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-rw-r--r--arch/um/drivers/Makefile6
-rw-r--r--arch/um/drivers/slip.h23
-rw-r--r--arch/um/drivers/slip_common.c54
-rw-r--r--arch/um/drivers/slip_common.h (renamed from arch/um/drivers/slip_proto.h)44
-rw-r--r--arch/um/drivers/slip_kern.c12
-rw-r--r--arch/um/drivers/slip_user.c152
-rw-r--r--arch/um/drivers/slirp.h26
-rw-r--r--arch/um/drivers/slirp_kern.c5
-rw-r--r--arch/um/drivers/slirp_user.c104
-rw-r--r--arch/um/include/sysdep-i386/ptrace.h5
-rw-r--r--arch/um/kernel/main.c2
-rw-r--r--arch/um/kernel/process.c49
-rw-r--r--arch/um/kernel/um_arch.c1
-rw-r--r--arch/um/scripts/Makefile.rules2
14 files changed, 203 insertions, 282 deletions
diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
index 323f72c64cd..b2de9916c32 100644
--- a/arch/um/drivers/Makefile
+++ b/arch/um/drivers/Makefile
@@ -22,8 +22,8 @@ obj-y := stdio_console.o fd.o chan_kern.o chan_user.o line.o
obj-$(CONFIG_SSL) += ssl.o
obj-$(CONFIG_STDERR_CONSOLE) += stderr_console.o
-obj-$(CONFIG_UML_NET_SLIP) += slip.o
-obj-$(CONFIG_UML_NET_SLIRP) += slirp.o
+obj-$(CONFIG_UML_NET_SLIP) += slip.o slip_common.o
+obj-$(CONFIG_UML_NET_SLIRP) += slirp.o slip_common.o
obj-$(CONFIG_UML_NET_DAEMON) += daemon.o
obj-$(CONFIG_UML_NET_MCAST) += mcast.o
#obj-$(CONFIG_UML_NET_PCAP) += pcap.o $(PCAP)
@@ -41,6 +41,6 @@ obj-$(CONFIG_UML_WATCHDOG) += harddog.o
obj-$(CONFIG_BLK_DEV_COW_COMMON) += cow_user.o
obj-$(CONFIG_UML_RANDOM) += random.o
-USER_OBJS := fd.o null.o pty.o tty.o xterm.o
+USER_OBJS := fd.o null.o pty.o tty.o xterm.o slip_common.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/drivers/slip.h b/arch/um/drivers/slip.h
index d523618cd5a..bb0dab41c2e 100644
--- a/arch/um/drivers/slip.h
+++ b/arch/um/drivers/slip.h
@@ -1,10 +1,7 @@
#ifndef __UM_SLIP_H
#define __UM_SLIP_H
-#define BUF_SIZE 1500
- /* two bytes each for a (pathological) max packet of escaped chars + *
- * terminating END char + initial END char */
-#define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
+#include "slip_common.h"
struct slip_data {
void *dev;
@@ -12,28 +9,12 @@ struct slip_data {
char *addr;
char *gate_addr;
int slave;
- unsigned char ibuf[ENC_BUF_SIZE];
- unsigned char obuf[ENC_BUF_SIZE];
- int more; /* more data: do not read fd until ibuf has been drained */
- int pos;
- int esc;
+ struct slip_proto slip;
};
extern struct net_user_info slip_user_info;
-extern int set_umn_addr(int fd, char *addr, char *ptp_addr);
extern int slip_user_read(int fd, void *buf, int len, struct slip_data *pri);
extern int slip_user_write(int fd, void *buf, int len, struct slip_data *pri);
#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/slip_common.c b/arch/um/drivers/slip_common.c
new file mode 100644
index 00000000000..e89cfc68fc3
--- /dev/null
+++ b/arch/um/drivers/slip_common.c
@@ -0,0 +1,54 @@
+#include <string.h>
+#include "slip_common.h"
+#include "net_user.h"
+
+int slip_proto_read(int fd, void *buf, int len, struct slip_proto *slip)
+{
+ int i, n, size, start;
+
+ if(slip->more > 0){
+ i = 0;
+ while(i < slip->more){
+ size = slip_unesc(slip->ibuf[i++], slip->ibuf,
+ &slip->pos, &slip->esc);
+ if(size){
+ memcpy(buf, slip->ibuf, size);
+ memmove(slip->ibuf, &slip->ibuf[i],
+ slip->more - i);
+ slip->more = slip->more - i;
+ return size;
+ }
+ }
+ slip->more = 0;
+ }
+
+ n = net_read(fd, &slip->ibuf[slip->pos],
+ sizeof(slip->ibuf) - slip->pos);
+ if(n <= 0)
+ return n;
+
+ start = slip->pos;
+ for(i = 0; i < n; i++){
+ size = slip_unesc(slip->ibuf[start + i], slip->ibuf,&slip->pos,
+ &slip->esc);
+ if(size){
+ memcpy(buf, slip->ibuf, size);
+ memmove(slip->ibuf, &slip->ibuf[start+i+1],
+ n - (i + 1));
+ slip->more = n - (i + 1);
+ return size;
+ }
+ }
+ return 0;
+}
+
+int slip_proto_write(int fd, void *buf, int len, struct slip_proto *slip)
+{
+ int actual, n;
+
+ actual = slip_esc(buf, slip->obuf, len);
+ n = net_write(fd, slip->obuf, actual);
+ if(n < 0)
+ return n;
+ else return len;
+}
diff --git a/arch/um/drivers/slip_proto.h b/arch/um/drivers/slip_common.h
index 4c4d94a3310..2ae76d8f1be 100644
--- a/arch/um/drivers/slip_proto.h
+++ b/arch/um/drivers/slip_common.h
@@ -1,10 +1,10 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
+#ifndef __UM_SLIP_COMMON_H
+#define __UM_SLIP_COMMON_H
-#ifndef __UM_SLIP_PROTO_H__
-#define __UM_SLIP_PROTO_H__
+#define BUF_SIZE 1500
+ /* two bytes each for a (pathological) max packet of escaped chars + *
+ * terminating END char + initial END char */
+#define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
/* SLIP protocol characters. */
#define SLIP_END 0300 /* indicates end of frame */
@@ -80,15 +80,25 @@ static inline int slip_esc(unsigned char *s, unsigned char *d, int len)
return (ptr - d);
}
-#endif
+struct slip_proto {
+ unsigned char ibuf[ENC_BUF_SIZE];
+ unsigned char obuf[ENC_BUF_SIZE];
+ int more; /* more data: do not read fd until ibuf has been drained */
+ int pos;
+ int esc;
+};
+
+#define SLIP_PROTO_INIT { \
+ .ibuf = { '\0' }, \
+ .obuf = { '\0' }, \
+ .more = 0, \
+ .pos = 0, \
+ .esc = 0 \
+}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+extern int slip_proto_read(int fd, void *buf, int len,
+ struct slip_proto *slip);
+extern int slip_proto_write(int fd, void *buf, int len,
+ struct slip_proto *slip);
+
+#endif
diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c
index 0886eedba21..9a6f5c85f90 100644
--- a/arch/um/drivers/slip_kern.c
+++ b/arch/um/drivers/slip_kern.c
@@ -26,16 +26,16 @@ void slip_init(struct net_device *dev, void *data)
.addr = NULL,
.gate_addr = init->gate_addr,
.slave = -1,
- .ibuf = { '\0' },
- .obuf = { '\0' },
- .pos = 0,
- .esc = 0,
+ .slip = SLIP_PROTO_INIT,
.dev = dev });
dev->init = NULL;
+ dev->header_cache_update = NULL;
+ dev->hard_header_cache = NULL;
+ dev->hard_header = NULL;
dev->hard_header_len = 0;
- dev->addr_len = 4;
- dev->type = ARPHRD_ETHER;
+ dev->addr_len = 0;
+ dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 256;
dev->flags = IFF_NOARP;
printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index d94846b1b4c..71af444e591 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -13,7 +13,7 @@
#include "user.h"
#include "net_user.h"
#include "slip.h"
-#include "slip_proto.h"
+#include "slip_common.h"
#include "helper.h"
#include "os.h"
@@ -77,41 +77,51 @@ static int slip_tramp(char **argv, int fd)
err = os_pipe(fds, 1, 0);
if(err < 0){
printk("slip_tramp : pipe failed, err = %d\n", -err);
- return(err);
+ goto out;
}
err = 0;
pe_data.stdin = fd;
pe_data.stdout = fds[1];
pe_data.close_me = fds[0];
- pid = run_helper(slip_pre_exec, &pe_data, argv, NULL);
+ err = run_helper(slip_pre_exec, &pe_data, argv, NULL);
+ if(err < 0)
+ goto out_close;
+ pid = err;
+
+ output_len = page_size();
+ output = um_kmalloc(output_len);
+ if(output == NULL){
+ printk("slip_tramp : failed to allocate output buffer\n");
+ os_kill_process(pid, 1);
+ err = -ENOMEM;
+ goto out_free;
+ }
- if(pid < 0) err = pid;
- else {
- output_len = page_size();
- output = um_kmalloc(output_len);
- if(output == NULL)
- printk("slip_tramp : failed to allocate output "
- "buffer\n");
-
- os_close_file(fds[1]);
- read_output(fds[0], output, output_len);
- if(output != NULL){
- printk("%s", output);
- kfree(output);
- }
- CATCH_EINTR(err = waitpid(pid, &status, 0));
- if(err < 0)
- err = errno;
- else if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0)){
- printk("'%s' didn't exit with status 0\n", argv[0]);
- err = -EINVAL;
- }
+ os_close_file(fds[1]);
+ read_output(fds[0], output, output_len);
+ printk("%s", output);
+
+ CATCH_EINTR(err = waitpid(pid, &status, 0));
+ if(err < 0)
+ err = errno;
+ else if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0)){
+ printk("'%s' didn't exit with status 0\n", argv[0]);
+ err = -EINVAL;
}
+ else err = 0;
os_close_file(fds[0]);
- return(err);
+out_free:
+ kfree(output);
+ return err;
+
+out_close:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+out:
+ return err;
}
static int slip_open(void *data)
@@ -123,21 +133,26 @@ static int slip_open(void *data)
NULL };
int sfd, mfd, err;
- mfd = get_pty();
- if(mfd < 0){
- printk("umn : Failed to open pty, err = %d\n", -mfd);
- return(mfd);
+ err = get_pty();
+ if(err < 0){
+ printk("slip-open : Failed to open pty, err = %d\n", -err);
+ goto out;
}
- sfd = os_open_file(ptsname(mfd), of_rdwr(OPENFLAGS()), 0);
- if(sfd < 0){
- printk("Couldn't open tty for slip line, err = %d\n", -sfd);
- os_close_file(mfd);
- return(sfd);
+ mfd = err;
+
+ err = os_open_file(ptsname(mfd), of_rdwr(OPENFLAGS()), 0);
+ if(err < 0){
+ printk("Couldn't open tty for slip line, err = %d\n", -err);
+ goto out_close;
}
- if(set_up_tty(sfd)) return(-1);
+ sfd = err;
+
+ if(set_up_tty(sfd))
+ goto out_close2;
+
pri->slave = sfd;
- pri->pos = 0;
- pri->esc = 0;
+ pri->slip.pos = 0;
+ pri->slip.esc = 0;
if(pri->gate_addr != NULL){
sprintf(version_buf, "%d", UML_NET_VERSION);
strcpy(gate_buf, pri->gate_addr);
@@ -146,12 +161,12 @@ static int slip_open(void *data)
if(err < 0){
printk("slip_tramp failed - err = %d\n", -err);
- return(err);
+ goto out_close2;
}
err = os_get_ifname(pri->slave, pri->name);
if(err < 0){
printk("get_ifname failed, err = %d\n", -err);
- return(err);
+ goto out_close2;
}
iter_addresses(pri->dev, open_addr, pri->name);
}
@@ -160,10 +175,16 @@ static int slip_open(void *data)
if(err < 0){
printk("Failed to set slip discipline encapsulation - "
"err = %d\n", -err);
- return(err);
+ goto out_close2;
}
}
return(mfd);
+out_close2:
+ os_close_file(sfd);
+out_close:
+ os_close_file(mfd);
+out:
+ return err;
}
static void slip_close(int fd, void *data)
@@ -190,48 +211,12 @@ static void slip_close(int fd, void *data)
int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
{
- int i, n, size, start;
-
- if(pri->more>0) {
- i = 0;
- while(i < pri->more) {
- size = slip_unesc(pri->ibuf[i++],
- pri->ibuf, &pri->pos, &pri->esc);
- if(size){
- memcpy(buf, pri->ibuf, size);
- memmove(pri->ibuf, &pri->ibuf[i], pri->more-i);
- pri->more=pri->more-i;
- return(size);
- }
- }
- pri->more=0;
- }
-
- n = net_read(fd, &pri->ibuf[pri->pos], sizeof(pri->ibuf) - pri->pos);
- if(n <= 0) return(n);
-
- start = pri->pos;
- for(i = 0; i < n; i++){
- size = slip_unesc(pri->ibuf[start + i],
- pri->ibuf, &pri->pos, &pri->esc);
- if(size){
- memcpy(buf, pri->ibuf, size);
- memmove(pri->ibuf, &pri->ibuf[start+i+1], n-(i+1));
- pri->more=n-(i+1);
- return(size);
- }
- }
- return(0);
+ return slip_proto_read(fd, buf, len, &pri->slip);
}
int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
{
- int actual, n;
-
- actual = slip_esc(buf, pri->obuf, len);
- n = net_write(fd, pri->obuf, actual);
- if(n < 0) return(n);
- else return(len);
+ return slip_proto_write(fd, buf, len, &pri->slip);
}
static int slip_set_mtu(int mtu, void *data)
@@ -267,14 +252,3 @@ struct net_user_info slip_user_info = {
.delete_address = slip_del_addr,
.max_packet = BUF_SIZE
};
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/slirp.h b/arch/um/drivers/slirp.h
index afa4e30284f..6cf88ab580c 100644
--- a/arch/um/drivers/slirp.h
+++ b/arch/um/drivers/slirp.h
@@ -1,10 +1,7 @@
#ifndef __UM_SLIRP_H
#define __UM_SLIRP_H
-#define BUF_SIZE 1500
- /* two bytes each for a (pathological) max packet of escaped chars + *
- * terminating END char + initial END char */
-#define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
+#include "slip_common.h"
#define SLIRP_MAX_ARGS 100
/*
@@ -24,28 +21,13 @@ struct slirp_data {
struct arg_list_dummy_wrapper argw;
int pid;
int slave;
- unsigned char ibuf[ENC_BUF_SIZE];
- unsigned char obuf[ENC_BUF_SIZE];
- int more; /* more data: do not read fd until ibuf has been drained */
- int pos;
- int esc;
+ struct slip_proto slip;
};
extern struct net_user_info slirp_user_info;
-extern int set_umn_addr(int fd, char *addr, char *ptp_addr);
extern int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri);
-extern int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri);
+extern int slirp_user_write(int fd, void *buf, int len,
+ struct slirp_data *pri);
#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/slirp_kern.c b/arch/um/drivers/slirp_kern.c
index c9d6b52a831..9864d27afdb 100644
--- a/arch/um/drivers/slirp_kern.c
+++ b/arch/um/drivers/slirp_kern.c
@@ -25,10 +25,7 @@ void slirp_init(struct net_device *dev, void *data)
{ .argw = init->argw,
.pid = -1,
.slave = -1,
- .ibuf = { '\0' },
- .obuf = { '\0' },
- .pos = 0,
- .esc = 0,
+ .slip = SLIP_PROTO_INIT,
.dev = dev });
dev->init = NULL;
diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
index c322515c71c..8d91f663d82 100644
--- a/arch/um/drivers/slirp_user.c
+++ b/arch/um/drivers/slirp_user.c
@@ -12,7 +12,7 @@
#include "user.h"
#include "net_user.h"
#include "slirp.h"
-#include "slip_proto.h"
+#include "slip_common.h"
#include "helper.h"
#include "os.h"
@@ -48,47 +48,32 @@ static int slirp_tramp(char **argv, int fd)
return(pid);
}
-/* XXX This is just a trivial wrapper around os_pipe */
-static int slirp_datachan(int *mfd, int *sfd)
-{
- int fds[2], err;
-
- err = os_pipe(fds, 1, 1);
- if(err < 0){
- printk("slirp_datachan: Failed to open pipe, err = %d\n", -err);
- return(err);
- }
-
- *mfd = fds[0];
- *sfd = fds[1];
- return(0);
-}
-
static int slirp_open(void *data)
{
struct slirp_data *pri = data;
- int sfd, mfd, pid, err;
+ int fds[2], pid, err;
- err = slirp_datachan(&mfd, &sfd);
+ err = os_pipe(fds, 1, 1);
if(err)
return(err);
- pid = slirp_tramp(pri->argw.argv, sfd);
-
- if(pid < 0){
- printk("slirp_tramp failed - errno = %d\n", -pid);
- os_close_file(sfd);
- os_close_file(mfd);
- return(pid);
+ err = slirp_tramp(pri->argw.argv, fds[1]);
+ if(err < 0){
+ printk("slirp_tramp failed - errno = %d\n", -err);
+ goto out;
}
-
- pri->slave = sfd;
- pri->pos = 0;
- pri->esc = 0;
-
- pri->pid = pid;
-
- return(mfd);
+ pid = err;
+
+ pri->slave = fds[1];
+ pri->slip.pos = 0;
+ pri->slip.esc = 0;
+ pri->pid = err;
+
+ return(fds[0]);
+out:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+ return err;
}
static void slirp_close(int fd, void *data)
@@ -129,48 +114,12 @@ static void slirp_close(int fd, void *data)
int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
{
- int i, n, size, start;
-
- if(pri->more>0) {
- i = 0;
- while(i < pri->more) {
- size = slip_unesc(pri->ibuf[i++],
- pri->ibuf,&pri->pos,&pri->esc);
- if(size){
- memcpy(buf, pri->ibuf, size);
- memmove(pri->ibuf, &pri->ibuf[i], pri->more-i);
- pri->more=pri->more-i;
- return(size);
- }
- }
- pri->more=0;
- }
-
- n = net_read(fd, &pri->ibuf[pri->pos], sizeof(pri->ibuf) - pri->pos);
- if(n <= 0) return(n);
-
- start = pri->pos;
- for(i = 0; i < n; i++){
- size = slip_unesc(pri->ibuf[start + i],
- pri->ibuf,&pri->pos,&pri->esc);
- if(size){
- memcpy(buf, pri->ibuf, size);
- memmove(pri->ibuf, &pri->ibuf[start+i+1], n-(i+1));
- pri->more=n-(i+1);
- return(size);
- }
- }
- return(0);
+ return slip_proto_read(fd, buf, len, &pri->slip);
}
int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
{
- int actual, n;
-
- actual = slip_esc(buf, pri->obuf, len);
- n = net_write(fd, pri->obuf, actual);
- if(n < 0) return(n);
- else return(len);
+ return slip_proto_write(fd, buf, len, &pri->slip);
}
static int slirp_set_mtu(int mtu, void *data)
@@ -188,14 +137,3 @@ struct net_user_info slirp_user_info = {
.delete_address = NULL,
.max_packet = BUF_SIZE
};
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h
index 6eaeb991998..c8ee9559f3a 100644
--- a/arch/um/include/sysdep-i386/ptrace.h
+++ b/arch/um/include/sysdep-i386/ptrace.h
@@ -8,6 +8,8 @@
#include "uml-config.h"
#include "user_constants.h"
+#include "sysdep/faultinfo.h"
+#include "choose-mode.h"
#define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
#define MAX_REG_OFFSET (UM_FRAME_SIZE)
@@ -58,9 +60,6 @@ extern int sysemu_supported;
#define PTRACE_SYSEMU_SINGLESTEP 32
#endif
-#include "sysdep/faultinfo.h"
-#include "choose-mode.h"
-
union uml_pt_regs {
#ifdef UML_CONFIG_MODE_TT
struct tt_regs {
diff --git a/arch/um/kernel/main.c b/arch/um/kernel/main.c
index e42e6364ca1..e59f5815267 100644
--- a/arch/um/kernel/main.c
+++ b/arch/um/kernel/main.c
@@ -24,8 +24,6 @@
#include "mode.h"
#include "choose-mode.h"
#include "uml-config.h"
-#include "irq_user.h"
-#include "time_user.h"
#include "os.h"
/* Set in set_stklim, which is called from main and __wrap_malloc.
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 51f8e5a8ac6..1b5ef3e96c7 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -30,7 +30,6 @@
#include "init.h"
#include "os.h"
#include "uml-config.h"
-#include "ptrace_user.h"
#include "choose-mode.h"
#include "mode.h"
#ifdef UML_CONFIG_MODE_SKAS
@@ -131,7 +130,7 @@ int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
return(arg.pid);
}
-static int ptrace_child(void *arg)
+static int ptrace_child(void)
{
int ret;
int pid = os_getpid(), ppid = getppid();
@@ -160,20 +159,16 @@ static int ptrace_child(void *arg)
_exit(ret);
}
-static int start_ptraced_child(void **stack_out)
+static int start_ptraced_child(void)
{
- void *stack;
- unsigned long sp;
int pid, n, status;
- stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if(stack == MAP_FAILED)
- panic("check_ptrace : mmap failed, errno = %d", errno);
- sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
- pid = clone(ptrace_child, (void *) sp, SIGCHLD, NULL);
+ pid = fork();
+ if(pid == 0)
+ ptrace_child();
+
if(pid < 0)
- panic("check_ptrace : clone failed, errno = %d", errno);
+ panic("check_ptrace : fork failed, errno = %d", errno);
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0)
panic("check_ptrace : wait failed, errno = %d", errno);
@@ -181,7 +176,6 @@ static int start_ptraced_child(void **stack_out)
panic("check_ptrace : expected SIGSTOP, got status = %d",
status);
- *stack_out = stack;
return(pid);
}
@@ -189,12 +183,12 @@ static int start_ptraced_child(void **stack_out)
* just avoid using sysemu, not panic, but only if SYSEMU features are broken.
* So only for SYSEMU features we test mustpanic, while normal host features
* must work anyway!*/
-static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
+static int stop_ptraced_child(int pid, int exitcode, int mustexit)
{
int status, n, ret = 0;
if(ptrace(PTRACE_CONT, pid, 0, 0) < 0)
- panic("check_ptrace : ptrace failed, errno = %d", errno);
+ panic("stop_ptraced_child : ptrace failed, errno = %d", errno);
CATCH_EINTR(n = waitpid(pid, &status, 0));
if(!WIFEXITED(status) || (WEXITSTATUS(status) != exitcode)) {
int exit_with = WEXITSTATUS(status);
@@ -205,15 +199,13 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
printk("check_ptrace : child exited with exitcode %d, while "
"expecting %d; status 0x%x", exit_with,
exitcode, status);
- if (mustpanic)
+ if (mustexit)
panic("\n");
else
printk("\n");
ret = -1;
}
- if(munmap(stack, PAGE_SIZE) < 0)
- panic("check_ptrace : munmap failed, errno = %d", errno);
return ret;
}
@@ -235,12 +227,11 @@ __uml_setup("nosysemu", nosysemu_cmd_param,
static void __init check_sysemu(void)
{
- void *stack;
int pid, syscall, n, status, count=0;
printk("Checking syscall emulation patch for ptrace...");
sysemu_supported = 0;
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
if(ptrace(PTRACE_SYSEMU, pid, 0, 0) < 0)
goto fail;
@@ -258,7 +249,7 @@ static void __init check_sysemu(void)
panic("check_sysemu : failed to modify system "
"call return, errno = %d", errno);
- if (stop_ptraced_child(pid, stack, 0, 0) < 0)
+ if (stop_ptraced_child(pid, 0, 0) < 0)
goto fail_stopped;
sysemu_supported = 1;
@@ -266,7 +257,7 @@ static void __init check_sysemu(void)
set_using_sysemu(!force_sysemu_disabled);
printk("Checking advanced syscall emulation patch for ptrace...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
while(1){
count++;
if(ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0)
@@ -291,7 +282,7 @@ static void __init check_sysemu(void)
break;
}
}
- if (stop_ptraced_child(pid, stack, 0, 0) < 0)
+ if (stop_ptraced_child(pid, 0, 0) < 0)
goto fail_stopped;
sysemu_supported = 2;
@@ -302,18 +293,17 @@ static void __init check_sysemu(void)
return;
fail:
- stop_ptraced_child(pid, stack, 1, 0);
+ stop_ptraced_child(pid, 1, 0);
fail_stopped:
printk("missing\n");
}
void __init check_ptrace(void)
{
- void *stack;
int pid, syscall, n, status;
printk("Checking that ptrace can change system call numbers...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
panic("check_ptrace: PTRACE_SETOPTIONS failed, errno = %d", errno);
@@ -340,7 +330,7 @@ void __init check_ptrace(void)
break;
}
}
- stop_ptraced_child(pid, stack, 0, 1);
+ stop_ptraced_child(pid, 0, 1);
printk("OK\n");
check_sysemu();
}
@@ -372,11 +362,10 @@ void forward_pending_sigio(int target)
static inline int check_skas3_ptrace_support(void)
{
struct ptrace_faultinfo fi;
- void *stack;
int pid, n, ret = 1;
printf("Checking for the skas3 patch in the host...");
- pid = start_ptraced_child(&stack);
+ pid = start_ptraced_child();
n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi);
if (n < 0) {
@@ -391,7 +380,7 @@ static inline int check_skas3_ptrace_support(void)
}
init_registers(pid);
- stop_ptraced_child(pid, stack, 1, 1);
+ stop_ptraced_child(pid, 1, 1);
return(ret);
}
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 418427107b2..8736d098f0e 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -26,7 +26,6 @@
#include "asm/setup.h"
#include "ubd_user.h"
#include "asm/current.h"
-#include "asm/setup.h"
#include "user_util.h"
#include "kern_util.h"
#include "kern.h"
diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules
index 0b2491883d9..98346c71149 100644
--- a/arch/um/scripts/Makefile.rules
+++ b/arch/um/scripts/Makefile.rules
@@ -14,7 +14,7 @@ quiet_cmd_make_link = SYMLINK $@
cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@
# this needs to be before the foreach, because targets does not accept
-# complete paths like $(obj)/$(f). To make sure this works, use a := assignment,
+# complete paths like $(obj)/$(f). To make sure this works, use a := assignment
# or we will get $(obj)/$(f) in the "targets" value.
# Also, this forces you to use the := syntax when assigning to targets.
# Otherwise the line below will cause an infinite loop (if you don't know why,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-02-09 10:36:40 +0000