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use load address from elf header if possible

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this is mostly useless for shared libs (though it could help for
prelink-like purposes); the intended use case is for adding support
for calling the dynamic linker directly to run a program, as in:
./libc.so ./a.out foo

this usage is not yet supported.
This commit is contained in:
Rich Felker 2011-06-28 14:20:41 -04:00
commit bf30100ad7
1 changed files with 1 additions and 1 deletions
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2
src/ldso/dynlink.c
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@ -189,7 +189,7 @@ static void *map_library(int fd, size_t *lenp, unsigned char **basep, size_t *dy
* the length of the file. This is okay because we will not * the length of the file. This is okay because we will not
* use the invalid part; we just need to reserve the right * use the invalid part; we just need to reserve the right
* amount of virtual address space to map over later. */ * amount of virtual address space to map over later. */
map = mmap(0, map_len, prot, MAP_PRIVATE, fd, off_start); map = mmap((void *)addr_min, map_len, prot, MAP_PRIVATE, fd, off_start);
if (map==MAP_FAILED) return 0; if (map==MAP_FAILED) return 0;
base = map - addr_min; base = map - addr_min;
ph = (void *)((char *)buf + eh->e_phoff); ph = (void *)((char *)buf + eh->e_phoff);