Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
linux-user/syscall.h | 51 ++++
linux-user/strace.c | 35 ---
linux-user/syscall.c | 402 +------------------------------
linux-user/syscall_file.c | 423 +++++++++++++++++++++++++++++++++
linux-user/Makefile.objs | 3 +-
linux-user/gen_syscall_list.py | 5 +
linux-user/strace.list | 15 --
7 files changed, 484 insertions(+), 450 deletions(-)
create mode 100644 linux-user/syscall_file.c
diff --git a/linux-user/syscall.h b/linux-user/syscall.h
index 7eb078c3e5..e35b0a60f5 100644
--- a/linux-user/syscall.h
+++ b/linux-user/syscall.h
@@ -125,6 +125,57 @@ static inline int is_error(abi_ulong ret)
return ret >= -4096;
}
+typedef abi_long (*TargetFdDataFunc)(void *, size_t);
+typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
+typedef struct TargetFdTrans {
+ TargetFdDataFunc host_to_target_data;
+ TargetFdDataFunc target_to_host_data;
+ TargetFdAddrFunc target_to_host_addr;
+} TargetFdTrans;
+
+extern TargetFdTrans **target_fd_trans;
+extern unsigned int target_fd_max;
+
+static inline TargetFdDataFunc fd_trans_target_to_host_data(int fd)
+{
+ if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+ return target_fd_trans[fd]->target_to_host_data;
+ }
+ return NULL;
+}
+
+static inline TargetFdDataFunc fd_trans_host_to_target_data(int fd)
+{
+ if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+ return target_fd_trans[fd]->host_to_target_data;
+ }
+ return NULL;
+}
+
+static inline TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
+{
+ if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+ return target_fd_trans[fd]->target_to_host_addr;
+ }
+ return NULL;
+}
+
+void fd_trans_register(int fd, TargetFdTrans *trans);
+
+static inline void fd_trans_unregister(int fd)
+{
+ if (fd >= 0 && fd < target_fd_max) {
+ target_fd_trans[fd] = NULL;
+ }
+}
+
+/* Temporary declarations from syscall_foo.c back to main syscall.c.
+ * These indicate incomplete conversion.
+ */
+
+int is_proc_myself(const char *filename, const char *entry);
+extern bitmask_transtbl const fcntl_flags_tbl[];
+
/* Declarators for interruptable system calls. */
#define safe_syscall0(type, name) \
diff --git a/linux-user/strace.c b/linux-user/strace.c
index 6375feb747..1ae0057365 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -2213,41 +2213,6 @@ print_mq_open(const struct syscallname *name,
}
#endif
-#ifdef TARGET_NR_open
-static void
-print_open(const struct syscallname *name,
- abi_long arg0, abi_long arg1, abi_long arg2,
- abi_long arg3, abi_long arg4, abi_long arg5)
-{
- int is_creat = (arg1 & TARGET_O_CREAT);
-
- print_syscall_prologue(name);
- print_string(arg0, 0);
- print_open_flags(arg1, (is_creat == 0));
- if (is_creat)
- print_file_mode(arg2, 1);
- print_syscall_epilogue(name);
-}
-#endif
-
-#ifdef TARGET_NR_openat
-static void
-print_openat(const struct syscallname *name,
- abi_long arg0, abi_long arg1, abi_long arg2,
- abi_long arg3, abi_long arg4, abi_long arg5)
-{
- int is_creat = (arg2 & TARGET_O_CREAT);
-
- print_syscall_prologue(name);
- print_at_dirfd(arg0, 0);
- print_string(arg1, 0);
- print_open_flags(arg2, (is_creat == 0));
- if (is_creat)
- print_file_mode(arg3, 1);
- print_syscall_epilogue(name);
-}
-#endif
-
#ifdef TARGET_NR_mq_unlink
static void
print_mq_unlink(const struct syscallname *name,
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index a96bbf9093..c47e73de5f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -325,42 +325,6 @@ _syscall5(int, kcmp, pid_t, pid1, pid_t, pid2, int, type,
unsigned long, idx1, unsigned long, idx2)
#endif
-static bitmask_transtbl fcntl_flags_tbl[] = {
- { TARGET_O_ACCMODE, TARGET_O_WRONLY, O_ACCMODE, O_WRONLY, },
- { TARGET_O_ACCMODE, TARGET_O_RDWR, O_ACCMODE, O_RDWR, },
- { TARGET_O_CREAT, TARGET_O_CREAT, O_CREAT, O_CREAT, },
- { TARGET_O_EXCL, TARGET_O_EXCL, O_EXCL, O_EXCL, },
- { TARGET_O_NOCTTY, TARGET_O_NOCTTY, O_NOCTTY, O_NOCTTY, },
- { TARGET_O_TRUNC, TARGET_O_TRUNC, O_TRUNC, O_TRUNC, },
- { TARGET_O_APPEND, TARGET_O_APPEND, O_APPEND, O_APPEND, },
- { TARGET_O_NONBLOCK, TARGET_O_NONBLOCK, O_NONBLOCK, O_NONBLOCK, },
- { TARGET_O_SYNC, TARGET_O_DSYNC, O_SYNC, O_DSYNC, },
- { TARGET_O_SYNC, TARGET_O_SYNC, O_SYNC, O_SYNC, },
- { TARGET_FASYNC, TARGET_FASYNC, FASYNC, FASYNC, },
- { TARGET_O_DIRECTORY, TARGET_O_DIRECTORY, O_DIRECTORY, O_DIRECTORY, },
- { TARGET_O_NOFOLLOW, TARGET_O_NOFOLLOW, O_NOFOLLOW, O_NOFOLLOW, },
-#if defined(O_DIRECT)
- { TARGET_O_DIRECT, TARGET_O_DIRECT, O_DIRECT, O_DIRECT, },
-#endif
-#if defined(O_NOATIME)
- { TARGET_O_NOATIME, TARGET_O_NOATIME, O_NOATIME, O_NOATIME },
-#endif
-#if defined(O_CLOEXEC)
- { TARGET_O_CLOEXEC, TARGET_O_CLOEXEC, O_CLOEXEC, O_CLOEXEC },
-#endif
-#if defined(O_PATH)
- { TARGET_O_PATH, TARGET_O_PATH, O_PATH, O_PATH },
-#endif
-#if defined(O_TMPFILE)
- { TARGET_O_TMPFILE, TARGET_O_TMPFILE, O_TMPFILE, O_TMPFILE },
-#endif
- /* Don't terminate the list prematurely on 64-bit host+guest. */
-#if TARGET_O_LARGEFILE != 0 || O_LARGEFILE != 0
- { TARGET_O_LARGEFILE, TARGET_O_LARGEFILE, O_LARGEFILE, O_LARGEFILE, },
-#endif
- { 0, 0, 0, 0 }
-};
-
enum {
QEMU_IFLA_BR_UNSPEC,
QEMU_IFLA_BR_FORWARD_DELAY,
@@ -539,43 +503,10 @@ enum {
QEMU___IFLA_XDP_MAX,
};
-typedef abi_long (*TargetFdDataFunc)(void *, size_t);
-typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
-typedef struct TargetFdTrans {
- TargetFdDataFunc host_to_target_data;
- TargetFdDataFunc target_to_host_data;
- TargetFdAddrFunc target_to_host_addr;
-} TargetFdTrans;
+TargetFdTrans **target_fd_trans;
+unsigned int target_fd_max;
-static TargetFdTrans **target_fd_trans;
-
-static unsigned int target_fd_max;
-
-static TargetFdDataFunc fd_trans_target_to_host_data(int fd)
-{
- if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
- return target_fd_trans[fd]->target_to_host_data;
- }
- return NULL;
-}
-
-static TargetFdDataFunc fd_trans_host_to_target_data(int fd)
-{
- if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
- return target_fd_trans[fd]->host_to_target_data;
- }
- return NULL;
-}
-
-static TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
-{
- if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
- return target_fd_trans[fd]->target_to_host_addr;
- }
- return NULL;
-}
-
-static void fd_trans_register(int fd, TargetFdTrans *trans)
+void fd_trans_register(int fd, TargetFdTrans *trans)
{
unsigned int oldmax;
@@ -590,13 +521,6 @@ static void fd_trans_register(int fd, TargetFdTrans *trans)
target_fd_trans[fd] = trans;
}
-static void fd_trans_unregister(int fd)
-{
- if (fd >= 0 && fd < target_fd_max) {
- target_fd_trans[fd] = NULL;
- }
-}
-
static void fd_trans_dup(int oldfd, int newfd)
{
fd_trans_unregister(newfd);
@@ -913,10 +837,6 @@ const char *target_strerror(int err)
return strerror(target_to_host_errno(err));
}
-safe_syscall3(ssize_t, read, int, fd, void *, buff, size_t, count)
-safe_syscall3(ssize_t, write, int, fd, const void *, buff, size_t, count)
-safe_syscall4(int, openat, int, dirfd, const char *, pathname, \
- int, flags, mode_t, mode)
safe_syscall4(pid_t, wait4, pid_t, pid, int *, status, int, options, \
struct rusage *, rusage)
safe_syscall5(int, waitid, idtype_t, idtype, id_t, id, siginfo_t *, infop, \
@@ -7490,267 +7410,6 @@ int host_to_target_waitstatus(int status)
return status;
}
-static int open_self_cmdline(void *cpu_env, int fd)
-{
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
- struct linux_binprm *bprm = ((TaskState *)cpu->opaque)->bprm;
- int i;
-
- for (i = 0; i < bprm->argc; i++) {
- size_t len = strlen(bprm->argv[i]) + 1;
-
- if (write(fd, bprm->argv[i], len) != len) {
- return -1;
- }
- }
-
- return 0;
-}
-
-static int open_self_maps(void *cpu_env, int fd)
-{
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
- TaskState *ts = cpu->opaque;
- FILE *fp;
- char *line = NULL;
- size_t len = 0;
- ssize_t read;
-
- fp = fopen("/proc/self/maps", "r");
- if (fp == NULL) {
- return -1;
- }
-
- while ((read = getline(&line, &len, fp)) != -1) {
- int fields, dev_maj, dev_min, inode;
- uint64_t min, max, offset;
- char flag_r, flag_w, flag_x, flag_p;
- char path[512] = "";
- fields = sscanf(line, "%"PRIx64"-%"PRIx64" %c%c%c%c %"PRIx64" %x:%x %d"
- " %512s", &min, &max, &flag_r, &flag_w, &flag_x,
- &flag_p, &offset, &dev_maj, &dev_min, &inode, path);
-
- if ((fields < 10) || (fields > 11)) {
- continue;
- }
- if (h2g_valid(min)) {
- int flags = page_get_flags(h2g(min));
- max = h2g_valid(max - 1) ? max : (uintptr_t)g2h(GUEST_ADDR_MAX) +
1;
- if (page_check_range(h2g(min), max - min, flags) == -1) {
- continue;
- }
- if (h2g(min) == ts->info->stack_limit) {
- pstrcpy(path, sizeof(path), " [stack]");
- }
- dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
- " %c%c%c%c %08" PRIx64 " %02x:%02x %d %s%s\n",
- h2g(min), h2g(max - 1) + 1, flag_r, flag_w,
- flag_x, flag_p, offset, dev_maj, dev_min, inode,
- path[0] ? " " : "", path);
- }
- }
-
- free(line);
- fclose(fp);
-
- return 0;
-}
-
-static int open_self_stat(void *cpu_env, int fd)
-{
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
- TaskState *ts = cpu->opaque;
- abi_ulong start_stack = ts->info->start_stack;
- int i;
-
- for (i = 0; i < 44; i++) {
- char buf[128];
- int len;
- uint64_t val = 0;
-
- if (i == 0) {
- /* pid */
- val = getpid();
- snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
- } else if (i == 1) {
- /* app name */
- snprintf(buf, sizeof(buf), "(%s) ", ts->bprm->argv[0]);
- } else if (i == 27) {
- /* stack bottom */
- val = start_stack;
- snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
- } else {
- /* for the rest, there is MasterCard */
- snprintf(buf, sizeof(buf), "0%c", i == 43 ? '\n' : ' ');
- }
-
- len = strlen(buf);
- if (write(fd, buf, len) != len) {
- return -1;
- }
- }
-
- return 0;
-}
-
-static int open_self_auxv(void *cpu_env, int fd)
-{
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
- TaskState *ts = cpu->opaque;
- abi_ulong auxv = ts->info->saved_auxv;
- abi_ulong len = ts->info->auxv_len;
- char *ptr;
-
- /*
- * Auxiliary vector is stored in target process stack.
- * read in whole auxv vector and copy it to file
- */
- ptr = lock_user(VERIFY_READ, auxv, len, 0);
- if (ptr != NULL) {
- while (len > 0) {
- ssize_t r;
- r = write(fd, ptr, len);
- if (r <= 0) {
- break;
- }
- len -= r;
- ptr += r;
- }
- lseek(fd, 0, SEEK_SET);
- unlock_user(ptr, auxv, len);
- }
-
- return 0;
-}
-
-static int is_proc_myself(const char *filename, const char *entry)
-{
- if (!strncmp(filename, "/proc/", strlen("/proc/"))) {
- filename += strlen("/proc/");
- if (!strncmp(filename, "self/", strlen("self/"))) {
- filename += strlen("self/");
- } else if (*filename >= '1' && *filename <= '9') {
- char myself[80];
- snprintf(myself, sizeof(myself), "%d/", getpid());
- if (!strncmp(filename, myself, strlen(myself))) {
- filename += strlen(myself);
- } else {
- return 0;
- }
- } else {
- return 0;
- }
- if (!strcmp(filename, entry)) {
- return 1;
- }
- }
- return 0;
-}
-
-#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
-static int is_proc(const char *filename, const char *entry)
-{
- return strcmp(filename, entry) == 0;
-}
-
-static int open_net_route(void *cpu_env, int fd)
-{
- FILE *fp;
- char *line = NULL;
- size_t len = 0;
- ssize_t read;
-
- fp = fopen("/proc/net/route", "r");
- if (fp == NULL) {
- return -1;
- }
-
- /* read header */
-
- read = getline(&line, &len, fp);
- dprintf(fd, "%s", line);
-
- /* read routes */
-
- while ((read = getline(&line, &len, fp)) != -1) {
- char iface[16];
- uint32_t dest, gw, mask;
- unsigned int flags, refcnt, use, metric, mtu, window, irtt;
- sscanf(line, "%s\t%08x\t%08x\t%04x\t%d\t%d\t%d\t%08x\t%d\t%u\t%u\n",
- iface, &dest, &gw, &flags, &refcnt, &use, &metric,
- &mask, &mtu, &window, &irtt);
- dprintf(fd, "%s\t%08x\t%08x\t%04x\t%d\t%d\t%d\t%08x\t%d\t%u\t%u\n",
- iface, tswap32(dest), tswap32(gw), flags, refcnt, use,
- metric, tswap32(mask), mtu, window, irtt);
- }
-
- free(line);
- fclose(fp);
-
- return 0;
-}
-#endif
-
-static int do_openat(void *cpu_env, int dirfd, const char *pathname, int
flags, mode_t mode)
-{
- struct fake_open {
- const char *filename;
- int (*fill)(void *cpu_env, int fd);
- int (*cmp)(const char *s1, const char *s2);
- };
- const struct fake_open *fake_open;
- static const struct fake_open fakes[] = {
- { "maps", open_self_maps, is_proc_myself },
- { "stat", open_self_stat, is_proc_myself },
- { "auxv", open_self_auxv, is_proc_myself },
- { "cmdline", open_self_cmdline, is_proc_myself },
-#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
- { "/proc/net/route", open_net_route, is_proc },
-#endif
- { NULL, NULL, NULL }
- };
-
- if (is_proc_myself(pathname, "exe")) {
- int execfd = qemu_getauxval(AT_EXECFD);
- return execfd ? execfd : safe_openat(dirfd, exec_path, flags, mode);
- }
-
- for (fake_open = fakes; fake_open->filename; fake_open++) {
- if (fake_open->cmp(pathname, fake_open->filename)) {
- break;
- }
- }
-
- if (fake_open->filename) {
- const char *tmpdir;
- char filename[PATH_MAX];
- int fd, r;
-
- /* create temporary file to map stat to */
- tmpdir = getenv("TMPDIR");
- if (!tmpdir)
- tmpdir = "/tmp";
- snprintf(filename, sizeof(filename), "%s/qemu-open.XXXXXX", tmpdir);
- fd = mkstemp(filename);
- if (fd < 0) {
- return fd;
- }
- unlink(filename);
-
- if ((r = fake_open->fill(cpu_env, fd))) {
- int e = errno;
- close(fd);
- errno = e;
- return r;
- }
- lseek(fd, 0, SEEK_SET);
-
- return fd;
- }
-
- return safe_openat(dirfd, path(pathname), flags, mode);
-}
-
#define TIMER_MAGIC 0x0caf0000
#define TIMER_MAGIC_MASK 0xffff0000
@@ -7945,57 +7604,6 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
gdb_exit(cpu_env, arg1);
_exit(arg1);
return 0; /* avoid warning */
- case TARGET_NR_read:
- if (arg3 == 0) {
- return 0;
- } else {
- if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
- return -TARGET_EFAULT;
- ret = get_errno(safe_read(arg1, p, arg3));
- if (ret >= 0 &&
- fd_trans_host_to_target_data(arg1)) {
- ret = fd_trans_host_to_target_data(arg1)(p, ret);
- }
- unlock_user(p, arg2, ret);
- }
- return ret;
- case TARGET_NR_write:
- if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
- return -TARGET_EFAULT;
- if (fd_trans_target_to_host_data(arg1)) {
- void *copy = g_malloc(arg3);
- memcpy(copy, p, arg3);
- ret = fd_trans_target_to_host_data(arg1)(copy, arg3);
- if (ret >= 0) {
- ret = get_errno(safe_write(arg1, copy, ret));
- }
- g_free(copy);
- } else {
- ret = get_errno(safe_write(arg1, p, arg3));
- }
- unlock_user(p, arg2, 0);
- return ret;
-
-#ifdef TARGET_NR_open
- case TARGET_NR_open:
- if (!(p = lock_user_string(arg1)))
- return -TARGET_EFAULT;
- ret = get_errno(do_openat(cpu_env, AT_FDCWD, p,
- target_to_host_bitmask(arg2,
fcntl_flags_tbl),
- arg3));
- fd_trans_unregister(ret);
- unlock_user(p, arg1, 0);
- return ret;
-#endif
- case TARGET_NR_openat:
- if (!(p = lock_user_string(arg2)))
- return -TARGET_EFAULT;
- ret = get_errno(do_openat(cpu_env, arg1, p,
- target_to_host_bitmask(arg3,
fcntl_flags_tbl),
- arg4));
- fd_trans_unregister(ret);
- unlock_user(p, arg2, 0);
- return ret;
#if defined(TARGET_NR_name_to_handle_at) && defined(CONFIG_OPEN_BY_HANDLE)
case TARGET_NR_name_to_handle_at:
ret = do_name_to_handle_at(arg1, arg2, arg3, arg4, arg5);
@@ -8007,10 +7615,6 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
fd_trans_unregister(ret);
return ret;
#endif
- case TARGET_NR_close:
- fd_trans_unregister(arg1);
- return get_errno(close(arg1));
-
case TARGET_NR_brk:
return do_brk(arg1);
#ifdef TARGET_NR_fork
diff --git a/linux-user/syscall_file.c b/linux-user/syscall_file.c
new file mode 100644
index 0000000000..d11128787f
--- /dev/null
+++ b/linux-user/syscall_file.c
@@ -0,0 +1,423 @@
+/*
+ * Linux file-related syscalls
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/path.h"
+#include "qemu.h"
+#include "syscall.h"
+#include <elf.h>
+#include <linux/unistd.h>
+
+
+safe_syscall4(int, openat, int, dirfd, const char *, pathname, \
+ int, flags, mode_t, mode)
+safe_syscall3(ssize_t, read, int, fd, void *, buff, size_t, count)
+safe_syscall3(ssize_t, write, int, fd, const void *, buff, size_t, count)
+
+bitmask_transtbl const fcntl_flags_tbl[] = {
+ { TARGET_O_ACCMODE, TARGET_O_WRONLY, O_ACCMODE, O_WRONLY, },
+ { TARGET_O_ACCMODE, TARGET_O_RDWR, O_ACCMODE, O_RDWR, },
+ { TARGET_O_CREAT, TARGET_O_CREAT, O_CREAT, O_CREAT, },
+ { TARGET_O_EXCL, TARGET_O_EXCL, O_EXCL, O_EXCL, },
+ { TARGET_O_NOCTTY, TARGET_O_NOCTTY, O_NOCTTY, O_NOCTTY, },
+ { TARGET_O_TRUNC, TARGET_O_TRUNC, O_TRUNC, O_TRUNC, },
+ { TARGET_O_APPEND, TARGET_O_APPEND, O_APPEND, O_APPEND, },
+ { TARGET_O_NONBLOCK, TARGET_O_NONBLOCK, O_NONBLOCK, O_NONBLOCK, },
+ { TARGET_O_SYNC, TARGET_O_DSYNC, O_SYNC, O_DSYNC, },
+ { TARGET_O_SYNC, TARGET_O_SYNC, O_SYNC, O_SYNC, },
+ { TARGET_FASYNC, TARGET_FASYNC, FASYNC, FASYNC, },
+ { TARGET_O_DIRECTORY, TARGET_O_DIRECTORY, O_DIRECTORY, O_DIRECTORY, },
+ { TARGET_O_NOFOLLOW, TARGET_O_NOFOLLOW, O_NOFOLLOW, O_NOFOLLOW, },
+#if defined(O_DIRECT)
+ { TARGET_O_DIRECT, TARGET_O_DIRECT, O_DIRECT, O_DIRECT, },
+#endif
+#if defined(O_NOATIME)
+ { TARGET_O_NOATIME, TARGET_O_NOATIME, O_NOATIME, O_NOATIME },
+#endif
+#if defined(O_CLOEXEC)
+ { TARGET_O_CLOEXEC, TARGET_O_CLOEXEC, O_CLOEXEC, O_CLOEXEC },
+#endif
+#if defined(O_PATH)
+ { TARGET_O_PATH, TARGET_O_PATH, O_PATH, O_PATH },
+#endif
+#if defined(O_TMPFILE)
+ { TARGET_O_TMPFILE, TARGET_O_TMPFILE, O_TMPFILE, O_TMPFILE },
+#endif
+ /* Don't terminate the list prematurely on 64-bit host+guest. */
+#if TARGET_O_LARGEFILE != 0 || O_LARGEFILE != 0
+ { TARGET_O_LARGEFILE, TARGET_O_LARGEFILE, O_LARGEFILE, O_LARGEFILE, },
+#endif
+ { 0, 0, 0, 0 }
+};
+
+
+/*
+ * Helpers for do_openat, manipulating /proc/self/foo.
+ */
+
+static int open_self_cmdline(void *cpu_env, int fd)
+{
+ CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
+ struct linux_binprm *bprm = ((TaskState *)cpu->opaque)->bprm;
+ int i;
+
+ for (i = 0; i < bprm->argc; i++) {
+ size_t len = strlen(bprm->argv[i]) + 1;
+
+ if (write(fd, bprm->argv[i], len) != len) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int open_self_maps(void *cpu_env, int fd)
+{
+ CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
+ TaskState *ts = cpu->opaque;
+ FILE *fp;
+ char *line = NULL;
+ size_t len = 0;
+ ssize_t read;
+
+ fp = fopen("/proc/self/maps", "r");
+ if (fp == NULL) {
+ return -1;
+ }
+
+ while ((read = getline(&line, &len, fp)) != -1) {
+ int fields, dev_maj, dev_min, inode;
+ uint64_t min, max, offset;
+ char flag_r, flag_w, flag_x, flag_p;
+ char path[512] = "";
+
+ fields = sscanf(line, "%"PRIx64"-%"PRIx64" %c%c%c%c %"
+ PRIx64" %x:%x %d %512s",
+ &min, &max, &flag_r, &flag_w, &flag_x,
+ &flag_p, &offset, &dev_maj, &dev_min, &inode, path);
+
+ if ((fields < 10) || (fields > 11)) {
+ continue;
+ }
+ if (h2g_valid(min)) {
+ int flags = page_get_flags(h2g(min));
+
+ if (!h2g_valid(max - 1)) {
+ max = (uintptr_t)g2h(GUEST_ADDR_MAX) + 1;
+ }
+ if (page_check_range(h2g(min), max - min, flags) == -1) {
+ continue;
+ }
+ if (h2g(min) == ts->info->stack_limit) {
+ pstrcpy(path, sizeof(path), " [stack]");
+ }
+ dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
+ " %c%c%c%c %08" PRIx64 " %02x:%02x %d %s%s\n",
+ h2g(min), h2g(max - 1) + 1, flag_r, flag_w,
+ flag_x, flag_p, offset, dev_maj, dev_min, inode,
+ path[0] ? " " : "", path);
+ }
+ }
+
+ free(line);
+ fclose(fp);
+
+ return 0;
+}
+
+static int open_self_stat(void *cpu_env, int fd)
+{
+ CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
+ TaskState *ts = cpu->opaque;
+ abi_ulong start_stack = ts->info->start_stack;
+ int i;
+
+ for (i = 0; i < 44; i++) {
+ char buf[128];
+ int len;
+ uint64_t val = 0;
+
+ if (i == 0) {
+ /* pid */
+ val = getpid();
+ snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
+ } else if (i == 1) {
+ /* app name */
+ snprintf(buf, sizeof(buf), "(%s) ", ts->bprm->argv[0]);
+ } else if (i == 27) {
+ /* stack bottom */
+ val = start_stack;
+ snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
+ } else {
+ /* for the rest, there is MasterCard */
+ snprintf(buf, sizeof(buf), "0%c", i == 43 ? '\n' : ' ');
+ }
+
+ len = strlen(buf);
+ if (write(fd, buf, len) != len) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int open_self_auxv(void *cpu_env, int fd)
+{
+ CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
+ TaskState *ts = cpu->opaque;
+ abi_ulong auxv = ts->info->saved_auxv;
+ abi_ulong len = ts->info->auxv_len;
+ char *ptr;
+
+ /*
+ * Auxiliary vector is stored in target process stack.
+ * read in whole auxv vector and copy it to file
+ */
+ ptr = lock_user(VERIFY_READ, auxv, len, 0);
+ if (ptr != NULL) {
+ while (len > 0) {
+ ssize_t r;
+ r = write(fd, ptr, len);
+ if (r <= 0) {
+ break;
+ }
+ len -= r;
+ ptr += r;
+ }
+ lseek(fd, 0, SEEK_SET);
+ unlock_user(ptr, auxv, len);
+ }
+
+ return 0;
+}
+
+int is_proc_myself(const char *filename, const char *entry)
+{
+ if (!strncmp(filename, "/proc/", strlen("/proc/"))) {
+ filename += strlen("/proc/");
+ if (!strncmp(filename, "self/", strlen("self/"))) {
+ filename += strlen("self/");
+ } else if (*filename >= '1' && *filename <= '9') {
+ char myself[80];
+ snprintf(myself, sizeof(myself), "%d/", getpid());
+ if (!strncmp(filename, myself, strlen(myself))) {
+ filename += strlen(myself);
+ } else {
+ return 0;
+ }
+ } else {
+ return 0;
+ }
+ if (!strcmp(filename, entry)) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
+static int is_proc(const char *filename, const char *entry)
+{
+ return strcmp(filename, entry) == 0;
+}
+
+static int open_net_route(void *cpu_env, int fd)
+{
+ FILE *fp;
+ char *line = NULL;
+ size_t len = 0;
+ ssize_t read;
+
+ fp = fopen("/proc/net/route", "r");
+ if (fp == NULL) {
+ return -1;
+ }
+
+ /* read header */
+
+ read = getline(&line, &len, fp);
+ dprintf(fd, "%s", line);
+
+ /* read routes */
+
+ while ((read = getline(&line, &len, fp)) != -1) {
+ char iface[16];
+ uint32_t dest, gw, mask;
+ unsigned int flags, refcnt, use, metric, mtu, window, irtt;
+ sscanf(line, "%s\t%08x\t%08x\t%04x\t%d\t%d\t%d\t%08x\t%d\t%u\t%u\n",
+ iface, &dest, &gw, &flags, &refcnt, &use, &metric,
+ &mask, &mtu, &window, &irtt);
+ dprintf(fd, "%s\t%08x\t%08x\t%04x\t%d\t%d\t%d\t%08x\t%d\t%u\t%u\n",
+ iface, tswap32(dest), tswap32(gw), flags, refcnt, use,
+ metric, tswap32(mask), mtu, window, irtt);
+ }
+
+ free(line);
+ fclose(fp);
+
+ return 0;
+}
+#endif
+
+static abi_long do_openat(void *cpu_env, int dirfd, abi_ulong target_path,
+ int target_flags, int mode)
+{
+ struct fake_open {
+ const char *filename;
+ int (*fill)(void *cpu_env, int fd);
+ int (*cmp)(const char *s1, const char *s2);
+ };
+ static const struct fake_open fakes[] = {
+ { "maps", open_self_maps, is_proc_myself },
+ { "stat", open_self_stat, is_proc_myself },
+ { "auxv", open_self_auxv, is_proc_myself },
+ { "cmdline", open_self_cmdline, is_proc_myself },
+#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
+ { "/proc/net/route", open_net_route, is_proc },
+#endif
+ };
+
+ char *pathname = lock_user_string(target_path);
+ int flags = target_to_host_bitmask(target_flags, fcntl_flags_tbl);
+ int i, ret;
+
+ if (!pathname) {
+ return -TARGET_EFAULT;
+ }
+
+ if (is_proc_myself(pathname, "exe")) {
+ ret = qemu_getauxval(AT_EXECFD);
+ if (ret == 0) {
+ ret = get_errno(safe_openat(dirfd, exec_path, flags, mode));
+ }
+ goto done;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(fakes); ++i) {
+ if (fakes[i].cmp(pathname, fakes[i].filename)) {
+ const char *tmpdir;
+ char filename[PATH_MAX];
+ int r;
+
+ /* Create temporary file. */
+ tmpdir = getenv("TMPDIR");
+ if (!tmpdir) {
+ tmpdir = "/tmp";
+ }
+ snprintf(filename, sizeof(filename),
+ "%s/qemu-open.XXXXXX", tmpdir);
+ ret = mkstemp(filename);
+ if (ret < 0) {
+ ret = -TARGET_ENOENT;
+ goto done;
+ }
+ unlink(filename);
+
+ /* Add contents to the temporary file. */
+ r = fakes[i].fill(cpu_env, ret);
+ if (r) {
+ close(ret);
+ ret = -TARGET_ENOENT;
+ goto done;
+ }
+
+ /* Reset pointer to the beginning. */
+ lseek(ret, 0, SEEK_SET);
+ goto done;
+ }
+ }
+ ret = get_errno(safe_openat(dirfd, path(pathname), flags, mode));
+
+ done:
+ fd_trans_unregister(ret);
+ unlock_user(pathname, target_path, 0);
+ return ret;
+}
+
+SYSCALL_IMPL(close)
+{
+ fd_trans_unregister(arg1);
+ return get_errno(close(arg1));
+}
+SYSCALL_DEF(close, ARG_DEC);
+
+#ifdef TARGET_NR_open
+SYSCALL_IMPL(open)
+{
+ return do_openat(cpu_env, AT_FDCWD, arg1, arg2, arg3);
+}
+SYSCALL_DEF(open, ARG_STR, ARG_OPENFLAG, ARG_MODEFLAG);
+#endif
+
+SYSCALL_IMPL(openat)
+{
+ return do_openat(cpu_env, arg1, arg2, arg3, arg4);
+}
+SYSCALL_DEF(openat, ARG_ATDIRFD, ARG_STR, ARG_OPENFLAG, ARG_MODEFLAG);
+
+SYSCALL_IMPL(read)
+{
+ abi_long ret;
+ void *p;
+
+ if (arg3 == 0) {
+ return 0;
+ }
+ p = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+ if (!p) {
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(safe_read(arg1, p, arg3));
+
+ if (!is_error(ret)) {
+ TargetFdDataFunc trans = fd_trans_host_to_target_data(arg1);
+ if (trans) {
+ ret = trans(p, ret);
+ }
+ }
+ unlock_user(p, arg2, ret);
+ return ret;
+}
+SYSCALL_DEF(read, ARG_DEC, ARG_PTR, ARG_DEC);
+
+SYSCALL_IMPL(write)
+{
+ TargetFdDataFunc trans = fd_trans_target_to_host_data(arg1);
+ void *p = lock_user(VERIFY_READ, arg2, arg3, 1);
+ abi_long ret;
+
+ if (!p) {
+ return -TARGET_EFAULT;
+ }
+ if (trans) {
+ void *copy = g_malloc(arg3);
+ memcpy(copy, p, arg3);
+ ret = trans(copy, arg3);
+ if (ret >= 0) {
+ ret = get_errno(safe_write(arg1, copy, ret));
+ }
+ g_free(copy);
+ } else {
+ ret = get_errno(safe_write(arg1, p, arg3));
+ }
+ unlock_user(p, arg2, 0);
+ return ret;
+}
+SYSCALL_DEF(write, ARG_DEC, ARG_PTR, ARG_DEC);
diff --git a/linux-user/Makefile.objs b/linux-user/Makefile.objs
index afa69ed6d2..63b81f50e8 100644
--- a/linux-user/Makefile.objs
+++ b/linux-user/Makefile.objs
@@ -1,4 +1,4 @@
-obj-y = main.o syscall.o strace.o mmap.o signal.o \
+obj-y = main.o syscall.o syscall_file.o strace.o mmap.o signal.o \
elfload.o linuxload.o uaccess.o uname.o \
safe-syscall.o $(TARGET_ABI_DIR)/signal.o \
$(TARGET_ABI_DIR)/cpu_loop.o
@@ -16,4 +16,5 @@ $(SYSCALL_LIST): $(GEN_SYSCALL_LIST)
$(PYTHON) $(GEN_SYSCALL_LIST) $@, "GEN", $(TARGET_DIR)$@)
linux-user/syscall.o \
+linux-user/syscall_file.o \
linux-user/strace.o: $(SYSCALL_LIST)
diff --git a/linux-user/gen_syscall_list.py b/linux-user/gen_syscall_list.py
index 2e0fc39100..3d223e3468 100644
--- a/linux-user/gen_syscall_list.py
+++ b/linux-user/gen_syscall_list.py
@@ -25,10 +25,15 @@ import sys
# These syscalls are supported by all targets.
# Avoiding ifdefs for these can diagnose typos in $cpu/syscall_nr.h
unconditional_syscalls = [
+ "close",
+ "openat",
+ "read",
+ "write",
]
# These syscalls are only supported by some target or abis.
conditional_syscalls = [
+ "open",
]
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 2bc5ba04d4..baafa28370 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -97,9 +97,6 @@
#ifdef TARGET_NR_clone
{ TARGET_NR_clone, "clone" , NULL, print_clone, NULL },
#endif
-#ifdef TARGET_NR_close
-{ TARGET_NR_close, "close" , "%s(%d)", NULL, NULL },
-#endif
#ifdef TARGET_NR_connect
{ TARGET_NR_connect, "connect" , "%s(%d,%#x,%d)", NULL, NULL },
#endif
@@ -677,12 +674,6 @@
#ifdef TARGET_NR_olduname
{ TARGET_NR_olduname, "olduname" , NULL, NULL, NULL },
#endif
-#ifdef TARGET_NR_open
-{ TARGET_NR_open, "open" , NULL, print_open, NULL },
-#endif
-#ifdef TARGET_NR_openat
-{ TARGET_NR_openat, "openat" , NULL, print_openat, NULL },
-#endif
#ifdef TARGET_NR_osf_adjtime
{ TARGET_NR_osf_adjtime, "osf_adjtime" , NULL, NULL, NULL },
#endif
@@ -1076,9 +1067,6 @@
#ifdef TARGET_NR_quotactl
{ TARGET_NR_quotactl, "quotactl" , NULL, NULL, NULL },
#endif
-#ifdef TARGET_NR_read
-{ TARGET_NR_read, "read" , "%s(%d,%#x,%d)", NULL, NULL },
-#endif
#ifdef TARGET_NR_readahead
{ TARGET_NR_readahead, "readahead" , NULL, NULL, NULL },
#endif
@@ -1626,9 +1614,6 @@
#ifdef TARGET_NR_waitpid
{ TARGET_NR_waitpid, "waitpid" , "%s(%d,%p,%#x)", NULL, NULL },
#endif
-#ifdef TARGET_NR_write
-{ TARGET_NR_write, "write" , "%s(%d,%#x,%d)", NULL, NULL },
-#endif
#ifdef TARGET_NR_writev
{ TARGET_NR_writev, "writev" , "%s(%d,%p,%#x)", NULL, NULL },
#endif
--
2.17.1
