diff options
Diffstat (limited to 'lib/std/start.zig')
| -rw-r--r-- | lib/std/start.zig | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/std/start.zig b/lib/std/start.zig index 5c94a4b591..a8109f7ed9 100644 --- a/lib/std/start.zig +++ b/lib/std/start.zig @@ -280,12 +280,14 @@ fn _start() callconv(.Naked) noreturn { \\ b %[posixCallMainAndExit] , .arm, .armeb, .thumb, .thumbeb => - \\ mov fp, #0 - \\ mov lr, #0 + // Note that this code must work for Thumb-1. + \\ movs v1, #0 + \\ mov fp, v1 + \\ mov lr, v1 \\ mov a1, sp - \\ mov ip, sp - \\ and ip, ip, #-16 - \\ mov sp, ip + \\ subs v1, #16 + \\ ands v1, a1 + \\ mov sp, v1 \\ b %[posixCallMainAndExit] , .csky => |