From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 7 Mar 2024 17:28:00 -0500
Subject: lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 lib/mlibc/sysdeps/hyra/generic/entry.cpp |  35 +++++++++
 lib/mlibc/sysdeps/hyra/generic/hyra.cpp  | 121 +++++++++++++++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 lib/mlibc/sysdeps/hyra/generic/entry.cpp
 create mode 100644 lib/mlibc/sysdeps/hyra/generic/hyra.cpp

(limited to 'lib/mlibc/sysdeps/hyra/generic')

diff --git a/lib/mlibc/sysdeps/hyra/generic/entry.cpp b/lib/mlibc/sysdeps/hyra/generic/entry.cpp
new file mode 100644
index 0000000..d5129af
--- /dev/null
+++ b/lib/mlibc/sysdeps/hyra/generic/entry.cpp
@@ -0,0 +1,35 @@
+#include <bits/ensure.h>
+#include <mlibc/elf/startup.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+// defined by the POSIX library
+void __mlibc_initLocale();
+
+extern "C" uintptr_t *__dlapi_entrystack();
+
+extern char **environ;
+static mlibc::exec_stack_data __mlibc_stack_data;
+
+struct LibraryGuard {
+    LibraryGuard();
+};
+
+static LibraryGuard guard;
+
+LibraryGuard::LibraryGuard() {
+    __mlibc_initLocale();
+
+    // Parse the exec() stack.
+    mlibc::parse_exec_stack(__dlapi_entrystack(), &__mlibc_stack_data);
+    mlibc::set_startup_data(__mlibc_stack_data.argc, __mlibc_stack_data.argv,
+                            __mlibc_stack_data.envp);
+}
+
+extern "C" void __mlibc_entry(int (*main_fn)(int argc, char *argv[],
+                                             char *env[])) {
+    // TODO: call __dlapi_enter, otherwise static builds will break (see Linux
+    // sysdeps)
+    auto result = main_fn(__mlibc_stack_data.argc, __mlibc_stack_data.argv, environ);
+    exit(result);
+}
diff --git a/lib/mlibc/sysdeps/hyra/generic/hyra.cpp b/lib/mlibc/sysdeps/hyra/generic/hyra.cpp
new file mode 100644
index 0000000..fb555b9
--- /dev/null
+++ b/lib/mlibc/sysdeps/hyra/generic/hyra.cpp
@@ -0,0 +1,121 @@
+#include <stddef.h>
+#include <sys/types.h>
+#include <hyra/syscall.h>
+
+namespace mlibc {
+void sys_libc_log(const char *msg) {
+    __syscall(0, (uintptr_t)msg);
+}
+
+int sys_anon_allocate(size_t size, void **pointer) {
+    (void)size;
+    (void)pointer;
+    while (1);
+}
+
+void sys_libc_panic() {
+    sys_libc_log("\n** MLIBC PANIC **\n");
+    while (1);
+}
+
+int sys_tcb_set(void *pointer) {
+    (void)pointer;
+
+    while (1);
+}
+
+void sys_exit(int status) {
+}
+
+void sys_seek(int fd, off_t offset, int whence, off_t *new_offset) {
+    (void)fd;
+    (void)offset;
+    (void)whence;
+    (void)new_offset;
+
+    while (1);
+}
+
+int sys_vm_map(void *hint, size_t size, int prot, int flags, int fd,
+               off_t offset, void **window) {
+    (void)hint;
+    (void)size;
+    (void)prot;
+    (void)flags;
+    (void)fd;
+    (void)offset;
+    (void)window;
+
+    while (1);
+}
+
+int sys_vm_unmap(void *address, size_t size) {
+    (void)address;
+    (void)size;
+
+    while (1);
+}
+
+int sys_anon_free(void *pointer, size_t size) {
+    (void)pointer;
+    (void)size;
+
+    while (1);
+}
+
+int sys_clock_get(int clock, time_t *secs, long *nanos) {
+    (void)clock;
+    (void)secs;
+    (void)nanos;
+
+    while (1);
+}
+
+int sys_futex_wait(int *pointer, int expected, const struct timespec *time) {
+    (void)pointer;
+    (void)expected;
+    (void)time;
+
+    return 0;
+}
+
+int sys_futex_wake(int *pointer) {
+    (void)pointer;
+
+    return 0;
+}
+
+int sys_open(const char *filename, int flags, mode_t mode, int *fd) {
+    (void)filename;
+    (void)flags;
+    (void)mode;
+    (void)fd;
+
+    while (1);
+}
+
+int sys_read(int fd, void *buf, size_t count, ssize_t *bytes_read) {
+    (void)fd;
+    (void)buf;
+    (void)count;
+    (void)bytes_read;
+
+    while (1);
+}
+
+int sys_write(int fd, const void *buffer, size_t count, ssize_t *written) {
+    (void)fd;
+    (void)buffer;
+    (void)count;
+    (void)written;
+
+    while (1);
+}
+
+int sys_close(int fd) {
+    (void)fd;
+
+    while (1);
+}
+
+}
-- 
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