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| Rev 3222 | Rev 4471 | ||
|---|---|---|---|
| Line 28... | Line 28... | ||
| 28 | 28 | ||
| 29 | /** @addtogroup libc |
29 | /** @addtogroup libc |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #include <as.h> |
35 | #include <as.h> |
| 36 | #include <libc.h> |
36 | #include <libc.h> |
| 37 | #include <unistd.h> |
37 | #include <unistd.h> |
| 38 | #include <align.h> |
38 | #include <align.h> |
| Line 100... | Line 100... | ||
| 100 | } |
100 | } |
| 101 | 101 | ||
| 102 | static size_t heapsize = 0; |
102 | static size_t heapsize = 0; |
| 103 | static size_t maxheapsize = (size_t) (-1); |
103 | static size_t maxheapsize = (size_t) (-1); |
| 104 | 104 | ||
| 105 | static void * last_allocated = 0; |
105 | static void *last_allocated = 0; |
| 106 | 106 | ||
| 107 | /* Start of heap linker symbol */ |
107 | /* Start of heap linker symbol */ |
| 108 | extern char _heap; |
108 | extern char _heap; |
| 109 | 109 | ||
| 110 | /** Sbrk emulation |
110 | /** Sbrk emulation |
| Line 117... | Line 117... | ||
| 117 | { |
117 | { |
| 118 | int rc; |
118 | int rc; |
| 119 | void *res; |
119 | void *res; |
| 120 | 120 | ||
| 121 | /* Check for invalid values */ |
121 | /* Check for invalid values */ |
| 122 | if (incr < 0 && -incr > heapsize) |
122 | if ((incr < 0) && (((size_t) -incr) > heapsize)) |
| 123 | return NULL; |
123 | return NULL; |
| 124 | 124 | ||
| 125 | /* Check for too large value */ |
125 | /* Check for too large value */ |
| 126 | if (incr > 0 && incr+heapsize < heapsize) |
126 | if ((incr > 0) && (incr + heapsize < heapsize)) |
| 127 | return NULL; |
127 | return NULL; |
| 128 | 128 | ||
| 129 | /* Check for too small values */ |
129 | /* Check for too small values */ |
| 130 | if (incr < 0 && incr+heapsize > heapsize) |
130 | if ((incr < 0) && (incr + heapsize > heapsize)) |
| 131 | return NULL; |
131 | return NULL; |
| 132 | 132 | ||
| 133 | /* Check for user limit */ |
133 | /* Check for user limit */ |
| 134 | if ((maxheapsize != (size_t) (-1)) && (heapsize + incr) > maxheapsize) |
134 | if ((maxheapsize != (size_t) (-1)) && (heapsize + incr) > maxheapsize) |
| 135 | return NULL; |
135 | return NULL; |
| Line 173... | Line 173... | ||
| 173 | return NULL; |
173 | return NULL; |
| 174 | 174 | ||
| 175 | asz = 1 << (fnzb64(sz - 1) + 1); |
175 | asz = 1 << (fnzb64(sz - 1) + 1); |
| 176 | 176 | ||
| 177 | /* Set heapsize to some meaningful value */ |
177 | /* Set heapsize to some meaningful value */ |
| 178 | if (maxheapsize == -1) |
178 | if (maxheapsize == (size_t) -1) |
| 179 | set_maxheapsize(MAX_HEAP_SIZE); |
179 | set_maxheapsize(MAX_HEAP_SIZE); |
| 180 | 180 | ||
| 181 | /* |
181 | /* |
| 182 | * Make sure we allocate from naturally aligned address. |
182 | * Make sure we allocate from naturally aligned address. |
| 183 | */ |
183 | */ |