diff options
author | Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
---|---|---|
committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S')
-rw-r--r-- | qemu/roms/ipxe/src/arch/x86_64/core/linux/linux_syscall.S | 33 |
1 files changed, 33 insertions, 0 deletions
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 |