From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- .../src/arch/x86_64/core/linux/linux_syscall.S | 33 ++++++++++++++++++++++ .../ipxe/src/arch/x86_64/core/linux/linuxprefix.S | 25 ++++++++++++++++ 2 files changed, 58 insertions(+) create mode 100644 qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S create mode 100644 qemu/roms/ipxe/src/arch/x86_64/core/linux/linuxprefix.S (limited to 'qemu/roms/ipxe/src/arch/x86_64/core') diff --git a/qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S b/qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S new file mode 100644 index 000000000..d2805f94c --- /dev/null +++ b/qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S @@ -0,0 +1,33 @@ + + .section ".data" + .globl linux_errno + +linux_errno: .int 0 + + .section ".text" + .code64 + .globl linux_syscall + .type linux_syscall, @function + +linux_syscall: + movq %rdi, %rax // C arg1 -> syscall number + movq %rsi, %rdi // C arg2 -> syscall arg1 + movq %rdx, %rsi // C arg3 -> syscall arg2 + movq %rcx, %rdx // C arg4 -> syscall arg3 + movq %r8, %r10 // C arg5 -> syscall arg4 + movq %r9, %r8 // C arg6 -> syscall arg5 + movq 8(%rsp), %r9 // C arg7 -> syscall arg6 + + syscall + + cmpq $-4095, %rax + jae 1f + ret + +1: + negq %rax + movl %eax, linux_errno + movq $-1, %rax + ret + + .size linux_syscall, . - linux_syscall 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 index 000000000..ec8a9decd --- /dev/null +++ b/qemu/roms/ipxe/src/arch/x86_64/core/linux/linuxprefix.S @@ -0,0 +1,25 @@ +#include + + .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 -- cgit 1.2.3-korg