tnew FreeBSD - plan9port - [fork] Plan 9 from user space
HTML git clone git://src.adamsgaard.dk/plan9port
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---
DIR commit b4d5d19438106b3904185eb9ba7d6e1b8b0cfdf7
DIR parent 2494fc9fa05582e6b9e8d96b90899ef6a5e55adb
HTML Author: rsc <devnull@localhost>
Date: Thu, 3 Nov 2005 01:00:56 +0000
new FreeBSD
Diffstat:
M src/libthread/FreeBSD-386-asm.s | 89 ++++++++++++++++---------------
M src/libthread/FreeBSD.c | 15 ---------------
2 files changed, 45 insertions(+), 59 deletions(-)
---
DIR diff --git a/src/libthread/FreeBSD-386-asm.s b/src/libthread/FreeBSD-386-asm.s
t@@ -5,50 +5,51 @@ _tas:
xchgl %eax, 0(%ecx)
ret
-.globl setmcontext
-setmcontext:
- movl 4(%esp), %edx
- movl 8(%edx), %fs
- movl 12(%edx), %es
- movl 16(%edx), %ds
- movl 76(%edx), %ss
- movl 20(%edx), %edi
- movl 24(%edx), %esi
- movl 28(%edx), %ebp
- movl %esp, %ecx
- movl 72(%edx), %esp
- pushl 60(%edx) /* eip */
- pushl 44(%edx) /* ecx */
- pushl 48(%edx) /* eax */
- movl 36(%edx), %ebx
- movl 40(%edx), %edx
- movl 12(%ecx), %eax
- popl %eax
- popl %ecx
- ret
+.globl getcontext
+getcontext:
+ movl 4(%esp), %eax
+ addl $16, %eax /* point to mcontext */
+
+ movl %fs, 8(%eax)
+ movl %es, 12(%eax)
+ movl %ds, 16(%eax)
+ movl %ss, 76(%eax)
+ movl %edi, 20(%eax)
+ movl %esi, 24(%eax)
+ movl %ebp, 28(%eax)
+ movl %ebx, 36(%eax)
+ movl %edx, 40(%eax)
+ movl %ecx, 44(%eax)
-.globl getmcontext
-getmcontext:
- pushl %edx
- movl 8(%esp), %edx
- movl %fs, 8(%edx)
- movl %es, 12(%edx)
- movl %ds, 16(%edx)
- movl %ss, 76(%edx)
- movl %edi, 20(%edx)
- movl %esi, 24(%edx)
- movl %ebp, 28(%edx)
- movl %ebx, 36(%edx)
- movl $1, 48(%edx)
- popl %eax
- movl %eax, 40(%edx)
- movl %ecx, 44(%edx)
- movl (%esp), %eax /* eip */
- movl %eax, 60(%edx)
- movl %esp, %eax
- addl $4, %eax /* setmcontext will re-push the eip */
- movl %eax, 72(%edx)
- movl 40(%edx), %edx
- xorl %eax, %eax
+ movl $1, 48(%eax) /* %eax */
+ movl (%esp), %ecx /* %eip */
+ movl %ecx, 60(%eax)
+ leal 4(%esp), %ecx /* %esp */
+ movl %ecx, 72(%eax)
+
+ movl 44(%eax), %ecx /* restore %ecx */
+ movl $0, %eax
ret
+.globl setcontext
+setcontext:
+ movl 4(%esp), %eax
+ addl $16, %eax /* point to mcontext */
+
+ movl 8(%eax), %fs
+ movl 12(%eax), %es
+ movl 16(%eax), %ds
+ movl 76(%eax), %ss
+ movl 20(%eax), %edi
+ movl 24(%eax), %esi
+ movl 28(%eax), %ebp
+ movl 36(%eax), %ebx
+ movl 40(%eax), %edx
+ movl 72(%eax), %esp
+
+ movl 60(%eax), %ecx /* push new %eip */
+ pushl %ecx
+
+ movl 44(%eax), %ecx
+ movl 48(%eax), %eax
+ ret
DIR diff --git a/src/libthread/FreeBSD.c b/src/libthread/FreeBSD.c
t@@ -18,21 +18,6 @@ makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
ucp->uc_mcontext.mc_esp = (int)sp;
}
-extern int getmcontext(mcontext_t*);
-extern int setmcontext(mcontext_t*);
-
-int
-getcontext(ucontext_t *uc)
-{
- return getmcontext(&uc->uc_mcontext);
-}
-
-void
-setcontext(ucontext_t *uc)
-{
- setmcontext(&uc->uc_mcontext);
-}
-
int
swapcontext(ucontext_t *oucp, ucontext_t *ucp)
{