runtime: fix syscall error returns on mips/mips64/ppc64
The linux syscall functions used in runtime are designed around the calling convention of returning errors as negative numbers. On some other systems (like mips and ppc) the actual syscalls signal errors in other ways. This means that the assembly implementations of the syscall functions on these platforms need to transform the return values in the error cases to match the expected negative errno values. This was addressed for certain syscalls in https://golang.org/cl/19455 and https://golang.org/cl/89235. This patch handles the rest of the syscall functions in sys_linux_*.s that return any value for mips/mips64/ppc64. Fixes #23446 Change-Id: I302100261231f76d5850ab2c2ea080170d7dba72 GitHub-Last-Rev: e358e2b08c76897b13f917cfa12b5085e20337f9 GitHub-Pull-Request: golang/go#26606 Reviewed-on: https://go-review.googlesource.com/125895 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Ian Lance Taylor <iant@golang.org>
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