zig

commit 375bb5f4a1ebfc1d002e252d97077da7e1db7e4d (tree)
parent 67ee68fc9eb02b78d7a2c26c617a16f60f91012d
Author: Koakuma <koachan@protonmail.com>
Date:   Sun, 17 Sep 2023 19:18:59 +0700

lib: Fix asm code in _start for SPARC

SPARCs have delayed branches, that is, it will unconditionally
run the next instruction following a branch.
Slightly reorder the _start code sequence to prevent it from
accidentally executing stray instructions, which may result in odd
program behavior.

Diffstat:
M
lib/std/start.zig
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/std/start.zig b/lib/std/start.zig
@@ -327,8 +327,8 @@ fn _start() callconv(.Naked) noreturn {
             // argc is stored after a register window (16 registers) plus stack bias
             \\ mov %%g0, %%i6
             \\ add %%o6, 2175, %%l0
-            \\ stx %%l0, %[argc_argv_ptr]
             \\ ba %[posixCallMainAndExit]
+            \\  stx %%l0, %[argc_argv_ptr]
             ,
             else => @compileError("unsupported arch"),
         }