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c98af78c58
This patch fixes the problem with SSE (xmm) registers corruption on amd64 architecture. The problem was that gcc generates parasite blob that uses xmm registers, but we don't preserve this registers in CRIU when injecting parasite. Also, gcc, even with -nostdlib option uses builtin memcpy, memset functions that optimized for amd64 and involves SSE registers. It seems, that optimal solution is to use -ffreestanding gcc option to compile parasite. This option implies -fno-builtin and also it designed for OS kernels compilation/another code that suited to work on non-hosted environments and could prevent future sumilar bugs. To check that you amd64 CRIU build affected by this problem you could simply objdump -dS criu/pie/parasite.o | grep xmm Output should be empty. Reported-by: Diyu Zhou <zhoudiyupku at gmail.com> Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com> Signed-off-by: Alexander Mikhalitsyn <alexander@mihalicyn.com> |
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