x86_64: assertion failure assembling out with an immediate port #25547
Description
Zig Version
0.15.1
Steps to Reproduce and Observed Behavior
run zig build-exe -ofmt=elf -ODebug -target x86_64-freestanding-none main.zig with following main.zig
fn debug_out(string: []const u8) void {
for (string) |char| {
asm volatile (
\\ outb %[char], $0xe9;
:
: [char] "{al}" (char),
);
}
}
export fn _start() noreturn {
debug_out("Hello kernel!\n");
unreachable;
}
Receive segmentation fault
[user@aphrodite kernel]$ zig build-exe -ofmt=elf -ODebug -target x86_64-freestanding-none main.zig
Segmentation fault (core dumped) zig build-exe -ofmt=elf -ODebug -target x86_64-freestanding-none main.zig
Expected Behavior
Successful compilation, such as with -fllvm, or -OReleaseFast