Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / arch / x86_64 / core / linux / linuxprefix.S

diff --git a/qemu/roms/ipxe/src/arch/x86_64/core/linux/linuxprefix.S b/qemu/roms/ipxe/src/arch/x86_64/core/linux/linuxprefix.S
new file mode 100644 (file)
index 0000000..ec8a9de
--- /dev/null
+++ b/qemu/roms/ipxe/src/arch/x86_64/core/linux/linuxprefix.S
@@ -0,0 +1,25 @@
+#include <linux/unistd.h>
+
+       .section ".text"
+       .code64
+       .globl _linux_start
+       .type _linux_start, @function
+
+_linux_start:
+       xorq    %rbp, %rbp
+
+       popq    %rdi       // argc -> C arg1
+       movq    %rsp, %rsi // argv -> C arg2
+
+       andq    $~15, %rsp // 16-byte align the stack
+
+       call    save_args
+
+       /* Our main doesn't use any arguments */
+       call    main
+
+       movq    %rax, %rdi // rc -> syscall arg1
+       movq    $__NR_exit, %rax
+       syscall
+
+       .size _linux_start, . - _linux_start