Date: Fri, 31 Aug 2001 17:02:35 -0700 From: Paul Sulistio <sulistio@redback.com> To: freebsd-questions@FreeBSD.ORG Subject: Mapping register to sigcontext and jmp_buf in freebsd-uthread.c Message-ID: <3B90259B.780D15CA@redback.com>
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Hi,
How to map the registers to sigcontext and jmp_buf in freebsd-uthread.c
I need to port this feature from freebsd to netbsd.
where do these values come from?
Thanks
-Paul
------
#ifdef __i386__
static char sigmap[NUM_REGS] = /* map reg to sigcontext */
{
11, /* eax */
10, /* ecx */
9, /* edx */
8, /* ebx */
15, /* esp */
7, /* ebp */
6, /* esi */
5, /* edi */
12, /* eip */
14, /* eflags */
13, /* cs */
16, /* ss */
4, /* ds */
3, /* es */
2, /* fs */
1, /* gs */
};
static char jmpmap[NUM_REGS] = /* map reg to jmp_buf */
{
6, /* eax */
-1, /* ecx */
-1, /* edx */
1, /* ebx */
2, /* esp */
3, /* ebp */
4, /* esi */
5, /* edi */
0, /* eip */
-1, /* eflags */
-1, /* cs */
-1, /* ss */
-1, /* ds */
-1, /* es */
-1, /* fs */
-1, /* gs */
};
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