zig

commit 8ffc41f74705246e61f3c02c253d40b1464ea2bf (tree)
parent c53673276be9de837add3a3c4e948b10cdd7e1a6
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Mon, 22 Jul 2024 13:22:42 +0200

start: Add POSIX s390x startup code.

Diffstat:
M
lib/std/start.zig
 | 
9
+++++++++

1 file changed, 9 insertions(+), 0 deletions(-)
diff --git a/lib/std/start.zig b/lib/std/start.zig
@@ -363,6 +363,15 @@ fn _start() callconv(.Naked) noreturn {
             \\ mtlr 0
             \\ b %[posixCallMainAndExit]
             ,
+            .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
+            \\ aghi %r15, -160
+            \\ lghi %r0, 0
+            \\ stg  %r0, 0(%r15)
+            \\ jg %[posixCallMainAndExit]
+            ,
             .sparc64 =>
             // argc is stored after a register window (16 registers) plus stack bias
             \\ mov %%g0, %%i6