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start: Add a comment explaining the sparc64 stack bias.

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Alex Rønne Petersen 2024-07-24 17:36:15 +02:00
parent 5c96192c19
commit 58e38ff1f8
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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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@ -379,7 +379,8 @@ fn _start() callconv(.Naked) noreturn {
\\ jg %[posixCallMainAndExit]
,
.sparc64 =>
// argc is stored after a register window (16 registers) plus stack bias
// argc is stored after a register window (16 registers * 8 bytes) plus the stack bias
// (2047 bytes).
\\ mov %%g0, %%i6
\\ add %%o6, 2175, %%l0
\\ mov %%l0, %%o0