From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 7 Mar 2024 17:28:00 -0500 Subject: lib: Add mlibc Signed-off-by: Ian Moffett --- lib/mlibc/options/rtdl/x86/elf.hpp | 37 ++++++++++++++++++++++++++++++++++++ lib/mlibc/options/rtdl/x86/entry.S | 10 ++++++++++ lib/mlibc/options/rtdl/x86/runtime.S | 9 +++++++++ 3 files changed, 56 insertions(+) create mode 100644 lib/mlibc/options/rtdl/x86/elf.hpp create mode 100644 lib/mlibc/options/rtdl/x86/entry.S create mode 100755 lib/mlibc/options/rtdl/x86/runtime.S (limited to 'lib/mlibc/options/rtdl/x86') diff --git a/lib/mlibc/options/rtdl/x86/elf.hpp b/lib/mlibc/options/rtdl/x86/elf.hpp new file mode 100644 index 0000000..95800aa --- /dev/null +++ b/lib/mlibc/options/rtdl/x86/elf.hpp @@ -0,0 +1,37 @@ +#pragma once + +#include + +#define ELF_CLASS ELFCLASS32 +#define ELF_MACHINE EM_386 + +using elf_ehdr = Elf32_Ehdr; +using elf_phdr = Elf32_Phdr; +using elf_dyn = Elf32_Dyn; +using elf_rel = Elf32_Rel; +using elf_rela = Elf32_Rela; +using elf_relr = Elf32_Relr; +using elf_sym = Elf32_Sym; +using elf_addr = Elf32_Addr; + +using elf_info = Elf32_Word; +using elf_addend = Elf32_Sword; + +#define ELF_R_SYM ELF32_R_SYM +#define ELF_R_TYPE ELF32_R_TYPE +#define ELF_ST_BIND ELF32_ST_BIND + +#define R_NONE R_386_NONE +#define R_JUMP_SLOT R_386_JMP_SLOT +#define R_ABSOLUTE R_386_32 +#define R_GLOB_DAT R_386_GLOB_DAT +#define R_RELATIVE R_386_RELATIVE +#define R_IRELATIVE R_386_IRELATIVE +#define R_OFFSET R_386_PC32 +#define R_COPY R_386_COPY +#define R_TLS_DTPMOD R_386_TLS_DTPMOD32 +#define R_TLS_DTPREL R_386_TLS_DTPOFF32 +#define R_TLS_TPREL R_386_TLS_TPOFF +#define R_TLSDESC R_386_TLS_DESC + +#define TP_TCB_OFFSET 0 diff --git a/lib/mlibc/options/rtdl/x86/entry.S b/lib/mlibc/options/rtdl/x86/entry.S new file mode 100644 index 0000000..963185b --- /dev/null +++ b/lib/mlibc/options/rtdl/x86/entry.S @@ -0,0 +1,10 @@ +.global _start +_start: + call relocateSelf + + push %esp + call interpreterMain + + jmp *%eax + +.section .note.GNU-stack,"",%progbits diff --git a/lib/mlibc/options/rtdl/x86/runtime.S b/lib/mlibc/options/rtdl/x86/runtime.S new file mode 100755 index 0000000..40a175f --- /dev/null +++ b/lib/mlibc/options/rtdl/x86/runtime.S @@ -0,0 +1,9 @@ +.global pltRelocateStub +# save / restore all registers that can hold function parameters +pltRelocateStub: + # we need to save / restore all registers than can hold function arguments + # we do not need to save callee-saved registers as they will not be trashed by lazyRelocate + # TODO: save floating point argument registers + ud2 + +.section .note.GNU-stack,"",%progbits -- cgit v1.2.3