Handle IRQs inside the kernel

kernel/mm/_malloc_port.c

@@ -0,0 +1,82 @@
+#include <libk/align.h>
+#include <libk/string.h>
+#include <limine/requests.h>
+#include <mm/pmm.h>
+#include <page_size.h>
+#include <stdint.h>
+#include <sys/debug.h>
+
+#define LACKS_UNISTD_H    1
+#define LACKS_SYS_MMAN_H  1
+#define LACKS_SYS_PARAM_H 1
+#define LACKS_FCNTL_H     1
+#define LACKS_SYS_TYPES_H 1
+#define LACKS_SCHED_H     1
+#define LACKS_ERRNO_H     1
+#define LACKS_STDLIB_H    1
+#define LACKS_TIME_H      1
+#define LACKS_STRINGS_H   1
+
+#define ABORT                                                                                      \
+  {                                                                                                \
+    (void)0;                                                                                       \
+  }
+#define MALLOC_ALIGNMENT 16
+#define HAVE_MORECORE    0
+#define NO_MALLOC_STATS  1
+#define USE_LOCKS        1
+#define MALLOC_FAILURE_ACTION                                                                      \
+  do {                                                                                             \
+    DEBUG ("malloc failure\n");                                                                    \
+  } while (0)
+#define EINVAL                 -1
+#define ENOMEM                 -1
+#define DEFAULT_MMAP_THRESHOLD 0
+
+#define open        _open_dummy
+#define O_RDWR      0
+#define PROT_READ   0
+#define PROT_WRITE  0
+#define MAP_PRIVATE 0
+#define fprintf(...)
+
+int _open_dummy (const char* path, uint16_t modes) {
+  (void)path, (void)modes;
+  return 0;
+}
+
+void* mmap (void* addr, size_t size, int prot, int flags, int fd, size_t off) {
+  (void)prot, (void)fd, (void)off, (void)flags;
+
+  if (size == 0)
+    return (void*)-1;
+
+  size = div_align_up (size, PAGE_SIZE);
+
+  physaddr_t p_addr = pmm_alloc (size);
+
+  if (p_addr == PMM_ALLOC_ERR)
+    return (void*)-1;
+
+  struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
+  uintptr_t a = (uintptr_t)(p_addr + hhdm->offset);
+
+  memset ((void*)a, 0, size * PAGE_SIZE);
+
+  return (void*)a;
+}
+
+int munmap (void* addr, size_t length) {
+  if (length == 0)
+    return 0;
+
+  length = div_align_up (length, PAGE_SIZE);
+
+  struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
+
+  physaddr_t p_addr = (uintptr_t)addr - hhdm->offset;
+
+  pmm_free (p_addr, length);
+
+  return 0;
+}