now set to the negated sched_policy minus one.
+  If SCHED_IDLE is selected, this field is set to 39.  The '(19) nice'
+  field is now set to the originally requested nice value.
+
+- Raise maximum pid from 65536 to 4194304 to account for scenarios
+  with lots of CPUs and lots of tasks.
+  Addresses: https://cygwin.com/pipermail/cygwin/2024-December/256927.html

winsup/cygwin/sched.cc

@@ -120,29 +120,7 @@ sched_getparam (pid_t pid, struct sched_param *param)
       return -1;
     }
   /* calculate the unix priority. */
-  switch (pclass)
-    {
-    case IDLE_PRIORITY_CLASS:
-      param->sched_priority = 3;
-      break;
-    case BELOW_NORMAL_PRIORITY_CLASS:
-      param->sched_priority = 9;
-      break;
-    case NORMAL_PRIORITY_CLASS:
-    default:
-      param->sched_priority = 15;
-      break;
-    case ABOVE_NORMAL_PRIORITY_CLASS:
-      param->sched_priority = 21;
-      break;
-    case HIGH_PRIORITY_CLASS:
-      param->sched_priority = 27;
-      break;
-    case REALTIME_PRIORITY_CLASS:
-      param->sched_priority = 32;
-      break;
-    }
-
+  param->sched_priority = winprio_to_schedprio (pclass);
   return 0;
 }
 
@@ -244,18 +222,10 @@ sched_setparam_pinfo (pinfo & p, const struct sched_param *param)
   else if (p->sched_policy == SCHED_IDLE && pri == 0)
     /* Idle policy, ignore the nice value. */
     pclass = IDLE_PRIORITY_CLASS;
-  else if (1 <= pri && pri <= 6)
-    pclass = IDLE_PRIORITY_CLASS;
-  else if (pri <= 12)
-    pclass = BELOW_NORMAL_PRIORITY_CLASS;
-  else if (pri <= 18)
-    pclass = NORMAL_PRIORITY_CLASS;
-  else if (pri <= 24)
-    pclass = ABOVE_NORMAL_PRIORITY_CLASS;
-  else if (pri <= 30)
-    pclass = HIGH_PRIORITY_CLASS;
-  else if (pri <= 32)
-    pclass = REALTIME_PRIORITY_CLASS;
+  else if ((p->sched_policy == SCHED_FIFO || p->sched_policy == SCHED_RR)
+           && valid_sched_parameters (param))
+    /* Realtime policy, apply requested priority. */
+    pclass = schedprio_to_winprio (param->sched_priority);
   else
     {
       set_errno (EINVAL);

winsup/cygwin/sigproc.cc

@@ -1345,6 +1345,12 @@ wait_sig (VOID *)
 
   hntdll = GetModuleHandle ("ntdll.dll");
 
+  /* GetTickCount() here is enough because GetTickCount() - t0 does
+     not overflow until 49 days psss. Even if GetTickCount() overflows,
+     GetTickCount() - t0 returns correct value, since underflow in
+     unsigned wraps correctly. Pending a signal for more than 49
+     days makes no sense. */
+  DWORD t0 = GetTickCount ();
   for (;;)
     {
       DWORD nb;
@@ -1354,7 +1360,7 @@ wait_sig (VOID *)
       else if (sigq.start.next
 	       && PeekNamedPipe (my_readsig, NULL, 0, NULL, &nb, NULL) && !nb)
 	{
-	  yield ();
+	  Sleep (GetTickCount () - t0 > 10 ? 1 : 0);
 	  pack.si.si_signo = __SIGFLUSH;
 	}
       else if (!ReadFile (my_readsig, &pack, sizeof (pack), &nb, NULL))
@@ -1364,6 +1370,8 @@ wait_sig (VOID *)
 	  system_printf ("garbled signal pipe data nb %u, sig %d", nb, pack.si.si_signo);
 	  continue;
 	}
+      if (pack.si.si_signo != __SIGFLUSH)
+	t0 = GetTickCount ();
 
       sigq.retry = false;
       /* Don't process signals when we start exiting */

winsup/doc/posix.xml

@@ -1771,25 +1771,32 @@ Over-allocation on sparse files is entirely ignored on Windows.</para>
 
 <para><function>sched_setpolicy</function> only emulates API behavior
 because Windows does not offer alternative scheduling policies.
-If <literal>SCHED_OTHER</literal> is selected, the Windows priority is
-set according to the nice value.  If <literal>SCHED_FIFO</literal>
-or <literal>SCHED_RR</literal> is selected, the nice value is preserved
-and the Windows priority is set according to the
-<literal>sched_priority</literal> value.</para>
+If <literal>SCHED_OTHER</literal> or <literal>SCHED_BATCH</literal> is
+selected, the Windows priority is set according to the nice value.
+If <literal>SCHED_IDLE</literal> is selected, the Windows priority is
+set to <literal>IDLE_PRIORITY_CLASS</literal>.
+If <literal>SCHED_FIFO</literal> or <literal>SCHED_RR</literal> is
+selected, the nice value is preserved and the Windows priority is set
+according to the <literal>sched_priority</literal> value.
+If the <literal>SCHED_RESET_ON_FORK</literal> flag is set, realtime
+policies and negative nice values are dropped on
+<function>fork</function>.</para>
 
 <para><function>nice</function>, <function>setpriority</function>,
 <function>sched_setparam</function> and <function>sched_setpolicy</function>
-map the nice value (<literal>SCHED_OTHER</literal>) or the
-<literal>sched_priority</literal> (<literal>SCHED_FIFO</literal>,
-<literal>SCHED_RR</literal>) to Windows priority classes as follows:</para>
+map the nice value (<literal>SCHED_OTHER</literal>,
+<literal>SCHED_BATCH</literal>) or the <literal>sched_priority</literal>
+(<literal>SCHED_FIFO</literal>, <literal>SCHED_RR</literal>) to Windows
+priority classes as follows:</para>
 <screen>
-    nice value   sched_priority   Windows priority class
-     12...19      1....6          IDLE_PRIORITY_CLASS
-      4...11      7...12          BELOW_NORMAL_PRIORITY_CLASS
-     -4....3     13...18          NORMAL_PRIORITY_CLASS
-    -12...-5     19...24          ABOVE_NORMAL_PRIORITY_CLASS
-    -13..-19     25...30          HIGH_PRIORITY_CLASS
-         -20     31...32          REALTIME_PRIORITY_CLASS
+    SCHED_OTHER  SCHED_BATCH  SCHED_FIFO/RR
+    nice value   nice value   sched_priority   Windows priority class
+     12...19       4...19      1....6          IDLE_PRIORITY_CLASS
+      4...11      -4....3      7...12          BELOW_NORMAL_PRIORITY_CLASS
+     -4....3     -12...-5     13...18          NORMAL_PRIORITY_CLASS
+    -12...-5     -13..-19     19...24          ABOVE_NORMAL_PRIORITY_CLASS
+    -13..-19          -20     25...30          HIGH_PRIORITY_CLASS
+         -20            -     31...32          REALTIME_PRIORITY_CLASS
 </screen>
 The use of values which are mapped to the
 <literal>REALTIME_PRIORITY_CLASS</literal> require administrative