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Add freeAndExit() implementation for Linux/SPARCv9

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Koakuma 2021-07-30 21:45:28 +07:00 committed by Andrew Kelley
parent f6b1fa9e29
commit 7aaea20e7e
1 changed files with 26 additions and 0 deletions
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26
lib/std/Thread.zig
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@ -798,6 +798,32 @@ const LinuxThreadImpl = struct {
[len] "r" (self.mapped.len)
: "memory"
),
.sparcv9 => asm volatile (
\\ # SPARCs really don't like it when active stack frames
\\ # is unmapped (it will result in a segfault), so we
\\ # force-deactivate it by running `restore` until
\\ # all frames are cleared.
\\ 1:
\\ cmp %%sp, 0
\\ beq 2f
\\ restore
\\ ba 1f
\\ 2:
\\ mov 73, %%g1
\\ mov %[ptr], %%o0
\\ mov %[len], %%o1
\\ # Flush register window contents to prevent background
\\ # memory access before unmapping the stack.
\\ flushw
\\ t 0x6d
\\ mov 1, %%g1
\\ mov 1, %%o0
\\ t 0x6d
:
: [ptr] "r" (@ptrToInt(self.mapped.ptr)),
[len] "r" (self.mapped.len)
: "memory"
),
else => |cpu_arch| @compileError("Unsupported linux arch: " ++ @tagName(cpu_arch)),
}
unreachable;