1 #include <stdlib.h> 2 #include <errno.h> 3 4 #include "elfutils.h" 5 6 unsigned long elf_hash(const unsigned char *name) { 7 unsigned long h = 0; 8 unsigned long g; 9 10 while (*name) { 11 h = (h << 4) + *name++; 12 if ((g = h & 0xF0000000)) 13 h ^= g >> 24; 14 15 h &= ~g; 16 } 17 18 return h; 19 } 20 21 unsigned long elf_gnu_hash(const unsigned char *name) { 22 unsigned long h = 5381; 23 unsigned char c; 24 25 for (c = *name; c != '\0'; c = *++name) { 26 h = h * 33 + c; 27 } 28 29 return h & 0xFFFFFFFF; 30 } 31 32 #ifndef HAVE_ELF_POSIX_MEMALIGN 33 34 struct memalign_info { 35 void *start_addr; 36 char data[0]; 37 }; 38 39 int elf_malloc(void **memptr, size_t alignment, size_t size) { 40 char *start_addr = NULL; 41 struct memalign_info *info; 42 43 if ((alignment & (alignment - 1)) != 0) 44 return EINVAL; 45 if (alignment % sizeof(void*) != 0) 46 alignment = sizeof(void*); 47 48 start_addr = malloc(size + (alignment > sizeof(struct memalign_info) ? 49 alignment : sizeof(struct memalign_info))); 50 51 if (start_addr == NULL) 52 return ENOMEM; 53 54 55 info = (struct memalign_info*)(start_addr - 56 ((unsigned long)start_addr % alignment) + 57 alignment - sizeof(struct memalign_info)); 58 59 info->start_addr = start_addr; 60 61 *memptr = info->data; 62 63 return 0; 64 } 65 66 void elf_free(char *memptr) { 67 struct memalign_info *info = (struct memalign_info*)(memptr - 68 sizeof(struct memalign_info)); 69 70 free(info->start_addr); 71 } 72 73 #else 74 75 int elf_malloc(void **memptr, size_t alignment, size_t size) { 76 if ((alignment & (alignment - 1)) != 0) 77 return EINVAL; 78 79 if (alignment % sizeof(void*) != 0) 80 alignment = sizeof(void*); 81 82 return posix_memalign(memptr, alignment, size); 83 } 84 85 void elf_free(void *memptr) { 86 free(memptr); 87 } 88 89 #endif //HAVE_ELF_POSIX_MEMALIGN 90
