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std.start: align stack pointer according to ARC v3 ABI

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Alex Rønne Petersen 2025-10-18 15:01:15 +02:00
parent 0d2d51dd8c
commit 2d5cdfcfc2
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1 changed files with 2 additions and 3 deletions
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lib/std/start.zig
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@ -253,12 +253,11 @@ fn _start() callconv(.naked) noreturn {
\\ b %[posixCallMainAndExit]
,
.arc =>
// The `arc` tag currently means ARC v1 and v2, which have an unusually low stack
// alignment requirement. ARC v3 increases it from 4 to 16, but we don't support v3 yet.
// ARC v1 and v2 had a very low stack alignment requirement of 4; v3 increased it to 16.
\\ mov fp, 0
\\ mov blink, 0
\\ mov r0, sp
\\ and sp, sp, -4
\\ and sp, sp, -16
\\ b %[posixCallMainAndExit]
,
.arm, .armeb, .thumb, .thumbeb =>