diff --git a/config/common.mk b/config/common.mk index 4247dcf6..ecb4fd92 100644 --- a/config/common.mk +++ b/config/common.mk @@ -49,13 +49,18 @@ endif ATMOSPHERE_DEFINES += -DATMOSPHERE_GIT_BRANCH=\"$(ATMOSPHERE_GIT_BRANCH)\" -DATMOSPHERE_GIT_REVISION=\"$(ATMOSPHERE_GIT_REVISION)\" +#--------------------------------------------------------------------------------- +# Ensure top directory is set. +#--------------------------------------------------------------------------------- +export TOPDIR ?= $(CURDIR) + #--------------------------------------------------------------------------------- # TARGET is the name of the output # SOURCES is a list of directories containing source code # DATA is a list of directories containing data files # INCLUDES is a list of directories containing header files #--------------------------------------------------------------------------------- -export TARGET := $(notdir $(CURDIR)) +export TARGET ?= $(notdir $(CURDIR)) export BUILD := build export DATA := data export INCLUDES := include diff --git a/config/templates/mesosphere.mk b/config/templates/mesosphere.mk new file mode 100644 index 00000000..abe2fc07 --- /dev/null +++ b/config/templates/mesosphere.mk @@ -0,0 +1,39 @@ +#--------------------------------------------------------------------------------- +# pull in common atmosphere configuration +#--------------------------------------------------------------------------------- +include $(dir $(abspath $(lastword $(MAKEFILE_LIST))))/../common.mk + +#--------------------------------------------------------------------------------- +# options for code generation +#--------------------------------------------------------------------------------- +export DEFINES := $(ATMOSPHERE_DEFINES) -DATMOSPHERE_IS_MESOSPHERE +export SETTINGS := $(ATMOSPHERE_SETTINGS) -O2 -mgeneral-regs-only -Werror +export CFLAGS := $(ATMOSPHERE_CFLAGS) $(SETTINGS) $(DEFINES) $(INCLUDE) +export CXXFLAGS := $(CFLAGS) $(ATMOSPHERE_CXXFLAGS) +export ASFLAGS := $(ATMOSPHERE_ASFLAGS) $(SETTINGS) + +export LDFLAGS = -specs=$(TOPDIR)/kernel_ldr.specs -nostdlib -nostartfiles -g $(SETTINGS) -Wl,-Map,$(notdir $*.map) + +export CXXWRAPS := -Wl,--wrap,__cxa_pure_virtual \ + -Wl,--wrap,__cxa_throw \ + -Wl,--wrap,__cxa_rethrow \ + -Wl,--wrap,__cxa_allocate_exception \ + -Wl,--wrap,__cxa_free_exception \ + -Wl,--wrap,__cxa_begin_catch \ + -Wl,--wrap,__cxa_end_catch \ + -Wl,--wrap,__cxa_call_unexpected \ + -Wl,--wrap,__cxa_call_terminate \ + -Wl,--wrap,__gxx_personality_v0 \ + -Wl,--wrap,_Unwind_Resume \ + -Wl,--wrap,_Unwind_Resume \ + -Wl,--wrap,_ZSt19__throw_logic_errorPKc \ + -Wl,--wrap,_ZSt20__throw_length_errorPKc \ + -Wl,--wrap,_ZNSt11logic_errorC2EPKc + +export LIBS := -lmesosphere + +#--------------------------------------------------------------------------------- +# list of directories containing libraries, this must be the top level containing +# include and lib +#--------------------------------------------------------------------------------- +LIBDIRS := $(ATMOSPHERE_LIBRARIES_DIR)/libvapours $(ATMOSPHERE_LIBRARIES_DIR)/libmesosphere diff --git a/libmesosphere/source/libc/kern_libc.c b/libmesosphere/source/libc/kern_libc.c new file mode 100644 index 00000000..06ae0769 --- /dev/null +++ b/libmesosphere/source/libc/kern_libc.c @@ -0,0 +1,422 @@ +/* + * Copyright (c) 2018-2019 Atmosphère-NX + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include + +/* Note: copied from newlib */ +#ifdef __cplusplus +extern "C" { +#endif + +/* +FUNCTION + <>---move possibly overlapping memory +INDEX + memmove +SYNOPSIS + #include + void *memmove(void *<[dst]>, const void *<[src]>, size_t <[length]>); +DESCRIPTION + This function moves <[length]> characters from the block of + memory starting at <<*<[src]>>> to the memory starting at + <<*<[dst]>>>. <> reproduces the characters correctly + at <<*<[dst]>>> even if the two areas overlap. +RETURNS + The function returns <[dst]> as passed. +PORTABILITY +<> is ANSI C. +<> requires no supporting OS subroutines. +QUICKREF + memmove ansi pure +*/ + +/* Nonzero if either X or Y is not aligned on a "long" boundary. */ +#define UNALIGNED(X, Y) \ + (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1))) + +/* How many bytes are copied each iteration of the 4X unrolled loop. */ +#define BIGBLOCKSIZE (sizeof (long) << 2) + +/* How many bytes are copied each iteration of the word copy loop. */ +#define LITTLEBLOCKSIZE (sizeof (long)) + +/* Threshhold for punting to the byte copier. */ +#undef TOO_SMALL +#define TOO_SMALL(LEN) ((LEN) < BIGBLOCKSIZE) + +/*SUPPRESS 20*/ +void * +//__inhibit_loop_to_libcall +memmove (void *dst_void, + const void *src_void, + size_t length) +{ +#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) + char *dst = dst_void; + const char *src = src_void; + + if (src < dst && dst < src + length) + { + /* Have to copy backwards */ + src += length; + dst += length; + while (length--) + { + *--dst = *--src; + } + } + else + { + while (length--) + { + *dst++ = *src++; + } + } + + return dst_void; +#else + char *dst = dst_void; + const char *src = src_void; + long *aligned_dst; + const long *aligned_src; + + if (src < dst && dst < src + length) + { + /* Destructive overlap...have to copy backwards */ + src += length; + dst += length; + while (length--) + { + *--dst = *--src; + } + } + else + { + /* Use optimizing algorithm for a non-destructive copy to closely + match memcpy. If the size is small or either SRC or DST is unaligned, + then punt into the byte copy loop. This should be rare. */ + if (!TOO_SMALL(length) && !UNALIGNED (src, dst)) + { + aligned_dst = (long*)dst; + aligned_src = (long*)src; + + /* Copy 4X long words at a time if possible. */ + while (length >= BIGBLOCKSIZE) + { + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + length -= BIGBLOCKSIZE; + } + + /* Copy one long word at a time if possible. */ + while (length >= LITTLEBLOCKSIZE) + { + *aligned_dst++ = *aligned_src++; + length -= LITTLEBLOCKSIZE; + } + + /* Pick up any residual with a byte copier. */ + dst = (char*)aligned_dst; + src = (char*)aligned_src; + } + + while (length--) + { + *dst++ = *src++; + } + } + + return dst_void; +#endif /* not PREFER_SIZE_OVER_SPEED */ +} + +/* +FUNCTION + <>---copy memory regions +SYNOPSIS + #include + void* memcpy(void *restrict <[out]>, const void *restrict <[in]>, + size_t <[n]>); +DESCRIPTION + This function copies <[n]> bytes from the memory region + pointed to by <[in]> to the memory region pointed to by + <[out]>. + If the regions overlap, the behavior is undefined. +RETURNS + <> returns a pointer to the first byte of the <[out]> + region. +PORTABILITY +<> is ANSI C. +<> requires no supporting OS subroutines. +QUICKREF + memcpy ansi pure + */ + +void * +memcpy (void * dst0, + const void * __restrict src0, + size_t len0) +{ +#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) + char *dst = (char *) dst0; + char *src = (char *) src0; + + void *save = dst0; + + while (len0--) + { + *dst++ = *src++; + } + + return save; +#else + char *dst = dst0; + const char *src = src0; + long *aligned_dst; + const long *aligned_src; + + /* If the size is small, or either SRC or DST is unaligned, + then punt into the byte copy loop. This should be rare. */ + if (!TOO_SMALL(len0) && !UNALIGNED (src, dst)) + { + aligned_dst = (long*)dst; + aligned_src = (long*)src; + + /* Copy 4X long words at a time if possible. */ + while (len0 >= BIGBLOCKSIZE) + { + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + *aligned_dst++ = *aligned_src++; + len0 -= BIGBLOCKSIZE; + } + + /* Copy one long word at a time if possible. */ + while (len0 >= LITTLEBLOCKSIZE) + { + *aligned_dst++ = *aligned_src++; + len0 -= LITTLEBLOCKSIZE; + } + + /* Pick up any residual with a byte copier. */ + dst = (char*)aligned_dst; + src = (char*)aligned_src; + } + + while (len0--) + *dst++ = *src++; + + return dst0; +#endif /* not PREFER_SIZE_OVER_SPEED */ +} + +/* +FUNCTION + <>---set an area of memory +INDEX + memset +SYNOPSIS + #include + void *memset(void *<[dst]>, int <[c]>, size_t <[length]>); +DESCRIPTION + This function converts the argument <[c]> into an unsigned + char and fills the first <[length]> characters of the array + pointed to by <[dst]> to the value. +RETURNS + <> returns the value of <[dst]>. +PORTABILITY +<> is ANSI C. + <> requires no supporting OS subroutines. +QUICKREF + memset ansi pure +*/ + +#include + +#undef LBLOCKSIZE +#undef UNALIGNED +#undef TOO_SMALL + +#define LBLOCKSIZE (sizeof(long)) +#define UNALIGNED(X) ((long)X & (LBLOCKSIZE - 1)) +#define TOO_SMALL(LEN) ((LEN) < LBLOCKSIZE) + +void * +memset (void *m, + int c, + size_t n) +{ + char *s = (char *) m; + +#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__) + unsigned int i; + unsigned long buffer; + unsigned long *aligned_addr; + unsigned int d = c & 0xff; /* To avoid sign extension, copy C to an + unsigned variable. */ + + while (UNALIGNED (s)) + { + if (n--) + *s++ = (char) c; + else + return m; + } + + if (!TOO_SMALL (n)) + { + /* If we get this far, we know that n is large and s is word-aligned. */ + aligned_addr = (unsigned long *) s; + + /* Store D into each char sized location in BUFFER so that + we can set large blocks quickly. */ + buffer = (d << 8) | d; + buffer |= (buffer << 16); + for (i = 32; i < LBLOCKSIZE * 8; i <<= 1) + buffer = (buffer << i) | buffer; + + /* Unroll the loop. */ + while (n >= LBLOCKSIZE*4) + { + *aligned_addr++ = buffer; + *aligned_addr++ = buffer; + *aligned_addr++ = buffer; + *aligned_addr++ = buffer; + n -= 4*LBLOCKSIZE; + } + + while (n >= LBLOCKSIZE) + { + *aligned_addr++ = buffer; + n -= LBLOCKSIZE; + } + /* Pick up the remainder with a bytewise loop. */ + s = (char*)aligned_addr; + } + +#endif /* not PREFER_SIZE_OVER_SPEED */ + + while (n--) + *s++ = (char) c; + + return m; +} + +/* +FUNCTION + <>---compare two memory areas +INDEX + memcmp +SYNOPSIS + #include + int memcmp(const void *<[s1]>, const void *<[s2]>, size_t <[n]>); +DESCRIPTION + This function compares not more than <[n]> characters of the + object pointed to by <[s1]> with the object pointed to by <[s2]>. +RETURNS + The function returns an integer greater than, equal to or + less than zero according to whether the object pointed to by + <[s1]> is greater than, equal to or less than the object + pointed to by <[s2]>. +PORTABILITY +<> is ANSI C. +<> requires no supporting OS subroutines. +QUICKREF + memcmp ansi pure +*/ + +#undef LBLOCKSIZE +#undef UNALIGNED +#undef TOO_SMALL + +/* Nonzero if either X or Y is not aligned on a "long" boundary. */ +#define UNALIGNED(X, Y) \ + (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1))) + +/* How many bytes are copied each iteration of the word copy loop. */ +#define LBLOCKSIZE (sizeof (long)) + +/* Threshhold for punting to the byte copier. */ +#define TOO_SMALL(LEN) ((LEN) < LBLOCKSIZE) + +int +memcmp (const void *m1, + const void *m2, + size_t n) +{ +#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) + unsigned char *s1 = (unsigned char *) m1; + unsigned char *s2 = (unsigned char *) m2; + + while (n--) + { + if (*s1 != *s2) + { + return *s1 - *s2; + } + s1++; + s2++; + } + return 0; +#else + unsigned char *s1 = (unsigned char *) m1; + unsigned char *s2 = (unsigned char *) m2; + unsigned long *a1; + unsigned long *a2; + + /* If the size is too small, or either pointer is unaligned, + then we punt to the byte compare loop. Hopefully this will + not turn up in inner loops. */ + if (!TOO_SMALL(n) && !UNALIGNED(s1,s2)) + { + /* Otherwise, load and compare the blocks of memory one + word at a time. */ + a1 = (unsigned long*) s1; + a2 = (unsigned long*) s2; + while (n >= LBLOCKSIZE) + { + if (*a1 != *a2) + break; + a1++; + a2++; + n -= LBLOCKSIZE; + } + + /* check m mod LBLOCKSIZE remaining characters */ + + s1 = (unsigned char*)a1; + s2 = (unsigned char*)a2; + } + + while (n--) + { + if (*s1 != *s2) + return *s1 - *s2; + s1++; + s2++; + } + + return 0; +#endif /* not PREFER_SIZE_OVER_SPEED */ +} + +#ifdef __cplusplus +} /* extern "C" */ +#endif