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authorRich Felker <dalias@aerifal.cx>2016-04-25 19:37:06 -0400
committerRich Felker <dalias@aerifal.cx>2016-04-25 19:37:06 -0400
commitbe999f7a54e81656ea0409030205177327a7450c (patch)
tree0468c4862b449a48c28c3b2e3441f65b213a0c76 /VERSION
parente7d05c7894aa15ea6decdeca481ffed3f14cb521 (diff)
downloadmusl-be999f7a54e81656ea0409030205177327a7450c.tar.gz
fix thread structure/dtv-pointer corruption on powerpc
per the powerpc psabi, offset 4 of the stack at call time belongs to the callee and is used for spilling lr (return address). in addition, offset 0 on the stack must contain a pointer to the previous stack frame, or a null pointer for the initial stack frame of a thread. __clone failed to setup any stack frame on the new thread's stack, thereby allowing the start function it called to clobber offset 4 of the new thread's struct __pthread, which contains the dtv pointer. add code to setup a proper stack frame and align the stack pointer to a multiple of 16 (also an abi requirement) if it was not already aligned.
Diffstat (limited to 'VERSION')
0 files changed, 0 insertions, 0 deletions