tmore freebsd work - plan9port - [fork] Plan 9 from user space
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---
(DIR) commit d54ead7fb922cfa661c7b7f0d0b2ba1251cdea7f
(DIR) parent 9cb22ba60776e22568798b40560543ddf6c8ed2c
(HTM) Author: rsc <devnull@localhost>
Date: Tue, 28 Dec 2004 04:20:39 +0000
more freebsd work
Diffstat:
M src/libthread/FreeBSD.c | 49 +++++++++++++++++++++++++------
A src/libthread/FreeBSDasm.s | 54 +++++++++++++++++++++++++++++++
M src/libthread/Linux.c | 8 --------
M src/libthread/channel.c | 3 ---
M src/libthread/daemonize.c | 13 +++++--------
M src/libthread/exec.c | 4 ----
M src/libthread/mkfile | 2 ++
M src/libthread/pthread.c | 4 ----
M src/libthread/thread.c | 5 +----
M src/libthread/threadimpl.h | 16 ++++++++++++++++
10 files changed, 118 insertions(+), 40 deletions(-)
---
(DIR) diff --git a/src/libthread/FreeBSD.c b/src/libthread/FreeBSD.c
t@@ -1,11 +1,3 @@
-#include "u.h"
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sched.h>
-#include <signal.h>
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
extern int __isthreaded;
t@@ -70,7 +62,6 @@ _spinlock(spinlock_t *lk)
{
lock((Lock*)&lk->access_lock);
}
- __isthreaded = 1;
/*
* sleep and wakeup
t@@ -351,6 +342,46 @@ _threadsetproc(Proc *p)
void
_pthreadinit(void)
{
+ __isthreaded = 1;
signal(SIGUSR2, sigusr2handler);
}
+/*
+ * FreeBSD 4 and earlier needs the context functions.
+ */
+void
+makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
+{
+ int *sp;
+
+ sp = (int*)ucp->uc_stack.ss_sp+ucp->uc_stack.ss_size/4;
+ sp -= argc;
+ memmove(sp, &argc+1, argc*sizeof(int));
+ *--sp = 0; /* return address */
+ ucp->uc_mcontext.mc_eip = (long)func;
+ 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)
+{
+ if(getcontext(oucp) == 0)
+ setcontext(ucp);
+ return 0;
+}
+
(DIR) diff --git a/src/libthread/FreeBSDasm.s b/src/libthread/FreeBSDasm.s
t@@ -0,0 +1,54 @@
+.globl _tas
+_tas:
+ movl $0xCAFEBABE, %eax
+ movl 4(%esp), %ecx
+ 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 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
+ ret
+
(DIR) diff --git a/src/libthread/Linux.c b/src/libthread/Linux.c
t@@ -1,11 +1,3 @@
-#include "u.h"
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sched.h>
-#include <signal.h>
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
/*
(DIR) diff --git a/src/libthread/channel.c b/src/libthread/channel.c
t@@ -1,6 +1,3 @@
-#include "u.h"
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
/*
(DIR) diff --git a/src/libthread/daemonize.c b/src/libthread/daemonize.c
t@@ -1,8 +1,3 @@
-#include <u.h>
-#include <sys/signal.h>
-#include <sys/wait.h>
-#include <libc.h>
-#include <thread.h>
#include "threadimpl.h"
#undef pipe
t@@ -15,8 +10,10 @@ static void
child(void)
{
int status;
- if(wait(&status) == sigpid && WIFEXITED(status))
- _exit(WEXITSTATUS(status));
+ if(wait(&status) == sigpid)
+ if(WIFEXITED(status))
+ _exit(WEXITSTATUS(status));
+ _exit(97);
}
static void
t@@ -83,7 +80,7 @@ _threadsetupdaemonize(void)
child();
if(n > 0)
break;
- sysfatal("passer pipe read: %r");
+ print("passer read: %r\n");
}
buf[n] = 0;
_exit(atoi(buf));
(DIR) diff --git a/src/libthread/exec.c b/src/libthread/exec.c
t@@ -1,7 +1,3 @@
-#include "u.h"
-#include <errno.h>
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
static Lock thewaitlock;
(DIR) diff --git a/src/libthread/mkfile b/src/libthread/mkfile
t@@ -39,3 +39,5 @@ test:V: tprimes tspawn
CLEANFILES=p1.txt p2.txt tp1.txt tp2.txt
+
+
(DIR) diff --git a/src/libthread/pthread.c b/src/libthread/pthread.c
t@@ -1,7 +1,3 @@
-#include "u.h"
-#include <errno.h>
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
static pthread_mutex_t initmutex = PTHREAD_MUTEX_INITIALIZER;
(DIR) diff --git a/src/libthread/thread.c b/src/libthread/thread.c
t@@ -1,6 +1,3 @@
-#include "u.h"
-#include "libc.h"
-#include "thread.h"
#include "threadimpl.h"
int _threaddebuglevel;
t@@ -95,7 +92,7 @@ threadalloc(void (*fn)(void*), void *arg, uint stack)
sigemptyset(&zero);
sigprocmask(SIG_BLOCK, &zero, &t->context.uc.uc_sigmask);
- /* on Linux makecontext neglects floating point */
+ /* must initialize with current context */
getcontext(&t->context.uc);
/* call makecontext to do the real work. */
(DIR) diff --git a/src/libthread/threadimpl.h b/src/libthread/threadimpl.h
t@@ -1,4 +1,20 @@
+#include "u.h"
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sched.h>
+#include <signal.h>
#include <ucontext.h>
+#include "libc.h"
+#include "thread.h"
+
+#if defined(__FreeBSD__) && !defined(__FreeBSD5__)
+extern int getcontext(ucontext_t*);
+extern void setcontext(ucontext_t*);
+extern int swapcontext(ucontext_t*, ucontext_t*);
+extern void makecontext(ucontext_t*, void(*)(), int, ...);
+#endif
typedef struct Context Context;
typedef struct Execjob Execjob;