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start: Align the stack on s390x just in case.

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The kernel does this as required, but we cannot trust dynamic linkers to do it.
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Alex Rønne Petersen 2024-07-24 17:36:34 +02:00
parent 52653ec82b
commit ce81525f3f
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1 changed files with 2 additions and 1 deletions
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lib/std/start.zig
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@ -373,8 +373,9 @@ fn _start() callconv(.Naked) noreturn {
,
.s390x =>
// Set up the stack frame (register save area and cleared back-chain slot).
// Note: Stack pointer is guaranteed by ABI to be 8-byte aligned as required.
\\ lgr %r2, %r15
\\ lghi %r0, -16
\\ ngr %r15, %r0
\\ aghi %r15, -160
\\ lghi %r0, 0
\\ stg %r0, 0(%r15)