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Support aligned memory allocation
+25
+25
src/kernel/mach_server/client/mach_traps.c
+25
src/kernel/mach_server/client/mach_traps.c
···
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{
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return KERN_FAILURE;
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}
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if (mask && ( ((uintptr_t)addr) & mask) != 0)
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{
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uintptr_t boundary, q, diff, iaddr;
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// Alignment was requested, but we couldn't get it the easy way
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munmap(addr, size);
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// This may not work for some crazy masks. Consider using __builtin_clz().
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boundary = mask + 1;
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iaddr = mmap(*address, size + boundary, prot, posix_flags, -1, 0);
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if (iaddr == (uintptr_t) MAP_FAILED)
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return KERN_FAILURE;
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q = (iaddr + (boundary-1)) / boundary * boundary;
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diff = q - iaddr;
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if (diff > 0)
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munmap(iaddr, diff);
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if (boundary - diff > 0)
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munmap((void*) (q + size), boundary - diff);
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addr = (void*) q;
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}
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*address = addr;
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return KERN_SUCCESS;