/*
* Set machine context.
*
* However, we don't set any but the user modifiable flags, and we won't
* touch the cs selector.
*/
static int
ia32_set_mcontext(struct thread *td, const struct ia32_mcontext *mcp)
{
struct trapframe *tp;
long rflags;
int ret;
tp = td->td_frame;
if (mcp->mc_len != sizeof(*mcp))
return (EINVAL);
rflags = (mcp->mc_eflags & PSL_USERCHANGE) |
(tp->tf_rflags & ~PSL_USERCHANGE);
ret = ia32_set_fpcontext(td, mcp);
if (ret != 0)
return (ret);
tp->tf_gs = mcp->mc_gs;
tp->tf_fs = mcp->mc_fs;
tp->tf_es = mcp->mc_es;
tp->tf_ds = mcp->mc_ds;
tp->tf_flags = TF_HASSEGS;
tp->tf_rdi = mcp->mc_edi;
tp->tf_rsi = mcp->mc_esi;
tp->tf_rbp = mcp->mc_ebp;
tp->tf_rbx = mcp->mc_ebx;
tp->tf_rdx = mcp->mc_edx;
tp->tf_rcx = mcp->mc_ecx;
tp->tf_rax = mcp->mc_eax;
/* trapno, err */
tp->tf_rip = mcp->mc_eip;
tp->tf_rflags = rflags;
tp->tf_rsp = mcp->mc_esp;
tp->tf_ss = mcp->mc_ss;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
return (0);
}
/*
* Set machine context.
*
* However, we don't set any but the user modifiable flags, and we won't
* touch the cs selector.
*/
static int
ia32_set_mcontext(struct thread *td, const struct ia32_mcontext *mcp)
{
struct trapframe *tp;
char *xfpustate;
long rflags;
int ret;
tp = td->td_frame;
if (mcp->mc_len != sizeof(*mcp))
return (EINVAL);
rflags = (mcp->mc_eflags & PSL_USERCHANGE) |
(tp->tf_rflags & ~PSL_USERCHANGE);
if (mcp->mc_flags & _MC_IA32_HASFPXSTATE) {
if (mcp->mc_xfpustate_len > cpu_max_ext_state_size -
sizeof(struct savefpu))
return (EINVAL);
xfpustate = __builtin_alloca(mcp->mc_xfpustate_len);
ret = copyin(PTRIN(mcp->mc_xfpustate), xfpustate,
mcp->mc_xfpustate_len);
if (ret != 0)
return (ret);
} else
xfpustate = NULL;
ret = ia32_set_fpcontext(td, mcp, xfpustate, mcp->mc_xfpustate_len);
if (ret != 0)
return (ret);
tp->tf_gs = mcp->mc_gs;
tp->tf_fs = mcp->mc_fs;
tp->tf_es = mcp->mc_es;
tp->tf_ds = mcp->mc_ds;
tp->tf_flags = TF_HASSEGS;
tp->tf_rdi = mcp->mc_edi;
tp->tf_rsi = mcp->mc_esi;
tp->tf_rbp = mcp->mc_ebp;
tp->tf_rbx = mcp->mc_ebx;
tp->tf_rdx = mcp->mc_edx;
tp->tf_rcx = mcp->mc_ecx;
tp->tf_rax = mcp->mc_eax;
/* trapno, err */
tp->tf_rip = mcp->mc_eip;
tp->tf_rflags = rflags;
tp->tf_rsp = mcp->mc_esp;
tp->tf_ss = mcp->mc_ss;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
return (0);
}
