@@ -34,3 +34,4 @@ Contents:
clocks
qom
block-coroutine-wrapper
+ ios
new file mode 100644
@@ -0,0 +1,28 @@
+===========
+iOS Support
+===========
+
+To run qemu on the iOS platform, some modifications were required. Most of the
+modifications are conditioned on the ``CONFIG_IOS`` and configuration variable.
+
+Build support
+-------------
+
+For the code to compile, certain changes in the block driver and the slirp
+driver had to be made. There is no ``system()`` call, so it has been replaced
+with an assertion error. There should be no code path that call system() from
+iOS.
+
+``ucontext`` support is broken on iOS. The implementation from ``libucontext``
+is used instead.
+
+JIT support
+-----------
+
+On iOS, allocating RWX pages require special entitlements not usually granted to
+apps. However, it is possible to use `bulletproof JIT`_ with a development
+certificate. This means that we need to allocate one chunk of memory with RX
+permissions and then mirror map the same memory with RW permissions. We generate
+code to the mirror mapping and execute the original mapping.
+
+.. _bulletproof JIT: https://www.blackhat.com/docs/us-16/materials/us-16-Krstic.pdf
@@ -557,6 +557,19 @@ EOF
compile_object
}
+check_ios() {
+ cat > $TMPC <<EOF
+#ifdef __APPLE__
+#import "TargetConditionals.h"
+#if !TARGET_OS_IPHONE
+#error TARGET_OS_IPHONE not true
+#endif
+#endif
+int main(void) { return 0; }
+EOF
+ compile_object
+}
+
check_include() {
cat > $TMPC <<EOF
#include <$1>
@@ -599,7 +612,11 @@ elif check_define __DragonFly__ ; then
elif check_define __NetBSD__; then
targetos='NetBSD'
elif check_define __APPLE__; then
- targetos='Darwin'
+ if check_ios ; then
+ targetos='iOS'
+ else
+ targetos='Darwin'
+ fi
else
# This is a fatal error, but don't report it yet, because we
# might be going to just print the --help text, or it might
@@ -777,6 +794,22 @@ Darwin)
# won't work when we're compiling with gcc as a C compiler.
QEMU_CFLAGS="-DOS_OBJECT_USE_OBJC=0 $QEMU_CFLAGS"
;;
+iOS)
+ bsd="yes"
+ darwin="yes"
+ ios="yes"
+ if [ "$cpu" = "x86_64" ] ; then
+ QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
+ QEMU_LDFLAGS="-arch x86_64 $QEMU_LDFLAGS"
+ fi
+ host_block_device_support="no"
+ audio_drv_list=""
+ audio_possible_drivers=""
+ QEMU_LDFLAGS="-framework CoreFoundation $QEMU_LDFLAGS"
+ # Disable attempts to use ObjectiveC features in os/object.h since they
+ # won't work when we're compiling with gcc as a C compiler.
+ QEMU_CFLAGS="-DOS_OBJECT_USE_OBJC=0 $QEMU_CFLAGS"
+;;
SunOS)
solaris="yes"
make="${MAKE-gmake}"
@@ -5962,6 +5995,10 @@ if test "$darwin" = "yes" ; then
echo "CONFIG_DARWIN=y" >> $config_host_mak
fi
+if test "$ios" = "yes" ; then
+ echo "CONFIG_IOS=y" >> $config_host_mak
+fi
+
if test "$solaris" = "yes" ; then
echo "CONFIG_SOLARIS=y" >> $config_host_mak
fi
@@ -6926,6 +6963,7 @@ echo "cpp_link_args = [${LDFLAGS:+$(meson_quote $LDFLAGS)}]" >> $cross
echo "[binaries]" >> $cross
echo "c = [$(meson_quote $cc)]" >> $cross
test -n "$cxx" && echo "cpp = [$(meson_quote $cxx)]" >> $cross
+test -n "$objcc" && echo "objc = [$(meson_quote $objcc)]" >> $cross
echo "ar = [$(meson_quote $ar)]" >> $cross
echo "nm = [$(meson_quote $nm)]" >> $cross
echo "pkgconfig = [$(meson_quote $pkg_config_exe)]" >> $cross
@@ -6944,6 +6982,9 @@ if test "$cross_compile" = "yes"; then
if test "$linux" = "yes" ; then
echo "system = 'linux'" >> $cross
fi
+ if test "$darwin" = "yes" ; then
+ echo "system = 'darwin'" >> $cross
+ fi
case "$ARCH" in
i386|x86_64)
echo "cpu_family = 'x86'" >> $cross
@@ -176,7 +176,7 @@ if targetos == 'windows'
include_directories: include_directories('.'))
elif targetos == 'darwin'
coref = dependency('appleframeworks', modules: 'CoreFoundation')
- iokit = dependency('appleframeworks', modules: 'IOKit')
+ iokit = dependency('appleframeworks', modules: 'IOKit', required: 'CONFIG_IOS' not in config_host)
cocoa = dependency('appleframeworks', modules: 'Cocoa', required: get_option('cocoa'))
elif targetos == 'sunos'
socket = [cc.find_library('socket'),
@@ -686,4 +686,15 @@ char *qemu_get_host_name(Error **errp);
*/
size_t qemu_get_host_physmem(void);
+/**
+ * iOS does not support system() so we replace it with an assertion failure.
+ */
+#ifdef CONFIG_IOS
+#define system ios_does_not_support_system
+static inline int ios_does_not_support_system(const char *command)
+{
+ assert(0);
+}
+#endif /* CONFIG_IOS */
+
#endif
@@ -53,7 +53,7 @@
#ifdef CONFIG_BSD
#include <sys/ioctl.h>
#include <sys/queue.h>
-#ifndef __DragonFly__
+#if !defined(__DragonFly__) && !defined(CONFIG_IOS)
#include <sys/disk.h>
#endif
#endif
@@ -181,7 +181,17 @@ typedef struct BDRVRawReopenState {
bool check_cache_dropped;
} BDRVRawReopenState;
-static int fd_open(BlockDriverState *bs);
+static int fd_open(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+
+ /* this is just to ensure s->fd is sane (its called by io ops) */
+ if (s->fd >= 0) {
+ return 0;
+ }
+ return -EIO;
+}
+
static int64_t raw_getlength(BlockDriverState *bs);
typedef struct RawPosixAIOData {
@@ -252,6 +262,12 @@ static int raw_normalize_devicepath(const char **filename, Error **errp)
}
#endif
+#if defined(CONFIG_IOS)
+static int probe_logical_blocksize(int fd, unsigned int *sector_size_p)
+{
+ return -ENOTSUP; /* not supported on iOS */
+}
+#else /* CONFIG_IOS */
/*
* Get logical block size via ioctl. On success store it in @sector_size_p.
*/
@@ -284,6 +300,7 @@ static int probe_logical_blocksize(int fd, unsigned int *sector_size_p)
return success ? 0 : -errno;
}
+#endif /* !CONFIG_IOS */
/**
* Get physical block size of @fd.
@@ -2306,7 +2323,7 @@ again:
}
if (size == 0)
#endif
-#if defined(__APPLE__) && defined(__MACH__)
+#if !defined(CONFIG_IOS) && defined(__APPLE__) && defined(__MACH__)
{
uint64_t sectors = 0;
uint32_t sector_size = 0;
@@ -3543,16 +3560,6 @@ hdev_co_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
}
#endif /* linux */
-static int fd_open(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- /* this is just to ensure s->fd is sane (its called by io ops) */
- if (s->fd >= 0)
- return 0;
- return -EIO;
-}
-
static coroutine_fn int
hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
{
@@ -27,7 +27,7 @@
#include "net/slirp.h"
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
#include <pwd.h>
#include <sys/wait.h>
#endif
@@ -90,7 +90,7 @@ typedef struct SlirpState {
Slirp *slirp;
Notifier poll_notifier;
Notifier exit_notifier;
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
gchar *smb_dir;
#endif
GSList *fwd;
@@ -103,7 +103,7 @@ static QTAILQ_HEAD(, SlirpState) slirp_stacks =
static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp);
static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp);
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
static int slirp_smb(SlirpState *s, const char *exported_dir,
struct in_addr vserver_addr, Error **errp);
static void slirp_smb_cleanup(SlirpState *s);
@@ -368,7 +368,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
struct in6_addr ip6_prefix;
struct in6_addr ip6_host;
struct in6_addr ip6_dns;
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
struct in_addr smbsrv = { .s_addr = 0 };
#endif
NetClientState *nc;
@@ -478,7 +478,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
return -1;
}
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
error_setg(errp, "Failed to parse SMB address");
return -1;
@@ -593,7 +593,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
}
}
}
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
if (smb_export) {
if (slirp_smb(s, smb_export, smbsrv, errp) < 0) {
goto error;
@@ -785,7 +785,7 @@ void hmp_hostfwd_add(Monitor *mon, const QDict *qdict)
}
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_IOS)
/* automatic user mode samba server configuration */
static void slirp_smb_cleanup(SlirpState *s)
@@ -900,7 +900,7 @@ static int slirp_smb(SlirpState* s, const char *exported_dir,
return 0;
}
-#endif /* !defined(_WIN32) */
+#endif /* !defined(_WIN32) && !defined(CONFIG_IOS) */
static int guestfwd_can_read(void *opaque)
{
@@ -34,6 +34,12 @@
#ifndef CONFIG_HAS_ENVIRON
#ifdef __APPLE__
+#include "TargetConditionals.h"
+#if !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
+#define APPLE_USE_CRT_EXTERNS
+#endif
+#endif
+#ifdef APPLE_USE_CRT_EXTERNS
#include <crt_externs.h>
#define environ (*_NSGetEnviron())
#else
@@ -528,6 +528,13 @@ F: include/*/*win32*
X: qga/*win32*
F: qemu.nsi
+IOS
+M: Joelle van Dyne <j@getutm.app>
+S: Maintained
+K: ^Subject:.*(?i)iOS
+F: docs/devel/ios.rst
+F: include/tcg/tcg-apple-jit.h
+
Alpha Machines
--------------
M: Richard Henderson <rth@twiddle.net>
@@ -46,12 +46,11 @@ qtests_i386 = \
(config_all_devices.has_key('CONFIG_TPM_TIS_ISA') ? ['tpm-tis-test'] : []) + \
(config_all_devices.has_key('CONFIG_TPM_TIS_ISA') ? ['tpm-tis-swtpm-test'] : []) + \
(config_all_devices.has_key('CONFIG_RTL8139_PCI') ? ['rtl8139-test'] : []) + \
+ (not config_host.has_key('CONFIG_IOS') ? ['bios-tables-test', 'hd-geo-test'] : []) + \
qtests_pci + \
['fdc-test',
'ide-test',
- 'hd-geo-test',
'boot-order-test',
- 'bios-tables-test',
'rtc-test',
'i440fx-test',
'fuzz-test',
@@ -148,9 +147,9 @@ qtests_arm = \
'boot-serial-test',
'hexloader-test']
-# TODO: once aarch64 TCG is fixed on ARM 32 bit host, make bios-tables-test unconditional
+# TODO: once aarch64 TCG is fixed on ARM 32 bit host, make bios-tables-test unconditional (except on iOS)
qtests_aarch64 = \
- (cpu != 'arm' ? ['bios-tables-test'] : []) + \
+ (cpu != 'arm' and not config_host.has_key('CONFIG_IOS') ? ['bios-tables-test'] : []) + \
(config_all_devices.has_key('CONFIG_TPM_TIS_SYSBUS') ? ['tpm-tis-device-test'] : []) + \
(config_all_devices.has_key('CONFIG_TPM_TIS_SYSBUS') ? ['tpm-tis-device-swtpm-test'] : []) + \
['arm-cpu-features',
This introduces support for building for iOS hosts. When the correct Xcode toolchain is used, iOS host will be detected automatically. * block: disable features not supported by iOS sandbox * slirp: disable SMB features for iOS * osdep: disable system() calls for iOS Signed-off-by: Joelle van Dyne <j@getutm.app> --- docs/devel/index.rst | 1 + docs/devel/ios.rst | 28 +++++++++++++++++++++++++++ configure | 43 ++++++++++++++++++++++++++++++++++++++++- meson.build | 2 +- include/qemu/osdep.h | 11 +++++++++++ block.c | 2 +- block/file-posix.c | 31 +++++++++++++++++------------ net/slirp.c | 16 +++++++-------- qga/commands-posix.c | 6 ++++++ MAINTAINERS | 7 +++++++ tests/qtest/meson.build | 7 +++---- 11 files changed, 127 insertions(+), 27 deletions(-) create mode 100644 docs/devel/ios.rst