2025-04-20 09:57:01 +02:00
249 changed files with 1737 additions and 3504 deletions
--- a/.gitignore
+++ b/.gitignore
@ -3,7 +3,6 @@
 /prefix
 *.txt
 !CMakeLists.txt
-.vxsdk/

 # GiteaPC config files
 giteapc-config.make
--- a/3rdparty/tinymt32/rand.c
+++ b/3rdparty/tinymt32/rand.c
@ -12,9 +12,3 @@ int rand(void)
 {
 	return tinymt32_generate_uint32(&random) & 0x7fffffff;
 }
-
-__attribute__((constructor))
-static void init_prng(void)
-{
-	srand(1);
-}
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1,10 +1,15 @@
 cmake_minimum_required(VERSION 3.15)
-project(FxLibc VERSION 1.5.1 LANGUAGES C ASM)
+project(FxLibc VERSION 1.2.0 LANGUAGES C ASM)

 set(CMAKE_INSTALL_MESSAGE LAZY)

 # Options
+
 # * -DFXLIBC_TARGET=<vhex-sh, vhex-x86, casiowin-fx, casiowin-cg, gint>
+# * -DSHARED
+
+option(SHARED "Build a shared library")
+option(STANDARD_NAMESPACE "Use libc.a and put headers in global include folder")

 set(TARGET_FOLDERS ${FXLIBC_TARGET})
 # Install paths
@ -12,37 +17,44 @@ set(LIBDIR "lib")
 set(INCDIR "include")

 if(FXLIBC_TARGET STREQUAL vhex-sh)
-  list(APPEND TARGET_FOLDERS vhex sh-generic)
+  list(APPEND TARGET_FOLDERS vhex-generic sh-generic)
  set(FXLIBC_ARCH sh)
  add_definitions(-D__SUPPORT_VHEX_KERNEL)
-  set(CMAKE_INSTALL_PREFIX "${VXSDK_COMPILER_INSTALL}" CACHE PATH "..." FORCE)
-  set(INCDIR "${VXSDK_COMPILER_INSTALL}/include")
-  set(LIBDIR "${VXSDK_COMPILER_INSTALL}/lib")
+endif()
+
+if(FXLIBC_TARGET STREQUAL vhex-x86)
+  list(APPEND TARGET_FOLDERS vhex-generic x86-generic)
+  set(FXLIBC_ARCH x86)
+  add_definitions(-D__SUPPORT_VHEX_KERNEL)
+  # TODO: Maybe add -nostdinc (but that removes compiler-provided headers like
+  # <stddef.h>), or use another compiler than the system one?
+endif()
+
+if(FXLIBC_TARGET STREQUAL casiowin-fx)
+  list(APPEND TARGET_FOLDERS sh-generic)
+  set(FXLIBC_ARCH sh)
+  add_definitions(-D__SUPPORT_CASIOWIN_FX9860G)
+endif()
+
+if(FXLIBC_TARGET STREQUAL casiowin-cg)
+  list(APPEND TARGET_FOLDERS sh-generic)
+  set(FXLIBC_ARCH sh)
+  add_definitions(-D__SUPPORT_CASIOWIN_FXCG50)
 endif()

 if(FXLIBC_TARGET STREQUAL gint)
  list(APPEND TARGET_FOLDERS sh-generic)
  set(FXLIBC_ARCH sh)
-  set(FXLIBC_LTO 1)
  add_definitions(-D__SUPPORT_GINT)

  # Default to fxSDK install path
  if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
-    set(FXLIBC_PREFIX_IS_FXSDK 1 CACHE PATH "..." FORCE)
+    set(CMAKE_INSTALL_PREFIX "${FXSDK_COMPILER_INSTALL}" CACHE PATH "..." FORCE)
  endif()

-  if(FXLIBC_PREFIX_IS_FXSDK)
-    # Use the fxSDK paths; these variables are uncached so we are always up-to-
-    # date, even if the compiler is upgraded without removing the fxlibc build
-    # folder (which happens with GiteaPC)
-    execute_process(
-      COMMAND fxsdk path include
-      OUTPUT_VARIABLE INCDIR
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-    execute_process(
-      COMMAND fxsdk path lib
-      OUTPUT_VARIABLE LIBDIR
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
+  if(CMAKE_INSTALL_PREFIX STREQUAL "${FXSDK_COMPILER_INSTALL}")
+    set(LIBDIR ".")
+    set(INCDIR "include")
  endif()
 endif()

@ -50,28 +62,20 @@ if(sh-generic IN_LIST TARGET_FOLDERS)
  add_definitions(-D__SUPPORT_ARCH_SH)
 endif()

+if(x86-generic IN_LIST TARGET_FOLDERS)
+  add_definitions(-D__SUPPORT_ARCH_X86)
+endif()
+
 # TODO: Preprocessor definitions for configuration
 # configure_file()

 # libc.{a,so} libfxlibc.{a,so}

 add_compile_options(-Wall -Wextra -std=c11 -ffreestanding -Os)
-if(FXLIBC_PIC)
-  add_compile_options(-fpic)
-endif()
-if(FXLIBC_LTO)
-  add_compile_options(-flto)
-  # Generate the archive with gcc-ar instead of ar as it will load the LTO
-  # plugin which is required to generate a usable archive.
-  set(CMAKE_C_ARCHIVE_CREATE "${CMAKE_C_COMPILER_AR} qcs <TARGET> <OBJECTS>")
-  # Also the ranlib rule (useless because ar is passed the s flag anyway)
-  set(CMAKE_C_ARCHIVE_FINISH "${CMAKE_C_COMPILER_RANLIB} <TARGET>")
-endif()
-
 if(FXLIBC_ARCH STREQUAL sh)
  add_compile_options(
    "$<$<COMPILE_LANGUAGE:C>:-m3;-mb>"
-    "$<$<COMPILE_LANGUAGE:ASM>:-m4-nofpu;-mb>" -Wa,--dsp)
+    "$<$<COMPILE_LANGUAGE:ASM>:-m4-nofpu;-mb;-Wa,--dsp>")
 endif()

 # Building
@ -81,240 +85,187 @@ set(SOURCES
  3rdparty/grisu2b_59_56/grisu2b_59_56.c
  3rdparty/tinymt32/rand.c
  3rdparty/tinymt32/tinymt32.c
-  # C++ API details
-  src/dso.c
  # assert
-  src/assert/assert.c
+  src/libc/assert/assert.c
  # ctype
-  src/ctype/isalnum.c
-  src/ctype/isalpha.c
-  src/ctype/isblank.c
-  src/ctype/iscntrl.c
-  src/ctype/isdigit.c
-  src/ctype/isgraph.c
-  src/ctype/islower.c
-  src/ctype/isprint.c
-  src/ctype/ispunct.c
-  src/ctype/isspace.c
-  src/ctype/isupper.c
-  src/ctype/isxdigit.c
-  src/ctype/tolower.c
-  src/ctype/toupper.c
+  src/libc/ctype/isalnum.c
+  src/libc/ctype/isalpha.c
+  src/libc/ctype/isblank.c
+  src/libc/ctype/iscntrl.c
+  src/libc/ctype/isdigit.c
+  src/libc/ctype/isgraph.c
+  src/libc/ctype/islower.c
+  src/libc/ctype/isprint.c
+  src/libc/ctype/ispunct.c
+  src/libc/ctype/isspace.c
+  src/libc/ctype/isupper.c
+  src/libc/ctype/isxdigit.c
+  src/libc/ctype/tolower.c
+  src/libc/ctype/toupper.c
  # errno
-  src/errno/errno.c
+  src/libc/errno/errno.c
  # inttypes
-  src/inttypes/imaxabs.c
-  src/inttypes/imaxdiv.c
-  src/inttypes/strtoimax.c
-  src/inttypes/strtoumax.c
+  src/libc/inttypes/imaxabs.c
+  src/libc/inttypes/imaxdiv.c
+  src/libc/inttypes/strtoimax.c
+  src/libc/inttypes/strtoumax.c
  # locale
-  src/locale/setlocale.c
-  src/locale/localeconv.c
+  src/libc/locale/setlocale.c
+  src/libc/locale/localeconv.c
  # signal
-  src/signal/signal.c
-  src/signal/raise.c
+  src/libc/signal/signal.c
+  src/libc/signal/raise.c
  # stdio
-  src/stdio/asprintf.c
-  src/stdio/clearerr.c
-  src/stdio/dprintf.c
-  src/stdio/fclose.c
-  src/stdio/fdopen.c
-  src/stdio/ferror.c
-  src/stdio/feof.c
-  src/stdio/fflush.c
-  src/stdio/fgetc.c
-  src/stdio/fgetpos.c
-  src/stdio/fgets.c
-  src/stdio/fileno.c
-  src/stdio/fileutil.c
-  src/stdio/fopen.c
-  src/stdio/fprintf.c
-  src/stdio/fputc.c
-  src/stdio/fputs.c
-  src/stdio/fread.c
-  src/stdio/freopen.c
-  src/stdio/fscanf.c
-  src/stdio/fseek.c
-  src/stdio/fsetpos.c
-  src/stdio/ftell.c
-  src/stdio/fwrite.c
-  src/stdio/getc.c
-  src/stdio/getchar.c
-  src/stdio/gets.c
-  src/stdio/getline.c
-  src/stdio/getdelim.c
-  src/stdio/perror.c
-  src/stdio/printf.c
-  src/stdio/printf/format_fixed.c
-  src/stdio/printf/format_fp.c
-  src/stdio/printf/format_usual.c
-  src/stdio/printf/print.c
-  src/stdio/printf/util.c
-  src/stdio/putc.c
-  src/stdio/putchar.c
-  src/stdio/puts.c
-  src/stdio/remove.c
-  src/stdio/rewind.c
-  src/stdio/scanf.c
-  src/stdio/scanf/scan.c
-  src/stdio/setbuf.c
-  src/stdio/setvbuf.c
-  src/stdio/snprintf.c
-  src/stdio/sprintf.c
-  src/stdio/sscanf.c
-  src/stdio/streams.c
-  src/stdio/ungetc.c
-  src/stdio/vasprintf.c
-  src/stdio/vdprintf.c
-  src/stdio/vfprintf.c
-  src/stdio/vfscanf.c
-  src/stdio/vprintf.c
-  src/stdio/vscanf.c
-  src/stdio/vsnprintf.c
-  src/stdio/vsprintf.c
-  src/stdio/vsscanf.c
+  src/libc/stdio/asprintf.c
+  src/libc/stdio/dprintf.c
+  src/libc/stdio/fprintf.c
+  src/libc/stdio/printf.c
+  src/libc/stdio/printf/format_fixed.c
+  src/libc/stdio/printf/format_fp.c
+  src/libc/stdio/printf/format_usual.c
+  src/libc/stdio/printf/print.c
+  src/libc/stdio/printf/util.c
+  src/libc/stdio/putc.c
+  src/libc/stdio/puts.c
+  src/libc/stdio/snprintf.c
+  src/libc/stdio/sprintf.c
+  src/libc/stdio/vasprintf.c
+  src/libc/stdio/vdprintf.c
+  src/libc/stdio/vfprintf.c
+  src/libc/stdio/vprintf.c
+  src/libc/stdio/vsnprintf.c
+  src/libc/stdio/vsprintf.c
  # stdlib
-  src/stdlib/abort.c
-  src/stdlib/abs.c
-  src/stdlib/atexit.c
-  src/stdlib/atof.c
-  src/stdlib/atoi.c
-  src/stdlib/atol.c
-  src/stdlib/atoll.c
-  src/stdlib/calloc.c
-  src/stdlib/div.c
-  src/stdlib/exit.c
-  src/stdlib/labs.c
-  src/stdlib/ldiv.c
-  src/stdlib/llabs.c
-  src/stdlib/lldiv.c
-  src/stdlib/qsort.c
-  src/stdlib/reallocarray.c
-  src/stdlib/strto_fp.c
-  src/stdlib/strto_int.c
-  src/stdlib/strtod.c
-  src/stdlib/strtof.c
-  src/stdlib/strtol.c
-  src/stdlib/strtold.c
-  src/stdlib/strtoll.c
-  src/stdlib/strtoul.c
-  src/stdlib/strtoull.c
-  # unistd
-  src/unistd/_exit.c
+  src/libc/stdlib/abort.c
+  src/libc/stdlib/abs.c
+  src/libc/stdlib/atof.c
+  src/libc/stdlib/atoi.c
+  src/libc/stdlib/atol.c
+  src/libc/stdlib/atoll.c
+  src/libc/stdlib/calloc.c
+  src/libc/stdlib/div.c
+  src/libc/stdlib/exit.c
+  src/libc/stdlib/labs.c
+  src/libc/stdlib/ldiv.c
+  src/libc/stdlib/llabs.c
+  src/libc/stdlib/lldiv.c
+  src/libc/stdlib/qsort.c
+  src/libc/stdlib/reallocarray.c
+  src/libc/stdlib/strto_fp.c
+  src/libc/stdlib/strto_int.c
+  src/libc/stdlib/strtod.c
+  src/libc/stdlib/strtof.c
+  src/libc/stdlib/strtol.c
+  src/libc/stdlib/strtold.c
+  src/libc/stdlib/strtoll.c
+  src/libc/stdlib/strtoul.c
+  src/libc/stdlib/strtoull.c
  # string
-  src/string/memchr.c
-  src/string/memcmp.c
-  src/string/memcpy.c
-  src/string/memmove.c
-  src/string/memrchr.c
-  src/string/memset.c
-  src/string/strcasecmp.c
-  src/string/strcasestr.c
-  src/string/strcat.c
-  src/string/strchr.c
-  src/string/strchrnul.c
-  src/string/strcmp.c
-  src/string/strcoll.c
-  src/string/strcpy.c
-  src/string/strcspn.c
-  src/string/strdup.c
-  src/string/strerror.c
-  src/string/strlen.c
-  src/string/strncasecmp.c
-  src/string/strncat.c
-  src/string/strncmp.c
-  src/string/strncpy.c
-  src/string/strndup.c
-  src/string/strnlen.c
-  src/string/strpbrk.c
-  src/string/strrchr.c
-  src/string/strspn.c
-  src/string/strstr.c
-  src/string/strstr_base.c
-  src/string/strtok.c
-  src/string/strxfrm.c
-  # time
-  src/time/asctime.c
-  src/time/ctime.c
-  src/time/difftime.c
-  src/time/gmtime.c
-  src/time/localtime.c
-  src/time/mktime.c
-  src/time/strftime.c)
+  src/libc/string/memchr.c
+  src/libc/string/memcmp.c
+  src/libc/string/memcpy.c
+  src/libc/string/memmove.c
+  src/libc/string/memset.c
+  src/libc/string/strcasecmp.c
+  src/libc/string/strcasestr.c
+  src/libc/string/strcat.c
+  src/libc/string/strchr.c
+  src/libc/string/strchrnul.c
+  src/libc/string/strcmp.c
+  src/libc/string/strcoll.c
+  src/libc/string/strcpy.c
+  src/libc/string/strcspn.c
+  src/libc/string/strdup.c
+  src/libc/string/strerror.c
+  src/libc/string/strlen.c
+  src/libc/string/strncasecmp.c
+  src/libc/string/strncat.c
+  src/libc/string/strncmp.c
+  src/libc/string/strncpy.c
+  src/libc/string/strndup.c
+  src/libc/string/strnlen.c
+  src/libc/string/strpbrk.c
+  src/libc/string/strrchr.c
+  src/libc/string/strspn.c
+  src/libc/string/strstr.c
+  src/libc/string/strstr_base.c
+  src/libc/string/strtok.c
+  src/libc/string/strxfrm.c)

 # Silence extended warnings on Grisu2b code
 set_source_files_properties(3rdparty/grisu2b_59_56/grisu2b_59_56.c PROPERTIES
  COMPILE_OPTIONS "-Wno-all;-Wno-extra")

+if(vhex-generic IN_LIST TARGET_FOLDERS)
+  # TODO
+endif()
+
 if(vhex-sh IN_LIST TARGET_FOLDERS)
  list(APPEND SOURCES
-    src/stdlib/target/vhex-sh/free.c
-    src/stdlib/target/vhex-sh/malloc.c
-    src/stdlib/target/vhex-sh/realloc.c
-  )
+    src/libc/signal/target/vhex-sh/kill.S
+    src/libc/signal/target/vhex-sh/signal.S
+    src/libc/stdlib/target/vhex-sh/free.S
+    src/libc/stdlib/target/vhex-sh/malloc.S
+    src/libc/stdlib/target/vhex-sh/realloc.S
+    src/posix/fcntl/target/vhex-sh/open.S
+    src/posix/sys/wait/target/vhex-sh/wait.S
+    src/posix/sys/wait/target/vhex-sh/waitpid.S
+    src/posix/unistd/target/vhex-sh/read.S
+    src/posix/unistd/target/vhex-sh/getppid.S
+    src/posix/unistd/target/vhex-sh/close.S
+    src/posix/unistd/target/vhex-sh/fork_execve.S
+    src/posix/unistd/target/vhex-sh/lseek.S
+    src/posix/unistd/target/vhex-sh/getpid.S
+    src/posix/unistd/target/vhex-sh/getpgid.S
+    src/posix/unistd/target/vhex-sh/setpgid.S
+    src/posix/unistd/target/vhex-sh/write.S)
 endif()

 if(sh-generic IN_LIST TARGET_FOLDERS)
  list(APPEND SOURCES
-    src/setjmp/target/sh-generic/setjmp.S
-    src/setjmp/target/sh-generic/longjmp.S
-    src/string/target/sh-generic/memchr.S
-    src/string/target/sh-generic/memcmp.S
-    src/string/target/sh-generic/memcpy.S
-    src/string/target/sh-generic/memmove.S
-    src/string/target/sh-generic/memset.S
-    src/string/target/sh-generic/strlen.S
+    src/libc/setjmp/target/sh-generic/setjmp.S
+    src/libc/setjmp/target/sh-generic/longjmp.S
+    src/libc/string/target/sh-generic/memchr.S
+    src/libc/string/target/sh-generic/memcmp.S
+    src/libc/string/target/sh-generic/memcpy.S
+    src/libc/string/target/sh-generic/memmove.S
+    src/libc/string/target/sh-generic/memset.S
+    src/libc/string/target/sh-generic/strlen.S
    src/target/sh-generic/cpucap.c)
 endif()

 if(gint IN_LIST TARGET_FOLDERS)
  list(APPEND SOURCES
-    # stdlib
-    src/stdlib/target/gint/free.c
-    src/stdlib/target/gint/malloc.c
-    src/stdlib/target/gint/realloc.c
-    # time
-    src/time/target/gint/clock.c
-    src/time/target/gint/time.c)
+    src/libc/stdlib/target/gint/free.c
+    src/libc/stdlib/target/gint/malloc.c
+    src/libc/stdlib/target/gint/realloc.c)
+endif()
+
+if(casiowin-fx IN_LIST TARGET_FOLDERS)
+  list(APPEND SOURCES
+    src/posix/unistd/target/casiowin-fx/close.S)
 endif()



+# TODO: All targets

-#---
-# Handle "target-specific" fxlibc output format
-#---
-
-if(FXLIBC_TARGET STREQUAL vhex-sh)
-  set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE)
-  add_library(fxlibcStatic STATIC ${SOURCES})
-  add_library(fxlibcShared SHARED ${SOURCES})
-  set(FXLIBC_TARGET_LIBS "fxlibcStatic;fxlibcShared")
-else()
-  add_library(fxlibcStatic STATIC ${SOURCES})
-  set(FXLIBC_TARGET_LIBS "fxlibcStatic")
+add_library(fxlibc ${SOURCES})
+target_include_directories(fxlibc PRIVATE include/)
+if(sh-generic IN_LIST TARGET_FOLDERS)
+  target_include_directories(fxlibc PRIVATE "${FXSDK_COMPILER_INSTALL}/include/openlibm")
 endif()

-
-foreach(FXLIBC_LIB IN LISTS FXLIBC_TARGET_LIBS)
-
-  target_include_directories(${FXLIBC_LIB} PRIVATE include/)
-  foreach(FOLDER IN LISTS TARGET_FOLDERS)
-    target_include_directories(${FXLIBC_LIB} PRIVATE include/target/${FOLDER}/)
-  endforeach()
-
-  set_target_properties(${FXLIBC_LIB} PROPERTIES OUTPUT_NAME "c")
-
-  install(TARGETS ${FXLIBC_LIB} DESTINATION ${LIBDIR})
+foreach(FOLDER IN LISTS TARGET_FOLDERS)
+  target_include_directories(fxlibc PRIVATE include/target/${FOLDER}/)
 endforeach()

+set_target_properties(fxlibc PROPERTIES
+  OUTPUT_NAME "c") # libc.a

+# Install

-
-#---
-# Do not forget to install headers
-#---
-
+install(TARGETS fxlibc DESTINATION ${LIBDIR})
 install(DIRECTORY include/ DESTINATION ${INCDIR} PATTERN "target" EXCLUDE)

 foreach(FOLDER IN LISTS TARGET_FOLDERS)
--- a/README.md
+++ b/README.md
@ -1,4 +1,4 @@
-# fxlibc: The FX C Library
+# The FX C Library

 This directory contains the sources of the FxLibc Library. See `CMakeLists.txt`
 to see what release version you have.
@ -13,65 +13,65 @@ system.
 ---

 ## Dependencies
-
 FxLibc requires a GCC compiler toolchain the PATH to build for any calculator.
 You cannot build with your system compiler! The tutorial on Planète Casio
-builds an `sh-elf` toolchain that supports all models using multilib. See also
-[Lephenixnoir/sh-elf-gcc](/Lephenixnoir/sh-elf-gcc).
+builds an `sh-elf` toolchain that supports all models using multilib.

-For Vhex targets, the headers of the kernel are also required (but not for gint; the fxlibc is installed before gint).
+For Vhex and gint targets, the headers of the kernel are also required.

 ---

 ## Building and installing FxLibc
-
 FxLibc supports several targets:
 * Vhex on SH targets (`vhex-sh`)
 * CASIOWIN for fx-9860G-like calculators (`casiowin-fx`)
 * CASIOWIN for fx-CG-series calculators (`casiowin-cg`)
-* gint for all calculators (`gint`)
+* gint for all targets (`gint`)

 Each target supports different features depending on what the kernel/OS
 provides.

-For automated gint/fxSDK setups using [GiteaPC](/Lephenixnoir/GiteaPC) is recommended. The instructions below are for manual installs.
-
-#### Configuration
+#### Configuration and support

 Configure with CMake; specify the target with `-DFXLIBC_TARGET`. For SH
 platforms, set the toolchain to `cmake/toolchain-sh.cmake`.

-You can either install FxLibc in the compiler's `include` folder (for Vhex), or another folder of your choice (eg. the fxSDK sysroot). If you choose non-standard folders you might need `-I` and `-L` options to use the library.
+The FxLibc supports shared libraries when building with Vhex (TODO); set
+`-DSHARED=1` to enable this behavior.

-```bash
-# Install in the compiler's include folder
-% PREFIX="$(sh-elf-gcc -print-file-name=.)"
-# Install in the fxSDK sysroot
-% PREFIX="$(fxsdk path sysroot)"
-# Custom target
+You can either install FxLibc in the compiler's `include` folder, or installl
+in another location of your choice. In the second case, you will need a `-I`
+option when using the library.
+
+To use the compiler, set `PREFIX` like this:
+
+```
+% PREFIX=$(sh-elf-gcc -print-file-name=.)
+```
+
+To use another location, set `PREFIX` manually (recommended):
+
+```
 % PREFIX="$HOME/.sh-prefix/"
-# For gint, do not specify anything, the fxSDK will be used dynamically
 ```

 Example for a static Vhex build:

-```bash
+```
 % cmake -B build-vhex-sh -DFXLIBC_TARGET=vhex-sh -DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-sh.cmake -DCMAKE_INSTALL_PREFIX="$PREFIX"
 ```

-Or for a traditional gint/fxSDK build:
-
-```bash
-% cmake -B build-gint -DFXLIBC_TARGET=gint -DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-sh.cmake
-```
-
-#### Build and install
-
+#### Building
 Build in the directory specified in `cmake -B`.

-```bash
-% make -C build-X
-% make -C build-X install
+```
+% make -C build
+```
+
+To install, run the `install` target.
+
+```
+% make -C build install
 ```

 ---
--- a/254
+++ b/254
@ -31,49 +31,51 @@ TODO:       Function/symbol/macro is not implemented/defined
 BDEPS(...): Function/symbol/macro needs ... to build
 LDEPS(...): Function/symbol/macro needs ... to link
 TEST:       Function/symbol/macro needs to be tested
-:          Function/symbol/macro is defined, builds, links, and is tested
+DONE:       Function/symbol/macro is defined, builds, links, and is tested

 7.2 <assert.h>
-    7.2.1      assert                        LDEPS(fprintf,stderr)
+!   7.2.1 assert: LDEPS(fprintf,stderr)

 7.3 <complex.h> => OpenLibm

 7.4 <ctype.h>
-    7.4.1      is*                           -
-    7.4.2      to*                           -
+    7.4.1 is*: DONE
+    7.4.2 to*: DONE

 7.5 <errno.h>
-    7.5.2      EDOM, EILSEQ, ERANGE          -
+    7.5.2 EDOM EILSEQ ERANGE: DONE

 7.6 <fenv.h> => OpenLibm

 7.7 <float.h> => GCC

 7.8 <inttypes.h>
-    7.8.1      PRI* macros                   -
-    7.8.1      SCN* macros                   -
-    7.8.2.1    imaxabs                       -
-    7.8.2.2    imaxdiv                       -
-    7.8.2.3    strtoimax, strtoumax          -
-    7.8.2.4    wcstoimax, wcstoumax          TODO
+!   7.8.1   PRI* macros: LDEPS(*printf)
+!   7.8.1   SCN* macros: LDEPS(*scanf)
+    7.8.2.1 imaxabs: DONE
+    7.8.2.2 imaxdiv: DONE
+    7.8.2.3 strtoimax strtoumax: DONE
+!   7.8.2.4 wcstoimax wcstoumax: TODO

 7.9 <iso646.h> => GCC

 7.10 <limits.h> => GCC

 7.11 <locale.h>
-     7.11.1    setlocale                     TEST
-     7.11.2    localeconv                    TEST
+!    7.11.1 setlocale: TEST
+!    7.11.2 localeconv: TEST

 7.12 <math.h> => OpenLibm

 7.13 <setjmp.h>
-     7.13.1    setjmp                        -
-     7.13.2    longjmp                       -
+     7.13.1 setjmp: DONE
+     7.13.2 longjmp: DONE

 7.14 <signal.h>
-     7.14.1.1  signal                        -
-     7.14.1.2  raise                         -
+     7.14      sig_atomic_t SIG_DFL SIG_ERR SIG_IGN: DONE
+     7.14      SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM: DONE
+     7.14.1.1  signal: DONE
+     7.14.1.2  raise: DONE

 7.15 <stdarg.h> => GCC

@ -84,149 +86,93 @@ TEST:       Function/symbol/macro needs to be tested
 7.18 <stdint.h> => GCC

 7.19 <stdio.h>
-     7.19.1    Introduction                  - (no wide-oriented streams *)
-     7.19.1    stdin, stdout, stderr         -
-
-     7.19.4.1  remove                        TEST
-     7.19.4.2  rename                        TODO
-     7.19.4.3  tmpfile                       TODO
-     7.19.4.4  tmpnam                        TODO
-
-     7.19.5.1  fclose                        -
-     7.19.5.2  fflush                        - (fflush(NULL) not supported yet)
-     7.19.5.3  fopen                         -
-     (EXT)     fdopen                        -
-     7.19.5.4  freopen                       -
-     7.19.5.5  setbuf                        -
-     7.19.5.6  setvbuf                       -
-     (EXT)     fileno                        -
-
-     7.19.6.1  fprintf                       -
-     7.19.6.2  fscanf                        TEST
-     7.19.6.3  printf                        -
-     7.19.6.4  scanf                         TEST
-     7.19.6.5  snprintf                      -
-     7.19.6.6  sprintf                       -
-     7.19.6.7  sscanf                        TEST
-     7.19.6.8  vfprintf                      -
-     7.19.6.9  vfscanf                       TEST
-     7.19.6.10 vprintf                       -
-     7.19.6.11 vscanf                        TEST
-     7.19.6.12 vsnprintf                     -
-     7.19.6.13 vsprintf                      -
-     7.19.6.14 vsscanf                       TEST
-     (EXT)     asprintf                      -
-     (EXT)     vasprintf                     -
-     (EXT)     dprintf                       -
-     (EXT)     vdprintf                      -
-
-     7.19.7.1  fgetc                         -
-     7.19.7.2  fgets                         -
-     7.19.7.3  fputc                         -
-     7.19.7.4  fputs                         -
-     7.19.7.5  getc                          -
-     7.19.7.6  getchar                       -
-     7.19.7.7  gets                          -
-     7.19.7.8  putc                          -
-     7.19.7.9  putchar                       -
-     7.19.7.10 puts                          -
-     7.19.7.11 ungetc                        -
-     (EXT)     getline                       -
-     (EXT)     getdelim                      -
-
-     7.19.8.1  fread                         -
-     7.19.8.2  fwrite                        -
-
-     7.19.9.1  fgetpos                       -
-     7.19.9.2  fseek                         -
-     7.19.9.3  fsetpos                       -
-     7.19.9.4  ftell                         -
-     7.19.9.5  rewind                        -
-
-     7.19.10.1 clearerr                      -
-     7.19.10.2 feof                          -
-     7.19.10.3 ferror                        -
-     7.19.10.4 perror                        -
+     7.19.1  Introduction: TEST
+             TODO: Handle wide-oriented streams? (see notes)
+!    7.19.4  Operations on files: TODO
+!    7.19.5  File access functions: TODO
+!    7.19.6  Formatted input/output functions: TODO
+!    7.19.7  Character input/output functions: TODO
+!    7.19.8  Direct input/output functions: TODO
+!    7.19.9  File positioning functions: TODO
+!    7.19.10 Error-handling functions: TODO

 7.20 <stdlib.h>
-     7.20      MB_CUR_MAX                    TODO
-     7.20.1.1  atof                          -
-     7.20.1.2  atoi, atol, atoll             -
-     7.20.1.3  strtod, strtof, strtold       -
-     7.20.1.4  strtol, strtoul               -
-     7.20.1.4  strtoll, strtoull             -
-     7.20.2.1  rand                          -
-     7.20.2.2  srand                         -
-     7.20.3.1  calloc                        -
-     7.20.3.2  free                          - (gint)
-     7.20.3.3  malloc                        - (gint)
-     7.20.3.4  realloc                       - (gint)
-     7.20.4.1  abort                         - (stream flushing/closing/etc?)
-     7.20.4.2  atexit                        TEST
-     7.20.4.3  exit                          - (stream flushing/closing/etc?)
-     7.20.4.4  _Exit                         - (gint)
-     7.20.4.5  getenv                        TODO
-     7.20.4.6  system                        TODO
-     7.20.5.1  bsearch                       TODO
-     7.20.5.2  qsort                         TEST
-     7.20.6.1  abs, labs, llabs              -
-     7.20.6.2  div, ldiv, lldiv              -
-     7.20.7    Multibyte/wide char conv      TODO
-     7.20.8    Multibyte/wide string conv    TODO
-     (EXT)     __cxa_atexit                  TEST
-     (EXT)     __cxa_finalize                TEST
+     7.20      RAND_MAX: DONE
+!    7.20      MB_CUR_MAX: TODO
+     7.20.1.1  atof: DONE
+     7.20.1.2  atoi, atol, atoll: DONE
+     7.20.1.3  strtod, strtof, strtold: DONE
+     7.20.1.4  strtol, strtoul, strtoll, strtoull: DONE
+     7.20.2.1  rand: DONE
+     7.20.2.2  srand: DONE
+     7.20.3.1  calloc: DONE
+     7.20.3.2  free: DONE       (at least gint)
+     7.20.3.3  malloc: DONE     (at least gint)
+     7.20.3.4  realloc: DONE    (at least gint)
+     7.20.4.1  abort: DONE
+!    7.20.4.2  atexit: TODO
+     7.20.4.3  exit: DONE       (missing stream flushing/closing/etc)
+     7.20.4.4  _Exit: DONE      (gint only)
+!    7.20.4.5  getenv: TODO
+!    7.20.4.6  system: TODO
+!    7.20.5.1  bsearch: TODO
+!    7.20.5.2  qsort: TEST
+     7.20.6.1  abs, labs, llabs: DONE
+     7.20.6.2  div, ldiv, lldiv: DONE
+!    7.20.7  Multibyte/wide character conversion functions: TODO
+!    7.20.8  Multibyte/wide string conversion functions: TODO

 7.21 <string.h>
-     7.21.2.1  memcpy                        -
-     7.21.2.2  memmove                       - (Unoptimized: byte-by-byte)
-     7.21.2.3  strcpy                        -
-     7.21.2.4  strncpy                       -
-     7.21.3.1  strcat                        -
-     7.21.3.2  strncat                       -
-     7.21.4.1  memcmp                        -
-     7.21.4.2  strcmp                        -
-     7.21.4.3  strcoll                       -
-     7.21.4.4  strncmp                       -
-     7.21.4.5  strxfrm                       -
-     7.21.5.1  memchr                        -
-     7.21.5.2  strchr                        -
-     7.21.5.3  strcspn                       -
-     7.21.5.4  strpbrk                       -
-     7.21.5.5  strrchr                       -
-     7.21.5.6  strspn                        -
-     7.21.5.7  strstr                        -
-     7.21.5.8  strtok                        -
-     7.21.6.1  memset                        -
-     7.21.6.2  strerror                      -
-     7.21.6.3  strlen                        -
-     (EXT)     strnlen                       -
-     (EXT)     strchrnul                     -
-     (EXT)     strcasestr                    -
-     (EXT)     strcasecmp                    -
-     (EXT)     strncasecmp                   -
-     (EXT)     strdup                        -
-     (EXT)     strndup                       -
-     (EXT)     memrchr                       - (Unoptimized: byte-by-byte)
+     7.21.2.1  memcpy: DONE
+     7.21.2.2  memmove: DONE    (Unoptimized: byte-by-byte)
+     7.21.2.3  strcpy: DONE
+     7.21.2.4  strncpy: DONE
+     7.21.3.1  strcat: DONE
+     7.21.3.2  strncat: DONE
+     7.21.4.1  memcmp: DONE
+     7.21.4.2  strcmp: DONE
+     7.21.4.3  strcoll: DONE
+     7.21.4.4  strncmp: DONE
+     7.21.4.5  strxfrm: DONE
+     7.21.5.1  memchr: DONE
+     7.21.5.2  strchr: DONE
+     7.21.5.3  strcspn: DONE
+     7.21.5.4  strpbrk: DONE
+     7.21.5.5  strrchr: DONE
+     7.21.5.6  strspn: DONE
+     7.21.5.7  strstr: DONE
+     7.21.5.8  strtok: DONE
+     7.21.6.1  memset: DONE
+     7.21.6.2  strerror: DONE
+     7.21.6.3  strlen: DONE
+     Extensions:
+     - strnlen: DONE
+     - strchrnul: DONE
+     - strcasestr: DONE
+     - strcasecmp: DONE
+     - strncasecmp: DONE
+     - strdup: DONE
+     - strndup: DONE

 7.22 <tgmath.h> => GCC

 7.23 <time.h>
-     7.23.2.1  clock                         -
-     7.23.2.2  difftime                      -
-     7.23.2.3  mktime                        - (DST flag ignored)
-     7.23.2.4  time                          -
-     7.23.3.1  asctime                       -
-     7.23.3.2  ctime                         -
-     7.23.3.3  gmtime                        -
-     7.23.3.4  localtime                     - (No timezones; same as gmtime)
-     7.23.3.5  strftime                      - (No %g, %G, %U, %V, %W, %z, %Z)
+!    7.23.1    Components of time: TODO
+!    7.23.2.1  clock: TODO
+!    7.23.2.2  difftime: TODO
+!    7.23.2.3  mktime: TODO
+!    7.23.2.4  time: TODO
+!    7.23.3.1  asctime: TODO
+!    7.23.3.2  ctime: TODO
+!    7.23.3.3  gmtime: TODO
+!    7.23.3.4  localtime: TODO
+!    7.23.3.5  strftime: TODO

-7.24 <wchar.h>                               TODO (not a priority)
+7.24 <wchar.h>
+     TODO (not a priority)

-7.25 <wctype.h>                              TODO (not a priority)
-
-(EXT) <alloca.h>
-     (EXT)     alloca                        -
+7.25 <wctype.h>
+     TODO (not a priority)

 # Supporting locales

@ -238,11 +184,10 @@ What if we wanted to support more locales?
 -> Fix the "TODO: locale: ..." messages wherever assumptions on the locale are
   made in the code
 -> Properly implement strcoll() and strxfrm()
-> Add support in strftime()

 # Supporting text and binary files (newline translation)

-Because of 7.19.2§1.223 we don't need to support newline translation.
+Because of 7.19.2%1,223 we don't need to support newline translation.

 # Support wide-oriented streams

@ -250,8 +195,3 @@ This requires all the wide-char functions but also updating fpos_t to be a
 structure with at least some mbstate_t member (7.19.2§6).

 I really don't want to do that. Use multi-byte functions with UTF-8.
-
-# Supporting timezones
-
-> Update localtime()
-> Add some timezone API
--- a/cmake/toolchain-vhex.cmake
+++ b/cmake/toolchain-vhex.cmake
@ -1,24 +0,0 @@
-# Vhex toolchain file for chad Casio graphing calculators
-
-set(CMAKE_SYSTEM_NAME Generic)
-set(CMAKE_SYSTEM_VERSION 1)
-set(CMAKE_SYSTEM_PROCESSOR sh)
-
-set(CMAKE_C_COMPILER sh-elf-vhex-gcc)
-set(CMAKE_CXX_COMPILER sh-elf-vhex-g++)
-
-set(CMAKE_C_FLAGS_INIT "")
-set(CMAKE_CXX_FLAGS_INIT "")
-
-add_compile_options(-nostdlib)
-add_link_options(-nostdlib)
-
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
-
-if(NOT DEFINED ENV{VXSDK_COMPILER_SYSROOT})
-  message(FATAL_ERROR "You should use the vxSDK to build this project")
-endif()
-set(VXSDK_COMPILER_INSTALL $ENV{VXSDK_COMPILER_SYSROOT})
--- a/include/alloca.h
+++ b/include/alloca.h
@ -1,21 +0,0 @@
-#ifndef __ALLOCA_H__
-# define __ALLOCA_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <stddef.h>
-
-#undef alloca
-
-/* Allocate a block of memory on the stack. */
-extern void *alloca(size_t __size);
-
-#define alloca(size) __builtin_alloca(size)
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*__ALLOCA_H__*/
--- a/include/dirent.h
+++ b/include/dirent.h
@ -1,65 +0,0 @@
-#ifndef __DIRENT_H__
-# define __DIRENT_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <bits/types/DIR.h>
-#include <sys/types.h>
-
-#define DT_UNKNOWN   0  /* Unknown type */
-#define DT_BLK       1  /* Block device */
-#define DT_CHR       2  /* Character device */
-#define DT_DIR       3  /* Directory */
-#define DT_FIFO      4  /* FIFO */
-#define DT_LNK       5  /* Symbolic link */
-#define DT_REG       6  /* Regular file */
-#define DT_SOCK      7  /* Socket */
-
-/* In gint d_ino is unused; but it's required by POSIX.1. */
-struct dirent {
-    /* Inode number */
-    ino_t d_ino;
-    /* Type, to avoid doing an additional stat() on the file */
-    unsigned char d_type;
-    /* NUL-terminated file name */
-    char d_name[];
-};
-
-/* The underlying syscall to access directory entries is getdents(2). But it
-   has no unified interface and no glibc wrapper on Linux; it's basically
-   hidden. So we define the API directly at the level of readdir(3). gint does
-   not implement any lower-level interface and directly associates a DIR * with
-   a directory file descriptor. */
-
-/* Open a directory to inspect its contents. */
-extern DIR *opendir(const char *__name);
-
-/* Get the directory file descriptory associated with __dp. */
-extern int dirfd(DIR *__dp);
-
-/* Open a directory file descriptor to use as a directory stream. */
-extern DIR *fdopendir(int __fd);
-
-/* Read an entry from an open directory. */
-extern struct dirent *readdir(DIR *__dp);
-
-/* Get the current position within the directory. The particular value should
-   not be interpreted; it is just suitable to use in seekdir(). */
-extern long telldir(DIR *__dp);
-
-/* Seek into the directory; __pos should have been returned by telldir(). */
-extern void seekdir(DIR *__dp, long __pos);
-
-/* Rewind a directory to its start. */
-extern void rewinddir(DIR *__dp);
-
-/* Close an open directory. */
-extern int closedir(DIR *__dp);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*__DIRENT_H__*/
--- a/include/errno.h
+++ b/include/errno.h
@ -9,89 +9,9 @@ extern "C" {
   threads are supported. */
 extern int errno;

-#define EDOM          1   /* Outside of domain of math function. */
-#define EILSEQ        2   /* Illegal multi-byte character sequence. */
-#define ERANGE        3   /* Range error during text-to-numeric conversion. */
-#define EACCES        4   /* File access denied. */
-#define EEXIST        5   /* File already exists. */
-#define EINVAL        6   /* Invalid argument in general; lots of uses. */
-#define ENFILE        7   /* Out of file descriptors. */
-#define ENOENT        8   /* File or folder does not exist. */
-#define ENOMEM        9   /* System ran out of memory (RAM). */
-#define EDQUOT       10   /* Out of inodes or memory space. */
-#define ENOSPC       11   /* No space left on device. */
-#define ENOTSUP      12   /* Operation not supported. */
-#define EBADF        13   /* Invalid file descriptor. */
-#define ESPIPE       14   /* File descriptor is unable to seek. */
-#define EISDIR       15   /* File descriptor is a directory. */
-#define ENOTDIR      16   /* File descriptor is not a directory. */
-#define ENOTEMPTY    17   /* Directory is not empty. */
-#define EINTR        18   /* Interrupted system call. */
-#define EAGAIN       19   /* Resource temporarily unavailable. */
-#define EIO          20   /* Input/Output error */
-#define ENODEV       21   /* No such device */
-#define ENOMEDIUM    22   /* No medium found */
-#define EMEDIUMTYPE  23   /* Wrong medium type */
-
-/* Error codes used by libstdc++. */
-#define EAFNOSUPPORT 24
-#define EADDRINUSE   25
-#define EADDRNOTAVAIL 26
-#define EISCONN      27
-#define E2BIG        28
-#define EFAULT       29
-#define EPIPE        30
-#define ECONNABORTED 31
-#define EALREADY     32
-#define ECONNREFUSED 33
-#define ECONNRESET   34
-#define EXDEV        35
-#define EDESTADDRREQ 36
-#define EBUSY        37
-#define ENOEXEC      38
-#define EFBIG        39
-#define ENAMETOOLONG 40
-#define ENOSYS       41
-#define EHOSTUNREACH 42
-#define ENOTTY       43
-#define EMSGSIZE     44
-#define ENETDOWN     45
-#define ENETRESET    46
-#define ENETUNREACH  47
-#define ENOBUFS      48
-#define ECHILD       49
-#define ENOLCK       50
-#define ENOMSG       51
-#define ENOPROTOOPT  52
-#define ENXIO        53
-#define ESRCH        54
-#define ENOTSOCK     55
-#define ENOTCONN     56
-#define EINPROGRESS  57
-#define EPERM        58
-#define EOPNOTSUPP   59
-#define EWOULDBLOCK  60
-#define EPROTONOSUPPORT 61
-#define EROFS        62
-#define EDEADLK      63
-#define ETIMEDOUT    64
-#define EMFILE       65
-#define EMLINK       66
-#define ELOOP        67
-#define EPROTOTYPE   68
-#define EBADMSG      69
-#define EIDRM        70
-#define ENOLINK      71
-#define ENODATA      72
-#define ENOSR        73
-#define ECANCELED    74
-#define EOWNERDEAD   75
-#define EPROTO       76
-#define ENOTRECOVERABLE 77
-#define ETIME        78
-#define ETXTBUSY     79
-#define EOVERFLOW    80
-
+#define EDOM       1
+#define EILSEQ     2
+#define ERANGE     3

 #ifdef __cplusplus
 }
--- a/include/fcntl.h
+++ b/include/fcntl.h
@ -5,35 +5,21 @@
 extern "C" {
 #endif

-#include <stdio.h>
+#include <stddef.h>
 #include <stdint.h>
-#include <sys/types.h>

-/* Access mode. */
-#define O_RDONLY       0x0000
-#define O_WRONLY       0x0001
-#define O_RDWR         0x0002
-/* Create file if nonexistent. */
-#define O_CREAT        0x0004
-/* Fail if not a directory. */
-#define O_DIRECTORY    0x0008
-/* Append and truncate modes. */
-#define O_APPEND       0x0010
-#define O_TRUNC        0x0020
-/* Exclusive open requiring creation. */
-#define O_EXCL         0x0040
+/* also defined in <stdio.h> */
+#define SEEK_SET	0	/* Seek from beginning of file.  */
+#define SEEK_CUR	1	/* Seek from current position.  */
+#define SEEK_END	2	/* Seek from end of file.  */

-/* Create, truncate and open a file. */
-extern int creat(char const *__path, mode_t __mode);
-
-/* Open file and return a file descriptor, -1 on error. */
-extern int open(char const *__path, int __flags, ... /* mode_t __mode */);
-
-#define F_DUPFD        0
-#define F_GETFD        1
-#define F_SETFD        2
-
-extern int fcntl(int fd, int op, ...);
+/*
+** Open FILE and return a new file descriptor for it, or -1 on error.
+** OFLAG determines the type of access used.  If O_CREAT or O_TMPFILE is set
+** in OFLAG, the third argument is taken as a `mode_t', the mode of the
+** created file.
+*/
+extern int open(const char *pathname, int flags, ...);

 #ifdef __cplusplus
 }
--- a/include/fxlibc/printf.h
+++ b/include/fxlibc/printf.h
@ -11,7 +11,7 @@ extern "C" {
 ** parse options, lay out strings, and generate output.
 */

-#include <stdio.h>
+#include <bits/types/FILE.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdarg.h>
@ -75,6 +75,7 @@ extern int __printf(
 	va_list *__args);


+
 /* Format extension API. */

 struct __printf_format {
@ -83,8 +84,16 @@ struct __printf_format {
 	/* How much significant characters of data, meaning varies. */
 	int16_t precision;

-	/* Size of targeted integer type (%o, %x, %i, %d, %u), in bytes */
+	/*
+	** Size specifier for integers (%o, %x, %i, %d, %u), may be one of:
+	** (0)  char       (8-bit)
+	** (1)  short      (16-bit)
+	** (2)  int        (32-bit)
+	** (3)  long       (32-bit)
+	** (4)  long long  (64-bit)
+	*/
 	uint8_t size;
+
 	/* (#) Alternative form: base prefixes, decimal point. */
 	uint8_t alternative :1;
 	/* ( ) Add a blank sign before nonnegative numbers. */
@ -106,14 +115,15 @@ struct __printf_format {

 /*
 ** Type of format functions.
-** -> __out specifies the output and is used when generating text
-** -> __fmt contains the format options and specifier letter
+** -> __spec is the specifier letter (eg. "d" in "%d")
+** -> __opts are the length, precision, sign, alignment, etc. options
 ** -> __args is a pointer to the variable list of arguments to read from
 */
 typedef void __printf_formatter_t(
 	struct __printf_output *__out,
-	struct __printf_format *__fmt,
-	va_list *__args);
+	struct __printf_format *__opts,
+	va_list *__args
+);

 /*
 ** Register a new format.
@ -121,10 +131,10 @@ typedef void __printf_formatter_t(
 ** The formatter designated by the specified lowercase or uppercase letter
 ** (eg 'p' or 'P') is registered. This functions allows overriding default
 ** formatters, but this is very much discouraged. Letters with special meaning
-** in the standard cannot be changed. A formatter can be removed of disabled by
+** in the standard cannot be changed. A formatted can be removed of disabled by
 ** registering NULL.
 **
-** Here are the characters used/reserved in the C standard:
+** Here are used characters in the C standard:
 **
 ** a: Hexadecimal floating-point      A: Hexadecimal floating-point
 ** b: _                               B: _
@ -132,7 +142,7 @@ typedef void __printf_formatter_t(
 ** d: Decimal integer                 D: _
 ** e: Exponent floating-point         E: Exponent floating-point
 ** f: Floating-point                  F: Floating-point
-** g: General floating-point          G: General floating-point
+** g: General floating-point          G: General: floating-point
 ** h: short or char size              H: _
 ** i: Integer                         I: Locale-aware digits
 ** j: intmax_t size                   J: _
--- a/include/inttypes.h
+++ b/include/inttypes.h
@ -8,7 +8,7 @@ extern "C" {
 #include <stdint.h>
 #include <stdlib.h>

-/* Hide by default in C++ (7.8.1§1.182) */
+/* Hide by default in C++ (7.8.1§1.181) */
 #if !defined __cplusplus || defined __STDC_FORMAT_MACROS

 /* Printing signed fixed-width types, decimal */
--- a/include/signal.h
+++ b/include/signal.h
@ -7,10 +7,11 @@ extern "C" {

 #include <stddef.h>
 #include <stdint.h>
+#include <stdatomic.h>

 /* C99 API. */

-typedef int sig_atomic_t;
+typedef volatile atomic_int sig_atomic_t;

 /* Type of a signal handler.*/
 typedef void (*__sighandler_t)(int);
--- a/include/stdint.h
+++ b/include/stdint.h
@ -1,2 +0,0 @@
-/* We rely on GCC's default version. */
-#include "stdint-gcc.h"
--- a/include/stdio.h
+++ b/include/stdio.h
@ -7,99 +7,11 @@ extern "C" {

 #include <stddef.h>
 #include <stdarg.h>
-#include <stdint.h>
-#include <sys/types.h>

-#define __FILE_BUF_READ   0
-#define __FILE_BUF_WRITE  1
+/* Type of FILE handlers. */
+#include <bits/types/FILE.h>

-/* The FILE structure is mostly a buffer around kernel-level I/O. Most of the
-   work is maintaining that buffer to provide the basic fgetc()/fputc()
-   functions, then everything else is built on top of the abstracted stream.
-
-   The buffer of a FILE can either be in reading or writing mode. When in
-   reading mode, the buffer contains pre-fetched data from a previous read that
-   hasn't yet been requested by the user. When in writing mode, the buffer
-   contains data written by the user which hasn't yet been sent to the kernel.
-
-   The buffer has the following structure:
-
-       0     bufpos    bufread   bufsize
-       +--------+---------+---------+
-       |xxxxxxxx|rrrrrrrrr|uuuuuuuuu|    (When reading)
-       +--------+---------+---------+
-       |wwwwwwww|uuuuuuuuuuuuuuuuuuu|    (When writing)
-       +--------+-------------------+
-
-     x: Data read from file descriptor and returned to user
-     r: Data read from file descriptor not yet returned to user
-     w: Data written by user not yet sent to file descriptor
-     u: Undefined
-
-  In reading mode, the region [0..bufread) contains data obtained from the
-  file. bufpos marks how much has been read, in the sense that [0..bufpos) has
-  already been returned to the user while [bufpos..bufread) has not. The offset
-  on the underlying file descriptor sits at bufread, so the position reported
-  by ftell() is fdpos - bufread + bufpos. The rest of the buffer is undefined.
-
-  In writing mode, the region [0..bufpos) contains data received through API
-  but not yet written to the file descriptor. ftell() reports fdpos + bufpos.
-  The rest of the buffer is undefined.
-
-  The ungetc() function pushes back characters into the buffer; if the FILE is
-  unbuffered, then it's made buffered temporarily to hold the characters and
-  cleared at the next fflush() or read. The buffer is put in reading mode. For
-  this reason, reading functions should test [fp->buf] to check whether there
-  is a buffer instead of [fp->bufmode != _IONBF].
-
-  Many fields in the FILE structure are abstracted away by API calls in layers:
-
-  1. [fd], [fdpos] and [error] are updated by the primitive functions of
-     fileutil.c which essentially wrap kernel I/O (plus clearerr() obviously).
-  2. [buf], [bufsize], [bufmode] and [bufowned] are handled by setbuf(),
-     setvbuf() and fclose().
-  3. [bufpos], [bufread] and [bufdir] are set by primitive read/write functions
-     like fgets() or fwrite(), and cleared by fflush().
-  4. [readable], [writable], [append] and [text] are set by fopen() and
-     freopen(), and used as read-only by the primitive functions of 3. */
-typedef struct {
-	/* File descriptor */
-	int fd;
-	/* Current position in file, as tracked by the file descriptor (ie. not
-	   accounting for buffer operations) */
-	size_t fdpos;
-
-	/* Pointer to buffer (NULL if _IONBF) */
-	char *buf;
-	/* Current position in buffer, water mark of read data in buffer, and
-	   buffer size; see header comment for details */
-	size_t bufpos;
-	size_t bufread;
-	size_t bufsize;
-	/* Number of ungetc()'d characters at the start of buffer data */
-	int bufungetc;
-	/* Buffering mode; one of _IOFBF, _IOLBF, or _IONBF */
-	uint8_t bufmode   :2;
-	/* We own the buffer and it needs to be freed */
-	uint8_t bufowned  :1;
-	/* __FILE_BUF_READ if the buffer is in reading mode
-	   __FILE_BUF_WRITE if it's in writing mode
-	   This mode can only be changed immediately after fflush(). */
-	uint8_t bufdir    :1;
-
-	/* Opening flags */
-	uint8_t readable  :1;
-	uint8_t writable  :1;
-	uint8_t append    :1;
-	/* Non-zero if text mode, zero if binary mode */
-	uint8_t text      :1;
-	/* EOF indicator */
-	uint8_t eof       :1;
-	/* Error indicator */
-	uint8_t error     :1;
-} FILE;
-
-/* Type of positions within files. We don't have wide-oriented streams. */
+/* Type of positions within files. */
 typedef size_t fpos_t;

 /* Buffering modes. */
@ -108,7 +20,8 @@ typedef size_t fpos_t;
 #define _IONBF 2

 /* Some buffer size for file buffering. */
-#define BUFSIZ 512
+/* TODO: We might want a larger BUFSIZ than 256 on fx-CG 50. */
+#define BUFSIZ 256

 /* End-of-file marker. */
 #define EOF ((int)(-1))
@ -125,9 +38,9 @@ typedef size_t fpos_t;
 #define L_tmpnam FILENAME_MAX

 /* Seeking positions. */
-#define SEEK_CUR 1
-#define SEEK_END 2
-#define SEEK_SET 3
+#define SEEK_CUR 0
+#define SEEK_END 1
+#define SEEK_SET 2

 /* Maximum number of unique filenames that tmpnam can generate. */
 /* TODO: Set a useful value in TMP_MAX other than 16*16*16 */
@ -142,54 +55,6 @@ extern FILE *stderr;
 #define stdout stdout
 #define stderr stderr

-/*
-** Operations on files.
-*/
-
-/* Remove a file from the filesystem.
-   In gint, the file must not be open (open files' names are not tracked). */
-extern int remove(char const *__filename);
-
-extern int rename(char const *__old, char const *__new);
-
-extern FILE *tmpfile(void);
-
-extern char *tmpnam(char *__s);
-
-/*
-** File access functions.
-*/
-
-/* Flush the stream and disassociate it from the underlying file. */
-extern int fclose(FILE *__fp);
-
-/* Flush any written data in the FILE's internal buffer. */
-extern int fflush(FILE *__fp);
-
-/* Open a file and associate a stream with it. */
-extern FILE *fopen(
-	char const * __restrict__ __filename,
-	char const * __restrict__ __mode);
-
-/* Open a file descriptor and associate a stream with it. */
-extern FILE *fdopen(int __fd, char const *__mode);
-
-/* Reopen a stream with another file, or change its mode. */
-extern FILE *freopen(
-	char const * __restrict__ __filename,
-	char const * __restrict__ __mode,
-	FILE * __restrict__ __fp);
-
-/* Use __buf as a buffer (of size BUFSIZ) for access to __fp. */
-extern void setbuf(FILE * __restrict__ __fp, char * __restrict__ __buf);
-
-/* Changer the buffering mode and buffer address for __fp. */
-extern int setvbuf(FILE * __restrict__ __fp, char * __restrict__ __buf,
-	int __mode, size_t __size);
-
-/* Return the file descriptor associated with __fp. */
-extern int fileno(FILE *__fp);
-
 /*
 ** Formatted input/output functions.
 **
@ -271,126 +136,6 @@ extern int asprintf(char ** __restrict__ __str,
 extern int vasprintf(char ** __restrict__ __str,
 	char const * __restrict__ __format, va_list __args);

-/* Formatted scan from file. */
-extern int fscanf(FILE * __restrict__ __fp,
-	char const * __restrict__ __format, ...);
-
-/* Formatted scan from stdin. */
-extern int scanf(
-	char const * __restrict__ __format, ...);
-
-/* Formatted scan from string. */
-extern int sscanf(const char * __restrict__ __s,
-	char const * __restrict__ __format, ...);
-
-/* Formatted scan from file (variable argument list). */
-extern int vfscanf(FILE * __restrict__ __fp,
-	char const * __restrict__ __format, va_list __args);
-
-/* Formatted scan from stdin (variable argument list). */
-extern int vscanf(
-	char const * __restrict__ __format, va_list __args);
-
-/* Formatted scan from string (variable argument list). */
-extern int vsscanf(char const * __restrict__ __s,
-	char const * __restrict__ __format, va_list __args);
-
-/*
-** Character input/output functions.
-*/
-
-/* Read a character from a stream. */
-extern int fgetc(FILE *__fp);
-
-/* Read at most n characters from a stream, stopping after a newline. */
-extern char *fgets(char * __restrict__ __s, int __n,
-	FILE * __restrict__ __fp);
-
-/* Write a character to a stream. */
-extern int fputc(int __c, FILE *__fp);
-
-/* Write a string to a stream (excluding the NUL nyte). */
-extern int fputs(char const * __restrict__ __s, FILE * __restrict__ __fp);
-
-extern int getc(FILE *__fp);
-#define getc fgetc
-
-/* Get a character from stdin */
-extern int getchar(void);
-#define getchar() fgetc(stdin)
-
-/* (DEPRECATED; use fgets() instead) Read a string from stdin. */
-extern char *gets(char *__s);
-
-/* Get a line from stream, with dynamic allocation */
-extern ssize_t getline(char ** __restrict__ __lineptr,
-	size_t * __restrict__ __n, FILE * __restrict__ __fp);
-
-/* Like getline but with [delim] instead of '\n' */
-extern ssize_t getdelim(char ** __restrict__ __lineptr,
-	size_t * __restrict__ __n, int __delim, FILE * __restrict__ __fp);
-
-extern int putc(int __c, FILE *__fp);
-#define putc fputc
-
-/* Write a character to stdout */
-extern int putchar(int __c);
-#define putchar(__c) fputc(__c, stdout)
-
-/* Write a string to stdout, followed by a newline */
-extern int puts(char const *__s);
-
-/* Un-read a character back to the stream; only one ungetc() is guaranteed, and
-   the character is lost after reading, writing or flushing. */
-extern int ungetc(int __c, FILE *__fp);
-
-/*
-** Direct input/output functions.
-*/
-
-/* Read an array of items from a stream. */
-extern size_t fread(void * __restrict__ __ptr, size_t __size, size_t __nmemb,
-	FILE * __restrict__ __fp);
-
-/* Write an array of items to a stream. */
-extern size_t fwrite(void const * __restrict__ __ptr, size_t __size,
-	size_t __nmemb, FILE * __restrict__ __fp);
-
-/*
-** File positioning functions.
-*/
-
-/* Get current position (same as ftell() unless wide-oriented). */
-extern int fgetpos(FILE * __restrict__ __fp, fpos_t * __restrict__ __pos);
-
-/* Set the current position. */
-extern int fseek(FILE *__fp, long __offset, int __whence);
-
-/* Restore the position to a value returned by fgetpos(). */
-extern int fsetpos(FILE *__fp, fpos_t const *__pos);
-
-/* Get the current position. */
-extern long ftell(FILE *__fp);
-
-/* Sets the file position to the start of the stream. */
-extern void rewind(FILE *__fp);
-
-/*
-** Error-handling functions.
-*/
-
-/* Clear EOF and error flags in the stream. */
-extern void clearerr(FILE *__fp);
-
-/* Test the EOF flag. */
-extern int feof(FILE *__fp);
-
-/* Test the error flag. */
-extern int ferror(FILE *__fp);
-
-/* Print a message followed by strerror(errno) to stdout. */
-extern void perror(char const *__s);
-
 #ifdef __cplusplus
 }
 #endif
--- a/include/stdlib.h
+++ b/include/stdlib.h
@ -38,9 +38,6 @@ extern void free(void *__ptr);
 __attribute__((noreturn))
 extern void abort(void);

-/* Register a function to be called at program exit. */
-extern int atexit(void (*__func)(void));
-
 /* Exit; calls handlers, flushes and closes streams and temporary files. */
 __attribute__((noreturn))
 extern void exit(int __status);
@ -49,10 +46,6 @@ extern void exit(int __status);
 __attribute__((noreturn))
 extern void _Exit(int __status);

-extern char *getenv(char const *__name);
-
-extern int system(char const *__string);
-
 /* Integer arithmetic functions. */

 extern int abs(int __j);
@ -149,20 +142,15 @@ extern long double strtold(
 #define RAND_MAX 0x7fffffff

 /* Seed the PRNG. */
-extern void srand(unsigned int __seed);
+extern void srand(unsigned int seed);

 /* Generate a pseudo-random number between 0 and RAND_MAX. */
 extern int rand(void);

 /* Searching and sorting utilities. */

-extern void *bsearch(void const *__key,
-	void const *__base, size_t __nmemb, size_t __size,
-	int (*__compare)(void const *, void const *));
-
-extern void qsort(
-	void *__base, size_t __nmemb, size_t __size,
-	int (*__compare)(void const *, void const *));
+void qsort(void *base, size_t nmemb, size_t size,
+	int (*compare)(void const *left, void const *right));

 #ifdef __cplusplus
 }
--- a/include/string.h
+++ b/include/string.h
@ -54,9 +54,6 @@ extern size_t strxfrm(char * __restrict__ __dest,
 /* Search __c within the first __n characters of __s. */
 extern void *memchr(void const *__s, int __c, size_t __n);

-/* Search the last occurrence of __c withing the first __n bytes of __s. */
-extern void *memrchr(void const *__s, int __c, size_t __n);
-
 /* Find the first occurrence of __c within __s. */
 extern char *strchr(char const *__s, int __c);

--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@ -7,7 +7,6 @@ extern "C" {

 #include <stddef.h>
 #include <stdint.h>
-#include <sys/types.h>

 #ifndef __KERNEL_MEMORY_H__
 // mapping flags
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@ -5,79 +5,41 @@
 extern "C" {
 #endif

-#include <sys/types.h>
-#include <time.h>
+/* File types.  */
+#define	__S_IFMT	0170000	/* These bits determine file type.  */
+#define	__S_IFDIR	0040000	/* Directory.  */
+#define	__S_IFCHR	0020000	/* Character device.  */
+#define	__S_IFBLK	0060000	/* Block device.  */
+#define	__S_IFREG	0100000	/* Regular file.  */
+#define	__S_IFIFO	0010000	/* FIFO.  */
+#define	__S_IFLNK	0120000	/* Symbolic link.  */
+#define	__S_IFSOCK	0140000	/* Socket.  */

-/* File types; taken from inode(7), any values would probably work. */
-#define S_IFMT       0170000
-#define S_IFIFO      0010000   /* FIFO */
-#define S_IFCHR      0020000   /* Character device */
-#define S_IFDIR      0040000   /* Directory */
-#define S_IFBLK      0060000   /* Block device */
-#define S_IFREG      0100000   /* Regular file */
-#define S_IFLNK      0120000   /* Symbolic link */
-#define S_IFSOCK     0140000   /* Socket */
+/* Protection bits.  */
+#define	__S_ISUID	0004000	/* Set user ID on execution.  */
+#define	__S_ISGID	0002000	/* Set group ID on execution.  */
+#define	__S_ISVTX	0001000	/* Save swapped text after use (sticky).  */
+#define	__S_IREAD	0000400	/* Read by owner.  */
+#define	__S_IWRITE	0000200	/* Write by owner.  */
+#define	__S_IEXEC	0000100	/* Execute by owner.  */

-/* Shortcuts to check file types from a mode_t value */
-#define S_ISREG(m)   (((m) & S_IFMT) == S_IFREG)
-#define S_ISDIR(m)   (((m) & S_IFMT) == S_IFDIR)
-#define S_ISCHR(m)   (((m) & S_IFMT) == S_IFCHR)
-#define S_ISBLK(m)   (((m) & S_IFMT) == S_IFBLK)
-#define S_ISFIFO(m)  (((m) & S_IFMT) == S_IFIFO)
-#define S_ISLNK(m)   (((m) & S_IFMT) == S_IFLNK)
-#define S_ISSOCK(m)  (((m) & S_IFMT) == S_IFSOCK)
+#define	S_IRUSR	__S_IREAD	/* Read by owner.  */
+#define	S_IWUSR	__S_IWRITE	/* Write by owner.  */
+#define	S_IXUSR	__S_IEXEC	/* Execute by owner.  */
+/* Read, write, and execute by owner.  */
+#define	S_IRWXU	(__S_IREAD|__S_IWRITE|__S_IEXEC)

-/* Protection bits of a mode_t  */
-#define S_ISUID      0004000   /* Set user ID on execution */
-#define S_ISGID      0002000   /* Set group ID on execution */
-#define S_ISVTX      0001000   /* Sticky bit */
-/* Usual permissions */
-#define S_IRWXU      00700
-#define S_IRUSR      00400
-#define S_IWUSR      00200
-#define S_IXUSR      00100
-#define S_IRWXG      00070
-#define S_IRGRP      00040
-#define S_IWGRP      00020
-#define S_IXGRP      00010
-#define S_IRWXO      00007
-#define S_IROTH      00004
-#define S_IWOTH      00002
-#define S_IXOTH      00001
+#define	S_IRGRP	(S_IRUSR >> 3)	/* Read by group.  */
+#define	S_IWGRP	(S_IWUSR >> 3)	/* Write by group.  */
+#define	S_IXGRP	(S_IXUSR >> 3)	/* Execute by group.  */
+/* Read, write, and execute by group.  */
+#define	S_IRWXG	(S_IRWXU >> 3)

-struct stat {
-    off_t      st_size;
-    mode_t     st_mode;
-
-    /* In gint, the struct stat only has the file size and file type. The
-       protection bits of (st_mode) are always 00777. The following fields all
-       have undefined values. */
-
-    dev_t      st_dev;
-    ino_t      st_ino;
-    nlink_t    st_nlink;
-    uid_t      st_uid;
-    gid_t      st_gid;
-    dev_t      st_rdev;
-    blksize_t  st_blksize;
-    blkcnt_t   st_blocks;
-
-    struct timespec st_atim;
-    struct timespec st_mtim;
-    struct timespec st_ctim;
-};
-
-#define st_atime st_atim.tv_sec
-#define st_mtime st_mtim.tv_sec
-#define st_ctime st_ctim.tv_sec
-
-/* Obtain information about an entry in the filesystem. */
-extern int stat(char const * __restrict__ __pathname,
-    struct stat * __restrict__ __statbuf);
-
-extern int chmod(char const *__pathname, mode_t mode);
-
-extern int fstat(int __fd, struct stat *__buf);
+#define	S_IROTH	(S_IRGRP >> 3)	/* Read by others.  */
+#define	S_IWOTH	(S_IWGRP >> 3)	/* Write by others.  */
+#define	S_IXOTH	(S_IXGRP >> 3)	/* Execute by others.  */
+/* Read, write, and execute by others.  */
+#define	S_IRWXO	(S_IRWXG >> 3)

 #ifdef __cplusplus
 }
--- a/include/sys/types.h
+++ b/include/sys/types.h
@ -8,38 +8,24 @@ extern "C" {
 #include <stddef.h>
 #include <stdint.h>

-/* Number of blocks in a file */
-typedef uint16_t blkcnt_t;
+// Define properly off_t type.
+# ifndef __off_t_defined
+typedef uint32_t off_t;
+#  define __off_t_defined
+# endif

-/* Size of a file block */
-typedef uint16_t blksize_t;
-
-/* Device identifier, with a major and minor byte */
-typedef uint16_t dev_t;
-
-/* Type of group identifiers on the system */
-typedef uint16_t gid_t;
-
-/* Inode number */
-typedef uint32_t ino_t;
-
-/* Holds a file's type and permissions bits */
-typedef int16_t mode_t;
-
-/* Number of hard links to a file */
-typedef uint16_t nlink_t;
-
-/* Offset within a file or stream; also, file size */
-typedef int32_t off_t;
-
-/* Process identifier */
-typedef int16_t pid_t;
-
-/* Signed size_t which can hold the value -1 */
+// Define properly ssize_t type.
+#ifndef	__ssize_t_defined
 typedef int32_t ssize_t;
+# define __ssize_t_defined
+#endif

-/* Type of user identifiers on the system */
-typedef uint16_t uid_t;
+// Define alias
+//FIXME: potential conflict with the real glibc(?)
+typedef int32_t pid_t;
+typedef int16_t mode_t;
+typedef uint16_t dev_t;
+typedef uint16_t umode_t;

 #ifdef __cplusplus
 }
--- a/include/target/casiowin-cg/bits/__trapa.h
+++ b/include/target/casiowin-cg/bits/__trapa.h
@ -0,0 +1,22 @@
+#ifndef __BITS_TRAPA_H__
+# define __BITS_TRAPA_H__
+
+/*
+** Normally the SH3/SH4 processor provide a "trapa" instruction which allow
+** tipping between userland and kernel. But Casio's don't use this method
+** (this is why we are always in "privilegied mode" and we can do whatever
+** we whant) but use custom calling convention to access the syscall call.
+**
+** The convention whant that the user jump into the syscall trampoline code
+** located at 0x80010070 for fx9860g and 0x80020070 for fxcg20/50.
+*/
+# define casio_trapa(id)		\
+	mov.l	syscall_table, r2	;\
+	mov.l	syscall_id, r0		;\
+	jmp	@r2			;\
+	nop				;\
+.align 4				;\
+syscall_table:	.long 0x80020070	;\
+syscall_id:	.long id
+
+#endif /*__BITS_TRAPA_H__*/
--- a/include/target/casiowin-cg/bits/asm/unistd_32.h
+++ b/include/target/casiowin-cg/bits/asm/unistd_32.h
@ -0,0 +1,34 @@
+#ifndef __BITS_UNISTD_32_H__
+# define __BITS_UNISTD_32_H__
+
+// File manipulation
+#define __NR_BFile_Remove	0x00001db4
+#define __NR_BFile_Create	0x00001dae
+#define __NR_BFile_Open		0x00001da3
+#define __NR_BFile_Close	0x00001da4
+#define __NR_BFile_Size		0x00001da6
+#define __NR_BFile_Write	0x00001daf
+#define __NR_BFile_Read		0x00001dac
+#define __NR_BFile_FindFirst	0x00001db7
+#define __NR_BFile_FindNext	0x00001db9
+#define __NR_BFile_FindClose	0x00001dba
+
+// Keyboard interface
+#define __NR_PutKeyCode		0x000012c6
+#define __NR_GetKeyWait		0x000012bf
+#define __NR_ClearKeyBuffer	0x000012c7
+#define __NR_GetVRAMAddress	0x000001e6
+
+// Memory management
+#define __NR_Bmem_malloc	0x00001f44
+#define __NR_Bmem_free		0x00001f42
+#define __NR_Bmem_calloc	0x00001f40
+#define __NR_Bmem_realloc	0x00001f46
+
+// Timer interface
+#define __NR_Timer_Install	0x000008d9
+#define __NR_Timer_Deinstall	0x000008da
+#define __NR_Timer_Start	0x000008db
+#define __NR_Timer_Stop		0x000008dc
+
+#endif /*__BITS_UNISTD_32_H__*/
--- a/include/target/casiowin-cg/bits/confname.h
+++ b/include/target/casiowin-cg/bits/confname.h
--- a/include/target/casiowin-cg/bits/exit.h
+++ b/include/target/casiowin-cg/bits/exit.h
--- a/include/target/casiowin-cg/bits/types/FILE.h
+++ b/include/target/casiowin-cg/bits/types/FILE.h
@ -0,0 +1,7 @@
+#ifndef __BITS_TYPES_FILE_H__
+# define __BITS_TYPES_FILE_H__
+
+typedef struct {
+} FILE;
+
+#endif /*__BITS_TYPES_FILE_H__*/
--- a/include/target/casiowin-fx/bits/asm/unistd_32.h
+++ b/include/target/casiowin-fx/bits/asm/unistd_32.h
@ -0,0 +1,57 @@
+#ifndef __BITS_UNISTD_32_H__
+# define __BITS_UNISTD_32_H__
+
+// File manipulation
+#define __NR_Bfile_CreateFile	0x00000434
+#define __NR_Bfile_OpenFile	0x0000042c
+#define __NR_Bfile_WriteFile	0x00000435
+#define __NR_Bfile_ReadFile	0x00000432
+#define __NR_Bfile_SeekFile	0x00000431
+#define __NR_Bfile_CloseFile	0x0000042d
+#define __NR_Bfile_FindFirst	0x0000043b
+#define __NR_Bfile_FindNext	0x0000043c
+#define __NR_Bfile_FindClose	0x0000043d
+#define __NR_Bfile_GetMediaFree	0x0000042e
+#define __NR_Bfile_RemoveFile	0x00000439
+
+// Display syscalls
+#define __NR_Bdisp_GetVRAM	0x00000135
+#define __NR_Bdisp_DrawLine	0x00000030
+#define __NR_Bdisp_AllClr_VRAM	0x00000143
+#define __NR_Bdisp_Display	0x00000028
+#define __NR_Bdisp_PrintMini	0x00000c4f
+#define __NR_Bdisp_ClearArea	0x0000014b
+#define __NR_Bdisp_ReverseArea	0x0000014d
+#define __NR_Bdisp_RestoreDisp	0x00000814
+#define __NR_Bdisp_SaveDisp	0x00000813
+
+// Keyboard primitives
+#define __NR_Bkey_GetKey	0x0000090f
+#define __NR_Bkey_PutKeycode	0x0000024f
+#define __NR_BKey_GetKeyWait	0x00000247
+
+// Memory management
+#define __NR_Bmem_malloc	0x00000acd
+#define __NR_Bmem_realloc	0x00000e6d
+#define __NR_Bmem_called	0x00000e6b
+#define __NR_Bmem_free		0x00000acc
+
+// USB primitive
+#define __NR_USB_Open		0x000002ac	// not sure
+#define __NR_USB_Close		0x000004a4	// not sure
+
+// SD Card primitives
+#define __NR_SDC_Init		0x0000017a	// not sure
+#define __NR_SDC_Mount		0x0000044b	// not sure
+#define __NR_SDC_Umount		0x0000044a
+
+// Timer interface
+#define __NR_TimerInstall	0x00000118
+#define __NR_TimerDeinstall	0x00000119
+#define __NR_TimerStart		0x0000011a
+#define __NR_TimerStop		0x0000011b
+
+// power management
+#define __NR_PowerOff		0x000003f4
+
+#endif /*__BITS_UNISTD_32__*/
--- a/include/target/casiowin-fx/bits/confname.h
+++ b/include/target/casiowin-fx/bits/confname.h
@ -0,0 +1,7 @@
+#ifndef __BITS_CONFNAME_H__
+# define __BITS_CONFNAME_H__
+
+#define _SC_PAGE_SIZE	0
+#define _SC_PAGESIZE	_SC_PAGE_SIZE
+
+#endif /*__BITS_CONFNAME_H__*/
--- a/include/target/casiowin-fx/bits/exit.h
+++ b/include/target/casiowin-fx/bits/exit.h
@ -0,0 +1,8 @@
+#ifndef __BITS_EXIT_H__
+# define __BITS_EXIT_H__
+
+/* Exit codes for CASIOWIN add-ins. */
+#define EXIT_SUCCESS 1
+#define EXIT_FAILURE 0
+
+#endif /*__BITS_EXIT_H__*/
--- a/include/target/casiowin-fx/bits/trapa.h
+++ b/include/target/casiowin-fx/bits/trapa.h
@ -0,0 +1,22 @@
+#ifndef __BITS_TRAPA_H__
+# define __BITS_TRAPA_H__
+
+/*
+** Normally the SH3/SH4 processor provide a "trapa" instruction which allow
+** tipping between userland and kernel. But Casio's don't use this method
+** (this is why we are always in "privilegied mode" and we can do whatever
+** we whant) but use custom calling convention to access the syscall call.
+**
+** The convention whant that the user jump into the syscall trampoline code
+** located at 0x80010070 for fx9860g and 0x80020070 for fxcg20/50.
+*/
+# define casio_trapa(id)		\
+	mov.l	syscall_table, r2	;\
+	mov.l	syscall_id, r0		;\
+	jmp	@r2			;\
+	nop				;\
+.align 4				;\
+syscall_table:	.long 0x80010070	;\
+syscall_id:	.long id
+
+#endif /*__BITS_TRAPA_H__*/
--- a/include/target/casiowin-fx/bits/types/FILE.h
+++ b/include/target/casiowin-fx/bits/types/FILE.h
@ -0,0 +1,7 @@
+#ifndef __BITS_TYPES_FILE_H__
+# define __BITS_TYPES_FILE_H__
+
+typedef struct {
+} FILE;
+
+#endif /*__BITS_TYPES_FILE_H__*/
--- a/include/target/gint/bits/types/DIR.h
+++ b/include/target/gint/bits/types/DIR.h
@ -1,12 +0,0 @@
-#ifndef __BITS_TYPES_DIR_H__
-# define __BITS_TYPES_DIR_H__
-
-#include <stddef.h>
-#include <stdint.h>
-
-typedef struct {
-	/* Associated directory descriptor */
-	int fd;
-} DIR;
-
-#endif /*__BITS_TYPES_DIR_H__*/
--- a/include/target/gint/bits/types/FILE.h
+++ b/include/target/gint/bits/types/FILE.h
@ -0,0 +1,17 @@
+#ifndef __BITS_TYPES_FILE_H__
+# define __BITS_TYPES_FILE_H__
+
+#include <stddef.h>
+
+typedef struct {
+	/* BFile handler */
+	int fd;
+	/* Current position in file */
+	size_t pos;
+	/* Buffering mode */
+	// TODO
+	/* Opening mode */
+	// TODO
+} FILE;
+
+#endif /*__BITS_TYPES_FILE_H__*/
--- a/include/target/vhex-generic/bits/asm/unistd_32.h
+++ b/include/target/vhex-generic/bits/asm/unistd_32.h
@ -0,0 +1,45 @@
+#ifndef __BITS_ASM_UNISTD_32_H__
+# define __BITS_ASM_UNISTD_32_H__
+
+// Define the number of syscall
+#define __NR_MAX		21
+
+// Kernel Test
+#define __NR_test_syscall	0
+
+// Process
+#define __NR_exit 		1
+#define __NR_fork_execve 	2 // (custom)
+#define __NR_waitpid 		3
+#define __NR_wait 		4
+#define __NR_getpid 		5
+#define __NR_getppid 		6
+#define __NR_getpgid 		7
+#define __NR_setpgid 		8
+
+// Signal
+#define __NR_signal 		9
+#define __NR_sigreturn 		10
+#define __NR_sigaction 		11
+#define __NR_kill 		12
+#define __NR_sigprogmask	13
+#define __NR_sigpending		14
+#define __NR_sigaltstack	15
+
+// VFS
+#define __NR_read 		16
+#define __NR_write		17
+#define __NR_open 		18
+#define __NR_close 		19
+#define __NR_lseek 		20
+#define __NR_pread 		21
+#define __NR_pwrite		22
+
+// Memory
+#define __NR_mmap		23
+#define __NR_munmap		24
+#define __NR_proc_heap_alloc	25 // (custom)
+#define __NR_proc_heap_free	26 // (custom)
+#define __NR_proc_heap_realloc	27 // (custom)
+
+#endif /*__BITS_ASM_UNISTD_32_H__*/
--- a/include/target/vhex-generic/bits/confname.h
+++ b/include/target/vhex-generic/bits/confname.h
@ -0,0 +1,8 @@
+#ifndef __BITS_CONFNAME_H__
+# define __BITS_CONFNAME_H__
+
+//FIXME: this part is probably arch-specific(?)
+#define _SC_PAGE_SIZE	0
+#define _SC_PAGESIZE	_SC_PAGE_SIZE
+
+#endif /*__BITS_CONFNAME_H__*/
--- a/include/target/vhex-generic/bits/exit.h
+++ b/include/target/vhex-generic/bits/exit.h
@ -0,0 +1,7 @@
+#ifndef __BITS_EXIT_H__
+# define __BITS_EXIT_H__
+
+#define EXIT_SUCCESS 0
+#define EXIT_FAILURE 1
+
+#endif /*__BITS_EXIT_H__*/
--- a/include/target/vhex-generic/bits/fcntl.h
+++ b/include/target/vhex-generic/bits/fcntl.h
@ -0,0 +1,9 @@
+#ifndef __BITS_FCNTL_H__
+# define __BITS_FCNTL_H__
+
+/* open/fcntl. */
+#define O_RDONLY	0
+#define O_WRONLY	1
+#define O_RDWR 		2
+
+#endif /*__BITS_FCNTL_H__*/
--- a/include/target/vhex-generic/bits/sigaction.h
+++ b/include/target/vhex-generic/bits/sigaction.h
@ -0,0 +1,12 @@
+#ifndef __BITS_SIGACTION_H__
+# define __BITS_SIGACTION_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Values for the HOW argument to `sigprocmask'. */
+#define SIG_BLOCK	0	/* Block signals. */
+#define SIG_UNBLOCK	1	/* Unblock signals. */
+#define SIG_SETMASK	2	/* Set the set of blocked signals. */
+
+#endif /*__BITS_SIGACTION_H__*/
--- a/include/target/vhex-generic/bits/signum.h
+++ b/include/target/vhex-generic/bits/signum.h
@ -0,0 +1,50 @@
+#ifndef __BITS_SIGNUM_H__
+# define __BITS_SIGNUM_H__
+
+// Define the number of signals
+#define _NSIG		32
+
+// Vhex kernel internal define used to indicate
+// if the signal is implemented or not
+#define __SIGUNDEF	((__sighandler_t) -2) /* Not implemented */
+
+/* Fake signal functions.  */
+#define	SIG_ERR		((__sighandler_t) -1)	/* Error return.  */
+#define	SIG_DFL		((__sighandler_t)  0)	/* Default action.  */
+#define	SIG_IGN		((__sighandler_t)  1)	/* Ignore signal.  */
+
+/* ISO C99 signals.  */
+#define	SIGINT		2	/* Interactive attention signal.  */
+#define	SIGILL		4	/* Illegal instruction.  */
+#define	SIGABRT		6	/* Abnormal termination.  */
+#define	SIGFPE		8	/* Erroneous arithmetic operation.  */
+#define	SIGSEGV		11	/* Invalid access to storage.  */
+#define	SIGTERM		15	/* Termination request.  */
+
+/* Historical signals specified by POSIX. */
+#define	SIGHUP		1	/* Hangup.  */
+#define	SIGQUIT		3	/* Quit.  */
+#define	SIGTRAP		5	/* Trace/breakpoint trap.  */
+#define	SIGKILL		9	/* Killed.  */
+#define SIGBUS		10	/* Bus error.  */
+#define	SIGSYS		12	/* Bad system call.  */
+#define	SIGPIPE		13	/* Broken pipe.  */
+#define	SIGALRM		14	/* Alarm clock.  */
+
+/* New(er) POSIX signals (1003.1-2008, 1003.1-2013).  */
+#define	SIGURG		16	/* Urgent data is available at a socket.  */
+#define	SIGSTOP		17	/* Stop, unblockable.  */
+#define	SIGTSTP		18	/* Keyboard stop.  */
+#define	SIGCONT		19	/* Continue.  */
+#define	SIGCHLD		20	/* Child terminated or stopped.  */
+#define	SIGTTIN		21	/* Background read from control terminal.  */
+#define	SIGTTOU		22	/* Background write to control terminal.  */
+#define	SIGPOLL		23	/* Pollable event occurred (System V).  */
+#define	SIGXCPU		24	/* CPU time limit exceeded.  */
+#define	SIGXFSZ		25	/* File size limit exceeded.  */
+#define	SIGVTALRM	26	/* Virtual timer expired.  */
+#define	SIGPROF		27	/* Profiling timer expired.  */
+#define	SIGUSR1		30	/* User-defined signal 1.  */
+#define	SIGUSR2		31	/* User-defined signal 2.  */
+
+#endif /*__BITS_SIGNUM_H__*/
--- a/include/target/vhex-generic/bits/types/FILE.h
+++ b/include/target/vhex-generic/bits/types/FILE.h
@ -0,0 +1,13 @@
+#ifndef __BITS_TYPES_FILE_H__
+# define __BITS_TYPES_FILE_H__
+
+// opaque definition of the _IO_FILE
+struct _IO_FILE;
+
+/*
+** The opaque type of streams.
+** This is the definition used elsewhere.
+*/
+typedef struct _IO_FILE FILE;
+
+#endif /*__BITS_TYPES_FILE_H__*/
--- a/include/target/vhex-generic/bits/types/__FILE.h
+++ b/include/target/vhex-generic/bits/types/__FILE.h
@ -0,0 +1,8 @@
+#ifndef __BITS_TYPES___FILE_H__
+# define ___BITS_TYPES___FILE_H__
+
+// define opaque definition of the FILE type
+struct _IO_FILE;
+typedef struct _IO_FILE __FILE;
+
+#endif /*__BITS_TYPES___FILE_H__*/
--- a/include/target/vhex-generic/bits/types/struct_FILE.h
+++ b/include/target/vhex-generic/bits/types/struct_FILE.h
@ -0,0 +1,26 @@
+#ifndef __BITS_TYPES_STRUCT_FILE_H__
+# define __BITS_TYPES_STRUCT_FILE_H__
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <sys/types.h>
+
+//---
+// TODO: VFS abstraction ? or ABI-spesific abstraction ?
+//---
+
+
+// Define _IO_FILE
+// TODO: add open flags
+// TODO: add file descriptor ?
+// TODO: update me !
+struct _IO_FILE
+{
+    off_t cursor;
+    int permission;
+    void *file_op;
+    void *private;
+};
+
+#endif /*__BITS_TYPES_STRUCT_FILE_H__*/
--- a/include/target/vhex-generic/bits/waitflags.h
+++ b/include/target/vhex-generic/bits/waitflags.h
@ -0,0 +1,9 @@
+#ifndef __BITS_WAITFLAGS_H__
+# define __BITS_WAITFLAGS_H__
+
+/* Bits in the third argument to `waitpid'. */
+#define	WNOHANG		1	/* Don't block waiting. */
+#define	WUNTRACED	2	/* Report status of stopped child. */
+#define	WCONTINUED	3	/* Report continued child. */
+
+#endif /*__BITS_WAITFLAGS_H__*/
--- a/include/target/vhex-generic/bits/waitstatus.h
+++ b/include/target/vhex-generic/bits/waitstatus.h
@ -0,0 +1,35 @@
+#ifndef __BITS_WAITSTATUS_H__
+# define __BITS_WAITSTATUS_H__
+
+/* If WIFEXITED(STATUS), the low-order 8 bits of the status. */
+#define	__WEXITSTATUS(status)	(((status) & 0xff00) >> 8)
+
+/* If WIFSIGNALED(STATUS), the terminating signal. */
+#define	__WTERMSIG(status)	((status) & 0x7f)
+
+/* If WIFSTOPPED(STATUS), the signal that stopped the child. */
+#define	__WSTOPSIG(status)	__WEXITSTATUS(status)
+
+/* Nonzero if STATUS indicates normal termination. */
+#define	__WIFEXITED(status)	(__WTERMSIG(status) == 0)
+
+/* Nonzero if STATUS indicates termination by a signal. */
+#define __WIFSIGNALED(status) \
+  (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)
+
+/* Nonzero if STATUS indicates the child is stopped.  */
+#define	__WIFSTOPPED(status)	(((status) & 0xff) == 0x7f)
+
+/* Nonzero if STATUS indicates the child continued after a stop. */
+# define __WIFCONTINUED(status)	((status) == __W_CONTINUED)
+
+/* Nonzero if STATUS indicates the child dumped core.  */
+#define	__WCOREDUMP(status)	((status) & __WCOREFLAG)
+
+/* Macros for constructing status values.  */
+#define	__W_EXITCODE(ret, sig)	((ret) << 8 | (sig))
+#define	__W_STOPCODE(sig)	((sig) << 8 | 0x7f)
+#define __W_CONTINUED		0xffff
+#define	__WCOREFLAG		0x80
+
+#endif /*__BITS_WAITSTATUS_H__*/
--- a/include/target/vhex/bits/signum.h
+++ b/include/target/vhex/bits/signum.h
@ -1,20 +0,0 @@
-#ifndef __BITS_SIGNUM_H__
-# define __BITS_SIGNUM_H__
-
-// Define the number of signals
-#define _NSIG		16
-
-/* Fake signal functions. */
-#define	SIG_ERR		((__sighandler_t) -1)	/* Error return. */
-#define	SIG_DFL		((__sighandler_t)  0)	/* Default action. */
-#define	SIG_IGN		((__sighandler_t)  1)	/* Ignore signal. */
-
-/* ISO C99 signals. */
-#define	SIGINT		2	/* Interactive attention signal. */
-#define	SIGILL		4	/* Illegal instruction. */
-#define	SIGABRT		6	/* Abnormal termination. */
-#define	SIGFPE		8	/* Erroneous arithmetic operation. */
-#define	SIGSEGV		11	/* Invalid access to storage. */
-#define	SIGTERM		15	/* Termination request. */
-
-#endif /*__BITS_SIGNUM_H__*/
--- a/include/target/vhex/bits/types/DIR.h
+++ b/include/target/vhex/bits/types/DIR.h
@ -1,12 +0,0 @@
-#ifndef __BITS_TYPES_DIR_H__
-# define __BITS_TYPES_DIR_H__
-
-#include <stddef.h>
-#include <stdint.h>
-
-typedef struct {
-	/* Associated directory descriptor */
-	int fd;
-} DIR;
-
-#endif /*__BITS_TYPES_DIR_H__*/
--- a/include/threads.h
+++ b/include/threads.h
@ -0,0 +1,85 @@
+#ifndef __THREADS_H__
+# define __THREADS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+//---
+// Warnig, this part is experimental and reserved for Vhex
+//---
+
+// Define Mutex type
+enum {
+	mtx_plain     = 0,
+	mtx_recursive = 1,
+	mtx_timed     = 2
+};
+
+// Define mutex structure
+// @note: This is a custom implementation
+#define MTX_WATERMARK	(0xdeadbeef)
+struct __mtx_s {
+	uint32_t __watermark;
+	uint16_t lock;
+	uint8_t type;
+};
+typedef struct __mtx_s mtx_t;
+
+
+//---
+// Mutex functions
+//---
+
+/*
+** Creates a new mutex object with type __TYPE.
+** @note: If successful the new object is pointed by __MUTEX.
+*/
+extern int mtx_init(mtx_t *__mutex, int __type);
+
+/*
+** Block the current thread until the mutex pointed to by __MUTEX is unlocked.
+** In that case current thread will not be blocked.
+*/
+extern int mtx_lock(mtx_t *__mutex);
+
+/*
+** Try to lock the mutex pointed by __MUTEX without blocking.
+** @note: If the mutex is free the current threads takes control of it,
+** otherwise it returns immediately.
+*/
+extern int mtx_trylock(mtx_t *__mutex);
+
+/*
+** Unlock the mutex pointed by __MUTEX.
+** @note: It may potentially awake other threads waiting on this mutex.
+*/
+extern int mtx_unlock (mtx_t *__mutex);
+
+/* Destroy the mutex object pointed by __MUTEX. */
+extern void mtx_destroy(mtx_t *__mutex);
+
+
+//---
+// Atomic operations
+//---
+/*
+** Save the current SR register and set the SR.BIT bit up (start atomic operations)
+** @note: return the saved SR register (if has been saved), 0xffffffff otherwise.
+*/
+extern uint32_t __thread_atomic_start(void);
+
+/*
+** Restore the saved SR register
+** @note: return the restored SR register or -1 otherwise.
+*/
+extern uint32_t __thread_atomic_stop(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__THREADS_H__*/
--- a/include/time.h
+++ b/include/time.h
@ -5,71 +5,28 @@
 extern "C" {
 #endif

-#include <stddef.h>
-#include <stdint.h>
-
-/* Number of ticks per second in a clock_t value. This is not necessarily the
-   full precision (eg. the RTC has only 128 units per second). */
+/* Number of ticks per second in a clock_t value. */
 #define CLOCKS_PER_SEC 1000000

-/* Represent process CPU time; unit is CLOCKS_PER_SEC. */
+/* Type used to represent process CPU time; unit is CLOCKS_PER_SEC. */
 typedef uint64_t clock_t;

-/* Represent a number of seconds since 1970-01-01 00:00:00 +0000 (UTC). */
-typedef int64_t time_t;
+/* Type used to represent a number of seconds since Epoch. */
+typedef uint64_t time_t;

 /* Broken-down time. */
 struct tm {
-	int tm_sec;     /* Seconds (0..60) */
-	int tm_min;     /* Minutes (0..59) */
-	int tm_hour;    /* Hours (0..23) */
-	int tm_mday;    /* Day of month (1..31) */
-	int tm_mon;     /* Month (0..11) */
-	int tm_year;    /* Years since 1900 */
-	int tm_wday;    /* Day of week, starting Sunday (0..6) */
-	int tm_yday;    /* Day of year (0..365) */
-	int tm_isdst;   /* Daylight Saving Time flag */
+	int tm_sec;
+	int tm_min;
+	int tm_hour;
+	int tm_mday;
+	int tm_mon;
+	int tm_year;
+	int tm_wday;
+	int tm_yday;
+	int tm_isdst;
 };

-/* Full time specification with second/nanosecond precision. */
-struct timespec {
-   time_t tv_sec;
-   long tv_nsec;
-};
-
-/* Returns CPU time used by the program (in number of CLOCKS_PER_SEC). */
-extern clock_t clock(void);
-
-/* Time elapsed between __start and __end, in seconds. */
-double difftime(time_t __end, time_t __start);
-
-/* Normalizes __time and returns associated timestamp.
-   TODO: Currently ignores the [tm_isdst] field. */
-extern time_t mktime(struct tm *__time);
-
-/* Determine current timestamp; also set it in __timeptr if non-NULL. */
-extern time_t time(time_t *__timeptr);
-
-/* Text representation, like "Sun Sep 16 01:03:52 1973\n". The returned string
-   is statically allocated and is overwritten by every call. */
-extern char *asctime(const struct tm *__time);
-
-/* Convert calendar time to asctime()'s text representation. */
-extern char *ctime(const time_t *__time);
-
-/* Convert calendar time to broken-down time as UTC. */
-extern struct tm *gmtime(const time_t *__time);
-
-/* Convert calendar time to broken-down local time.
-   TODO: We don't have timezones so this always returns UTC. */
-extern struct tm *localtime(const time_t *time);
-
-/* Formats __time according to the specified format; similar to snprintf().
-   TODO: %g, %G, %V (week-based year), and %U, %W (week number) are not
-         supported and substituted by "??". %z and %Z output nothing. */
-size_t strftime(char * __restrict__ __s, size_t __maxsize,
-	const char * __restrict__ __format, const struct tm * __restrict__ __time);
-
 #ifdef __cplusplus
 }
 #endif
--- a/include/unistd.h
+++ b/include/unistd.h
@ -5,57 +5,11 @@
 extern "C" {
 #endif

-#include <stdio.h>
+#include <stddef.h>
 #include <stdint.h>
+
 #include <sys/types.h>

-/* Standard file descriptors. */
-#define STDIN_FILENO    0
-#define STDOUT_FILENO   1
-#define STDERR_FILENO   2
-
-/* Write data to a file descriptor; returns number of bytes written or -1. */
-extern ssize_t write(int __fd, const void *__buf, size_t __nbytes);
-
-/* Read data from a file descriptor; returns number of bytes read or -1. */
-extern ssize_t read(int __fd, void *__buf, size_t __nbytes);
-
-/* Read at a specific position from a file descriptor. */
-extern ssize_t pread(int __fd, void *__buf, size_t __nbytes, off_t __offset);
-
-/* Write at a specific position to a file descriptor. */
-extern ssize_t pwrite(int __fd, const void *__buf, size_t __n, off_t __offset);
-
-/* Seek at an offset from SEEK_SET/SEEK_CUR/SEEK_END; returns new position. */
-extern off_t lseek(int __fd, off_t __offset, int __whence);
-
-/* Close a file descriptor. */
-extern int close(int __fd);
-
-/* Remove a file. */
-extern int unlink(const char *__path);
-
-/* Create a directory. */
-extern int mkdir(const char *__path, mode_t __mode);
-
-/* Remove an empty directory. */
-extern int rmdir(const char *__path);
-
-extern char *getcwd(char *__buf, size_t __size);
-
-extern int chdir(char const *__path);
-
-extern int isatty(int __fd);
-
-extern int dup(int __fd);
-
-/* Exit immediately, bypassing exit handlers or signal handlers. */
-__attribute__((noreturn))
-extern void _exit(int __status);
-
-
-/* Kernel-style functions supported only by Vhex. */
-
 //---
 // Process part
 ///---
@ -75,6 +29,51 @@ extern pid_t getppid(void);
 */
 extern int setpgid(pid_t __pid, pid_t __pgid);

+//---
+// File part
+//---
+/* Standard file descriptors. */
+#define STDIN_FILENO	0	/* Standard input. */
+#define STDOUT_FILENO	1	/* Standard output. */
+#define STDERR_FILENO	2	/* Standard error output. */
+
+/*
+** Write N bytes of BUF to FD.
+** Return the number written, or -1.
+*/
+extern ssize_t write(int __fd, const void *__buf, size_t __nbytes);
+
+/*
+** Read NBYTES into BUF from FD.
+** Return the number read, -1 for errors or 0 for EOF.
+*/
+extern ssize_t read(int __fd, void *__buf, size_t __nbytes);
+
+/*
+** Read NBYTES into BUF from FD at the given position OFFSET without
+** changing the file pointer.
+** Return the number read, -1 for errors or 0 for EOF.
+*/
+extern ssize_t pread (int __fd, void *__buf, size_t __nbytes, off_t __offset);
+
+/*
+** Write N bytes of BUF to FD at the given position OFFSET without
+** changing the file pointer.
+** Return the number written, or -1.
+*/
+extern ssize_t pwrite (int __fd, const void *__buf, size_t __n, off_t __offset);
+
+/*
+** Move FD's file position to OFFSET bytes from the beginning of the file
+** (if WHENCE is SEEK_SET), the current position (if WHENCE is SEEK_CUR),
+** or the end of the file (if WHENCE is SEEK_END).
+** Return the new file position.
+*/
+extern off_t lseek (int __fd, off_t __offset, int __whence);
+
+/* Close the file descriptor FD */
+extern int close(int __fd);
+
 //---
 // System part
 //---
--- a/src/dso.c
+++ b/src/dso.c
@ -1,68 +0,0 @@
-#include <stdlib.h>
-
-/* We don't support shared object loading, so provide a single handle */
-__attribute__((visibility("hidden")))
-void *__dso_handle = (void *)&__dso_handle;
-
-/* Number of atexit() calls supported, must be at least 32 (7.20.4.2§3).*/
-#define ATEXIT_MAX 32
-
-struct dtor {
-	void (*f)(void *);
-	void *p;
-	void *d;
-};
-
-static struct dtor *_dtors;
-static int _dtor_count = 0;
-
-__attribute__((constructor))
-static void alloc_dtors(void)
-{
-	_dtors = malloc(ATEXIT_MAX * sizeof *_dtors);
-}
-
-int __cxa_atexit(void (*f)(void *), void *p, void *d)
-{
-	if(!_dtors || _dtor_count >= ATEXIT_MAX)
-		return 1;
-	_dtors[_dtor_count++] = (struct dtor){ f, p, d };
-	return 0;
-}
-
-/* We walk the destructor list in reverse order. Destructors may themselves
-   call __cxa_atexit(), causing new destructors to be added. When that
-   happens, we must call the new ones first before resuming (7.20.4.3§3). We
-   track changes in _dtor_count to detect this situation.
-
-   This function calls destructs in the interval [low..high) that match DSO
-   handle d, plus any other destructors registered as a consequence.
-   _dtor_count may increase. */
-static void call_dtors_in_interval(void *d, int low, int high)
-{
-	int end = _dtor_count;
-
-	for(int i = high - 1; i >= low; i--) {
-		if(d == NULL || _dtors[i].d == d)
-			_dtors[i].f(_dtors[i].p);
-
-		if(_dtor_count > end) {
-			call_dtors_in_interval(d, end, _dtor_count);
-			end = _dtor_count;
-		}
-	}
-}
-
-void __cxa_finalize(void *d)
-{
-	call_dtors_in_interval(d, 0, _dtor_count);
-
-	/* Re-compact the array to keep only destructors we didn't call. */
-	int j = 0;
-	for(int i = 0; i < _dtor_count; i++) {
-		if(d == NULL || _dtors[i].d == d)
-			continue;
-		_dtors[j++] = _dtors[i];
-	}
-	_dtor_count = j;
-}
--- a/src/libc/assert/assert.c
+++ b/src/libc/assert/assert.c
--- a/src/libc/ctype/isalnum.c
+++ b/src/libc/ctype/isalnum.c
--- a/src/libc/ctype/isalpha.c
+++ b/src/libc/ctype/isalpha.c
--- a/src/libc/ctype/isblank.c
+++ b/src/libc/ctype/isblank.c
--- a/src/libc/ctype/iscntrl.c
+++ b/src/libc/ctype/iscntrl.c
--- a/src/libc/ctype/isdigit.c
+++ b/src/libc/ctype/isdigit.c
--- a/src/libc/ctype/isgraph.c
+++ b/src/libc/ctype/isgraph.c
--- a/src/libc/ctype/islower.c
+++ b/src/libc/ctype/islower.c
--- a/src/libc/ctype/isprint.c
+++ b/src/libc/ctype/isprint.c
--- a/src/libc/ctype/ispunct.c
+++ b/src/libc/ctype/ispunct.c
--- a/src/libc/ctype/isspace.c
+++ b/src/libc/ctype/isspace.c
--- a/src/libc/ctype/isupper.c
+++ b/src/libc/ctype/isupper.c
--- a/src/libc/ctype/isxdigit.c
+++ b/src/libc/ctype/isxdigit.c
--- a/src/libc/ctype/tolower.c
+++ b/src/libc/ctype/tolower.c
--- a/src/libc/ctype/toupper.c
+++ b/src/libc/ctype/toupper.c
--- a/src/libc/errno/errno.c
+++ b/src/libc/errno/errno.c
--- a/src/libc/inttypes/imaxabs.c
+++ b/src/libc/inttypes/imaxabs.c
--- a/src/libc/inttypes/imaxdiv.c
+++ b/src/libc/inttypes/imaxdiv.c
--- a/src/libc/inttypes/strtoimax.c
+++ b/src/libc/inttypes/strtoimax.c
--- a/src/libc/inttypes/strtoumax.c
+++ b/src/libc/inttypes/strtoumax.c
--- a/src/libc/locale/localeconv.c
+++ b/src/libc/locale/localeconv.c
--- a/src/libc/locale/setlocale.c
+++ b/src/libc/locale/setlocale.c
--- a/src/libc/setjmp/target/sh-generic/longjmp.S
+++ b/src/libc/setjmp/target/sh-generic/longjmp.S
--- a/src/libc/setjmp/target/sh-generic/setjmp.S
+++ b/src/libc/setjmp/target/sh-generic/setjmp.S
--- a/src/libc/signal/raise.c
+++ b/src/libc/signal/raise.c
@ -3,6 +3,8 @@
 #include <stdlib.h>
 #include "signal_p.h"

+#ifndef __SUPPORT_VHEX_KERNEL
+
 int raise(int sig)
 {
 	if(sig < 0 || sig >= _NSIG)
@ -29,3 +31,5 @@ int raise(int sig)
 	signal(sig, handler);
 	return 0;
 }
+
+#endif /*! __SUPPORT_VHEX_KERNEL*/
--- a/src/libc/signal/signal.c
+++ b/src/libc/signal/signal.c
--- a/src/libc/signal/signal_p.h
+++ b/src/libc/signal/signal_p.h
--- a/src/libc/signal/target/vhex-sh/kill.S
+++ b/src/libc/signal/target/vhex-sh/kill.S
@ -0,0 +1,18 @@
+#include <bits/asm/unistd_32.h>
+.text
+.global	_kill
+.type	_kill, @function
+
+
+.align 2
+/*
+** extern int kill(pid_t pid, int sig);
+** Send signal SIG to process number PID.  If PID is zero, send SIG to all
+** processes in the current process's process group. If PID is < -1, send SIG to
+** all processes in process group - PID.
+*/
+_kill:
+	trapa	#__NR_kill
+	rts
+	nop
+.end
--- a/src/libc/signal/target/vhex-sh/signal.S
+++ b/src/libc/signal/target/vhex-sh/signal.S
@ -0,0 +1,17 @@
+#include <bits/asm/unistd_32.h>
+.text
+.global	_signal
+.type	_signal, @function
+
+
+.align 2
+/*
+** extern void (*signal(int signum, void (*handler)(int)))(int);
+** Set the handler for the signal SIG to HANDLER, returning the old handler, or
+** SIG_ERR on error. By default `signal' has the BSD semantic.
+*/
+_signal:
+	trapa	#__NR_signal
+	rts
+	nop
+.end
--- a/src/libc/stdio/asprintf.c
+++ b/src/libc/stdio/asprintf.c
--- a/src/libc/stdio/dprintf.c
+++ b/src/libc/stdio/dprintf.c
--- a/src/libc/stdio/fprintf.c
+++ b/src/libc/stdio/fprintf.c
--- a/src/libc/stdio/printf.c
+++ b/src/libc/stdio/printf.c
--- a/src/libc/stdio/printf/format_fixed.c
+++ b/src/libc/stdio/printf/format_fixed.c
--- a/src/libc/stdio/printf/format_fp.c
+++ b/src/libc/stdio/printf/format_fp.c
@ -1,6 +1,6 @@
 #include <stddef.h>
 #include <fxlibc/printf.h>
-#include "../../../3rdparty/grisu2b_59_56/grisu2.h"
+#include "../../../../3rdparty/grisu2b_59_56/grisu2.h"

 #define min(x, y) ({ \
 	__auto_type _x = (x); \
--- a/src/libc/stdio/printf/format_usual.c
+++ b/src/libc/stdio/printf/format_usual.c
@ -19,27 +19,7 @@ void __printf_format_c(
 	__printf_compute_geometry(opt, &g);

 	__printf_outn(out, ' ', g.left_spaces);
-
-	/* When using %lc, output as UTF-8 */
-	if(opt->size != 4 || c <= 0x7f) {
 	__printf_out(out, c);
-	}
-	else if(c <= 0x7ff) {
-		__printf_out(out, 0xc0 | (c >> 6));
-		__printf_out(out, 0x80 | (c & 0x3f));
-	}
-	else if(c <= 0xffff) {
-		__printf_out(out, 0xe0 | (c >> 12));
-		__printf_out(out, 0x80 | ((c >> 6) & 0x3f));
-		__printf_out(out, 0x80 | (c & 0x3f));
-	}
-	else {
-		__printf_out(out, 0xf0 | (c >> 18));
-		__printf_out(out, 0x80 | ((c >> 12) & 0x3f));
-		__printf_out(out, 0x80 | ((c >> 6) & 0x3f));
-		__printf_out(out, 0x80 | (c & 0x3f));
-	}
-
 	__printf_outn(out, ' ', g.right_spaces);
 }

@ -59,8 +39,6 @@ void __printf_format_s(
 	size_t len = 0;
 	uint32_t precision = opt->precision ? opt->precision : (-1);
 	while(s[len] && len < precision) len++;
-	/* Cap precision to real value for __printf_compute_geometry() */
-	opt->precision = len;

 	struct __printf_geometry g = {
 		.prefix = 0, .sign = 0, .content = len,
--- a/src/libc/stdio/printf/print.c
+++ b/src/libc/stdio/printf/print.c
@ -2,7 +2,6 @@
 #include <ctype.h>
 #include <stdint.h>
 #include <string.h>
-#include <unistd.h>
 #include <fxlibc/printf.h>

 /* Internal buffer, used when no buffer is specified for output */
@ -107,12 +106,12 @@ void __printf_flush(struct __printf_output *out)
 	/* File pointer: output with fwrite */
 	else if(out->fp)
 	{
-		fwrite(out->buffer, 1, out->ptr - out->buffer, out->fp);
+		// fwrite(out->buffer, out->ptr - out->buffer, 1, out->fp);
 	}
 	/* File pointer: output with write */
 	else if(out->fd)
 	{
-		write(out->fd, out->buffer, out->ptr - out->buffer);
+		// write(fd, out->buffer, out->ptr - out->buffer);
 	}

 	/* Switch to the internal buffer (when writing to a string that string
@ -125,8 +124,8 @@ void __printf_flush(struct __printf_output *out)
 /* Parse format strings. */
 static struct __printf_format parse_fmt(char const * restrict *options_ptr)
 {
-	/* No options enabled by default; default size is set at the end */
-	struct __printf_format opt = { .size = 0, .precision = -1 };
+	/* No options enabled by default, set the size to int */
+	struct __printf_format opt = { .size = sizeof(int), .precision = -1 };

 	/* This function acts as a deterministic finite automaton */
 	enum {
@ -252,10 +251,6 @@ int __printf(
 		opt = parse_fmt(&format);
 		opt.spec = *format++;

-		/* Set default size to 1 for %c, 4 otherwise */
-		if(opt.size == 0)
-			opt.size = (opt.spec == 'c') ? 1 : 4;
-
 		int id;
 		if(isupper(opt.spec))
 			id = opt.spec - 'A';
--- a/src/libc/stdio/printf/util.c
+++ b/src/libc/stdio/printf/util.c
--- a/src/libc/stdio/putc.c
+++ b/src/libc/stdio/putc.c
@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int putchar(int c)
+{
+	char n;
+
+	n = (char)c;
+	write(STDOUT_FILENO, &n, 1);
+	return (n);
+}
--- a/src/libc/stdio/puts.c
+++ b/src/libc/stdio/puts.c
@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+** puts() writes the string s and a trailing newline to stdout.
+** FIXME: check last write error !
+*/
+int puts(const char *s)
+{
+	size_t size;
+	size_t n;
+
+	size = strlen(s);
+	n = write(STDOUT_FILENO, s, size);
+	write(STDOUT_FILENO, "\n", 1);
+	return (-(n == size));
+}
--- a/src/libc/stdio/snprintf.c
+++ b/src/libc/stdio/snprintf.c
--- a/src/libc/stdio/sprintf.c
+++ b/src/libc/stdio/sprintf.c
--- a/src/libc/stdio/vasprintf.c
+++ b/src/libc/stdio/vasprintf.c
--- a/src/libc/stdio/vdprintf.c
+++ b/src/libc/stdio/vdprintf.c
--- a/src/libc/stdio/vfprintf.c
+++ b/src/libc/stdio/vfprintf.c
--- a/src/libc/stdio/vprintf.c
+++ b/src/libc/stdio/vprintf.c
--- a/src/libc/stdio/vsnprintf.c
+++ b/src/libc/stdio/vsnprintf.c
--- a/src/libc/stdio/vsprintf.c
+++ b/src/libc/stdio/vsprintf.c
--- a/src/libc/stdlib/abort.c
+++ b/src/libc/stdlib/abort.c
--- a/src/libc/stdlib/abs.c
+++ b/src/libc/stdlib/abs.c
--- a/src/libc/stdlib/atof.c
+++ b/src/libc/stdlib/atof.c
--- a/Show more
+++ b/Show more