#include "qemu/path.h"
#include "qemu/memfd.h"
#include "qemu/queue.h"
+#include "qemu/plugin.h"
+#include "target_mman.h"
#include <elf.h>
#include <endian.h>
#include <grp.h>
#define CLONE_IGNORED_FLAGS \
(CLONE_DETACHED | CLONE_IO)
+#ifndef CLONE_PIDFD
+# define CLONE_PIDFD 0x00001000
+#endif
+
/* Flags for fork which we can implement within QEMU itself */
#define CLONE_OPTIONAL_FORK_FLAGS \
- (CLONE_SETTLS | CLONE_PARENT_SETTID | \
+ (CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_PIDFD | \
CLONE_CHILD_CLEARTID | CLONE_CHILD_SETTID)
/* Flags for thread creation which we can implement within QEMU itself */
#endif
safe_syscall5(int, waitid, idtype_t, idtype, id_t, id, siginfo_t *, infop, \
int, options, struct rusage *, rusage)
+safe_syscall3(int, execve, const char *, filename, char **, argv, char **, envp)
safe_syscall5(int, execveat, int, dirfd, const char *, filename,
char **, argv, char **, envp, int, flags)
#if defined(TARGET_NR_select) || defined(TARGET_NR__newselect) || \
}
static abi_ulong target_brk;
-static abi_ulong target_original_brk;
static abi_ulong brk_page;
void target_set_brk(abi_ulong new_brk)
{
- target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
+ target_brk = TARGET_PAGE_ALIGN(new_brk);
brk_page = HOST_PAGE_ALIGN(target_brk);
}
-//#define DEBUGF_BRK(message, args...) do { fprintf(stderr, (message), ## args); } while (0)
-#define DEBUGF_BRK(message, args...)
-
/* do_brk() must return target values and target errnos. */
-abi_long do_brk(abi_ulong new_brk)
+abi_long do_brk(abi_ulong brk_val)
{
abi_long mapped_addr;
abi_ulong new_alloc_size;
+ abi_ulong new_brk, new_host_brk_page;
/* brk pointers are always untagged */
- DEBUGF_BRK("do_brk(" TARGET_ABI_FMT_lx ") -> ", new_brk);
-
- if (!new_brk) {
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (!new_brk)\n", target_brk);
+ /* return old brk value if brk_val unchanged or zero */
+ if (!brk_val || brk_val == target_brk) {
return target_brk;
}
- if (new_brk < target_original_brk) {
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (new_brk < target_original_brk)\n",
- target_brk);
+
+ new_brk = TARGET_PAGE_ALIGN(brk_val);
+ new_host_brk_page = HOST_PAGE_ALIGN(brk_val);
+
+ /* brk_val and old target_brk might be on the same page */
+ if (new_brk == TARGET_PAGE_ALIGN(target_brk)) {
+ if (brk_val > target_brk) {
+ /* empty remaining bytes in (possibly larger) host page */
+ memset(g2h_untagged(target_brk), 0, new_host_brk_page - target_brk);
+ }
+ target_brk = brk_val;
return target_brk;
}
- /* If the new brk is less than the highest page reserved to the
- * target heap allocation, set it and we're almost done... */
- if (new_brk <= brk_page) {
- /* Heap contents are initialized to zero, as for anonymous
- * mapped pages. */
- if (new_brk > target_brk) {
- memset(g2h_untagged(target_brk), 0, new_brk - target_brk);
- }
- target_brk = new_brk;
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (new_brk <= brk_page)\n", target_brk);
- return target_brk;
+ /* Release heap if necesary */
+ if (new_brk < target_brk) {
+ /* empty remaining bytes in (possibly larger) host page */
+ memset(g2h_untagged(brk_val), 0, new_host_brk_page - brk_val);
+
+ /* free unused host pages and set new brk_page */
+ target_munmap(new_host_brk_page, brk_page - new_host_brk_page);
+ brk_page = new_host_brk_page;
+
+ target_brk = brk_val;
+ return target_brk;
}
/* We need to allocate more memory after the brk... Note that
* itself); instead we treat "mapped but at wrong address" as
* a failure and unmap again.
*/
- new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page);
- mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
+ new_alloc_size = new_host_brk_page - brk_page;
+ if (new_alloc_size) {
+ mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, 0, 0));
+ } else {
+ mapped_addr = brk_page;
+ }
if (mapped_addr == brk_page) {
/* Heap contents are initialized to zero, as for anonymous
* then shrunken). */
memset(g2h_untagged(target_brk), 0, brk_page - target_brk);
- target_brk = new_brk;
- brk_page = HOST_PAGE_ALIGN(target_brk);
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (mapped_addr == brk_page)\n",
- target_brk);
+ target_brk = brk_val;
+ brk_page = new_host_brk_page;
return target_brk;
} else if (mapped_addr != -1) {
/* Mapped but at wrong address, meaning there wasn't actually
*/
target_munmap(mapped_addr, new_alloc_size);
mapped_addr = -1;
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (mapped_addr != -1)\n", target_brk);
- }
- else {
- DEBUGF_BRK(TARGET_ABI_FMT_lx " (otherwise)\n", target_brk);
}
#if defined(TARGET_ALPHA)
lladdr = (struct target_sockaddr_ll *)addr;
lladdr->sll_ifindex = tswap32(lladdr->sll_ifindex);
lladdr->sll_hatype = tswap16(lladdr->sll_hatype);
+ } else if (sa_family == AF_INET6) {
+ struct sockaddr_in6 *in6addr;
+
+ in6addr = (struct sockaddr_in6 *)addr;
+ in6addr->sin6_scope_id = tswap32(in6addr->sin6_scope_id);
}
unlock_user(target_saddr, target_addr, 0);
target_vec, count, send);
if (vec == NULL) {
ret = -host_to_target_errno(errno);
- goto out2;
+ /* allow sending packet without any iov, e.g. with MSG_MORE flag */
+ if (!send || ret) {
+ goto out2;
+ }
}
msg.msg_iovlen = count;
msg.msg_iov = vec;
}
out:
- unlock_iovec(vec, target_vec, count, !send);
+ if (vec) {
+ unlock_iovec(vec, target_vec, count, !send);
+ }
out2:
return ret;
}
abi_long ret;
int host_flags;
- host_flags = target_to_host_bitmask(flags, fcntl_flags_tbl);
+ if (flags & ~(TARGET_SOCK_CLOEXEC | TARGET_SOCK_NONBLOCK)) {
+ return -TARGET_EINVAL;
+ }
+
+ host_flags = 0;
+ if (flags & TARGET_SOCK_NONBLOCK) {
+ host_flags |= SOCK_NONBLOCK;
+ }
+ if (flags & TARGET_SOCK_CLOEXEC) {
+ host_flags |= SOCK_CLOEXEC;
+ }
if (target_addr == 0) {
return get_errno(safe_accept4(fd, NULL, NULL, host_flags));
}
#endif
-static inline abi_ulong do_shmat(CPUArchState *cpu_env,
- int shmid, abi_ulong shmaddr, int shmflg)
+static abi_ulong do_shmat(CPUArchState *cpu_env, int shmid,
+ abi_ulong shmaddr, int shmflg)
{
CPUState *cpu = env_cpu(cpu_env);
- abi_long raddr;
+ abi_ulong raddr;
void *host_raddr;
struct shmid_ds shm_info;
- int i,ret;
+ int i, ret;
abi_ulong shmlba;
/* shmat pointers are always untagged */
if (host_raddr == (void *)-1) {
mmap_unlock();
- return get_errno((long)host_raddr);
+ return get_errno((intptr_t)host_raddr);
}
- raddr=h2g((unsigned long)host_raddr);
+ raddr = h2g((uintptr_t)host_raddr);
- page_set_flags(raddr, raddr + shm_info.shm_segsz,
+ page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
PAGE_VALID | PAGE_RESET | PAGE_READ |
(shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
mmap_unlock();
return raddr;
-
}
static inline abi_long do_shmdt(abi_ulong shmaddr)
for (i = 0; i < N_SHM_REGIONS; ++i) {
if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
shm_regions[i].in_use = false;
- page_set_flags(shmaddr, shmaddr + shm_regions[i].size, 0);
+ page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
break;
}
}
if (ie->target_cmd == 0) {
qemu_log_mask(
LOG_UNIMP, "Unsupported ioctl: cmd=0x%04lx\n", (long)cmd);
- return -TARGET_ENOSYS;
+ return -TARGET_ENOTTY;
}
if (ie->target_cmd == cmd)
break;
} else if (!ie->host_cmd) {
/* Some architectures define BSD ioctls in their headers
that are not implemented in Linux. */
- return -TARGET_ENOSYS;
+ return -TARGET_ENOTTY;
}
switch(arg_type[0]) {
qemu_log_mask(LOG_UNIMP,
"Unsupported ioctl type: cmd=0x%04lx type=%d\n",
(long)cmd, arg_type[0]);
- ret = -TARGET_ENOSYS;
+ ret = -TARGET_ENOTTY;
break;
}
return ret;
.print = print_termios,
};
+/* If the host does not provide these bits, they may be safely discarded. */
+#ifndef MAP_SYNC
+#define MAP_SYNC 0
+#endif
+#ifndef MAP_UNINITIALIZED
+#define MAP_UNINITIALIZED 0
+#endif
+
static const bitmask_transtbl mmap_flags_tbl[] = {
- { TARGET_MAP_SHARED, TARGET_MAP_SHARED, MAP_SHARED, MAP_SHARED },
- { TARGET_MAP_PRIVATE, TARGET_MAP_PRIVATE, MAP_PRIVATE, MAP_PRIVATE },
+ { TARGET_MAP_TYPE, TARGET_MAP_SHARED, MAP_TYPE, MAP_SHARED },
+ { TARGET_MAP_TYPE, TARGET_MAP_PRIVATE, MAP_TYPE, MAP_PRIVATE },
+ { TARGET_MAP_TYPE, TARGET_MAP_SHARED_VALIDATE,
+ MAP_TYPE, MAP_SHARED_VALIDATE },
{ TARGET_MAP_FIXED, TARGET_MAP_FIXED, MAP_FIXED, MAP_FIXED },
{ TARGET_MAP_ANONYMOUS, TARGET_MAP_ANONYMOUS,
MAP_ANONYMOUS, MAP_ANONYMOUS },
Recognize it for the target insofar as we do not want to pass
it through to the host. */
{ TARGET_MAP_STACK, TARGET_MAP_STACK, 0, 0 },
+ { TARGET_MAP_SYNC, TARGET_MAP_SYNC, MAP_SYNC, MAP_SYNC },
+ { TARGET_MAP_NONBLOCK, TARGET_MAP_NONBLOCK, MAP_NONBLOCK, MAP_NONBLOCK },
+ { TARGET_MAP_POPULATE, TARGET_MAP_POPULATE, MAP_POPULATE, MAP_POPULATE },
+ { TARGET_MAP_FIXED_NOREPLACE, TARGET_MAP_FIXED_NOREPLACE,
+ MAP_FIXED_NOREPLACE, MAP_FIXED_NOREPLACE },
+ { TARGET_MAP_UNINITIALIZED, TARGET_MAP_UNINITIALIZED,
+ MAP_UNINITIALIZED, MAP_UNINITIALIZED },
{ 0, 0, 0, 0 }
};
return -TARGET_EINVAL;
}
+#if !defined(__NR_pidfd_open) || !defined(TARGET_NR_pidfd_open)
+ if (flags & CLONE_PIDFD) {
+ return -TARGET_EINVAL;
+ }
+#endif
+
+ /* Can not allow CLONE_PIDFD with CLONE_PARENT_SETTID */
+ if ((flags & CLONE_PIDFD) && (flags & CLONE_PARENT_SETTID)) {
+ return -TARGET_EINVAL;
+ }
+
if (block_signals()) {
return -QEMU_ERESTARTSYS;
}
ts->child_tidptr = child_tidptr;
} else {
cpu_clone_regs_parent(env, flags);
+ if (flags & CLONE_PIDFD) {
+ int pid_fd = 0;
+#if defined(__NR_pidfd_open) && defined(TARGET_NR_pidfd_open)
+ int pid_child = ret;
+ pid_fd = pidfd_open(pid_child, 0);
+ if (pid_fd >= 0) {
+ fcntl(pid_fd, F_SETFD, fcntl(pid_fd, F_GETFL)
+ | FD_CLOEXEC);
+ } else {
+ pid_fd = 0;
+ }
+#endif
+ put_user_u32(pid_fd, parent_tidptr);
+ }
fork_end(0);
}
+ g_assert(!cpu_in_exclusive_context(cpu));
}
return ret;
}
ret = get_errno(safe_fcntl(fd, host_cmd, arg));
if (ret >= 0) {
ret = host_to_target_bitmask(ret, fcntl_flags_tbl);
+ /* tell 32-bit guests it uses largefile on 64-bit hosts: */
+ if (O_LARGEFILE == 0 && HOST_LONG_BITS == 64) {
+ ret |= TARGET_O_LARGEFILE;
+ }
}
break;
}
#endif
+static inline int target_to_host_msync_arg(abi_long arg)
+{
+ return ((arg & TARGET_MS_ASYNC) ? MS_ASYNC : 0) |
+ ((arg & TARGET_MS_INVALIDATE) ? MS_INVALIDATE : 0) |
+ ((arg & TARGET_MS_SYNC) ? MS_SYNC : 0) |
+ (arg & ~(TARGET_MS_ASYNC | TARGET_MS_INVALIDATE | TARGET_MS_SYNC));
+}
+
#if (defined(TARGET_NR_stat64) || defined(TARGET_NR_lstat64) || \
defined(TARGET_NR_fstat64) || defined(TARGET_NR_fstatat64) || \
defined(TARGET_NR_newfstatat))
return 0;
}
-static int open_self_maps(CPUArchState *cpu_env, int fd)
+static void show_smaps(int fd, unsigned long size)
+{
+ unsigned long page_size_kb = TARGET_PAGE_SIZE >> 10;
+ unsigned long size_kb = size >> 10;
+
+ dprintf(fd, "Size: %lu kB\n"
+ "KernelPageSize: %lu kB\n"
+ "MMUPageSize: %lu kB\n"
+ "Rss: 0 kB\n"
+ "Pss: 0 kB\n"
+ "Pss_Dirty: 0 kB\n"
+ "Shared_Clean: 0 kB\n"
+ "Shared_Dirty: 0 kB\n"
+ "Private_Clean: 0 kB\n"
+ "Private_Dirty: 0 kB\n"
+ "Referenced: 0 kB\n"
+ "Anonymous: 0 kB\n"
+ "LazyFree: 0 kB\n"
+ "AnonHugePages: 0 kB\n"
+ "ShmemPmdMapped: 0 kB\n"
+ "FilePmdMapped: 0 kB\n"
+ "Shared_Hugetlb: 0 kB\n"
+ "Private_Hugetlb: 0 kB\n"
+ "Swap: 0 kB\n"
+ "SwapPss: 0 kB\n"
+ "Locked: 0 kB\n"
+ "THPeligible: 0\n", size_kb, page_size_kb, page_size_kb);
+}
+
+static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
{
CPUState *cpu = env_cpu(cpu_env);
TaskState *ts = cpu->opaque;
} else {
dprintf(fd, "\n");
}
+ if (smaps) {
+ show_smaps(fd, max - min);
+ dprintf(fd, "VmFlags:%s%s%s%s%s%s%s%s\n",
+ (flags & PAGE_READ) ? " rd" : "",
+ (flags & PAGE_WRITE_ORG) ? " wr" : "",
+ (flags & PAGE_EXEC) ? " ex" : "",
+ e->is_priv ? "" : " sh",
+ (flags & PAGE_READ) ? " mr" : "",
+ (flags & PAGE_WRITE_ORG) ? " mw" : "",
+ (flags & PAGE_EXEC) ? " me" : "",
+ e->is_priv ? "" : " ms");
+ }
}
}
" --xp 00000000 00:00 0",
TARGET_VSYSCALL_PAGE, TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE);
dprintf(fd, "%*s%s\n", 73 - count, "", "[vsyscall]");
+ if (smaps) {
+ show_smaps(fd, TARGET_PAGE_SIZE);
+ dprintf(fd, "VmFlags: ex\n");
+ }
#endif
return 0;
}
+static int open_self_maps(CPUArchState *cpu_env, int fd)
+{
+ return open_self_maps_1(cpu_env, fd, false);
+}
+
+static int open_self_smaps(CPUArchState *cpu_env, int fd)
+{
+ return open_self_maps_1(cpu_env, fd, true);
+}
+
static int open_self_stat(CPUArchState *cpu_env, int fd)
{
CPUState *cpu = env_cpu(cpu_env);
gchar *bin = g_strrstr(ts->bprm->argv[0], "/");
bin = bin ? bin + 1 : ts->bprm->argv[0];
g_string_printf(buf, "(%.15s) ", bin);
+ } else if (i == 2) {
+ /* task state */
+ g_string_assign(buf, "R "); /* we are running right now */
} else if (i == 3) {
/* ppid */
g_string_printf(buf, FMT_pid " ", getppid());
}
#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN || \
- defined(TARGET_SPARC) || defined(TARGET_M68K) || defined(TARGET_HPPA)
+ defined(TARGET_SPARC) || defined(TARGET_M68K) || defined(TARGET_HPPA) || \
+ defined(TARGET_RISCV) || defined(TARGET_S390X)
static int is_proc(const char *filename, const char *entry)
{
return strcmp(filename, entry) == 0;
}
#endif
+#if defined(TARGET_RISCV)
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int i;
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ RISCVCPU *cpu = env_archcpu(cpu_env);
+ const RISCVCPUConfig *cfg = riscv_cpu_cfg((CPURISCVState *) cpu_env);
+ char *isa_string = riscv_isa_string(cpu);
+ const char *mmu;
+
+ if (cfg->mmu) {
+ mmu = (cpu_env->xl == MXL_RV32) ? "sv32" : "sv48";
+ } else {
+ mmu = "none";
+ }
+
+ for (i = 0; i < num_cpus; i++) {
+ dprintf(fd, "processor\t: %d\n", i);
+ dprintf(fd, "hart\t\t: %d\n", i);
+ dprintf(fd, "isa\t\t: %s\n", isa_string);
+ dprintf(fd, "mmu\t\t: %s\n", mmu);
+ dprintf(fd, "uarch\t\t: qemu\n\n");
+ }
+
+ g_free(isa_string);
+ return 0;
+}
+#endif
+
+#if defined(TARGET_S390X)
+/*
+ * Emulate what a Linux kernel running in qemu-system-s390x -M accel=tcg would
+ * show in /proc/cpuinfo.
+ *
+ * Skip the following in order to match the missing support in op_ecag():
+ * - show_cacheinfo().
+ * - show_cpu_topology().
+ * - show_cpu_mhz().
+ *
+ * Use fixed values for certain fields:
+ * - bogomips per cpu - from a qemu-system-s390x run.
+ * - max thread id = 0, since SMT / SIGP_SET_MULTI_THREADING is not supported.
+ *
+ * Keep the code structure close to arch/s390/kernel/processor.c.
+ */
+
+static void show_facilities(int fd)
+{
+ size_t sizeof_stfl_bytes = 2048;
+ g_autofree uint8_t *stfl_bytes = g_new0(uint8_t, sizeof_stfl_bytes);
+ unsigned int bit;
+
+ dprintf(fd, "facilities :");
+ s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes);
+ for (bit = 0; bit < sizeof_stfl_bytes * 8; bit++) {
+ if (test_be_bit(bit, stfl_bytes)) {
+ dprintf(fd, " %d", bit);
+ }
+ }
+ dprintf(fd, "\n");
+}
+
+static int cpu_ident(unsigned long n)
+{
+ return deposit32(0, CPU_ID_BITS - CPU_PHYS_ADDR_BITS, CPU_PHYS_ADDR_BITS,
+ n);
+}
+
+static void show_cpu_summary(CPUArchState *cpu_env, int fd)
+{
+ S390CPUModel *model = env_archcpu(cpu_env)->model;
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ uint32_t elf_hwcap = get_elf_hwcap();
+ const char *hwcap_str;
+ int i;
+
+ dprintf(fd, "vendor_id : IBM/S390\n"
+ "# processors : %i\n"
+ "bogomips per cpu: 13370.00\n",
+ num_cpus);
+ dprintf(fd, "max thread id : 0\n");
+ dprintf(fd, "features\t: ");
+ for (i = 0; i < sizeof(elf_hwcap) * 8; i++) {
+ if (!(elf_hwcap & (1 << i))) {
+ continue;
+ }
+ hwcap_str = elf_hwcap_str(i);
+ if (hwcap_str) {
+ dprintf(fd, "%s ", hwcap_str);
+ }
+ }
+ dprintf(fd, "\n");
+ show_facilities(fd);
+ for (i = 0; i < num_cpus; i++) {
+ dprintf(fd, "processor %d: "
+ "version = %02X, "
+ "identification = %06X, "
+ "machine = %04X\n",
+ i, model->cpu_ver, cpu_ident(i), model->def->type);
+ }
+}
+
+static void show_cpu_ids(CPUArchState *cpu_env, int fd, unsigned long n)
+{
+ S390CPUModel *model = env_archcpu(cpu_env)->model;
+
+ dprintf(fd, "version : %02X\n", model->cpu_ver);
+ dprintf(fd, "identification : %06X\n", cpu_ident(n));
+ dprintf(fd, "machine : %04X\n", model->def->type);
+}
+
+static void show_cpuinfo(CPUArchState *cpu_env, int fd, unsigned long n)
+{
+ dprintf(fd, "\ncpu number : %ld\n", n);
+ show_cpu_ids(cpu_env, fd, n);
+}
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ int i;
+
+ show_cpu_summary(cpu_env, fd);
+ for (i = 0; i < num_cpus; i++) {
+ show_cpuinfo(cpu_env, fd, i);
+ }
+ return 0;
+}
+#endif
+
#if defined(TARGET_M68K)
static int open_hardware(CPUArchState *cpu_env, int fd)
{
}
#endif
-static int do_openat(CPUArchState *cpu_env, int dirfd, const char *pathname, int flags, mode_t mode)
+int do_guest_openat(CPUArchState *cpu_env, int dirfd, const char *pathname,
+ int flags, mode_t mode, bool safe)
{
struct fake_open {
const char *filename;
const struct fake_open *fake_open;
static const struct fake_open fakes[] = {
{ "maps", open_self_maps, is_proc_myself },
+ { "smaps", open_self_smaps, 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 HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
{ "/proc/net/route", open_net_route, is_proc },
#endif
-#if defined(TARGET_SPARC) || defined(TARGET_HPPA)
+#if defined(TARGET_SPARC) || defined(TARGET_HPPA) || \
+ defined(TARGET_RISCV) || defined(TARGET_S390X)
{ "/proc/cpuinfo", open_cpuinfo, is_proc },
#endif
#if defined(TARGET_M68K)
};
if (is_proc_myself(pathname, "exe")) {
- return safe_openat(dirfd, exec_path, flags, mode);
+ if (safe) {
+ return safe_openat(dirfd, exec_path, flags, mode);
+ } else {
+ return openat(dirfd, exec_path, flags, mode);
+ }
}
for (fake_open = fakes; fake_open->filename; fake_open++) {
return fd;
}
- return safe_openat(dirfd, path(pathname), flags, mode);
+ if (safe) {
+ return safe_openat(dirfd, path(pathname), flags, mode);
+ } else {
+ return openat(dirfd, path(pathname), flags, mode);
+ }
}
-static int do_execveat(CPUArchState *cpu_env, int dirfd,
- abi_long pathname, abi_long guest_argp,
- abi_long guest_envp, int flags)
+ssize_t do_guest_readlink(const char *pathname, char *buf, size_t bufsiz)
+{
+ ssize_t ret;
+
+ if (!pathname || !buf) {
+ errno = EFAULT;
+ return -1;
+ }
+
+ if (!bufsiz) {
+ /* Short circuit this for the magic exe check. */
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (is_proc_myself((const char *)pathname, "exe")) {
+ /*
+ * Don't worry about sign mismatch as earlier mapping
+ * logic would have thrown a bad address error.
+ */
+ ret = MIN(strlen(exec_path), bufsiz);
+ /* We cannot NUL terminate the string. */
+ memcpy(buf, exec_path, ret);
+ } else {
+ ret = readlink(path(pathname), buf, bufsiz);
+ }
+
+ return ret;
+}
+
+static int do_execv(CPUArchState *cpu_env, int dirfd,
+ abi_long pathname, abi_long guest_argp,
+ abi_long guest_envp, int flags, bool is_execveat)
{
int ret;
char **argp, **envp;
goto execve_efault;
}
+ const char *exe = p;
if (is_proc_myself(p, "exe")) {
- ret = get_errno(safe_execveat(dirfd, exec_path, argp, envp, flags));
- } else {
- ret = get_errno(safe_execveat(dirfd, p, argp, envp, flags));
+ exe = exec_path;
}
+ ret = is_execveat
+ ? safe_execveat(dirfd, exe, argp, envp, flags)
+ : safe_execve(exe, argp, envp);
+ ret = get_errno(ret);
unlock_user(p, pathname, 0);
}
#endif /* TARGET_NR_getdents64 */
+#if defined(TARGET_NR_riscv_hwprobe)
+
+#define RISCV_HWPROBE_KEY_MVENDORID 0
+#define RISCV_HWPROBE_KEY_MARCHID 1
+#define RISCV_HWPROBE_KEY_MIMPID 2
+
+#define RISCV_HWPROBE_KEY_BASE_BEHAVIOR 3
+#define RISCV_HWPROBE_BASE_BEHAVIOR_IMA (1 << 0)
+
+#define RISCV_HWPROBE_KEY_IMA_EXT_0 4
+#define RISCV_HWPROBE_IMA_FD (1 << 0)
+#define RISCV_HWPROBE_IMA_C (1 << 1)
+
+#define RISCV_HWPROBE_KEY_CPUPERF_0 5
+#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
+#define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0)
+#define RISCV_HWPROBE_MISALIGNED_SLOW (2 << 0)
+#define RISCV_HWPROBE_MISALIGNED_FAST (3 << 0)
+#define RISCV_HWPROBE_MISALIGNED_UNSUPPORTED (4 << 0)
+#define RISCV_HWPROBE_MISALIGNED_MASK (7 << 0)
+
+struct riscv_hwprobe {
+ abi_llong key;
+ abi_ullong value;
+};
+
+static void risc_hwprobe_fill_pairs(CPURISCVState *env,
+ struct riscv_hwprobe *pair,
+ size_t pair_count)
+{
+ const RISCVCPUConfig *cfg = riscv_cpu_cfg(env);
+
+ for (; pair_count > 0; pair_count--, pair++) {
+ abi_llong key;
+ abi_ullong value;
+ __put_user(0, &pair->value);
+ __get_user(key, &pair->key);
+ switch (key) {
+ case RISCV_HWPROBE_KEY_MVENDORID:
+ __put_user(cfg->mvendorid, &pair->value);
+ break;
+ case RISCV_HWPROBE_KEY_MARCHID:
+ __put_user(cfg->marchid, &pair->value);
+ break;
+ case RISCV_HWPROBE_KEY_MIMPID:
+ __put_user(cfg->mimpid, &pair->value);
+ break;
+ case RISCV_HWPROBE_KEY_BASE_BEHAVIOR:
+ value = riscv_has_ext(env, RVI) &&
+ riscv_has_ext(env, RVM) &&
+ riscv_has_ext(env, RVA) ?
+ RISCV_HWPROBE_BASE_BEHAVIOR_IMA : 0;
+ __put_user(value, &pair->value);
+ break;
+ case RISCV_HWPROBE_KEY_IMA_EXT_0:
+ value = riscv_has_ext(env, RVF) &&
+ riscv_has_ext(env, RVD) ?
+ RISCV_HWPROBE_IMA_FD : 0;
+ value |= riscv_has_ext(env, RVC) ?
+ RISCV_HWPROBE_IMA_C : pair->value;
+ __put_user(value, &pair->value);
+ break;
+ case RISCV_HWPROBE_KEY_CPUPERF_0:
+ __put_user(RISCV_HWPROBE_MISALIGNED_FAST, &pair->value);
+ break;
+ default:
+ __put_user(-1, &pair->key);
+ break;
+ }
+ }
+}
+
+static int cpu_set_valid(abi_long arg3, abi_long arg4)
+{
+ int ret, i, tmp;
+ size_t host_mask_size, target_mask_size;
+ unsigned long *host_mask;
+
+ /*
+ * cpu_set_t represent CPU masks as bit masks of type unsigned long *.
+ * arg3 contains the cpu count.
+ */
+ tmp = (8 * sizeof(abi_ulong));
+ target_mask_size = ((arg3 + tmp - 1) / tmp) * sizeof(abi_ulong);
+ host_mask_size = (target_mask_size + (sizeof(*host_mask) - 1)) &
+ ~(sizeof(*host_mask) - 1);
+
+ host_mask = alloca(host_mask_size);
+
+ ret = target_to_host_cpu_mask(host_mask, host_mask_size,
+ arg4, target_mask_size);
+ if (ret != 0) {
+ return ret;
+ }
+
+ for (i = 0 ; i < host_mask_size / sizeof(*host_mask); i++) {
+ if (host_mask[i] != 0) {
+ return 0;
+ }
+ }
+ return -TARGET_EINVAL;
+}
+
+static abi_long do_riscv_hwprobe(CPUArchState *cpu_env, abi_long arg1,
+ abi_long arg2, abi_long arg3,
+ abi_long arg4, abi_long arg5)
+{
+ int ret;
+ struct riscv_hwprobe *host_pairs;
+
+ /* flags must be 0 */
+ if (arg5 != 0) {
+ return -TARGET_EINVAL;
+ }
+
+ /* check cpu_set */
+ if (arg3 != 0) {
+ ret = cpu_set_valid(arg3, arg4);
+ if (ret != 0) {
+ return ret;
+ }
+ } else if (arg4 != 0) {
+ return -TARGET_EINVAL;
+ }
+
+ /* no pairs */
+ if (arg2 == 0) {
+ return 0;
+ }
+
+ host_pairs = lock_user(VERIFY_WRITE, arg1,
+ sizeof(*host_pairs) * (size_t)arg2, 0);
+ if (host_pairs == NULL) {
+ return -TARGET_EFAULT;
+ }
+ risc_hwprobe_fill_pairs(cpu_env, host_pairs, arg2);
+ unlock_user(host_pairs, arg1, sizeof(*host_pairs) * (size_t)arg2);
+ return 0;
+}
+#endif /* TARGET_NR_riscv_hwprobe */
+
#if defined(TARGET_NR_pivot_root) && defined(__NR_pivot_root)
_syscall2(int, pivot_root, const char *, new_root, const char *, put_old)
#endif
+#if defined(TARGET_NR_open_tree) && defined(__NR_open_tree)
+#define __NR_sys_open_tree __NR_open_tree
+_syscall3(int, sys_open_tree, int, __dfd, const char *, __filename,
+ unsigned int, __flags)
+#endif
+
+#if defined(TARGET_NR_move_mount) && defined(__NR_move_mount)
+#define __NR_sys_move_mount __NR_move_mount
+_syscall5(int, sys_move_mount, int, __from_dfd, const char *, __from_pathname,
+ int, __to_dfd, const char *, __to_pathname, unsigned int, flag)
+#endif
+
/* This is an internal helper for do_syscall so that it is easier
* to have a single return point, so that actions, such as logging
* of syscall results, can be performed.
case TARGET_NR_open:
if (!(p = lock_user_string(arg1)))
return -TARGET_EFAULT;
- ret = get_errno(do_openat(cpu_env, AT_FDCWD, p,
+ ret = get_errno(do_guest_openat(cpu_env, AT_FDCWD, p,
target_to_host_bitmask(arg2, fcntl_flags_tbl),
- arg3));
+ arg3, true));
fd_trans_unregister(ret);
unlock_user(p, arg1, 0);
return ret;
case TARGET_NR_openat:
if (!(p = lock_user_string(arg2)))
return -TARGET_EFAULT;
- ret = get_errno(do_openat(cpu_env, arg1, p,
+ ret = get_errno(do_guest_openat(cpu_env, arg1, p,
target_to_host_bitmask(arg3, fcntl_flags_tbl),
- arg4));
+ arg4, true));
fd_trans_unregister(ret);
unlock_user(p, arg2, 0);
return ret;
return ret;
#endif
case TARGET_NR_execveat:
- return do_execveat(cpu_env, arg1, arg2, arg3, arg4, arg5);
+ return do_execv(cpu_env, arg1, arg2, arg3, arg4, arg5, true);
case TARGET_NR_execve:
- return do_execveat(cpu_env, AT_FDCWD, arg1, arg2, arg3, 0);
+ return do_execv(cpu_env, AT_FDCWD, arg1, arg2, arg3, 0, false);
case TARGET_NR_chdir:
if (!(p = lock_user_string(arg1)))
return -TARGET_EFAULT;
unlock_user(p, arg1, 0);
return ret;
#endif
+#if defined(TARGET_NR_move_mount) && defined(__NR_move_mount)
+ case TARGET_NR_move_mount:
+ {
+ void *p2, *p4;
+
+ if (!arg2 || !arg4) {
+ return -TARGET_EFAULT;
+ }
+
+ p2 = lock_user_string(arg2);
+ if (!p2) {
+ return -TARGET_EFAULT;
+ }
+
+ p4 = lock_user_string(arg4);
+ if (!p4) {
+ unlock_user(p2, arg2, 0);
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(sys_move_mount(arg1, p2, arg3, p4, arg5));
+
+ unlock_user(p2, arg2, 0);
+ unlock_user(p4, arg4, 0);
+
+ return ret;
+ }
+#endif
+#if defined(TARGET_NR_open_tree) && defined(__NR_open_tree)
+ case TARGET_NR_open_tree:
+ {
+ void *p2;
+ int host_flags;
+
+ if (!arg2) {
+ return -TARGET_EFAULT;
+ }
+
+ p2 = lock_user_string(arg2);
+ if (!p2) {
+ return -TARGET_EFAULT;
+ }
+
+ host_flags = arg3 & ~TARGET_O_CLOEXEC;
+ if (arg3 & TARGET_O_CLOEXEC) {
+ host_flags |= O_CLOEXEC;
+ }
+
+ ret = get_errno(sys_open_tree(arg1, p2, host_flags));
+
+ unlock_user(p2, arg2, 0);
+
+ return ret;
+ }
+#endif
#ifdef TARGET_NR_stime /* not on alpha */
case TARGET_NR_stime:
{
void *p2;
p = lock_user_string(arg1);
p2 = lock_user(VERIFY_WRITE, arg2, arg3, 0);
- if (!p || !p2) {
- ret = -TARGET_EFAULT;
- } else if (!arg3) {
- /* Short circuit this for the magic exe check. */
- ret = -TARGET_EINVAL;
- } else if (is_proc_myself((const char *)p, "exe")) {
- char real[PATH_MAX], *temp;
- temp = realpath(exec_path, real);
- /* Return value is # of bytes that we wrote to the buffer. */
- if (temp == NULL) {
- ret = get_errno(-1);
- } else {
- /* Don't worry about sign mismatch as earlier mapping
- * logic would have thrown a bad address error. */
- ret = MIN(strlen(real), arg3);
- /* We cannot NUL terminate the string. */
- memcpy(p2, real, ret);
- }
- } else {
- ret = get_errno(readlink(path(p), p2, arg3));
- }
+ ret = get_errno(do_guest_readlink(p, p2, arg3));
unlock_user(p2, arg2, ret);
unlock_user(p, arg1, 0);
}
/* Short circuit this for the magic exe check. */
ret = -TARGET_EINVAL;
} else if (is_proc_myself((const char *)p, "exe")) {
- char real[PATH_MAX], *temp;
- temp = realpath(exec_path, real);
- /* Return value is # of bytes that we wrote to the buffer. */
- if (temp == NULL) {
- ret = get_errno(-1);
- } else {
- /* Don't worry about sign mismatch as earlier mapping
- * logic would have thrown a bad address error. */
- ret = MIN(strlen(real), arg4);
- /* We cannot NUL terminate the string. */
- memcpy(p2, real, ret);
- }
+ /*
+ * Don't worry about sign mismatch as earlier mapping
+ * logic would have thrown a bad address error.
+ */
+ ret = MIN(strlen(exec_path), arg4);
+ /* We cannot NUL terminate the string. */
+ memcpy(p2, exec_path, ret);
} else {
ret = get_errno(readlinkat(arg1, path(p), p2, arg4));
}
#endif
ret = target_mmap(arg1, arg2, arg3,
target_to_host_bitmask(arg4, mmap_flags_tbl),
- arg5, arg6 << MMAP_SHIFT);
+ arg5, (off_t)(abi_ulong)arg6 << MMAP_SHIFT);
return get_errno(ret);
#endif
case TARGET_NR_munmap:
/* ??? msync/mlock/munlock are broken for softmmu. */
#ifdef TARGET_NR_msync
case TARGET_NR_msync:
- return get_errno(msync(g2h(cpu, arg1), arg2, arg3));
+ return get_errno(msync(g2h(cpu, arg1), arg2,
+ target_to_host_msync_arg(arg3)));
#endif
#ifdef TARGET_NR_mlock
case TARGET_NR_mlock:
case TARGET_NR_setregid:
return get_errno(setregid(low2highgid(arg1), low2highgid(arg2)));
case TARGET_NR_getgroups:
- {
+ { /* the same code as for TARGET_NR_getgroups32 */
int gidsetsize = arg1;
target_id *target_grouplist;
- gid_t *grouplist;
+ g_autofree gid_t *grouplist = NULL;
int i;
- grouplist = alloca(gidsetsize * sizeof(gid_t));
+ if (gidsetsize > NGROUPS_MAX || gidsetsize < 0) {
+ return -TARGET_EINVAL;
+ }
+ if (gidsetsize > 0) {
+ grouplist = g_try_new(gid_t, gidsetsize);
+ if (!grouplist) {
+ return -TARGET_ENOMEM;
+ }
+ }
ret = get_errno(getgroups(gidsetsize, grouplist));
- if (gidsetsize == 0)
- return ret;
- if (!is_error(ret)) {
- target_grouplist = lock_user(VERIFY_WRITE, arg2, gidsetsize * sizeof(target_id), 0);
- if (!target_grouplist)
+ if (!is_error(ret) && gidsetsize > 0) {
+ target_grouplist = lock_user(VERIFY_WRITE, arg2,
+ gidsetsize * sizeof(target_id), 0);
+ if (!target_grouplist) {
return -TARGET_EFAULT;
- for(i = 0;i < ret; i++)
+ }
+ for (i = 0; i < ret; i++) {
target_grouplist[i] = tswapid(high2lowgid(grouplist[i]));
- unlock_user(target_grouplist, arg2, gidsetsize * sizeof(target_id));
+ }
+ unlock_user(target_grouplist, arg2,
+ gidsetsize * sizeof(target_id));
}
+ return ret;
}
- return ret;
case TARGET_NR_setgroups:
- {
+ { /* the same code as for TARGET_NR_setgroups32 */
int gidsetsize = arg1;
target_id *target_grouplist;
- gid_t *grouplist = NULL;
+ g_autofree gid_t *grouplist = NULL;
int i;
- if (gidsetsize) {
- grouplist = alloca(gidsetsize * sizeof(gid_t));
- target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * sizeof(target_id), 1);
+
+ if (gidsetsize > NGROUPS_MAX || gidsetsize < 0) {
+ return -TARGET_EINVAL;
+ }
+ if (gidsetsize > 0) {
+ grouplist = g_try_new(gid_t, gidsetsize);
+ if (!grouplist) {
+ return -TARGET_ENOMEM;
+ }
+ target_grouplist = lock_user(VERIFY_READ, arg2,
+ gidsetsize * sizeof(target_id), 1);
if (!target_grouplist) {
return -TARGET_EFAULT;
}
for (i = 0; i < gidsetsize; i++) {
grouplist[i] = low2highgid(tswapid(target_grouplist[i]));
}
- unlock_user(target_grouplist, arg2, 0);
+ unlock_user(target_grouplist, arg2,
+ gidsetsize * sizeof(target_id));
}
return get_errno(setgroups(gidsetsize, grouplist));
}
#endif
#ifdef TARGET_NR_getgroups32
case TARGET_NR_getgroups32:
- {
+ { /* the same code as for TARGET_NR_getgroups */
int gidsetsize = arg1;
uint32_t *target_grouplist;
- gid_t *grouplist;
+ g_autofree gid_t *grouplist = NULL;
int i;
- grouplist = alloca(gidsetsize * sizeof(gid_t));
+ if (gidsetsize > NGROUPS_MAX || gidsetsize < 0) {
+ return -TARGET_EINVAL;
+ }
+ if (gidsetsize > 0) {
+ grouplist = g_try_new(gid_t, gidsetsize);
+ if (!grouplist) {
+ return -TARGET_ENOMEM;
+ }
+ }
ret = get_errno(getgroups(gidsetsize, grouplist));
- if (gidsetsize == 0)
- return ret;
- if (!is_error(ret)) {
- target_grouplist = lock_user(VERIFY_WRITE, arg2, gidsetsize * 4, 0);
+ if (!is_error(ret) && gidsetsize > 0) {
+ target_grouplist = lock_user(VERIFY_WRITE, arg2,
+ gidsetsize * 4, 0);
if (!target_grouplist) {
return -TARGET_EFAULT;
}
- for(i = 0;i < ret; i++)
+ for (i = 0; i < ret; i++) {
target_grouplist[i] = tswap32(grouplist[i]);
+ }
unlock_user(target_grouplist, arg2, gidsetsize * 4);
}
+ return ret;
}
- return ret;
#endif
#ifdef TARGET_NR_setgroups32
case TARGET_NR_setgroups32:
- {
+ { /* the same code as for TARGET_NR_setgroups */
int gidsetsize = arg1;
uint32_t *target_grouplist;
- gid_t *grouplist;
+ g_autofree gid_t *grouplist = NULL;
int i;
- grouplist = alloca(gidsetsize * sizeof(gid_t));
- target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 4, 1);
- if (!target_grouplist) {
- return -TARGET_EFAULT;
+ if (gidsetsize > NGROUPS_MAX || gidsetsize < 0) {
+ return -TARGET_EINVAL;
+ }
+ if (gidsetsize > 0) {
+ grouplist = g_try_new(gid_t, gidsetsize);
+ if (!grouplist) {
+ return -TARGET_ENOMEM;
+ }
+ target_grouplist = lock_user(VERIFY_READ, arg2,
+ gidsetsize * 4, 1);
+ if (!target_grouplist) {
+ return -TARGET_EFAULT;
+ }
+ for (i = 0; i < gidsetsize; i++) {
+ grouplist[i] = tswap32(target_grouplist[i]);
+ }
+ unlock_user(target_grouplist, arg2, 0);
}
- for(i = 0;i < gidsetsize; i++)
- grouplist[i] = tswap32(target_grouplist[i]);
- unlock_user(target_grouplist, arg2, 0);
return get_errno(setgroups(gidsetsize, grouplist));
}
#endif
#ifdef TARGET_NR_mincore
case TARGET_NR_mincore:
{
- void *a = lock_user(VERIFY_READ, arg1, arg2, 0);
+ void *a = lock_user(VERIFY_NONE, arg1, arg2, 0);
if (!a) {
return -TARGET_ENOMEM;
}
if (!lock_user_struct(VERIFY_READ, target_rnew, arg3, 1)) {
return -TARGET_EFAULT;
}
- rnew.rlim_cur = tswap64(target_rnew->rlim_cur);
- rnew.rlim_max = tswap64(target_rnew->rlim_max);
+ __get_user(rnew.rlim_cur, &target_rnew->rlim_cur);
+ __get_user(rnew.rlim_max, &target_rnew->rlim_max);
unlock_user_struct(target_rnew, arg3, 0);
rnewp = &rnew;
}
if (!lock_user_struct(VERIFY_WRITE, target_rold, arg4, 1)) {
return -TARGET_EFAULT;
}
- target_rold->rlim_cur = tswap64(rold.rlim_cur);
- target_rold->rlim_max = tswap64(rold.rlim_max);
+ __put_user(rold.rlim_cur, &target_rold->rlim_cur);
+ __put_user(rold.rlim_max, &target_rold->rlim_max);
unlock_user_struct(target_rold, arg4, 1);
}
return ret;
#if defined(TARGET_NR_timerfd_create) && defined(CONFIG_TIMERFD)
case TARGET_NR_timerfd_create:
- return get_errno(timerfd_create(arg1,
- target_to_host_bitmask(arg2, fcntl_flags_tbl)));
+ ret = get_errno(timerfd_create(arg1,
+ target_to_host_bitmask(arg2, fcntl_flags_tbl)));
+ if (ret >= 0) {
+ fd_trans_register(ret, &target_timerfd_trans);
+ }
+ return ret;
#endif
#if defined(TARGET_NR_timerfd_gettime) && defined(CONFIG_TIMERFD)
return ret;
#endif
+#if defined(TARGET_NR_riscv_hwprobe)
+ case TARGET_NR_riscv_hwprobe:
+ return do_riscv_hwprobe(cpu_env, arg1, arg2, arg3, arg4, arg5);
+#endif
+
default:
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
return -TARGET_ENOSYS;
projects / mirror_qemu.git / blobdiff