8000 Added bare minimum files necessary to build micromusl · micropython/micropython@69b723e · GitHub
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Hagen Kaye
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Added bare minimum files necessary to build micromusl
These are the files necessary to build libc.a before any functionality is added. To build micromusl, in this directory type: export CROSS_COMPILE=arm-none-eabi- ./configure --disable-shared --prefix=build make make install installs in 'build' directory
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‎micromusl/.gitignore

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*.o
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*.lo
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*.a
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*.so
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*.so.1
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arch/*/bits/alltypes.h
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config.mak
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include/bits
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tools/musl-gcc
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lib/musl-gcc.specs
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build

‎micromusl/Makefile

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#
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# Makefile for musl (requires GNU make)
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#
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# This is how simple every makefile should be...
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# No, I take that back - actually most should be less than half this size.
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#
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# Use config.mak to override any of the following variables.
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# Do not make changes here.
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#
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exec_prefix = /usr/local
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bindir = $(exec_prefix)/bin
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prefix = /usr/local/musl
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includedir = $(prefix)/include
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libdir = $(prefix)/lib
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syslibdir = /lib
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SRCS = $(sort $(wildcard src/*/*.c arch/$(ARCH)/src/*.c))
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OBJS = $(SRCS:.c=.o)
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LOBJS = $(OBJS:.o=.lo)
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GENH = include/bits/alltypes.h
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GENH_INT = src/internal/version.h
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IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h
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LDFLAGS =
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LIBCC = -lgcc
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CPPFLAGS =
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CFLAGS = -Os -pipe
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CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
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CFLAGS_ALL = $(CFLAGS_C99FSE)
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CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
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CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS)
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CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
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CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED
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AR = $(CROSS_COMPILE)ar
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RANLIB = $(CROSS_COMPILE)ranlib
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INSTALL = ./tools/install.sh
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ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
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ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))
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EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
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EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
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CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
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STATIC_LIBS = lib/libc.a
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SHARED_LIBS = lib/libc.so
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TOOL_LIBS = lib/musl-gcc.specs
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ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
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ALL_TOOLS = tools/musl-gcc
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LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
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-include config.mak
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all: $(ALL_LIBS) $(ALL_TOOLS)
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install: install-libs install-headers install-tools
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clean:
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rm -f crt/*.o
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rm -f $(OBJS)
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rm -f $(LOBJS)
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rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
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rm -f $(ALL_TOOLS)
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rm -f $(GENH) $(GENH_INT)
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rm -f include/bits
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distclean: clean
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rm -f config.mak
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include/bits:
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@test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
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ln -sf ../arch/$(ARCH)/bits $@
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include/bits/alltypes.h.in: include/bits
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include/bits/alltypes.h: include/bits/alltypes.h.in include/alltypes.h.in tools/mkalltypes.sed
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sed -f tools/mkalltypes.sed include/bits/alltypes.h.in include/alltypes.h.in > $@
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src/internal/version.h: $(wildcard F438 VERSION .git)
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printf '#define VERSION "%s"\n' "$$(sh tools/version.sh)" > $@
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src/internal/version.lo: src/internal/version.h
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src/ldso/dynlink.lo: arch/$(ARCH)/reloc.h
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crt/crt1.o crt/Scrt1.o: $(wildcard arch/$(ARCH)/crt_arch.h)
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crt/Scrt1.o: CFLAGS += -fPIC
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OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
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$(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
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MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
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$(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)
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# This incantation ensures that changes to any subarch asm files will
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# force the corresponding object file to be rebuilt, even if the implicit
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# rule below goes indirectly through a .sub file.
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define mkasmdep
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$(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
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endef
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$(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
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%.o: $(ARCH)$(ASMSUBARCH)/%.sub
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)
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%.o: $(ARCH)/%.s
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
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%.o: %.c $(GENH) $(IMPH)
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
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%.lo: $(ARCH)$(ASMSUBARCH)/%.sub
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)
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%.lo: $(ARCH)/%.s
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
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%.lo: %.c $(GENH) $(IMPH)
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
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lib/libc.so: $(LOBJS)
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$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
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-Wl,-e,_start -Wl,-Bsymbolic-functions \
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-o $@ $(LOBJS) $(LIBCC)
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lib/libc.a: $(OBJS)
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rm -f $@
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$(AR) rc $@ $(OBJS)
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$(RANLIB) $@
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$(EMPTY_LIBS):
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rm -f $@
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$(AR) rc $@
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lib/%.o: crt/%.o
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cp $< $@
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lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
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sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
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tools/musl-gcc: config.mak
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printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
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chmod +x $@
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$(DESTDIR)$(bindir)/%: tools/%
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$(INSTALL) -D $< $@
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$(DESTDIR)$(libdir)/%.so: lib/%.so
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$(INSTALL) -D -m 755 $< $@
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$(DESTDIR)$(libdir)/%: lib/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(includedir)/%: include/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
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$(INSTALL) -D -l $(libdir)/libc.so $@ || true
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install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
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install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
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install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
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.PRECIOUS: $(CRT_LIBS:lib/%=crt/%)
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.PHONY: all clean install install-libs install-headers install-tools

‎micromusl/arch/arm/atomic.h

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#ifndef _INTERNAL_ATOMIC_H
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#define _INTERNAL_ATOMIC_H
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#include <stdint.h>
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static inline int a_ctz_l(unsigned long x)
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{
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static const char debruijn32[32] = {
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0, 1, 23, 2, 29, 24, 19, 3, 30, 27, 25, 11, 20, 8, 4, 13,
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31, 22, 28, 18, 26, 10, 7, 12, 21, 17, 9, 6, 16, 5, 15, 14
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};
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return debruijn32[(x&-x)*0x076be629 >> 27];
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}
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static inline int a_ctz_64(uint64_t x)
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{
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uint32_t y = x;
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if (!y) {
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y = x>>32;
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return 32 + a_ctz_l(y);
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}
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return a_ctz_l(y);
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}
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#define __k_cas ((int (*)(int, int, volatile int *))0xffff0fc0)
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static inline int a_cas(volatile int *p, int t, int s)
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{
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int old;
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for (;;) {
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if (!__k_cas(t, s, p))
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return t;
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if ((old=*p) != t)
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return old;
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}
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}
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static inline void *a_cas_p(volatile void *p, void *t, void *s)
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{
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return (void *)a_cas(p, (int)t, (int)s);
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}
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static inline long a_cas_l(volatile void *p, long t, long s)
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{
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return a_cas(p, t, s);
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}
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static inline int a_swap(volatile int *x, int v)
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{
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int old;
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do old = *x;
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while (__k_cas(old, v, x));
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return old;
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}
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static inline int a_fetch_add(volatile int *x, int v)
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{
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int old;
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do old = *x;
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while (__k_cas(old, old+v, x));
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return old;
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}
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static inline void a_inc(volatile int *x)
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{
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a_fetch_add(x, 1);
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}
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static inline void a_dec(volatile int *x)
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{
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a_fetch_add(x, -1);
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}
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static inline void a_store(volatile int *p, int x)
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{
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while (__k_cas(*p, x, p));
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}
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static inline void a_spin()
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{
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}
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static inline void a_crash()
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{
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*(volatile char *)0=0;
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}
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static inline void a_and(volatile int *p, int v)
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{
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int old;
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do old = *p;
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while (__k_cas(old, old&v, p));
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}
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static inline void a_or(volatile int *p, int v)
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{
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int old;
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do old = *p;
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while (__k_cas(old, old|v, p));
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}
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static inline void a_or_l(volatile void *p, long v)
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{
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a_or(p, v);
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}
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static inline void a_and_64(volatile uint64_t *p, uint64_t v)
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{
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union { uint64_t v; uint32_t r[2]; } u = { v };
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a_and((int *)p, u.r[0]);
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a_and((int *)p+1, u.r[1]);
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}
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static inline void a_or_64(volatile uint64_t *p, uint64_t v)
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{
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union { uint64_t v; uint32_t r[2]; } u = { v };
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a_or((int *)p, u.r[0]);
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a_or((int *)p+1, u.r[1]);
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}
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#endif

‎micromusl/arch/arm/bits/alltypes.h.in

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#define _Addr int
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#define _Int64 long long
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#define _Reg int
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TYPEDEF __builtin_va_list va_list;
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TYPEDEF __builtin_va_list __isoc_va_list;
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#ifndef __cplusplus
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TYPEDEF unsigned wchar_t;
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#endif
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TYPEDEF unsigned wint_t;
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TYPEDEF float float_t;
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TYPEDEF double double_t;
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TYPEDEF long time_t;
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TYPEDEF long suseconds_t;
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TYPEDEF struct { union { int __i[9]; unsigned __s[9]; } __u; } pthread_attr_t;
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TYPEDEF struct { union { int __i[6]; void *__p[6]; } __u; } pthread_mutex_t;
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TYPEDEF struct { union { int __i[12]; void *__p[12]; } __u; } pthread_cond_t;
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TYPEDEF struct { union { int __i[8]; void *__p[8]; } __u; } pthread_rwlock_t;
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TYPEDEF struct { union { int __i[5]; void *__p[5]; } __u; } pthread_barrier_t;

‎micromusl/arch/arm/bits/endian.h

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#if __ARMEB__
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#define __BYTE_ORDER __BIG_ENDIAN
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#else
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#define __BYTE_ORDER __LITTLE_ENDIAN
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#endif

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