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-rw-r--r--arch/um/os-Linux/Makefile8
-rw-r--r--arch/um/os-Linux/aio.c10
-rw-r--r--arch/um/os-Linux/drivers/tuntap_user.c8
-rw-r--r--arch/um/os-Linux/elf_aux.c8
-rw-r--r--arch/um/os-Linux/file.c82
-rw-r--r--arch/um/os-Linux/mem.c161
-rw-r--r--arch/um/os-Linux/process.c1
-rw-r--r--arch/um/os-Linux/start_up.c109
-rw-r--r--arch/um/os-Linux/tt.c14
-rw-r--r--arch/um/os-Linux/util/Makefile4
-rw-r--r--arch/um/os-Linux/util/mk_user_constants.c23
11 files changed, 335 insertions, 93 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 7a1662419c0..d15ec2af6a2 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -3,11 +3,11 @@
# Licensed under the GPL
#
-obj-y = aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
- tty.o user_syms.o drivers/ sys-$(SUBARCH)/
+obj-y = aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o time.o \
+ tt.o tty.o user_syms.o drivers/ sys-$(SUBARCH)/
-USER_OBJS := aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
- tty.o
+USER_OBJS := aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o \
+ time.o tt.o tty.o
elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
CFLAGS_elf_aux.o += -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index b04897cd995..f6e64026f99 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -117,6 +117,8 @@ static int do_aio(aio_context_t ctx, struct aio_context *aio)
err = io_submit(ctx, 1, &iocbp);
if(err > 0)
err = 0;
+ else
+ err = -errno;
out:
return err;
@@ -142,7 +144,8 @@ static int aio_thread(void *arg)
"errno = %d\n", errno);
}
else {
- aio = (struct aio_context *) event.data;
+ /* This is safe as we've just a pointer here. */
+ aio = (struct aio_context *) (long) event.data;
if(update_aio(aio, event.res)){
do_aio(ctx, aio);
continue;
@@ -313,15 +316,16 @@ static int init_aio_26(void)
int err;
if(io_setup(256, &ctx)){
+ err = -errno;
printk("aio_thread failed to initialize context, err = %d\n",
errno);
- return -errno;
+ return err;
}
err = run_helper_thread(aio_thread, NULL,
CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
if(err < 0)
- return -errno;
+ return err;
aio_pid = err;
diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c
index 4b83c6c3f48..4ba9b17adf1 100644
--- a/arch/um/os-Linux/drivers/tuntap_user.c
+++ b/arch/um/os-Linux/drivers/tuntap_user.c
@@ -75,7 +75,7 @@ static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote,
struct msghdr msg;
struct cmsghdr *cmsg;
struct iovec iov;
- int pid, n;
+ int pid, n, err;
sprintf(version_buf, "%d", UML_NET_VERSION);
@@ -105,9 +105,10 @@ static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote,
n = recvmsg(me, &msg, 0);
*used_out = n;
if(n < 0){
+ err = -errno;
printk("tuntap_open_tramp : recvmsg failed - errno = %d\n",
errno);
- return(-errno);
+ return err;
}
CATCH_EINTR(waitpid(pid, NULL, 0));
@@ -147,9 +148,10 @@ static int tuntap_open(void *data)
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strlcpy(ifr.ifr_name, pri->dev_name, sizeof(ifr.ifr_name));
if(ioctl(pri->fd, TUNSETIFF, (void *) &ifr) < 0){
+ err = -errno;
printk("TUNSETIFF failed, errno = %d\n", errno);
os_close_file(pri->fd);
- return(-errno);
+ return err;
}
}
else {
diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index 1399520a858..5a99dd3fbed 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -12,9 +12,10 @@
#include "init.h"
#include "elf_user.h"
#include "mem_user.h"
-#include <kernel-offsets.h>
+#include <kern_constants.h>
-#if HOST_ELF_CLASS == ELFCLASS32
+/* Use the one from the kernel - the host may miss it, if having old headers. */
+#if UM_ELF_CLASS == UM_ELFCLASS32
typedef Elf32_auxv_t elf_auxv_t;
#else
typedef Elf64_auxv_t elf_auxv_t;
@@ -54,7 +55,8 @@ __init void scan_elf_aux( char **envp)
* a_un, so we have to use a_val, which is
* all that's left.
*/
- elf_aux_platform = (char *) auxv->a_un.a_val;
+ elf_aux_platform =
+ (char *) (long) auxv->a_un.a_val;
break;
case AT_PAGESZ:
page_size = auxv->a_un.a_val;
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index fd45bb26090..f55773c819e 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -119,15 +119,11 @@ int os_window_size(int fd, int *rows, int *cols)
int os_new_tty_pgrp(int fd, int pid)
{
- if(ioctl(fd, TIOCSCTTY, 0) < 0){
- printk("TIOCSCTTY failed, errno = %d\n", errno);
- return(-errno);
- }
+ if(ioctl(fd, TIOCSCTTY, 0) < 0)
+ return -errno;
- if(tcsetpgrp(fd, pid) < 0){
- printk("tcsetpgrp failed, errno = %d\n", errno);
- return(-errno);
- }
+ if(tcsetpgrp(fd, pid) < 0)
+ return -errno;
return(0);
}
@@ -146,18 +142,12 @@ int os_set_slip(int fd)
int disc, sencap;
disc = N_SLIP;
- if(ioctl(fd, TIOCSETD, &disc) < 0){
- printk("Failed to set slip line discipline - "
- "errno = %d\n", errno);
- return(-errno);
- }
+ if(ioctl(fd, TIOCSETD, &disc) < 0)
+ return -errno;
sencap = 0;
- if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0){
- printk("Failed to set slip encapsulation - "
- "errno = %d\n", errno);
- return(-errno);
- }
+ if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
+ return -errno;
return(0);
}
@@ -180,22 +170,15 @@ int os_sigio_async(int master, int slave)
int flags;
flags = fcntl(master, F_GETFL);
- if(flags < 0) {
- printk("fcntl F_GETFL failed, errno = %d\n", errno);
- return(-errno);
- }
+ if(flags < 0)
+ return errno;
if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
- (fcntl(master, F_SETOWN, os_getpid()) < 0)){
- printk("fcntl F_SETFL or F_SETOWN failed, errno = %d\n",
- errno);
- return(-errno);
- }
+ (fcntl(master, F_SETOWN, os_getpid()) < 0))
+ return -errno;
- if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0)){
- printk("fcntl F_SETFL failed, errno = %d\n", errno);
- return(-errno);
- }
+ if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
+ return -errno;
return(0);
}
@@ -255,7 +238,7 @@ int os_file_mode(char *file, struct openflags *mode_out)
int os_open_file(char *file, struct openflags flags, int mode)
{
- int fd, f = 0;
+ int fd, err, f = 0;
if(flags.r && flags.w) f = O_RDWR;
else if(flags.r) f = O_RDONLY;
@@ -272,8 +255,9 @@ int os_open_file(char *file, struct openflags flags, int mode)
return(-errno);
if(flags.cl && fcntl(fd, F_SETFD, 1)){
+ err = -errno;
os_close_file(fd);
- return(-errno);
+ return err;
}
return(fd);
@@ -383,9 +367,9 @@ int os_file_size(char *file, unsigned long long *size_out)
return(fd);
}
if(ioctl(fd, BLKGETSIZE, &blocks) < 0){
+ err = -errno;
printk("Couldn't get the block size of \"%s\", "
"errno = %d\n", file, errno);
- err = -errno;
os_close_file(fd);
return(err);
}
@@ -473,11 +457,14 @@ int os_pipe(int *fds, int stream, int close_on_exec)
int os_set_fd_async(int fd, int owner)
{
+ int err;
+
/* XXX This should do F_GETFL first */
if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
+ err = -errno;
printk("os_set_fd_async : failed to set O_ASYNC and "
"O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
- return(-errno);
+ return err;
}
#ifdef notdef
if(fcntl(fd, F_SETFD, 1) < 0){
@@ -488,10 +475,11 @@ int os_set_fd_async(int fd, int owner)
if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
(fcntl(fd, F_SETOWN, owner) < 0)){
+ err = -errno;
printk("os_set_fd_async : Failed to fcntl F_SETOWN "
"(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
owner, errno);
- return(-errno);
+ return err;
}
return(0);
@@ -516,11 +504,9 @@ int os_set_fd_block(int fd, int blocking)
if(blocking) flags &= ~O_NONBLOCK;
else flags |= O_NONBLOCK;
- if(fcntl(fd, F_SETFL, flags) < 0){
- printk("Failed to change blocking on fd # %d, errno = %d\n",
- fd, errno);
- return(-errno);
- }
+ if(fcntl(fd, F_SETFL, flags) < 0)
+ return -errno;
+
return(0);
}
@@ -609,11 +595,8 @@ int os_create_unix_socket(char *file, int len, int close_on_exec)
int sock, err;
sock = socket(PF_UNIX, SOCK_DGRAM, 0);
- if (sock < 0){
- printk("create_unix_socket - socket failed, errno = %d\n",
- errno);
- return(-errno);
- }
+ if(sock < 0)
+ return -errno;
if(close_on_exec) {
err = os_set_exec_close(sock, 1);
@@ -628,11 +611,8 @@ int os_create_unix_socket(char *file, int len, int close_on_exec)
snprintf(addr.sun_path, len, "%s", file);
err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
- if (err < 0){
- printk("create_listening_socket at '%s' - bind failed, "
- "errno = %d\n", file, errno);
- return(-errno);
- }
+ if(err < 0)
+ return -errno;
return(sock);
}
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
new file mode 100644
index 00000000000..8e71edaaf80
--- /dev/null
+++ b/arch/um/os-Linux/mem.c
@@ -0,0 +1,161 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include "kern_util.h"
+#include "user.h"
+#include "user_util.h"
+#include "mem_user.h"
+#include "init.h"
+#include "os.h"
+#include "tempfile.h"
+#include "kern_constants.h"
+
+#include <sys/param.h>
+
+static char *tempdir = NULL;
+
+static void __init find_tempdir(void)
+{
+ char *dirs[] = { "TMP", "TEMP", "TMPDIR", NULL };
+ int i;
+ char *dir = NULL;
+
+ if(tempdir != NULL) return; /* We've already been called */
+ for(i = 0; dirs[i]; i++){
+ dir = getenv(dirs[i]);
+ if((dir != NULL) && (*dir != '\0'))
+ break;
+ }
+ if((dir == NULL) || (*dir == '\0'))
+ dir = "/tmp";
+
+ tempdir = malloc(strlen(dir) + 2);
+ if(tempdir == NULL){
+ fprintf(stderr, "Failed to malloc tempdir, "
+ "errno = %d\n", errno);
+ return;
+ }
+ strcpy(tempdir, dir);
+ strcat(tempdir, "/");
+}
+
+/*
+ * This proc still used in tt-mode
+ * (file: kernel/tt/ptproxy/proxy.c, proc: start_debugger).
+ * So it isn't 'static' yet.
+ */
+int make_tempfile(const char *template, char **out_tempname, int do_unlink)
+{
+ char tempname[MAXPATHLEN];
+ int fd;
+
+ find_tempdir();
+ if (*template != '/')
+ strcpy(tempname, tempdir);
+ else
+ *tempname = 0;
+ strcat(tempname, template);
+ fd = mkstemp(tempname);
+ if(fd < 0){
+ fprintf(stderr, "open - cannot create %s: %s\n", tempname,
+ strerror(errno));
+ return -1;
+ }
+ if(do_unlink && (unlink(tempname) < 0)){
+ perror("unlink");
+ return -1;
+ }
+ if(out_tempname){
+ *out_tempname = strdup(tempname);
+ if(*out_tempname == NULL){
+ perror("strdup");
+ return -1;
+ }
+ }
+ return(fd);
+}
+
+#define TEMPNAME_TEMPLATE "vm_file-XXXXXX"
+
+/*
+ * This proc is used in start_up.c
+ * So it isn't 'static'.
+ */
+int create_tmp_file(unsigned long len)
+{
+ int fd, err;
+ char zero;
+
+ fd = make_tempfile(TEMPNAME_TEMPLATE, NULL, 1);
+ if(fd < 0) {
+ exit(1);
+ }
+
+ err = fchmod(fd, 0777);
+ if(err < 0){
+ perror("os_mode_fd");
+ exit(1);
+ }
+
+ if (lseek64(fd, len, SEEK_SET) < 0) {
+ perror("os_seek_file");
+ exit(1);
+ }
+
+ zero = 0;
+
+ err = os_write_file(fd, &zero, 1);
+ if(err != 1){
+ errno = -err;
+ perror("os_write_file");
+ exit(1);
+ }
+
+ return(fd);
+}
+
+static int create_anon_file(unsigned long len)
+{
+ void *addr;
+ int fd;
+
+ fd = open("/dev/anon", O_RDWR);
+ if(fd < 0) {
+ perror("opening /dev/anon");
+ exit(1);
+ }
+
+ addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if(addr == MAP_FAILED){
+ perror("mapping physmem file");
+ exit(1);
+ }
+ munmap(addr, len);
+
+ return(fd);
+}
+
+extern int have_devanon;
+
+int create_mem_file(unsigned long len)
+{
+ int err, fd;
+
+ if(have_devanon)
+ fd = create_anon_file(len);
+ else fd = create_tmp_file(len);
+
+ err = os_set_exec_close(fd, 1);
+ if(err < 0){
+ errno = -err;
+ perror("exec_close");
+ }
+ return(fd);
+}
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index d32413e4b4c..d9c52387c4a 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -3,6 +3,7 @@
* Licensed under the GPL
*/
+#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 040cc1472bc..6af83171ca4 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -4,18 +4,22 @@
*/
#include <stdio.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sched.h>
+#include <fcntl.h>
#include <errno.h>
-#include <stdarg.h>
-#include <stdlib.h>
#include <setjmp.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <asm/unistd.h>
#include <asm/page.h>
+#include <sys/types.h>
#include "user_util.h"
#include "kern_util.h"
#include "user.h"
@@ -25,6 +29,7 @@
#include "sysdep/sigcontext.h"
#include "irq_user.h"
#include "ptrace_user.h"
+#include "mem_user.h"
#include "time_user.h"
#include "init.h"
#include "os.h"
@@ -32,6 +37,8 @@
#include "choose-mode.h"
#include "mode.h"
#include "tempfile.h"
+#include "kern_constants.h"
+
#ifdef UML_CONFIG_MODE_SKAS
#include "skas.h"
#include "skas_ptrace.h"
@@ -276,9 +283,38 @@ static void __init check_ptrace(void)
check_sysemu();
}
+extern int create_tmp_file(unsigned long len);
+
+static void check_tmpexec(void)
+{
+ void *addr;
+ int err, fd = create_tmp_file(UM_KERN_PAGE_SIZE);
+
+ addr = mmap(NULL, UM_KERN_PAGE_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, fd, 0);
+ printf("Checking PROT_EXEC mmap in /tmp...");
+ fflush(stdout);
+ if(addr == MAP_FAILED){
+ err = errno;
+ perror("failed");
+ if(err == EPERM)
+ printf("/tmp must be not mounted noexec\n");
+ exit(1);
+ }
+ printf("OK\n");
+ munmap(addr, UM_KERN_PAGE_SIZE);
+
+ close(fd);
+}
+
void os_early_checks(void)
{
check_ptrace();
+
+ /* Need to check this early because mmapping happens before the
+ * kernel is running.
+ */
+ check_tmpexec();
}
static int __init noprocmm_cmd_param(char *str, int* add)
@@ -357,3 +393,72 @@ int can_do_skas(void)
return(0);
}
#endif
+
+int have_devanon = 0;
+
+void check_devanon(void)
+{
+ int fd;
+
+ printk("Checking for /dev/anon on the host...");
+ fd = open("/dev/anon", O_RDWR);
+ if(fd < 0){
+ printk("Not available (open failed with errno %d)\n", errno);
+ return;
+ }
+
+ printk("OK\n");
+ have_devanon = 1;
+}
+
+int __init parse_iomem(char *str, int *add)
+{
+ struct iomem_region *new;
+ struct uml_stat buf;
+ char *file, *driver;
+ int fd, err, size;
+
+ driver = str;
+ file = strchr(str,',');
+ if(file == NULL){
+ printf("parse_iomem : failed to parse iomem\n");
+ goto out;
+ }
+ *file = '\0';
+ file++;
+ fd = os_open_file(file, of_rdwr(OPENFLAGS()), 0);
+ if(fd < 0){
+ os_print_error(fd, "parse_iomem - Couldn't open io file");
+ goto out;
+ }
+
+ err = os_stat_fd(fd, &buf);
+ if(err < 0){
+ os_print_error(err, "parse_iomem - cannot stat_fd file");
+ goto out_close;
+ }
+
+ new = malloc(sizeof(*new));
+ if(new == NULL){
+ perror("Couldn't allocate iomem_region struct");
+ goto out_close;
+ }
+
+ size = (buf.ust_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
+
+ *new = ((struct iomem_region) { .next = iomem_regions,
+ .driver = driver,
+ .fd = fd,
+ .size = size,
+ .phys = 0,
+ .virt = 0 });
+ iomem_regions = new;
+ iomem_size += new->size + UM_KERN_PAGE_SIZE;
+
+ return(0);
+ out_close:
+ os_close_file(fd);
+ out:
+ return(1);
+}
+
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
index 5b047ab8416..a6db8877931 100644
--- a/arch/um/os-Linux/tt.c
+++ b/arch/um/os-Linux/tt.c
@@ -36,6 +36,20 @@
#include "mode.h"
#include "tempfile.h"
+int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
+ int must_succeed)
+{
+ int err;
+
+ err = os_protect_memory((void *) addr, len, r, w, x);
+ if(err < 0){
+ if(must_succeed)
+ panic("protect failed, err = %d", -err);
+ else return(err);
+ }
+ return(0);
+}
+
/*
*-------------------------
* only for tt mode (will be deleted in future...)
diff --git a/arch/um/os-Linux/util/Makefile b/arch/um/os-Linux/util/Makefile
deleted file mode 100644
index 9778aed0c31..00000000000
--- a/arch/um/os-Linux/util/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-hostprogs-y := mk_user_constants
-always := $(hostprogs-y)
-
-HOSTCFLAGS_mk_user_constants.o := -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/util/mk_user_constants.c b/arch/um/os-Linux/util/mk_user_constants.c
deleted file mode 100644
index 4838f30eecf..00000000000
--- a/arch/um/os-Linux/util/mk_user_constants.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include <stdio.h>
-#include <user-offsets.h>
-
-int main(int argc, char **argv)
-{
- printf("/*\n");
- printf(" * Generated by mk_user_constants\n");
- printf(" */\n");
- printf("\n");
- printf("#ifndef __UM_USER_CONSTANTS_H\n");
- printf("#define __UM_USER_CONSTANTS_H\n");
- printf("\n");
- /* I'd like to use FRAME_SIZE from ptrace.h here, but that's wrong on
- * x86_64 (216 vs 168 bytes). user_regs_struct is the correct size on
- * both x86_64 and i386.
- */
- printf("#define UM_FRAME_SIZE %d\n", __UM_FRAME_SIZE);
-
- printf("\n");
- printf("#endif\n");
-
- return(0);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-07 20:48:40 +0000