user: implement mlibc as the libc, finally.

It's finally done.. Signed-off-by: kaguya <vpshinomiya@protonmail.com>
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <elf.h>
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_MACHINE EM_68K
+
+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;
+
+using elf_version = Elf32_Half;
+using elf_verdef = Elf32_Verdef;
+using elf_verdaux = Elf32_Verdaux;
+using elf_verneed = Elf32_Verneed;
+using elf_vernaux = Elf32_Vernaux;
+
+#define ELF_R_SYM ELF32_R_SYM
+#define ELF_R_TYPE ELF32_R_TYPE
+#define ELF_ST_BIND ELF32_ST_BIND
+#define ELF_ST_TYPE ELF32_ST_TYPE
+
+#define R_NONE R_68K_NONE
+#define R_JUMP_SLOT R_68K_JMP_SLOT
+#define R_ABSOLUTE R_68K_32
+#define R_GLOB_DAT R_68K_GLOB_DAT
+#define R_RELATIVE R_68K_RELATIVE
+#define R_OFFSET R_68K_PC32
+#define R_COPY R_68K_COPY
+#define R_TLS_DTPMOD R_68K_TLS_DTPMOD32
+#define R_TLS_DTPREL R_68K_TLS_DTPREL32
+#define R_TLS_TPREL R_68K_TLS_TPREL32
+#define R_IRELATIVE 222 /* doesn't happen */
+
+#define TP_TCB_OFFSET 0
+
+using ifunc_handler = elf_addr (*)(void);
@@ -0,0 +1,21 @@
+#include "mlibc-asm/helpers.h"
+
+PROC_START(_start)
+	lea (_GLOBAL_OFFSET_TABLE_@GOTPC,%pc), %a0
+	lea (_DYNAMIC,%pc), %a1
+
+	move.l %a1, %a5
+	sub.l (%a0), %a5
+
+	move.l %a5, -(%sp)
+	move.l %a1, -(%sp)
+	jbsr relocateSelf68k@PLTPC
+	addq.l #8, %sp
+
+	move.l %sp, -(%sp)
+	jbsr interpreterMain@PLTPC
+
+	jmp (%a0)
+PROC_END(_start)
+
+GNU_STACK_NOTE()
@@ -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
+	illegal
+
+.section .note.GNU-stack,"",%progbits