Merge pull request #1429 from shawnl/arm64

initial arm64 support 

1 files changed, 7 insertions, 5 deletions

diff --git a/std/special/bootstrap.zig b/std/special/bootstrap.zig
index 47b57c6c23..feaa04332b 100644
--- a/std/special/bootstrap.zig
+++ b/std/special/bootstrap.zig
@@ -30,6 +30,11 @@ nakedcc fn _start() noreturn {
                 : [argc] "=r" (-> [*]usize)
             );
         },
+        builtin.Arch.aarch64v8 => {
+            argc_ptr = asm ("mov %[argc], sp"
+                : [argc] "=r" (-> [*]usize)
+            );
+        },
         else => @compileError("unsupported arch"),
     }
     // If LLVM inlines stack variables into _start, they will overwrite
@@ -54,11 +59,8 @@ fn posixCallMainAndExit() noreturn {
     const envp = @ptrCast([*][*]u8, envp_optional)[0..envp_count];
     if (builtin.os == builtin.Os.linux) {
         const auxv = @ptrCast([*]usize, envp.ptr + envp_count + 1);
-        var i: usize = 0;
-        while (auxv[i] != 0) : (i += 2) {
-            if (auxv[i] < std.os.linux_aux_raw.len) std.os.linux_aux_raw[auxv[i]] = auxv[i + 1];
-        }
-        std.debug.assert(std.os.linux_aux_raw[std.elf.AT_PAGESZ] == std.os.page_size);
+        std.os.linux_elf_aux_maybe = @ptrCast([*]std.elf.Auxv, auxv);
+        std.debug.assert(std.os.linuxGetAuxVal(std.elf.AT_PAGESZ) == std.os.page_size);
     }
 
     std.os.posix.exit(callMainWithArgs(argc, argv, envp));