From 8370d0a3eb373c37386de32ccd3a8a38ddeb8b02 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Sat, 6 Apr 2024 19:46:41 -0400 Subject: build: Statically link libc Signed-off-by: Ian Moffett --- lib/libc/Makefile | 19 +++++++------ lib/libc/linker/entry.S | 51 ----------------------------------- lib/libc/linker/entry.c | 60 ------------------------------------------ lib/libc/src/arch/amd64/crt0.S | 51 +++++++++++++++++++++++++++++++++++ lib/libc/src/main.c | 42 +++++++++++++++++++++++++++++ 5 files changed, 104 insertions(+), 119 deletions(-) delete mode 100644 lib/libc/linker/entry.S delete mode 100644 lib/libc/linker/entry.c create mode 100644 lib/libc/src/arch/amd64/crt0.S create mode 100644 lib/libc/src/main.c (limited to 'lib') diff --git a/lib/libc/Makefile b/lib/libc/Makefile index fabb532..76a5359 100644 --- a/lib/libc/Makefile +++ b/lib/libc/Makefile @@ -5,14 +5,17 @@ LIBC_ASMFILES = $(shell find src/ -name "*.S") LIBC_OBJ = $(LIBC_CFILES:.c=.o) LIBC_ASMOBJ = $(LIBC_ASMFILES:.S=.S.o) -all: $(LIBC_OBJ) build/ld.so - -build/ld.so: build/ linker/entry.c linker/entry.S - mkdir -p $(@D) - $(CC) $(CFLAGS) linker/entry.S -o build/entry.S.o - $(CC) $(CFLAGS) linker/entry.c -o build/entry.o - $(LD) -znoexecstack $(LIBC_OBJ) \ - build/entry.o build/entry.S.o -o $@ +all: $(LIBC_ASMOBJ) $(LIBC_OBJ) build/libc.a + +build/libc.a: build/ + ar rcs build/libc.a $(LIBC_OBJ) $(LIBC_ASMOBJ) + +#build/ld.so: build/ linker/entry.c linker/entry.S +# mkdir -p $(@D) +# $(CC) $(CFLAGS) linker/entry.S -o build/entry.S.o +# $(CC) $(CFLAGS) linker/entry.c -o build/entry.o +# $(LD) -znoexecstack $(LIBC_OBJ) \ +# build/entry.o build/entry.S.o -o $@ %.o: %.c $(CC) $(CFLAGS) $< -o $@ diff --git a/lib/libc/linker/entry.S b/lib/libc/linker/entry.S deleted file mode 100644 index 1f982f9..0000000 --- a/lib/libc/linker/entry.S +++ /dev/null @@ -1,51 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#if !defined(__hyra__) -#error "Hyra supported only" -#endif - -#include - -.section .text, "ax", @progbits -.globl _start -_start: - // Mark end of callstack - xor %rbp, %rbp - - // Load process context as per the sysv AMD64 ABI - lea (%rsp), %rdi - call entry - - // We are done, now we exit - mov $SYS_exit, %rax - xor %rdi, %rdi - int $0x80 - nop - ud2 diff --git a/lib/libc/linker/entry.c b/lib/libc/linker/entry.c deleted file mode 100644 index 55bf312..0000000 --- a/lib/libc/linker/entry.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include -#include -#include -#include -#include - -#if !defined(__hyra__) -#error "Hyra supported only" -#endif - -void -entry(const uint64_t *ctx) -{ - uint64_t argc = *ctx; - uint64_t auxv[AT_MAX_COUNT] = {0}; - int envc; - - const char **argv = (const char **)(ctx + 1); - const char **envp = (const char **)(argv + argc + 1); - struct auxv_entry *auxvp; - - /* Read-in auxiliary vector */ - auxvp = (struct auxv_entry *)(envp + envc + 1); - for (; auxvp->tag != AT_NULL; ++auxvp) { - if (auxvp->tag < AT_MAX_COUNT) { - auxv[auxvp->tag] = auxvp->val; - } - } - - /* TODO */ -} diff --git a/lib/libc/src/arch/amd64/crt0.S b/lib/libc/src/arch/amd64/crt0.S new file mode 100644 index 0000000..17dddc6 --- /dev/null +++ b/lib/libc/src/arch/amd64/crt0.S @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#if !defined(__hyra__) +#error "Hyra supported only" +#endif + +#include + +.text +.globl _start +_start: + // Mark end of callstack + xor %rbp, %rbp + + // Load process context and call entry + lea (%rsp), %rdi + call __libc_entry + + // We are done, now we exit + mov $SYS_exit, %rax + xor %rdi, %rdi + int $0x80 + nop + ud2 diff --git a/lib/libc/src/main.c b/lib/libc/src/main.c new file mode 100644 index 0000000..477842b --- /dev/null +++ b/lib/libc/src/main.c @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include + +int main(int argc, const char **argv, const char **envp); + +int +__libc_entry(uint64_t *ctx) +{ + uint64_t argc = *ctx; + const char **argv = (const char **)(ctx + 1); + const char **envp = (const char **)(argv + argc + 1); + + return main(argc, argv, envp); +} -- cgit v1.2.3