__attribute__((constructor))
static void ginge_init(void)
{
- unsigned int lowest_segment = (unsigned int)-1;
+ void *lowest_segments[2] = { NULL, NULL };
unsigned int start, end;
int i, ret;
FILE *f;
perror("parse maps");
exit(1);
}
- lowest_segment = start;
-
- // assume first entry lists program's text section.
- // unprotect it in case we need some patching.
- ret = mprotect((void *)start, end - start, PROT_READ|PROT_WRITE|PROT_EXEC);
- if (ret != 0)
- perror("warning: mprotect");
+ lowest_segments[0] = (void *)start;
while (1) {
next_line(f);
if (ret <= 0)
break;
- if (start < lowest_segment)
- lowest_segment = start;
+ if (lowest_segments[0] == NULL || (void *)start < lowest_segments[0])
+ lowest_segments[0] = (void *)start;
+ else if (lowest_segments[1] == NULL
+ && (char *)start - (char *)lowest_segments[0] > 0x800000)
+ {
+ // an offset is needed because ld-linux also
+ // tends to put stuff here
+ lowest_segments[1] = (void *)(start - 0x20000);
+ }
}
#if 0
unsetenv("LD_PRELOAD");
unsetenv("LD_LIBRARY_PATH");
- emu_init((void *)lowest_segment);
+ emu_init(lowest_segments, 1);
}
// vim:shiftwidth=2:expandtab