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<machine/mcontext.h>

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Change-Id: I2ad64018f3f402e7ccc5c4dc037dd0a3fe56a929
This commit is contained in:
Ben Gras
2013-12-10 14:55:46 +01:00
committed by Lionel Sambuc
parent 17587738d3
commit 5cecdfcb3e
8 changed files with 377 additions and 85 deletions
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19
kernel/system/do_mcontext.c
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@@ -10,6 +10,7 @@
#include "kernel/system.h"
#include <string.h>
#include <assert.h>
#include <machine/mcontext.h>
#if USE_MCONTEXT
@@ -35,17 +36,18 @@ int do_getmcontext(struct proc * caller, message * m_ptr)
/* Get the mcontext structure into our address space. */
if ((r = data_copy(m_ptr->PR_ENDPT, (vir_bytes) m_ptr->PR_CTX_PTR, KERNEL,
(vir_bytes) &mc, (phys_bytes) sizeof(struct __mcontext))) != OK)
(vir_bytes) &mc, (phys_bytes) sizeof(mcontext_t))) != OK)
return(r);
mc.mc_flags = 0;
#if defined(__i386__)
/* Copy FPU state */
mc.mc_fpu_flags = 0;
if (proc_used_fpu(rp)) {
/* make sure that the FPU context is saved into proc structure first */
save_fpu(rp);
mc.mc_fpu_flags = rp->p_misc_flags & MF_FPU_INITIALIZED;
memcpy(&(mc.mc_fpu_state), rp->p_seg.fpu_state, FPU_XFP_SIZE);
mc.mc_flags = (rp->p_misc_flags & MF_FPU_INITIALIZED) ? _MC_FPU_SAVED : 0;
assert(sizeof(mc.__fpregs.__fp_reg_set) == FPU_XFP_SIZE);
memcpy(&(mc.__fpregs.__fp_reg_set), rp->p_seg.fpu_state, FPU_XFP_SIZE);
}
#endif
@@ -53,7 +55,7 @@ int do_getmcontext(struct proc * caller, message * m_ptr)
/* Copy the mcontext structure to the user's address space. */
if ((r = data_copy(KERNEL, (vir_bytes) &mc, m_ptr->PR_ENDPT,
(vir_bytes) m_ptr->PR_CTX_PTR,
(phys_bytes) sizeof(struct __mcontext))) != OK)
(phys_bytes) sizeof(mcontext_t))) != OK)
return(r);
return(OK);
@@ -76,14 +78,15 @@ int do_setmcontext(struct proc * caller, message * m_ptr)
/* Get the mcontext structure into our address space. */
if ((r = data_copy(m_ptr->PR_ENDPT, (vir_bytes) m_ptr->PR_CTX_PTR, KERNEL,
(vir_bytes) &mc, (phys_bytes) sizeof(struct __mcontext))) != OK)
(vir_bytes) &mc, (phys_bytes) sizeof(mcontext_t))) != OK)
return(r);
#if defined(__i386__)
/* Copy FPU state */
if (mc.mc_fpu_flags & MF_FPU_INITIALIZED) {
if (mc.mc_flags & _MC_FPU_SAVED) {
rp->p_misc_flags |= MF_FPU_INITIALIZED;
memcpy(rp->p_seg.fpu_state, &(mc.mc_fpu_state), FPU_XFP_SIZE);
assert(sizeof(mc.__fpregs.__fp_reg_set) == FPU_XFP_SIZE);
memcpy(rp->p_seg.fpu_state, &(mc.__fpregs.__fp_reg_set), FPU_XFP_SIZE);
} else
rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
/* force reloading FPU in either case */