linux_compat.c 1.1 KB

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  1. #include <common.h>
  2. #include <malloc.h>
  3. #include <memalign.h>
  4. #include <linux/compat.h>
  5. struct p_current cur = {
  6. .pid = 1,
  7. };
  8. __maybe_unused struct p_current *current = &cur;
  9. unsigned long copy_from_user(void *dest, const void *src,
  10. unsigned long count)
  11. {
  12. memcpy((void *)dest, (void *)src, count);
  13. return 0;
  14. }
  15. void *kmalloc(size_t size, int flags)
  16. {
  17. void *p;
  18. p = malloc_cache_aligned(size);
  19. if (p && flags & __GFP_ZERO)
  20. memset(p, 0, size);
  21. return p;
  22. }
  23. struct kmem_cache *get_mem(int element_sz)
  24. {
  25. struct kmem_cache *ret;
  26. ret = memalign(ARCH_DMA_MINALIGN, sizeof(struct kmem_cache));
  27. ret->sz = element_sz;
  28. return ret;
  29. }
  30. void *kmem_cache_alloc(struct kmem_cache *obj, int flag)
  31. {
  32. return malloc_cache_aligned(obj->sz);
  33. }
  34. /**
  35. * kmemdup - duplicate region of memory
  36. *
  37. * @src: memory region to duplicate
  38. * @len: memory region length
  39. * @gfp: GFP mask to use
  40. *
  41. * Return: newly allocated copy of @src or %NULL in case of error
  42. */
  43. void *kmemdup(const void *src, size_t len, gfp_t gfp)
  44. {
  45. void *p;
  46. p = kmalloc(len, gfp);
  47. if (p)
  48. memcpy(p, src, len);
  49. return p;
  50. }