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/*-
* $FreeBSD$
*/
#include <machine/asmacros.h>
/*****************************************************************************/
/* Scheduling */
/*****************************************************************************/
.data
.text
#define TF_GS -0x04 /* don't laugh! */
#define TF_FS 0x00
#define TF_ES 0x04
#define TF_DS 0x08
#define TF_EDI 0x0c
#define TF_ESI 0x10
#define TF_EBP 0x14
#define TF_ISP 0x18
#define TF_EBX 0x1c
#define TF_EDX 0x20
#define TF_ECX 0x24
#define TF_EAX 0x28
#define TF_TRAPNO 0x2c
#define TF_ERR 0x30
#define TF_EIP 0x34
#define TF_CS 0x38
#define TF_EFLAGS 0x3c
#define TF_ESP 0x40
#define TF_SS 0x44
/*
* savethread
*/
GEN_ENTRY(savethread)
/* Switch to new thread. First, save context as needed. */
pushl %edx
movl 8(%esp), %edx /* get context area */
movl %eax,TF_EAX(%edx)
movl %ebx,TF_EBX(%edx)
movl %ecx,TF_ECX(%edx)
popl %eax /* get dx off the stack again */
movl %eax,TF_EDX(%edx)
movl (%esp),%eax /* get the return address */
movl %eax,TF_EIP(%edx)
movl %esp,TF_ESP(%edx)
movl %esp,TF_ISP(%edx) /* XXX */
movl %ebp,TF_EBP(%edx)
movl %esi,TF_ESI(%edx)
movl %edi,TF_EDI(%edx)
movl %cs,TF_CS(%edx)
movl %ds,TF_DS(%edx)
movl %es,TF_ES(%edx)
movl %fs,TF_FS(%edx)
movl %gs,TF_GS(%edx)
ret
GEN_ENTRY(loadthread)
mov 4(%esp), %edx /* get context area */
/* movl TF_ISP(%edx), %esp */ /* select which is correct */
movl TF_ESP(%edx), %esp /* get the new stack online */
movl TF_EBP(%edx), %ebp
movl TF_EIP(%edx),%eax
push %eax /* return adddress */
#if 0
movl TF_CS(%edx), %cs
movl TF_DS(%edx), %ds
movl TF_ES(%edx), %es
movl TF_FS(%edx), %fs
movl TF_GS(%edx), %gs
#endif
movl TF_ESI(%edx), %esi
movl TF_EDI(%edx), %edi
movl TF_EDX(%edx), %eax
pushl %eax
movl TF_ECX(%edx), %ecx
movl TF_EBX(%edx), %ebx
movl TF_EAX(%edx), %eax
popl %edx
ret
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