Commit 073d8e55c321db585d71534a94124100582860f7 | zig

author	Benjamin Feng <benjamin.feng@glassdoor.com> 2021-04-10 12:58:21-05:00
committer	Benjamin Feng <benjamin.feng@glassdoor.com> 2021-04-10 22:47:22-05:00
log	073d8e55c321db585d71534a94124100582860f7
tree	350640dc8429708345367dc17fbce65ad08d26c5
parent	2e85eb2bf8f0e7292a73c58e8f4d04666e4a6be7

1 files changed, 6 insertions(+), 3 deletions(-)

lib/std/start.zig+6-3

 @@ -198,13 +198,16 @@ fn _start() callconv(.Naked) noreturn {
             );
         },
         .powerpc => {
+            // Setup the initial stack frame and clear the back chain pointer.
             argc_argv_ptr = asm volatile (
-                \\ mr 3, 1
+                \\ mr 4, 1
                 \\ li 0, 0
+                \\ stwu 1,-16(1)
+                \\ stw 0, 0(1)
                 \\ mtlr 0
-                : [argc] "={r3}" (-> [*]usize)
+                : [argc] "={r4}" (-> [*]usize)
                 :
-                : "r0", "r3"
+                : "r0"
             );
         },
         .powerpc64le => {