Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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File size:
871 bytes
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1 | #include <stdint.h>
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2 |
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3 | __attribute__((__visibility__("hidden")))
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4 | void *__fdpic_fixup(void *map, uintptr_t *a, uintptr_t *z)
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5 | {
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6 | /* If map is a null pointer, the program was loaded by a
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7 | * non-FDPIC-aware ELF loader, and fixups are not needed,
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8 | * but the value for the GOT pointer is. */
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9 | if (!map) return (void *)z[-1];
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10 |
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11 | struct {
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12 | unsigned short version, nsegs;
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13 | struct fdpic_loadseg {
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14 | uintptr_t addr, p_vaddr, p_memsz;
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15 | } segs[];
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16 | } *lm = map;
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17 | int nsegs = lm->nsegs, rseg = 0, vseg = 0;
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18 | for (;;) {
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19 | while (*a-lm->segs[rseg].p_vaddr >= lm->segs[rseg].p_memsz)
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20 | if (++rseg == nsegs) rseg = 0;
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21 | uintptr_t *r = (uintptr_t *)
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22 | (*a + lm->segs[rseg].addr - lm->segs[rseg].p_vaddr);
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23 | if (++a == z) return r;
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24 | while (*r-lm->segs[vseg].p_vaddr >= lm->segs[vseg].p_memsz)
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25 | if (++vseg == nsegs) vseg = 0;
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26 | *r += lm->segs[vseg].addr - lm->segs[vseg].p_vaddr;
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27 | }
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28 | }
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