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authorPeter Maydell <peter.maydell@linaro.org>2011-04-18 16:34:24 +0100
committerRiku Voipio <riku.voipio@iki.fi>2011-06-21 20:29:01 +0300
commit00faf08c951fcc351467faac5697307a86edb077 (patch)
tree3a85f8adb1b674999861b2cee5ff658e2d41d86b /m68k-semi.c
parentf3ed1f5d476bfc18c4b2e27bf2386f54c98561f1 (diff)
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linux-user: Don't use MAP_FIXED in do_brk()
Since mmap() with MAP_FIXED will map over the top of existing mappings, it's a bad idea to use it to implement brk(), because brk() with a large size is likely to overwrite important things like qemu itself or the host libc. So we drop MAP_FIXED and handle "mapped but at different address" as an error case instead. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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