CONFIG_FSL_IMX7=y
CONFIG_FSL_IMX6UL=y
CONFIG_SEMIHOSTING=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
CONFIG_ALLWINNER_H3=y
TARGET_BASE_ARCH=arm
TARGET_XML_FILES= gdb-xml/aarch64-core.xml gdb-xml/aarch64-fpu.xml gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
TARGET_WORDS_BIGENDIAN=y
TARGET_XML_FILES= gdb-xml/aarch64-core.xml gdb-xml/aarch64-fpu.xml gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
TARGET_SYSTBL=syscall.tbl
TARGET_XML_FILES= gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
TARGET_WORDS_BIGENDIAN=y
TARGET_XML_FILES= gdb-xml/arm-core.xml gdb-xml/arm-vfp.xml gdb-xml/arm-vfp3.xml gdb-xml/arm-neon.xml gdb-xml/arm-m-profile.xml
TARGET_HAS_BFLT=y
+CONFIG_ARM_COMPATIBLE_SEMIHOSTING=y
config SEMIHOSTING
bool
+
+config ARM_COMPATIBLE_SEMIHOSTING
+ bool
+ select SEMIHOSTING
--- /dev/null
+/*
+ * Arm "Angel" semihosting syscalls
+ *
+ * Copyright (c) 2005, 2007 CodeSourcery.
+ * Copyright (c) 2019 Linaro
+ * Written by Paul Brook.
+ *
+ * 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/>.
+ *
+ * ARM Semihosting is documented in:
+ * Semihosting for AArch32 and AArch64 Release 2.0
+ * https://static.docs.arm.com/100863/0200/semihosting.pdf
+ */
+
+#include "qemu/osdep.h"
+
+#include "cpu.h"
+#include "hw/semihosting/semihost.h"
+#include "hw/semihosting/console.h"
+#include "qemu/log.h"
+#ifdef CONFIG_USER_ONLY
+#include "qemu.h"
+
+#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
+#else
+#include "exec/gdbstub.h"
+#include "qemu/cutils.h"
+#include "hw/arm/boot.h"
+#include "hw/boards.h"
+#endif
+
+#define TARGET_SYS_OPEN 0x01
+#define TARGET_SYS_CLOSE 0x02
+#define TARGET_SYS_WRITEC 0x03
+#define TARGET_SYS_WRITE0 0x04
+#define TARGET_SYS_WRITE 0x05
+#define TARGET_SYS_READ 0x06
+#define TARGET_SYS_READC 0x07
+#define TARGET_SYS_ISTTY 0x09
+#define TARGET_SYS_SEEK 0x0a
+#define TARGET_SYS_FLEN 0x0c
+#define TARGET_SYS_TMPNAM 0x0d
+#define TARGET_SYS_REMOVE 0x0e
+#define TARGET_SYS_RENAME 0x0f
+#define TARGET_SYS_CLOCK 0x10
+#define TARGET_SYS_TIME 0x11
+#define TARGET_SYS_SYSTEM 0x12
+#define TARGET_SYS_ERRNO 0x13
+#define TARGET_SYS_GET_CMDLINE 0x15
+#define TARGET_SYS_HEAPINFO 0x16
+#define TARGET_SYS_EXIT 0x18
+#define TARGET_SYS_SYNCCACHE 0x19
+#define TARGET_SYS_EXIT_EXTENDED 0x20
+
+/* ADP_Stopped_ApplicationExit is used for exit(0),
+ * anything else is implemented as exit(1) */
+#define ADP_Stopped_ApplicationExit (0x20026)
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#define GDB_O_RDONLY 0x000
+#define GDB_O_WRONLY 0x001
+#define GDB_O_RDWR 0x002
+#define GDB_O_APPEND 0x008
+#define GDB_O_CREAT 0x200
+#define GDB_O_TRUNC 0x400
+#define GDB_O_BINARY 0
+
+static int gdb_open_modeflags[12] = {
+ GDB_O_RDONLY,
+ GDB_O_RDONLY | GDB_O_BINARY,
+ GDB_O_RDWR,
+ GDB_O_RDWR | GDB_O_BINARY,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY
+};
+
+static int open_modeflags[12] = {
+ O_RDONLY,
+ O_RDONLY | O_BINARY,
+ O_RDWR,
+ O_RDWR | O_BINARY,
+ O_WRONLY | O_CREAT | O_TRUNC,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
+ O_RDWR | O_CREAT | O_TRUNC,
+ O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
+ O_WRONLY | O_CREAT | O_APPEND,
+ O_WRONLY | O_CREAT | O_APPEND | O_BINARY,
+ O_RDWR | O_CREAT | O_APPEND,
+ O_RDWR | O_CREAT | O_APPEND | O_BINARY
+};
+
+typedef enum GuestFDType {
+ GuestFDUnused = 0,
+ GuestFDHost = 1,
+ GuestFDGDB = 2,
+ GuestFDFeatureFile = 3,
+} GuestFDType;
+
+/*
+ * Guest file descriptors are integer indexes into an array of
+ * these structures (we will dynamically resize as necessary).
+ */
+typedef struct GuestFD {
+ GuestFDType type;
+ union {
+ int hostfd;
+ target_ulong featurefile_offset;
+ };
+} GuestFD;
+
+static GArray *guestfd_array;
+
+/*
+ * Allocate a new guest file descriptor and return it; if we
+ * couldn't allocate a new fd then return -1.
+ * This is a fairly simplistic implementation because we don't
+ * expect that most semihosting guest programs will make very
+ * heavy use of opening and closing fds.
+ */
+static int alloc_guestfd(void)
+{
+ guint i;
+
+ if (!guestfd_array) {
+ /* New entries zero-initialized, i.e. type GuestFDUnused */
+ guestfd_array = g_array_new(FALSE, TRUE, sizeof(GuestFD));
+ }
+
+ /* SYS_OPEN should return nonzero handle on success. Start guestfd from 1 */
+ for (i = 1; i < guestfd_array->len; i++) {
+ GuestFD *gf = &g_array_index(guestfd_array, GuestFD, i);
+
+ if (gf->type == GuestFDUnused) {
+ return i;
+ }
+ }
+
+ /* All elements already in use: expand the array */
+ g_array_set_size(guestfd_array, i + 1);
+ return i;
+}
+
+/*
+ * Look up the guestfd in the data structure; return NULL
+ * for out of bounds, but don't check whether the slot is unused.
+ * This is used internally by the other guestfd functions.
+ */
+static GuestFD *do_get_guestfd(int guestfd)
+{
+ if (!guestfd_array) {
+ return NULL;
+ }
+
+ if (guestfd <= 0 || guestfd >= guestfd_array->len) {
+ return NULL;
+ }
+
+ return &g_array_index(guestfd_array, GuestFD, guestfd);
+}
+
+/*
+ * Associate the specified guest fd (which must have been
+ * allocated via alloc_fd() and not previously used) with
+ * the specified host/gdb fd.
+ */
+static void associate_guestfd(int guestfd, int hostfd)
+{
+ GuestFD *gf = do_get_guestfd(guestfd);
+
+ assert(gf);
+ gf->type = use_gdb_syscalls() ? GuestFDGDB : GuestFDHost;
+ gf->hostfd = hostfd;
+}
+
+/*
+ * Deallocate the specified guest file descriptor. This doesn't
+ * close the host fd, it merely undoes the work of alloc_fd().
+ */
+static void dealloc_guestfd(int guestfd)
+{
+ GuestFD *gf = do_get_guestfd(guestfd);
+
+ assert(gf);
+ gf->type = GuestFDUnused;
+}
+
+/*
+ * Given a guest file descriptor, get the associated struct.
+ * If the fd is not valid, return NULL. This is the function
+ * used by the various semihosting calls to validate a handle
+ * from the guest.
+ * Note: calling alloc_guestfd() or dealloc_guestfd() will
+ * invalidate any GuestFD* obtained by calling this function.
+ */
+static GuestFD *get_guestfd(int guestfd)
+{
+ GuestFD *gf = do_get_guestfd(guestfd);
+
+ if (!gf || gf->type == GuestFDUnused) {
+ return NULL;
+ }
+ return gf;
+}
+
+/*
+ * The semihosting API has no concept of its errno being thread-safe,
+ * as the API design predates SMP CPUs and was intended as a simple
+ * real-hardware set of debug functionality. For QEMU, we make the
+ * errno be per-thread in linux-user mode; in softmmu it is a simple
+ * global, and we assume that the guest takes care of avoiding any races.
+ */
+#ifndef CONFIG_USER_ONLY
+static target_ulong syscall_err;
+
+#include "exec/softmmu-semi.h"
+#endif
+
+static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
+{
+ if (code == (uint32_t)-1) {
+#ifdef CONFIG_USER_ONLY
+ CPUState *cs = env_cpu(env);
+ TaskState *ts = cs->opaque;
+
+ ts->swi_errno = errno;
+#else
+ syscall_err = errno;
+#endif
+ }
+ return code;
+}
+
+static inline uint32_t get_swi_errno(CPUARMState *env)
+{
+#ifdef CONFIG_USER_ONLY
+ CPUState *cs = env_cpu(env);
+ TaskState *ts = cs->opaque;
+
+ return ts->swi_errno;
+#else
+ return syscall_err;
+#endif
+}
+
+static target_ulong arm_semi_syscall_len;
+
+static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
+{
+ ARMCPU *cpu = ARM_CPU(cs);
+ CPUARMState *env = &cpu->env;
+ target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
+
+ if (ret == (target_ulong)-1) {
+ errno = err;
+ set_swi_errno(env, -1);
+ reg0 = ret;
+ } else {
+ /* Fixup syscalls that use nonstardard return conventions. */
+ switch (reg0) {
+ case TARGET_SYS_WRITE:
+ case TARGET_SYS_READ:
+ reg0 = arm_semi_syscall_len - ret;
+ break;
+ case TARGET_SYS_SEEK:
+ reg0 = 0;
+ break;
+ default:
+ reg0 = ret;
+ break;
+ }
+ }
+ if (is_a64(env)) {
+ env->xregs[0] = reg0;
+ } else {
+ env->regs[0] = reg0;
+ }
+}
+
+static target_ulong arm_flen_buf(ARMCPU *cpu)
+{
+ /* Return an address in target memory of 64 bytes where the remote
+ * gdb should write its stat struct. (The format of this structure
+ * is defined by GDB's remote protocol and is not target-specific.)
+ * We put this on the guest's stack just below SP.
+ */
+ CPUARMState *env = &cpu->env;
+ target_ulong sp;
+
+ if (is_a64(env)) {
+ sp = env->xregs[31];
+ } else {
+ sp = env->regs[13];
+ }
+
+ return sp - 64;
+}
+
+static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
+{
+ ARMCPU *cpu = ARM_CPU(cs);
+ CPUARMState *env = &cpu->env;
+ /* The size is always stored in big-endian order, extract
+ the value. We assume the size always fit in 32 bits. */
+ uint32_t size;
+ cpu_memory_rw_debug(cs, arm_flen_buf(cpu) + 32, (uint8_t *)&size, 4, 0);
+ size = be32_to_cpu(size);
+ if (is_a64(env)) {
+ env->xregs[0] = size;
+ } else {
+ env->regs[0] = size;
+ }
+ errno = err;
+ set_swi_errno(env, -1);
+}
+
+static int arm_semi_open_guestfd;
+
+static void arm_semi_open_cb(CPUState *cs, target_ulong ret, target_ulong err)
+{
+ ARMCPU *cpu = ARM_CPU(cs);
+ CPUARMState *env = &cpu->env;
+ if (ret == (target_ulong)-1) {
+ errno = err;
+ set_swi_errno(env, -1);
+ dealloc_guestfd(arm_semi_open_guestfd);
+ } else {
+ associate_guestfd(arm_semi_open_guestfd, ret);
+ ret = arm_semi_open_guestfd;
+ }
+
+ if (is_a64(env)) {
+ env->xregs[0] = ret;
+ } else {
+ env->regs[0] = ret;
+ }
+}
+
+static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
+ const char *fmt, ...)
+{
+ va_list va;
+ CPUARMState *env = &cpu->env;
+
+ va_start(va, fmt);
+ gdb_do_syscallv(cb, fmt, va);
+ va_end(va);
+
+ /*
+ * FIXME: in softmmu mode, the gdbstub will schedule our callback
+ * to occur, but will not actually call it to complete the syscall
+ * until after this function has returned and we are back in the
+ * CPU main loop. Therefore callers to this function must not
+ * do anything with its return value, because it is not necessarily
+ * the result of the syscall, but could just be the old value of X0.
+ * The only thing safe to do with this is that the callers of
+ * do_arm_semihosting() will write it straight back into X0.
+ * (In linux-user mode, the callback will have happened before
+ * gdb_do_syscallv() returns.)
+ *
+ * We should tidy this up so neither this function nor
+ * do_arm_semihosting() return a value, so the mistake of
+ * doing something with the return value is not possible to make.
+ */
+
+ return is_a64(env) ? env->xregs[0] : env->regs[0];
+}
+
+/*
+ * Types for functions implementing various semihosting calls
+ * for specific types of guest file descriptor. These must all
+ * do the work and return the required return value for the guest,
+ * setting the guest errno if appropriate.
+ */
+typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf);
+typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len);
+typedef uint32_t sys_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len);
+typedef uint32_t sys_isattyfn(ARMCPU *cpu, GuestFD *gf);
+typedef uint32_t sys_seekfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong offset);
+typedef uint32_t sys_flenfn(ARMCPU *cpu, GuestFD *gf);
+
+static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
+{
+ CPUARMState *env = &cpu->env;
+
+ /*
+ * Only close the underlying host fd if it's one we opened on behalf
+ * of the guest in SYS_OPEN.
+ */
+ if (gf->hostfd == STDIN_FILENO ||
+ gf->hostfd == STDOUT_FILENO ||
+ gf->hostfd == STDERR_FILENO) {
+ return 0;
+ }
+ return set_swi_errno(env, close(gf->hostfd));
+}
+
+static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ uint32_t ret;
+ CPUARMState *env = &cpu->env;
+ char *s = lock_user(VERIFY_READ, buf, len, 1);
+ if (!s) {
+ /* Return bytes not written on error */
+ return len;
+ }
+ ret = set_swi_errno(env, write(gf->hostfd, s, len));
+ unlock_user(s, buf, 0);
+ if (ret == (uint32_t)-1) {
+ ret = 0;
+ }
+ /* Return bytes not written */
+ return len - ret;
+}
+
+static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ uint32_t ret;
+ CPUARMState *env = &cpu->env;
+ char *s = lock_user(VERIFY_WRITE, buf, len, 0);
+ if (!s) {
+ /* return bytes not read */
+ return len;
+ }
+ do {
+ ret = set_swi_errno(env, read(gf->hostfd, s, len));
+ } while (ret == -1 && errno == EINTR);
+ unlock_user(s, buf, len);
+ if (ret == (uint32_t)-1) {
+ ret = 0;
+ }
+ /* Return bytes not read */
+ return len - ret;
+}
+
+static uint32_t host_isattyfn(ARMCPU *cpu, GuestFD *gf)
+{
+ return isatty(gf->hostfd);
+}
+
+static uint32_t host_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset)
+{
+ CPUARMState *env = &cpu->env;
+ uint32_t ret = set_swi_errno(env, lseek(gf->hostfd, offset, SEEK_SET));
+ if (ret == (uint32_t)-1) {
+ return -1;
+ }
+ return 0;
+}
+
+static uint32_t host_flenfn(ARMCPU *cpu, GuestFD *gf)
+{
+ CPUARMState *env = &cpu->env;
+ struct stat buf;
+ uint32_t ret = set_swi_errno(env, fstat(gf->hostfd, &buf));
+ if (ret == (uint32_t)-1) {
+ return -1;
+ }
+ return buf.st_size;
+}
+
+static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf)
+{
+ return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd);
+}
+
+static uint32_t gdb_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ arm_semi_syscall_len = len;
+ return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
+ gf->hostfd, buf, len);
+}
+
+static uint32_t gdb_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ arm_semi_syscall_len = len;
+ return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
+ gf->hostfd, buf, len);
+}
+
+static uint32_t gdb_isattyfn(ARMCPU *cpu, GuestFD *gf)
+{
+ return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", gf->hostfd);
+}
+
+static uint32_t gdb_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset)
+{
+ return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0",
+ gf->hostfd, offset);
+}
+
+static uint32_t gdb_flenfn(ARMCPU *cpu, GuestFD *gf)
+{
+ return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x",
+ gf->hostfd, arm_flen_buf(cpu));
+}
+
+#define SHFB_MAGIC_0 0x53
+#define SHFB_MAGIC_1 0x48
+#define SHFB_MAGIC_2 0x46
+#define SHFB_MAGIC_3 0x42
+
+/* Feature bits reportable in feature byte 0 */
+#define SH_EXT_EXIT_EXTENDED (1 << 0)
+#define SH_EXT_STDOUT_STDERR (1 << 1)
+
+static const uint8_t featurefile_data[] = {
+ SHFB_MAGIC_0,
+ SHFB_MAGIC_1,
+ SHFB_MAGIC_2,
+ SHFB_MAGIC_3,
+ SH_EXT_EXIT_EXTENDED | SH_EXT_STDOUT_STDERR, /* Feature byte 0 */
+};
+
+static void init_featurefile_guestfd(int guestfd)
+{
+ GuestFD *gf = do_get_guestfd(guestfd);
+
+ assert(gf);
+ gf->type = GuestFDFeatureFile;
+ gf->featurefile_offset = 0;
+}
+
+static uint32_t featurefile_closefn(ARMCPU *cpu, GuestFD *gf)
+{
+ /* Nothing to do */
+ return 0;
+}
+
+static uint32_t featurefile_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ /* This fd can never be open for writing */
+ CPUARMState *env = &cpu->env;
+
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+}
+
+static uint32_t featurefile_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ uint32_t i;
+#ifndef CONFIG_USER_ONLY
+ CPUARMState *env = &cpu->env;
+#endif
+ char *s;
+
+ s = lock_user(VERIFY_WRITE, buf, len, 0);
+ if (!s) {
+ return len;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (gf->featurefile_offset >= sizeof(featurefile_data)) {
+ break;
+ }
+ s[i] = featurefile_data[gf->featurefile_offset];
+ gf->featurefile_offset++;
+ }
+
+ unlock_user(s, buf, len);
+
+ /* Return number of bytes not read */
+ return len - i;
+}
+
+static uint32_t featurefile_isattyfn(ARMCPU *cpu, GuestFD *gf)
+{
+ return 0;
+}
+
+static uint32_t featurefile_seekfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong offset)
+{
+ gf->featurefile_offset = offset;
+ return 0;
+}
+
+static uint32_t featurefile_flenfn(ARMCPU *cpu, GuestFD *gf)
+{
+ return sizeof(featurefile_data);
+}
+
+typedef struct GuestFDFunctions {
+ sys_closefn *closefn;
+ sys_writefn *writefn;
+ sys_readfn *readfn;
+ sys_isattyfn *isattyfn;
+ sys_seekfn *seekfn;
+ sys_flenfn *flenfn;
+} GuestFDFunctions;
+
+static const GuestFDFunctions guestfd_fns[] = {
+ [GuestFDHost] = {
+ .closefn = host_closefn,
+ .writefn = host_writefn,
+ .readfn = host_readfn,
+ .isattyfn = host_isattyfn,
+ .seekfn = host_seekfn,
+ .flenfn = host_flenfn,
+ },
+ [GuestFDGDB] = {
+ .closefn = gdb_closefn,
+ .writefn = gdb_writefn,
+ .readfn = gdb_readfn,
+ .isattyfn = gdb_isattyfn,
+ .seekfn = gdb_seekfn,
+ .flenfn = gdb_flenfn,
+ },
+ [GuestFDFeatureFile] = {
+ .closefn = featurefile_closefn,
+ .writefn = featurefile_writefn,
+ .readfn = featurefile_readfn,
+ .isattyfn = featurefile_isattyfn,
+ .seekfn = featurefile_seekfn,
+ .flenfn = featurefile_flenfn,
+ },
+};
+
+/* Read the input value from the argument block; fail the semihosting
+ * call if the memory read fails.
+ */
+#define GET_ARG(n) do { \
+ if (is_a64(env)) { \
+ if (get_user_u64(arg ## n, args + (n) * 8)) { \
+ errno = EFAULT; \
+ return set_swi_errno(env, -1); \
+ } \
+ } else { \
+ if (get_user_u32(arg ## n, args + (n) * 4)) { \
+ errno = EFAULT; \
+ return set_swi_errno(env, -1); \
+ } \
+ } \
+} while (0)
+
+#define SET_ARG(n, val) \
+ (is_a64(env) ? \
+ put_user_u64(val, args + (n) * 8) : \
+ put_user_u32(val, args + (n) * 4))
+
+/*
+ * Do a semihosting call.
+ *
+ * The specification always says that the "return register" either
+ * returns a specific value or is corrupted, so we don't need to
+ * report to our caller whether we are returning a value or trying to
+ * leave the register unchanged. We use 0xdeadbeef as the return value
+ * when there isn't a defined return value for the call.
+ */
+target_ulong do_arm_semihosting(CPUARMState *env)
+{
+ ARMCPU *cpu = env_archcpu(env);
+ CPUState *cs = env_cpu(env);
+ target_ulong args;
+ target_ulong arg0, arg1, arg2, arg3;
+ char * s;
+ int nr;
+ uint32_t ret;
+ uint32_t len;
+ GuestFD *gf;
+
+ if (is_a64(env)) {
+ /* Note that the syscall number is in W0, not X0 */
+ nr = env->xregs[0] & 0xffffffffU;
+ args = env->xregs[1];
+ } else {
+ nr = env->regs[0];
+ args = env->regs[1];
+ }
+
+ switch (nr) {
+ case TARGET_SYS_OPEN:
+ {
+ int guestfd;
+
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ s = lock_user_string(arg0);
+ if (!s) {
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+ if (arg1 >= 12) {
+ unlock_user(s, arg0, 0);
+ errno = EINVAL;
+ return set_swi_errno(env, -1);
+ }
+
+ guestfd = alloc_guestfd();
+ if (guestfd < 0) {
+ unlock_user(s, arg0, 0);
+ errno = EMFILE;
+ return set_swi_errno(env, -1);
+ }
+
+ if (strcmp(s, ":tt") == 0) {
+ int result_fileno;
+
+ /*
+ * We implement SH_EXT_STDOUT_STDERR, so:
+ * open for read == stdin
+ * open for write == stdout
+ * open for append == stderr
+ */
+ if (arg1 < 4) {
+ result_fileno = STDIN_FILENO;
+ } else if (arg1 < 8) {
+ result_fileno = STDOUT_FILENO;
+ } else {
+ result_fileno = STDERR_FILENO;
+ }
+ associate_guestfd(guestfd, result_fileno);
+ unlock_user(s, arg0, 0);
+ return guestfd;
+ }
+ if (strcmp(s, ":semihosting-features") == 0) {
+ unlock_user(s, arg0, 0);
+ /* We must fail opens for modes other than 0 ('r') or 1 ('rb') */
+ if (arg1 != 0 && arg1 != 1) {
+ dealloc_guestfd(guestfd);
+ errno = EACCES;
+ return set_swi_errno(env, -1);
+ }
+ init_featurefile_guestfd(guestfd);
+ return guestfd;
+ }
+
+ if (use_gdb_syscalls()) {
+ arm_semi_open_guestfd = guestfd;
+ ret = arm_gdb_syscall(cpu, arm_semi_open_cb, "open,%s,%x,1a4", arg0,
+ (int)arg2 + 1, gdb_open_modeflags[arg1]);
+ } else {
+ ret = set_swi_errno(env, open(s, open_modeflags[arg1], 0644));
+ if (ret == (uint32_t)-1) {
+ dealloc_guestfd(guestfd);
+ } else {
+ associate_guestfd(guestfd, ret);
+ ret = guestfd;
+ }
+ }
+ unlock_user(s, arg0, 0);
+ return ret;
+ }
+ case TARGET_SYS_CLOSE:
+ GET_ARG(0);
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ ret = guestfd_fns[gf->type].closefn(cpu, gf);
+ dealloc_guestfd(arg0);
+ return ret;
+ case TARGET_SYS_WRITEC:
+ qemu_semihosting_console_outc(env, args);
+ return 0xdeadbeef;
+ case TARGET_SYS_WRITE0:
+ return qemu_semihosting_console_outs(env, args);
+ case TARGET_SYS_WRITE:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ len = arg2;
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ return guestfd_fns[gf->type].writefn(cpu, gf, arg1, len);
+ case TARGET_SYS_READ:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ len = arg2;
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ return guestfd_fns[gf->type].readfn(cpu, gf, arg1, len);
+ case TARGET_SYS_READC:
+ return qemu_semihosting_console_inc(env);
+ case TARGET_SYS_ISTTY:
+ GET_ARG(0);
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ return guestfd_fns[gf->type].isattyfn(cpu, gf);
+ case TARGET_SYS_SEEK:
+ GET_ARG(0);
+ GET_ARG(1);
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ return guestfd_fns[gf->type].seekfn(cpu, gf, arg1);
+ case TARGET_SYS_FLEN:
+ GET_ARG(0);
+
+ gf = get_guestfd(arg0);
+ if (!gf) {
+ errno = EBADF;
+ return set_swi_errno(env, -1);
+ }
+
+ return guestfd_fns[gf->type].flenfn(cpu, gf);
+ case TARGET_SYS_TMPNAM:
+ qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__);
+ return -1;
+ case TARGET_SYS_REMOVE:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s",
+ arg0, (int)arg1 + 1);
+ } else {
+ s = lock_user_string(arg0);
+ if (!s) {
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+ ret = set_swi_errno(env, remove(s));
+ unlock_user(s, arg0, 0);
+ }
+ return ret;
+ case TARGET_SYS_RENAME:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ GET_ARG(3);
+ if (use_gdb_syscalls()) {
+ return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s",
+ arg0, (int)arg1 + 1, arg2, (int)arg3 + 1);
+ } else {
+ char *s2;
+ s = lock_user_string(arg0);
+ s2 = lock_user_string(arg2);
+ if (!s || !s2) {
+ errno = EFAULT;
+ ret = set_swi_errno(env, -1);
+ } else {
+ ret = set_swi_errno(env, rename(s, s2));
+ }
+ if (s2)
+ unlock_user(s2, arg2, 0);
+ if (s)
+ unlock_user(s, arg0, 0);
+ return ret;
+ }
+ case TARGET_SYS_CLOCK:
+ return clock() / (CLOCKS_PER_SEC / 100);
+ case TARGET_SYS_TIME:
+ return set_swi_errno(env, time(NULL));
+ case TARGET_SYS_SYSTEM:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s",
+ arg0, (int)arg1 + 1);
+ } else {
+ s = lock_user_string(arg0);
+ if (!s) {
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+ ret = set_swi_errno(env, system(s));
+ unlock_user(s, arg0, 0);
+ return ret;
+ }
+ case TARGET_SYS_ERRNO:
+ return get_swi_errno(env);
+ case TARGET_SYS_GET_CMDLINE:
+ {
+ /* Build a command-line from the original argv.
+ *
+ * The inputs are:
+ * * arg0, pointer to a buffer of at least the size
+ * specified in arg1.
+ * * arg1, size of the buffer pointed to by arg0 in
+ * bytes.
+ *
+ * The outputs are:
+ * * arg0, pointer to null-terminated string of the
+ * command line.
+ * * arg1, length of the string pointed to by arg0.
+ */
+
+ char *output_buffer;
+ size_t input_size;
+ size_t output_size;
+ int status = 0;
+#if !defined(CONFIG_USER_ONLY)
+ const char *cmdline;
+#else
+ TaskState *ts = cs->opaque;
+#endif
+ GET_ARG(0);
+ GET_ARG(1);
+ input_size = arg1;
+ /* Compute the size of the output string. */
+#if !defined(CONFIG_USER_ONLY)
+ cmdline = semihosting_get_cmdline();
+ if (cmdline == NULL) {
+ cmdline = ""; /* Default to an empty line. */
+ }
+ output_size = strlen(cmdline) + 1; /* Count terminating 0. */
+#else
+ unsigned int i;
+
+ output_size = ts->info->arg_end - ts->info->arg_start;
+ if (!output_size) {
+ /*
+ * We special-case the "empty command line" case (argc==0).
+ * Just provide the terminating 0.
+ */
+ output_size = 1;
+ }
+#endif
+
+ if (output_size > input_size) {
+ /* Not enough space to store command-line arguments. */
+ errno = E2BIG;
+ return set_swi_errno(env, -1);
+ }
+
+ /* Adjust the command-line length. */
+ if (SET_ARG(1, output_size - 1)) {
+ /* Couldn't write back to argument block */
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+
+ /* Lock the buffer on the ARM side. */
+ output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
+ if (!output_buffer) {
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+
+ /* Copy the command-line arguments. */
+#if !defined(CONFIG_USER_ONLY)
+ pstrcpy(output_buffer, output_size, cmdline);
+#else
+ if (output_size == 1) {
+ /* Empty command-line. */
+ output_buffer[0] = '\0';
+ goto out;
+ }
+
+ if (copy_from_user(output_buffer, ts->info->arg_start,
+ output_size)) {
+ errno = EFAULT;
+ status = set_swi_errno(env, -1);
+ goto out;
+ }
+
+ /* Separate arguments by white spaces. */
+ for (i = 0; i < output_size - 1; i++) {
+ if (output_buffer[i] == 0) {
+ output_buffer[i] = ' ';
+ }
+ }
+ out:
+#endif
+ /* Unlock the buffer on the ARM side. */
+ unlock_user(output_buffer, arg0, output_size);
+
+ return status;
+ }
+ case TARGET_SYS_HEAPINFO:
+ {
+ target_ulong retvals[4];
+ target_ulong limit;
+ int i;
+#ifdef CONFIG_USER_ONLY
+ TaskState *ts = cs->opaque;
+#else
+ const struct arm_boot_info *info = env->boot_info;
+ target_ulong rambase = info->loader_start;
+#endif
+
+ GET_ARG(0);
+
+#ifdef CONFIG_USER_ONLY
+ /*
+ * Some C libraries assume the heap immediately follows .bss, so
+ * allocate it using sbrk.
+ */
+ if (!ts->heap_limit) {
+ abi_ulong ret;
+
+ ts->heap_base = do_brk(0);
+ limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
+ /* Try a big heap, and reduce the size if that fails. */
+ for (;;) {
+ ret = do_brk(limit);
+ if (ret >= limit) {
+ break;
+ }
+ limit = (ts->heap_base >> 1) + (limit >> 1);
+ }
+ ts->heap_limit = limit;
+ }
+
+ retvals[0] = ts->heap_base;
+ retvals[1] = ts->heap_limit;
+ retvals[2] = ts->stack_base;
+ retvals[3] = 0; /* Stack limit. */
+#else
+ limit = current_machine->ram_size;
+ /* TODO: Make this use the limit of the loaded application. */
+ retvals[0] = rambase + limit / 2;
+ retvals[1] = rambase + limit;
+ retvals[2] = rambase + limit; /* Stack base */
+ retvals[3] = rambase; /* Stack limit. */
+#endif
+
+ for (i = 0; i < ARRAY_SIZE(retvals); i++) {
+ bool fail;
+
+ if (is_a64(env)) {
+ fail = put_user_u64(retvals[i], arg0 + i * 8);
+ } else {
+ fail = put_user_u32(retvals[i], arg0 + i * 4);
+ }
+
+ if (fail) {
+ /* Couldn't write back to argument block */
+ errno = EFAULT;
+ return set_swi_errno(env, -1);
+ }
+ }
+ return 0;
+ }
+ case TARGET_SYS_EXIT:
+ case TARGET_SYS_EXIT_EXTENDED:
+ if (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(env)) {
+ /*
+ * The A64 version of SYS_EXIT takes a parameter block,
+ * so the application-exit type can return a subcode which
+ * is the exit status code from the application.
+ * SYS_EXIT_EXTENDED is an a new-in-v2.0 optional function
+ * which allows A32/T32 guests to also provide a status code.
+ */
+ GET_ARG(0);
+ GET_ARG(1);
+
+ if (arg0 == ADP_Stopped_ApplicationExit) {
+ ret = arg1;
+ } else {
+ ret = 1;
+ }
+ } else {
+ /*
+ * The A32/T32 version of SYS_EXIT specifies only
+ * Stopped_ApplicationExit as normal exit, but does not
+ * allow the guest to specify the exit status code.
+ * Everything else is considered an error.
+ */
+ ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
+ }
+ gdb_exit(ret);
+ exit(ret);
+ case TARGET_SYS_SYNCCACHE:
+ /*
+ * Clean the D-cache and invalidate the I-cache for the specified
+ * virtual address range. This is a nop for us since we don't
+ * implement caches. This is only present on A64.
+ */
+ if (is_a64(env)) {
+ return 0;
+ }
+ /* fall through -- invalid for A32/T32 */
+ default:
+ fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
+ cpu_dump_state(cs, stderr, 0);
+ abort();
+ }
+}
'config.c',
'console.c',
))
+
+specific_ss.add(when: ['CONFIG_ARM_COMPATIBLE_SEMIHOSTING'],
+ if_true: files('arm-compat-semi.c'))
-linux_user_ss.add(when: 'TARGET_AARCH64', if_true: files('semihost.c'))
-linux_user_ss.add(when: 'TARGET_ARM', if_true: files('semihost.c'))
-
subdir('nwfpe')
syscall_nr_generators += {
+++ /dev/null
-/*
- * ARM Semihosting Console Support
- *
- * Copyright (c) 2019 Linaro Ltd
- *
- * Currently ARM is unique in having support for semihosting support
- * in linux-user. So for now we implement the common console API but
- * just for arm linux-user.
- *
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-#include "qemu/osdep.h"
-#include "cpu.h"
-#include "hw/semihosting/console.h"
-#include "qemu.h"
-#include <termios.h>
-
-int qemu_semihosting_console_outs(CPUArchState *env, target_ulong addr)
-{
- int len = target_strlen(addr);
- void *s;
- if (len < 0){
- qemu_log_mask(LOG_GUEST_ERROR,
- "%s: passed inaccessible address " TARGET_FMT_lx,
- __func__, addr);
- return 0;
- }
- s = lock_user(VERIFY_READ, addr, (long)(len + 1), 1);
- g_assert(s); /* target_strlen has already verified this will work */
- len = write(STDERR_FILENO, s, len);
- unlock_user(s, addr, 0);
- return len;
-}
-
-void qemu_semihosting_console_outc(CPUArchState *env, target_ulong addr)
-{
- char c;
-
- if (get_user_u8(c, addr)) {
- qemu_log_mask(LOG_GUEST_ERROR,
- "%s: passed inaccessible address " TARGET_FMT_lx,
- __func__, addr);
- } else {
- if (write(STDERR_FILENO, &c, 1) != 1) {
- qemu_log_mask(LOG_UNIMP, "%s: unexpected write to stdout failure",
- __func__);
- }
- }
-}
-
-/*
- * For linux-user we can safely block. However as we want to return as
- * soon as a character is read we need to tweak the termio to disable
- * line buffering. We restore the old mode afterwards in case the
- * program is expecting more normal behaviour. This is slow but
- * nothing using semihosting console reading is expecting to be fast.
- */
-target_ulong qemu_semihosting_console_inc(CPUArchState *env)
-{
- uint8_t c;
- struct termios old_tio, new_tio;
-
- /* Disable line-buffering and echo */
- tcgetattr(STDIN_FILENO, &old_tio);
- new_tio = old_tio;
- new_tio.c_lflag &= (~ICANON & ~ECHO);
- tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);
-
- c = getchar();
-
- /* restore config */
- tcsetattr(STDIN_FILENO, TCSANOW, &old_tio);
-
- return (target_ulong) c;
-}
linux_user_ss.add(when: 'TARGET_HAS_BFLT', if_true: files('flatload.c'))
linux_user_ss.add(when: 'TARGET_I386', if_true: files('vm86.c'))
+linux_user_ss.add(when: 'CONFIG_ARM_COMPATIBLE_SEMIHOSTING', if_true: files('semihost.c'))
syscall_nr_generators = {}
--- /dev/null
+/*
+ * ARM Semihosting Console Support
+ *
+ * Copyright (c) 2019 Linaro Ltd
+ *
+ * Currently ARM is unique in having support for semihosting support
+ * in linux-user. So for now we implement the common console API but
+ * just for arm linux-user.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "hw/semihosting/console.h"
+#include "qemu.h"
+#include <termios.h>
+
+int qemu_semihosting_console_outs(CPUArchState *env, target_ulong addr)
+{
+ int len = target_strlen(addr);
+ void *s;
+ if (len < 0){
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: passed inaccessible address " TARGET_FMT_lx,
+ __func__, addr);
+ return 0;
+ }
+ s = lock_user(VERIFY_READ, addr, (long)(len + 1), 1);
+ g_assert(s); /* target_strlen has already verified this will work */
+ len = write(STDERR_FILENO, s, len);
+ unlock_user(s, addr, 0);
+ return len;
+}
+
+void qemu_semihosting_console_outc(CPUArchState *env, target_ulong addr)
+{
+ char c;
+
+ if (get_user_u8(c, addr)) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: passed inaccessible address " TARGET_FMT_lx,
+ __func__, addr);
+ } else {
+ if (write(STDERR_FILENO, &c, 1) != 1) {
+ qemu_log_mask(LOG_UNIMP, "%s: unexpected write to stdout failure",
+ __func__);
+ }
+ }
+}
+
+/*
+ * For linux-user we can safely block. However as we want to return as
+ * soon as a character is read we need to tweak the termio to disable
+ * line buffering. We restore the old mode afterwards in case the
+ * program is expecting more normal behaviour. This is slow but
+ * nothing using semihosting console reading is expecting to be fast.
+ */
+target_ulong qemu_semihosting_console_inc(CPUArchState *env)
+{
+ uint8_t c;
+ struct termios old_tio, new_tio;
+
+ /* Disable line-buffering and echo */
+ tcgetattr(STDIN_FILENO, &old_tio);
+ new_tio = old_tio;
+ new_tio.c_lflag &= (~ICANON & ~ECHO);
+ tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);
+
+ c = getchar();
+
+ /* restore config */
+ tcsetattr(STDIN_FILENO, TCSANOW, &old_tio);
+
+ return (target_ulong) c;
+}
+++ /dev/null
-/*
- * Arm "Angel" semihosting syscalls
- *
- * Copyright (c) 2005, 2007 CodeSourcery.
- * Copyright (c) 2019 Linaro
- * Written by Paul Brook.
- *
- * 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/>.
- *
- * ARM Semihosting is documented in:
- * Semihosting for AArch32 and AArch64 Release 2.0
- * https://static.docs.arm.com/100863/0200/semihosting.pdf
- */
-
-#include "qemu/osdep.h"
-
-#include "cpu.h"
-#include "hw/semihosting/semihost.h"
-#include "hw/semihosting/console.h"
-#include "qemu/log.h"
-#ifdef CONFIG_USER_ONLY
-#include "qemu.h"
-
-#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
-#else
-#include "exec/gdbstub.h"
-#include "qemu/cutils.h"
-#include "hw/arm/boot.h"
-#include "hw/boards.h"
-#endif
-
-#define TARGET_SYS_OPEN 0x01
-#define TARGET_SYS_CLOSE 0x02
-#define TARGET_SYS_WRITEC 0x03
-#define TARGET_SYS_WRITE0 0x04
-#define TARGET_SYS_WRITE 0x05
-#define TARGET_SYS_READ 0x06
-#define TARGET_SYS_READC 0x07
-#define TARGET_SYS_ISTTY 0x09
-#define TARGET_SYS_SEEK 0x0a
-#define TARGET_SYS_FLEN 0x0c
-#define TARGET_SYS_TMPNAM 0x0d
-#define TARGET_SYS_REMOVE 0x0e
-#define TARGET_SYS_RENAME 0x0f
-#define TARGET_SYS_CLOCK 0x10
-#define TARGET_SYS_TIME 0x11
-#define TARGET_SYS_SYSTEM 0x12
-#define TARGET_SYS_ERRNO 0x13
-#define TARGET_SYS_GET_CMDLINE 0x15
-#define TARGET_SYS_HEAPINFO 0x16
-#define TARGET_SYS_EXIT 0x18
-#define TARGET_SYS_SYNCCACHE 0x19
-#define TARGET_SYS_EXIT_EXTENDED 0x20
-
-/* ADP_Stopped_ApplicationExit is used for exit(0),
- * anything else is implemented as exit(1) */
-#define ADP_Stopped_ApplicationExit (0x20026)
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-#define GDB_O_RDONLY 0x000
-#define GDB_O_WRONLY 0x001
-#define GDB_O_RDWR 0x002
-#define GDB_O_APPEND 0x008
-#define GDB_O_CREAT 0x200
-#define GDB_O_TRUNC 0x400
-#define GDB_O_BINARY 0
-
-static int gdb_open_modeflags[12] = {
- GDB_O_RDONLY,
- GDB_O_RDONLY | GDB_O_BINARY,
- GDB_O_RDWR,
- GDB_O_RDWR | GDB_O_BINARY,
- GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
- GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
- GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
- GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
- GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
- GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY,
- GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
- GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY
-};
-
-static int open_modeflags[12] = {
- O_RDONLY,
- O_RDONLY | O_BINARY,
- O_RDWR,
- O_RDWR | O_BINARY,
- O_WRONLY | O_CREAT | O_TRUNC,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
- O_RDWR | O_CREAT | O_TRUNC,
- O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
- O_WRONLY | O_CREAT | O_APPEND,
- O_WRONLY | O_CREAT | O_APPEND | O_BINARY,
- O_RDWR | O_CREAT | O_APPEND,
- O_RDWR | O_CREAT | O_APPEND | O_BINARY
-};
-
-typedef enum GuestFDType {
- GuestFDUnused = 0,
- GuestFDHost = 1,
- GuestFDGDB = 2,
- GuestFDFeatureFile = 3,
-} GuestFDType;
-
-/*
- * Guest file descriptors are integer indexes into an array of
- * these structures (we will dynamically resize as necessary).
- */
-typedef struct GuestFD {
- GuestFDType type;
- union {
- int hostfd;
- target_ulong featurefile_offset;
- };
-} GuestFD;
-
-static GArray *guestfd_array;
-
-/*
- * Allocate a new guest file descriptor and return it; if we
- * couldn't allocate a new fd then return -1.
- * This is a fairly simplistic implementation because we don't
- * expect that most semihosting guest programs will make very
- * heavy use of opening and closing fds.
- */
-static int alloc_guestfd(void)
-{
- guint i;
-
- if (!guestfd_array) {
- /* New entries zero-initialized, i.e. type GuestFDUnused */
- guestfd_array = g_array_new(FALSE, TRUE, sizeof(GuestFD));
- }
-
- /* SYS_OPEN should return nonzero handle on success. Start guestfd from 1 */
- for (i = 1; i < guestfd_array->len; i++) {
- GuestFD *gf = &g_array_index(guestfd_array, GuestFD, i);
-
- if (gf->type == GuestFDUnused) {
- return i;
- }
- }
-
- /* All elements already in use: expand the array */
- g_array_set_size(guestfd_array, i + 1);
- return i;
-}
-
-/*
- * Look up the guestfd in the data structure; return NULL
- * for out of bounds, but don't check whether the slot is unused.
- * This is used internally by the other guestfd functions.
- */
-static GuestFD *do_get_guestfd(int guestfd)
-{
- if (!guestfd_array) {
- return NULL;
- }
-
- if (guestfd <= 0 || guestfd >= guestfd_array->len) {
- return NULL;
- }
-
- return &g_array_index(guestfd_array, GuestFD, guestfd);
-}
-
-/*
- * Associate the specified guest fd (which must have been
- * allocated via alloc_fd() and not previously used) with
- * the specified host/gdb fd.
- */
-static void associate_guestfd(int guestfd, int hostfd)
-{
- GuestFD *gf = do_get_guestfd(guestfd);
-
- assert(gf);
- gf->type = use_gdb_syscalls() ? GuestFDGDB : GuestFDHost;
- gf->hostfd = hostfd;
-}
-
-/*
- * Deallocate the specified guest file descriptor. This doesn't
- * close the host fd, it merely undoes the work of alloc_fd().
- */
-static void dealloc_guestfd(int guestfd)
-{
- GuestFD *gf = do_get_guestfd(guestfd);
-
- assert(gf);
- gf->type = GuestFDUnused;
-}
-
-/*
- * Given a guest file descriptor, get the associated struct.
- * If the fd is not valid, return NULL. This is the function
- * used by the various semihosting calls to validate a handle
- * from the guest.
- * Note: calling alloc_guestfd() or dealloc_guestfd() will
- * invalidate any GuestFD* obtained by calling this function.
- */
-static GuestFD *get_guestfd(int guestfd)
-{
- GuestFD *gf = do_get_guestfd(guestfd);
-
- if (!gf || gf->type == GuestFDUnused) {
- return NULL;
- }
- return gf;
-}
-
-/*
- * The semihosting API has no concept of its errno being thread-safe,
- * as the API design predates SMP CPUs and was intended as a simple
- * real-hardware set of debug functionality. For QEMU, we make the
- * errno be per-thread in linux-user mode; in softmmu it is a simple
- * global, and we assume that the guest takes care of avoiding any races.
- */
-#ifndef CONFIG_USER_ONLY
-static target_ulong syscall_err;
-
-#include "exec/softmmu-semi.h"
-#endif
-
-static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
-{
- if (code == (uint32_t)-1) {
-#ifdef CONFIG_USER_ONLY
- CPUState *cs = env_cpu(env);
- TaskState *ts = cs->opaque;
-
- ts->swi_errno = errno;
-#else
- syscall_err = errno;
-#endif
- }
- return code;
-}
-
-static inline uint32_t get_swi_errno(CPUARMState *env)
-{
-#ifdef CONFIG_USER_ONLY
- CPUState *cs = env_cpu(env);
- TaskState *ts = cs->opaque;
-
- return ts->swi_errno;
-#else
- return syscall_err;
-#endif
-}
-
-static target_ulong arm_semi_syscall_len;
-
-static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
-{
- ARMCPU *cpu = ARM_CPU(cs);
- CPUARMState *env = &cpu->env;
- target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
-
- if (ret == (target_ulong)-1) {
- errno = err;
- set_swi_errno(env, -1);
- reg0 = ret;
- } else {
- /* Fixup syscalls that use nonstardard return conventions. */
- switch (reg0) {
- case TARGET_SYS_WRITE:
- case TARGET_SYS_READ:
- reg0 = arm_semi_syscall_len - ret;
- break;
- case TARGET_SYS_SEEK:
- reg0 = 0;
- break;
- default:
- reg0 = ret;
- break;
- }
- }
- if (is_a64(env)) {
- env->xregs[0] = reg0;
- } else {
- env->regs[0] = reg0;
- }
-}
-
-static target_ulong arm_flen_buf(ARMCPU *cpu)
-{
- /* Return an address in target memory of 64 bytes where the remote
- * gdb should write its stat struct. (The format of this structure
- * is defined by GDB's remote protocol and is not target-specific.)
- * We put this on the guest's stack just below SP.
- */
- CPUARMState *env = &cpu->env;
- target_ulong sp;
-
- if (is_a64(env)) {
- sp = env->xregs[31];
- } else {
- sp = env->regs[13];
- }
-
- return sp - 64;
-}
-
-static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
-{
- ARMCPU *cpu = ARM_CPU(cs);
- CPUARMState *env = &cpu->env;
- /* The size is always stored in big-endian order, extract
- the value. We assume the size always fit in 32 bits. */
- uint32_t size;
- cpu_memory_rw_debug(cs, arm_flen_buf(cpu) + 32, (uint8_t *)&size, 4, 0);
- size = be32_to_cpu(size);
- if (is_a64(env)) {
- env->xregs[0] = size;
- } else {
- env->regs[0] = size;
- }
- errno = err;
- set_swi_errno(env, -1);
-}
-
-static int arm_semi_open_guestfd;
-
-static void arm_semi_open_cb(CPUState *cs, target_ulong ret, target_ulong err)
-{
- ARMCPU *cpu = ARM_CPU(cs);
- CPUARMState *env = &cpu->env;
- if (ret == (target_ulong)-1) {
- errno = err;
- set_swi_errno(env, -1);
- dealloc_guestfd(arm_semi_open_guestfd);
- } else {
- associate_guestfd(arm_semi_open_guestfd, ret);
- ret = arm_semi_open_guestfd;
- }
-
- if (is_a64(env)) {
- env->xregs[0] = ret;
- } else {
- env->regs[0] = ret;
- }
-}
-
-static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
- const char *fmt, ...)
-{
- va_list va;
- CPUARMState *env = &cpu->env;
-
- va_start(va, fmt);
- gdb_do_syscallv(cb, fmt, va);
- va_end(va);
-
- /*
- * FIXME: in softmmu mode, the gdbstub will schedule our callback
- * to occur, but will not actually call it to complete the syscall
- * until after this function has returned and we are back in the
- * CPU main loop. Therefore callers to this function must not
- * do anything with its return value, because it is not necessarily
- * the result of the syscall, but could just be the old value of X0.
- * The only thing safe to do with this is that the callers of
- * do_arm_semihosting() will write it straight back into X0.
- * (In linux-user mode, the callback will have happened before
- * gdb_do_syscallv() returns.)
- *
- * We should tidy this up so neither this function nor
- * do_arm_semihosting() return a value, so the mistake of
- * doing something with the return value is not possible to make.
- */
-
- return is_a64(env) ? env->xregs[0] : env->regs[0];
-}
-
-/*
- * Types for functions implementing various semihosting calls
- * for specific types of guest file descriptor. These must all
- * do the work and return the required return value for the guest,
- * setting the guest errno if appropriate.
- */
-typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf);
-typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len);
-typedef uint32_t sys_readfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len);
-typedef uint32_t sys_isattyfn(ARMCPU *cpu, GuestFD *gf);
-typedef uint32_t sys_seekfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong offset);
-typedef uint32_t sys_flenfn(ARMCPU *cpu, GuestFD *gf);
-
-static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
-{
- CPUARMState *env = &cpu->env;
-
- /*
- * Only close the underlying host fd if it's one we opened on behalf
- * of the guest in SYS_OPEN.
- */
- if (gf->hostfd == STDIN_FILENO ||
- gf->hostfd == STDOUT_FILENO ||
- gf->hostfd == STDERR_FILENO) {
- return 0;
- }
- return set_swi_errno(env, close(gf->hostfd));
-}
-
-static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- uint32_t ret;
- CPUARMState *env = &cpu->env;
- char *s = lock_user(VERIFY_READ, buf, len, 1);
- if (!s) {
- /* Return bytes not written on error */
- return len;
- }
- ret = set_swi_errno(env, write(gf->hostfd, s, len));
- unlock_user(s, buf, 0);
- if (ret == (uint32_t)-1) {
- ret = 0;
- }
- /* Return bytes not written */
- return len - ret;
-}
-
-static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- uint32_t ret;
- CPUARMState *env = &cpu->env;
- char *s = lock_user(VERIFY_WRITE, buf, len, 0);
- if (!s) {
- /* return bytes not read */
- return len;
- }
- do {
- ret = set_swi_errno(env, read(gf->hostfd, s, len));
- } while (ret == -1 && errno == EINTR);
- unlock_user(s, buf, len);
- if (ret == (uint32_t)-1) {
- ret = 0;
- }
- /* Return bytes not read */
- return len - ret;
-}
-
-static uint32_t host_isattyfn(ARMCPU *cpu, GuestFD *gf)
-{
- return isatty(gf->hostfd);
-}
-
-static uint32_t host_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset)
-{
- CPUARMState *env = &cpu->env;
- uint32_t ret = set_swi_errno(env, lseek(gf->hostfd, offset, SEEK_SET));
- if (ret == (uint32_t)-1) {
- return -1;
- }
- return 0;
-}
-
-static uint32_t host_flenfn(ARMCPU *cpu, GuestFD *gf)
-{
- CPUARMState *env = &cpu->env;
- struct stat buf;
- uint32_t ret = set_swi_errno(env, fstat(gf->hostfd, &buf));
- if (ret == (uint32_t)-1) {
- return -1;
- }
- return buf.st_size;
-}
-
-static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf)
-{
- return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd);
-}
-
-static uint32_t gdb_writefn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
- gf->hostfd, buf, len);
-}
-
-static uint32_t gdb_readfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
- gf->hostfd, buf, len);
-}
-
-static uint32_t gdb_isattyfn(ARMCPU *cpu, GuestFD *gf)
-{
- return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", gf->hostfd);
-}
-
-static uint32_t gdb_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset)
-{
- return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0",
- gf->hostfd, offset);
-}
-
-static uint32_t gdb_flenfn(ARMCPU *cpu, GuestFD *gf)
-{
- return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x",
- gf->hostfd, arm_flen_buf(cpu));
-}
-
-#define SHFB_MAGIC_0 0x53
-#define SHFB_MAGIC_1 0x48
-#define SHFB_MAGIC_2 0x46
-#define SHFB_MAGIC_3 0x42
-
-/* Feature bits reportable in feature byte 0 */
-#define SH_EXT_EXIT_EXTENDED (1 << 0)
-#define SH_EXT_STDOUT_STDERR (1 << 1)
-
-static const uint8_t featurefile_data[] = {
- SHFB_MAGIC_0,
- SHFB_MAGIC_1,
- SHFB_MAGIC_2,
- SHFB_MAGIC_3,
- SH_EXT_EXIT_EXTENDED | SH_EXT_STDOUT_STDERR, /* Feature byte 0 */
-};
-
-static void init_featurefile_guestfd(int guestfd)
-{
- GuestFD *gf = do_get_guestfd(guestfd);
-
- assert(gf);
- gf->type = GuestFDFeatureFile;
- gf->featurefile_offset = 0;
-}
-
-static uint32_t featurefile_closefn(ARMCPU *cpu, GuestFD *gf)
-{
- /* Nothing to do */
- return 0;
-}
-
-static uint32_t featurefile_writefn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- /* This fd can never be open for writing */
- CPUARMState *env = &cpu->env;
-
- errno = EBADF;
- return set_swi_errno(env, -1);
-}
-
-static uint32_t featurefile_readfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong buf, uint32_t len)
-{
- uint32_t i;
-#ifndef CONFIG_USER_ONLY
- CPUARMState *env = &cpu->env;
-#endif
- char *s;
-
- s = lock_user(VERIFY_WRITE, buf, len, 0);
- if (!s) {
- return len;
- }
-
- for (i = 0; i < len; i++) {
- if (gf->featurefile_offset >= sizeof(featurefile_data)) {
- break;
- }
- s[i] = featurefile_data[gf->featurefile_offset];
- gf->featurefile_offset++;
- }
-
- unlock_user(s, buf, len);
-
- /* Return number of bytes not read */
- return len - i;
-}
-
-static uint32_t featurefile_isattyfn(ARMCPU *cpu, GuestFD *gf)
-{
- return 0;
-}
-
-static uint32_t featurefile_seekfn(ARMCPU *cpu, GuestFD *gf,
- target_ulong offset)
-{
- gf->featurefile_offset = offset;
- return 0;
-}
-
-static uint32_t featurefile_flenfn(ARMCPU *cpu, GuestFD *gf)
-{
- return sizeof(featurefile_data);
-}
-
-typedef struct GuestFDFunctions {
- sys_closefn *closefn;
- sys_writefn *writefn;
- sys_readfn *readfn;
- sys_isattyfn *isattyfn;
- sys_seekfn *seekfn;
- sys_flenfn *flenfn;
-} GuestFDFunctions;
-
-static const GuestFDFunctions guestfd_fns[] = {
- [GuestFDHost] = {
- .closefn = host_closefn,
- .writefn = host_writefn,
- .readfn = host_readfn,
- .isattyfn = host_isattyfn,
- .seekfn = host_seekfn,
- .flenfn = host_flenfn,
- },
- [GuestFDGDB] = {
- .closefn = gdb_closefn,
- .writefn = gdb_writefn,
- .readfn = gdb_readfn,
- .isattyfn = gdb_isattyfn,
- .seekfn = gdb_seekfn,
- .flenfn = gdb_flenfn,
- },
- [GuestFDFeatureFile] = {
- .closefn = featurefile_closefn,
- .writefn = featurefile_writefn,
- .readfn = featurefile_readfn,
- .isattyfn = featurefile_isattyfn,
- .seekfn = featurefile_seekfn,
- .flenfn = featurefile_flenfn,
- },
-};
-
-/* Read the input value from the argument block; fail the semihosting
- * call if the memory read fails.
- */
-#define GET_ARG(n) do { \
- if (is_a64(env)) { \
- if (get_user_u64(arg ## n, args + (n) * 8)) { \
- errno = EFAULT; \
- return set_swi_errno(env, -1); \
- } \
- } else { \
- if (get_user_u32(arg ## n, args + (n) * 4)) { \
- errno = EFAULT; \
- return set_swi_errno(env, -1); \
- } \
- } \
-} while (0)
-
-#define SET_ARG(n, val) \
- (is_a64(env) ? \
- put_user_u64(val, args + (n) * 8) : \
- put_user_u32(val, args + (n) * 4))
-
-/*
- * Do a semihosting call.
- *
- * The specification always says that the "return register" either
- * returns a specific value or is corrupted, so we don't need to
- * report to our caller whether we are returning a value or trying to
- * leave the register unchanged. We use 0xdeadbeef as the return value
- * when there isn't a defined return value for the call.
- */
-target_ulong do_arm_semihosting(CPUARMState *env)
-{
- ARMCPU *cpu = env_archcpu(env);
- CPUState *cs = env_cpu(env);
- target_ulong args;
- target_ulong arg0, arg1, arg2, arg3;
- char * s;
- int nr;
- uint32_t ret;
- uint32_t len;
- GuestFD *gf;
-
- if (is_a64(env)) {
- /* Note that the syscall number is in W0, not X0 */
- nr = env->xregs[0] & 0xffffffffU;
- args = env->xregs[1];
- } else {
- nr = env->regs[0];
- args = env->regs[1];
- }
-
- switch (nr) {
- case TARGET_SYS_OPEN:
- {
- int guestfd;
-
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- s = lock_user_string(arg0);
- if (!s) {
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
- if (arg1 >= 12) {
- unlock_user(s, arg0, 0);
- errno = EINVAL;
- return set_swi_errno(env, -1);
- }
-
- guestfd = alloc_guestfd();
- if (guestfd < 0) {
- unlock_user(s, arg0, 0);
- errno = EMFILE;
- return set_swi_errno(env, -1);
- }
-
- if (strcmp(s, ":tt") == 0) {
- int result_fileno;
-
- /*
- * We implement SH_EXT_STDOUT_STDERR, so:
- * open for read == stdin
- * open for write == stdout
- * open for append == stderr
- */
- if (arg1 < 4) {
- result_fileno = STDIN_FILENO;
- } else if (arg1 < 8) {
- result_fileno = STDOUT_FILENO;
- } else {
- result_fileno = STDERR_FILENO;
- }
- associate_guestfd(guestfd, result_fileno);
- unlock_user(s, arg0, 0);
- return guestfd;
- }
- if (strcmp(s, ":semihosting-features") == 0) {
- unlock_user(s, arg0, 0);
- /* We must fail opens for modes other than 0 ('r') or 1 ('rb') */
- if (arg1 != 0 && arg1 != 1) {
- dealloc_guestfd(guestfd);
- errno = EACCES;
- return set_swi_errno(env, -1);
- }
- init_featurefile_guestfd(guestfd);
- return guestfd;
- }
-
- if (use_gdb_syscalls()) {
- arm_semi_open_guestfd = guestfd;
- ret = arm_gdb_syscall(cpu, arm_semi_open_cb, "open,%s,%x,1a4", arg0,
- (int)arg2 + 1, gdb_open_modeflags[arg1]);
- } else {
- ret = set_swi_errno(env, open(s, open_modeflags[arg1], 0644));
- if (ret == (uint32_t)-1) {
- dealloc_guestfd(guestfd);
- } else {
- associate_guestfd(guestfd, ret);
- ret = guestfd;
- }
- }
- unlock_user(s, arg0, 0);
- return ret;
- }
- case TARGET_SYS_CLOSE:
- GET_ARG(0);
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- ret = guestfd_fns[gf->type].closefn(cpu, gf);
- dealloc_guestfd(arg0);
- return ret;
- case TARGET_SYS_WRITEC:
- qemu_semihosting_console_outc(env, args);
- return 0xdeadbeef;
- case TARGET_SYS_WRITE0:
- return qemu_semihosting_console_outs(env, args);
- case TARGET_SYS_WRITE:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- len = arg2;
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- return guestfd_fns[gf->type].writefn(cpu, gf, arg1, len);
- case TARGET_SYS_READ:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- len = arg2;
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- return guestfd_fns[gf->type].readfn(cpu, gf, arg1, len);
- case TARGET_SYS_READC:
- return qemu_semihosting_console_inc(env);
- case TARGET_SYS_ISTTY:
- GET_ARG(0);
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- return guestfd_fns[gf->type].isattyfn(cpu, gf);
- case TARGET_SYS_SEEK:
- GET_ARG(0);
- GET_ARG(1);
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- return guestfd_fns[gf->type].seekfn(cpu, gf, arg1);
- case TARGET_SYS_FLEN:
- GET_ARG(0);
-
- gf = get_guestfd(arg0);
- if (!gf) {
- errno = EBADF;
- return set_swi_errno(env, -1);
- }
-
- return guestfd_fns[gf->type].flenfn(cpu, gf);
- case TARGET_SYS_TMPNAM:
- qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__);
- return -1;
- case TARGET_SYS_REMOVE:
- GET_ARG(0);
- GET_ARG(1);
- if (use_gdb_syscalls()) {
- ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s",
- arg0, (int)arg1 + 1);
- } else {
- s = lock_user_string(arg0);
- if (!s) {
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
- ret = set_swi_errno(env, remove(s));
- unlock_user(s, arg0, 0);
- }
- return ret;
- case TARGET_SYS_RENAME:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- GET_ARG(3);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s",
- arg0, (int)arg1 + 1, arg2, (int)arg3 + 1);
- } else {
- char *s2;
- s = lock_user_string(arg0);
- s2 = lock_user_string(arg2);
- if (!s || !s2) {
- errno = EFAULT;
- ret = set_swi_errno(env, -1);
- } else {
- ret = set_swi_errno(env, rename(s, s2));
- }
- if (s2)
- unlock_user(s2, arg2, 0);
- if (s)
- unlock_user(s, arg0, 0);
- return ret;
- }
- case TARGET_SYS_CLOCK:
- return clock() / (CLOCKS_PER_SEC / 100);
- case TARGET_SYS_TIME:
- return set_swi_errno(env, time(NULL));
- case TARGET_SYS_SYSTEM:
- GET_ARG(0);
- GET_ARG(1);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s",
- arg0, (int)arg1 + 1);
- } else {
- s = lock_user_string(arg0);
- if (!s) {
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
- ret = set_swi_errno(env, system(s));
- unlock_user(s, arg0, 0);
- return ret;
- }
- case TARGET_SYS_ERRNO:
- return get_swi_errno(env);
- case TARGET_SYS_GET_CMDLINE:
- {
- /* Build a command-line from the original argv.
- *
- * The inputs are:
- * * arg0, pointer to a buffer of at least the size
- * specified in arg1.
- * * arg1, size of the buffer pointed to by arg0 in
- * bytes.
- *
- * The outputs are:
- * * arg0, pointer to null-terminated string of the
- * command line.
- * * arg1, length of the string pointed to by arg0.
- */
-
- char *output_buffer;
- size_t input_size;
- size_t output_size;
- int status = 0;
-#if !defined(CONFIG_USER_ONLY)
- const char *cmdline;
-#else
- TaskState *ts = cs->opaque;
-#endif
- GET_ARG(0);
- GET_ARG(1);
- input_size = arg1;
- /* Compute the size of the output string. */
-#if !defined(CONFIG_USER_ONLY)
- cmdline = semihosting_get_cmdline();
- if (cmdline == NULL) {
- cmdline = ""; /* Default to an empty line. */
- }
- output_size = strlen(cmdline) + 1; /* Count terminating 0. */
-#else
- unsigned int i;
-
- output_size = ts->info->arg_end - ts->info->arg_start;
- if (!output_size) {
- /*
- * We special-case the "empty command line" case (argc==0).
- * Just provide the terminating 0.
- */
- output_size = 1;
- }
-#endif
-
- if (output_size > input_size) {
- /* Not enough space to store command-line arguments. */
- errno = E2BIG;
- return set_swi_errno(env, -1);
- }
-
- /* Adjust the command-line length. */
- if (SET_ARG(1, output_size - 1)) {
- /* Couldn't write back to argument block */
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
-
- /* Lock the buffer on the ARM side. */
- output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
- if (!output_buffer) {
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
-
- /* Copy the command-line arguments. */
-#if !defined(CONFIG_USER_ONLY)
- pstrcpy(output_buffer, output_size, cmdline);
-#else
- if (output_size == 1) {
- /* Empty command-line. */
- output_buffer[0] = '\0';
- goto out;
- }
-
- if (copy_from_user(output_buffer, ts->info->arg_start,
- output_size)) {
- errno = EFAULT;
- status = set_swi_errno(env, -1);
- goto out;
- }
-
- /* Separate arguments by white spaces. */
- for (i = 0; i < output_size - 1; i++) {
- if (output_buffer[i] == 0) {
- output_buffer[i] = ' ';
- }
- }
- out:
-#endif
- /* Unlock the buffer on the ARM side. */
- unlock_user(output_buffer, arg0, output_size);
-
- return status;
- }
- case TARGET_SYS_HEAPINFO:
- {
- target_ulong retvals[4];
- target_ulong limit;
- int i;
-#ifdef CONFIG_USER_ONLY
- TaskState *ts = cs->opaque;
-#else
- const struct arm_boot_info *info = env->boot_info;
- target_ulong rambase = info->loader_start;
-#endif
-
- GET_ARG(0);
-
-#ifdef CONFIG_USER_ONLY
- /*
- * Some C libraries assume the heap immediately follows .bss, so
- * allocate it using sbrk.
- */
- if (!ts->heap_limit) {
- abi_ulong ret;
-
- ts->heap_base = do_brk(0);
- limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
- /* Try a big heap, and reduce the size if that fails. */
- for (;;) {
- ret = do_brk(limit);
- if (ret >= limit) {
- break;
- }
- limit = (ts->heap_base >> 1) + (limit >> 1);
- }
- ts->heap_limit = limit;
- }
-
- retvals[0] = ts->heap_base;
- retvals[1] = ts->heap_limit;
- retvals[2] = ts->stack_base;
- retvals[3] = 0; /* Stack limit. */
-#else
- limit = current_machine->ram_size;
- /* TODO: Make this use the limit of the loaded application. */
- retvals[0] = rambase + limit / 2;
- retvals[1] = rambase + limit;
- retvals[2] = rambase + limit; /* Stack base */
- retvals[3] = rambase; /* Stack limit. */
-#endif
-
- for (i = 0; i < ARRAY_SIZE(retvals); i++) {
- bool fail;
-
- if (is_a64(env)) {
- fail = put_user_u64(retvals[i], arg0 + i * 8);
- } else {
- fail = put_user_u32(retvals[i], arg0 + i * 4);
- }
-
- if (fail) {
- /* Couldn't write back to argument block */
- errno = EFAULT;
- return set_swi_errno(env, -1);
- }
- }
- return 0;
- }
- case TARGET_SYS_EXIT:
- case TARGET_SYS_EXIT_EXTENDED:
- if (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(env)) {
- /*
- * The A64 version of SYS_EXIT takes a parameter block,
- * so the application-exit type can return a subcode which
- * is the exit status code from the application.
- * SYS_EXIT_EXTENDED is an a new-in-v2.0 optional function
- * which allows A32/T32 guests to also provide a status code.
- */
- GET_ARG(0);
- GET_ARG(1);
-
- if (arg0 == ADP_Stopped_ApplicationExit) {
- ret = arg1;
- } else {
- ret = 1;
- }
- } else {
- /*
- * The A32/T32 version of SYS_EXIT specifies only
- * Stopped_ApplicationExit as normal exit, but does not
- * allow the guest to specify the exit status code.
- * Everything else is considered an error.
- */
- ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
- }
- gdb_exit(ret);
- exit(ret);
- case TARGET_SYS_SYNCCACHE:
- /*
- * Clean the D-cache and invalidate the I-cache for the specified
- * virtual address range. This is a nop for us since we don't
- * implement caches. This is only present on A64.
- */
- if (is_a64(env)) {
- return 0;
- }
- /* fall through -- invalid for A32/T32 */
- default:
- fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
- cpu_dump_state(cs, stderr, 0);
- abort();
- }
-}
))
arm_ss.add(zlib)
-arm_ss.add(when: 'CONFIG_TCG', if_true: files('arm-semi.c'))
-
arm_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c', 'kvm64.c'), if_false: files('kvm-stub.c'))
arm_ss.add(when: 'TARGET_AARCH64', if_true: files(
projects / qemu.git / commitdiff