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user: implement mlibc as the libc, finally.

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It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>
This commit is contained in:
kaguya
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
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user/include/mlibc/sysdeps/managarm/x86_64/assembly-asserts.cpp
+24
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#include <abi-bits/signal.h>
#include <stddef.h>
#include "context-offsets.h"
// offsets int ucontext_t as used in signals.S
static_assert(offsetof(ucontext_t, uc_mcontext) == UCONTEXT_GREGS_OFFSET);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R8]) == UCONTEXT_OFFSET_R8);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R9]) == UCONTEXT_OFFSET_R9);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R10]) == UCONTEXT_OFFSET_R10);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R11]) == UCONTEXT_OFFSET_R11);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R12]) == UCONTEXT_OFFSET_R12);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R13]) == UCONTEXT_OFFSET_R13);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R14]) == UCONTEXT_OFFSET_R14);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_R15]) == UCONTEXT_OFFSET_R15);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RDI]) == UCONTEXT_OFFSET_RDI);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RSI]) == UCONTEXT_OFFSET_RSI);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RBP]) == UCONTEXT_OFFSET_RBP);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RBX]) == UCONTEXT_OFFSET_RBX);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RDX]) == UCONTEXT_OFFSET_RDX);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RAX]) == UCONTEXT_OFFSET_RAX);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RCX]) == UCONTEXT_OFFSET_RCX);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RSP]) == UCONTEXT_OFFSET_RSP);
static_assert(offsetof(ucontext_t, uc_mcontext.gregs[REG_RIP]) == UCONTEXT_OFFSET_RIP);
user/include/mlibc/sysdeps/managarm/x86_64/context-offsets.h
+21
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#pragma once
#define UCONTEXT_GREGS_OFFSET 40
#define UCONTEXT_OFFSET_R8 (UCONTEXT_GREGS_OFFSET + 0)
#define UCONTEXT_OFFSET_R9 (UCONTEXT_GREGS_OFFSET + 8)
#define UCONTEXT_OFFSET_R10 (UCONTEXT_GREGS_OFFSET + 16)
#define UCONTEXT_OFFSET_R11 (UCONTEXT_GREGS_OFFSET + 24)
#define UCONTEXT_OFFSET_R12 (UCONTEXT_GREGS_OFFSET + 32)
#define UCONTEXT_OFFSET_R13 (UCONTEXT_GREGS_OFFSET + 40)
#define UCONTEXT_OFFSET_R14 (UCONTEXT_GREGS_OFFSET + 48)
#define UCONTEXT_OFFSET_R15 (UCONTEXT_GREGS_OFFSET + 56)
#define UCONTEXT_OFFSET_RDI (UCONTEXT_GREGS_OFFSET + 64)
#define UCONTEXT_OFFSET_RSI (UCONTEXT_GREGS_OFFSET + 72)
#define UCONTEXT_OFFSET_RBP (UCONTEXT_GREGS_OFFSET + 80)
#define UCONTEXT_OFFSET_RBX (UCONTEXT_GREGS_OFFSET + 88)
#define UCONTEXT_OFFSET_RDX (UCONTEXT_GREGS_OFFSET + 96)
#define UCONTEXT_OFFSET_RAX (UCONTEXT_GREGS_OFFSET + 104)
#define UCONTEXT_OFFSET_RCX (UCONTEXT_GREGS_OFFSET + 112)
#define UCONTEXT_OFFSET_RSP (UCONTEXT_GREGS_OFFSET + 120)
#define UCONTEXT_OFFSET_RIP (UCONTEXT_GREGS_OFFSET + 128)
user/include/mlibc/sysdeps/managarm/x86_64/crt-src/Scrt1.S
+8
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.section .text
.global _start
_start:
mov %rsp, %rdi
lea main(%rip), %rsi
call __mlibc_entry
.section .note.GNU-stack,"",%progbits
user/include/mlibc/sysdeps/managarm/x86_64/crt-src/crt0.S
+10
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@@ -0,0 +1,10 @@
.section .text
.global _start
_start:
mov %rsp, %rdi
mov $main, %rsi
call __mlibc_entry
.section .note.GNU-stack,"",%progbits
user/include/mlibc/sysdeps/managarm/x86_64/crt-src/crti.S
+15
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.ident "x86_64-managarm-mlibc crti"
.section .init
.globl _init
.type _init,@function
_init:
push %rax
.section .fini
.globl _fini
.type _fini,@function
_fini:
push %rax
.section .note.GNU-stack,"",%progbits
user/include/mlibc/sysdeps/managarm/x86_64/crt-src/crtn.S
+11
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.ident "x86_64-managarm-mlibc crtn"
.section .init
pop %rax
ret
.section .fini
pop %rax
ret
.section .note.GNU-stack,"",%progbits
user/include/mlibc/sysdeps/managarm/x86_64/signals.S
+33
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#include "mlibc-asm/dwarf-helpers.h"
#include "mlibc-asm/helpers.h"
#include "context-offsets.h"
.section .text
.cfi_startproc
.cfi_signal_frame
cfi_set_cfa_to_ptr_with_offset DWARF_REG_RSP, UCONTEXT_OFFSET_RSP
cfi_set_prev_reg_value DWARF_REG_R8, DWARF_REG_RSP, UCONTEXT_OFFSET_R8
cfi_set_prev_reg_value DWARF_REG_R9, DWARF_REG_RSP, UCONTEXT_OFFSET_R9
cfi_set_prev_reg_value DWARF_REG_R10, DWARF_REG_RSP, UCONTEXT_OFFSET_R10
cfi_set_prev_reg_value DWARF_REG_R11, DWARF_REG_RSP, UCONTEXT_OFFSET_R11
cfi_set_prev_reg_value DWARF_REG_R12, DWARF_REG_RSP, UCONTEXT_OFFSET_R12
cfi_set_prev_reg_value DWARF_REG_R13, DWARF_REG_RSP, UCONTEXT_OFFSET_R13
cfi_set_prev_reg_value DWARF_REG_R14, DWARF_REG_RSP, UCONTEXT_OFFSET_R14
cfi_set_prev_reg_value DWARF_REG_R15, DWARF_REG_RSP, UCONTEXT_OFFSET_R15
cfi_set_prev_reg_value DWARF_REG_RDI, DWARF_REG_RSP, UCONTEXT_OFFSET_RDI
cfi_set_prev_reg_value DWARF_REG_RSI, DWARF_REG_RSP, UCONTEXT_OFFSET_RSI
cfi_set_prev_reg_value DWARF_REG_RBP, DWARF_REG_RSP, UCONTEXT_OFFSET_RBP
cfi_set_prev_reg_value DWARF_REG_RBX, DWARF_REG_RSP, UCONTEXT_OFFSET_RBX
cfi_set_prev_reg_value DWARF_REG_RDX, DWARF_REG_RSP, UCONTEXT_OFFSET_RDX
cfi_set_prev_reg_value DWARF_REG_RAX, DWARF_REG_RSP, UCONTEXT_OFFSET_RAX
cfi_set_prev_reg_value DWARF_REG_RCX, DWARF_REG_RSP, UCONTEXT_OFFSET_RCX
cfi_set_prev_reg_value DWARF_REG_RETURN_ADDRESS, DWARF_REG_RSP, UCONTEXT_OFFSET_RIP
nop
PROC_START_NOCFI(__mlibc_signal_restore)
mov $0x80000006, %rdi
syscall
ud2
PROC_END(__mlibc_signal_restore)
GNU_STACK_NOTE()
user/include/mlibc/sysdeps/managarm/x86_64/thread.cpp
+65
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#include <bits/ensure.h>
#include <errno.h>
#include <mlibc/all-sysdeps.hpp>
#include <mlibc/tcb.hpp>
#include <mlibc/thread-entry.hpp>
#include <stddef.h>
#include <stdint.h>
#include <sys/mman.h>
extern "C" void __mlibc_enter_thread(void *entry, void *user_arg, Tcb *tcb) {
// Wait until our parent sets up the TID.
while (!__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED))
mlibc::sys_futex_wait(&tcb->tid, 0, nullptr);
if (mlibc::sys_tcb_set(tcb))
__ensure(!"sys_tcb_set() failed");
tcb->invokeThreadFunc(entry, user_arg);
auto self = reinterpret_cast<Tcb *>(tcb);
__atomic_store_n(&self->didExit, 1, __ATOMIC_RELEASE);
mlibc::sys_futex_wake(&self->didExit);
mlibc::sys_thread_exit();
}
namespace mlibc {
static constexpr size_t default_stacksize = 0x200000;
int sys_prepare_stack(
void **stack,
void *entry,
void *user_arg,
void *tcb,
size_t *stack_size,
size_t *guard_size,
void **stack_base
) {
if (!*stack_size)
*stack_size = default_stacksize;
*guard_size = 0;
if (*stack) {
*stack_base = *stack;
} else {
*stack_base =
mmap(nullptr, *stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (*stack_base == MAP_FAILED) {
return errno;
}
}
uintptr_t *sp =
reinterpret_cast<uintptr_t *>(reinterpret_cast<uintptr_t>(*stack_base) + *stack_size);
*--sp = reinterpret_cast<uintptr_t>(tcb);
*--sp = reinterpret_cast<uintptr_t>(user_arg);
*--sp = reinterpret_cast<uintptr_t>(entry);
*stack = reinterpret_cast<void *>(sp);
return 0;
}
} // namespace mlibc
user/include/mlibc/sysdeps/managarm/x86_64/thread_entry.S
+22
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.section .text
.global __mlibc_start_thread
.type __mlibc_start_thread, "function"
.cfi_startproc
__mlibc_start_thread:
.cfi_undefined %rip
.cfi_undefined %rbp
pop %rdi
.cfi_adjust_cfa_offset -8
.cfi_undefined %rdi
pop %rsi
.cfi_adjust_cfa_offset -8
.cfi_undefined %rsi
pop %rdx
.cfi_adjust_cfa_offset -8
.cfi_undefined %rdx
call __mlibc_enter_thread
ud2
.cfi_endproc
.section .note.GNU-stack,"",%progbits