From bb5b66b8878d48c505fe1a653d5a59e21d3d9380 Mon Sep 17 00:00:00 2001 From: Piotr Jaroszyński Date: Wed, 9 Jun 2010 19:55:09 +0200 Subject: [linux] Add linuxprefix Add a minimal _start required to run main. Signed-off-by: Piotr Jaroszyński Signed-off-by: Michael Brown --- src/arch/x86_64/prefix/linuxprefix.S | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 src/arch/x86_64/prefix/linuxprefix.S (limited to 'src/arch/x86_64') diff --git a/src/arch/x86_64/prefix/linuxprefix.S b/src/arch/x86_64/prefix/linuxprefix.S new file mode 100644 index 000000000..20163b8a4 --- /dev/null +++ b/src/arch/x86_64/prefix/linuxprefix.S @@ -0,0 +1,22 @@ +#include + + .section ".text" + .code64 + .globl _start + .type _start, @function + +_start: + xorq %rbp, %rbp + + popq %rdi // argc -> C arg1 + movq %rsp, %rsi // argv -> C arg2 + + andq $~15, %rsp // 16-byte align the stack + + call main + + movq %rax, %rdi // rc -> syscall arg1 + movq $__NR_exit, %rax + syscall + + .size _start, . - _start -- cgit v1.2.3-55-g7522