lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

3 files changed, 53 insertions, 0 deletions

diff --git a/lib/mlibc/options/rtdl/riscv64/elf.hpp b/lib/mlibc/options/rtdl/riscv64/elf.hpp
new file mode 100644
index 0000000..5d7039a
--- /dev/null
+++ b/lib/mlibc/options/rtdl/riscv64/elf.hpp
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <elf.h>
+
+#define ELF_CLASS ELFCLASS64
+#define ELF_MACHINE EM_RISCV
+
+using elf_ehdr = Elf64_Ehdr;
+using elf_phdr = Elf64_Phdr;
+using elf_dyn = Elf64_Dyn;
+using elf_rel = Elf64_Rel;
+using elf_rela = Elf64_Rela;
+using elf_relr = Elf64_Relr;
+using elf_sym = Elf64_Sym;
+using elf_addr = Elf64_Addr;
+
+using elf_info = Elf64_Xword;
+using elf_addend = Elf64_Sxword;
+
+#define ELF_R_SYM ELF64_R_SYM
+#define ELF_R_TYPE ELF64_R_TYPE
+#define ELF_ST_BIND ELF64_ST_BIND
+
+#define R_NONE R_RISCV_NONE
+#define R_JUMP_SLOT R_RISCV_JUMP_SLOT
+#define R_ABSOLUTE R_RISCV_64
+#define R_GLOB_DAT R_RISCV_64
+#define R_RELATIVE R_RISCV_RELATIVE
+#define R_IRELATIVE R_RISCV_IRELATIVE
+// #define R_OFFSET
+#define R_COPY R_RISCV_COPY
+#define R_TLS_DTPMOD R_RISCV_TLS_DTPMOD64
+#define R_TLS_DTPREL R_RISCV_TLS_DTPREL64
+#define R_TLS_TPREL R_RISCV_TLS_TPREL64
+#define R_TLSDESC R_RISCV_TLSDESC
+
+#define TP_TCB_OFFSET 0
diff --git a/lib/mlibc/options/rtdl/riscv64/entry.S b/lib/mlibc/options/rtdl/riscv64/entry.S
new file mode 100644
index 0000000..b7cf854
--- /dev/null
+++ b/lib/mlibc/options/rtdl/riscv64/entry.S
@@ -0,0 +1,11 @@
+.global _start
+_start:
+	call relocateSelf
+
+	mv a0, sp
+	call interpreterMain
+
+	jr a0
+
+.section .note.GNU-stack,"",%progbits
+
diff --git a/lib/mlibc/options/rtdl/riscv64/runtime.S b/lib/mlibc/options/rtdl/riscv64/runtime.S
new file mode 100644
index 0000000..5128fd3
--- /dev/null
+++ b/lib/mlibc/options/rtdl/riscv64/runtime.S
@@ -0,0 +1,5 @@
+.global pltRelocateStub
+pltRelocateStub:
+	unimp // TODO
+.section .note.GNU-stack,"",%progbits
+