3e7abf82e3
This change enables buildmode c-shared on ppc64le. A bug was fixed in runtime/rt0_linux_ppc64le.s that was necessary to make this work. In _rt0_ppc64le_linux_lib, there is code to store the value of r2 onto the caller's stack. However, if this file is compiled using a build mode that maintains the TOC address in r2, then instructions will be inserted at the beginning of this function to generate the r2 value for the callee, not the caller. That means the r2 value for the callee is stored onto the caller's stack. If caller and callee don't have the same r2 values, then the caller will restore the wrong r2 value after it returns. This situation can happen when using dlopen since the caller of this function will be in ld64.so and will definitely have a different TOC. Updates #20756 Change-Id: I6e165e0d0716e73721bbbcc520e8302e4856e3ba Reviewed-on: https://go-review.googlesource.com/53890 Reviewed-by: Ian Lance Taylor <iant@golang.org> |
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