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-rw-r--r--qemu/target-arm/arm-semi.c651
1 files changed, 0 insertions, 651 deletions
diff --git a/qemu/target-arm/arm-semi.c b/qemu/target-arm/arm-semi.c
deleted file mode 100644
index 8be0645eb..000000000
--- a/qemu/target-arm/arm-semi.c
+++ /dev/null
@@ -1,651 +0,0 @@
-/*
- * Arm "Angel" semihosting syscalls
- *
- * Copyright (c) 2005, 2007 CodeSourcery.
- * 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/>.
- */
-
-#include "qemu/osdep.h"
-
-#include "cpu.h"
-#include "exec/semihost.h"
-#ifdef CONFIG_USER_ONLY
-#include "qemu.h"
-
-#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
-#else
-#include "qemu-common.h"
-#include "exec/gdbstub.h"
-#include "hw/arm/arm.h"
-#include "qemu/cutils.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
-
-/* 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
-};
-
-#ifdef CONFIG_USER_ONLY
-static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
-{
- if (code == (uint32_t)-1)
- ts->swi_errno = errno;
- return code;
-}
-#else
-static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
-{
- return code;
-}
-
-#include "exec/softmmu-semi.h"
-#endif
-
-static target_ulong arm_semi_syscall_len;
-
-#if !defined(CONFIG_USER_ONLY)
-static target_ulong syscall_err;
-#endif
-
-static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
-{
- ARMCPU *cpu = ARM_CPU(cs);
- CPUARMState *env = &cpu->env;
-#ifdef CONFIG_USER_ONLY
- TaskState *ts = cs->opaque;
-#endif
- target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
-
- if (ret == (target_ulong)-1) {
-#ifdef CONFIG_USER_ONLY
- ts->swi_errno = err;
-#else
- syscall_err = err;
-#endif
- 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;
- }
-#ifdef CONFIG_USER_ONLY
- ((TaskState *)cs->opaque)->swi_errno = err;
-#else
- syscall_err = err;
-#endif
-}
-
-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: we are implicitly relying on the syscall completing
- * before this point, which is not guaranteed. We should
- * put in an explicit synchronization between this and
- * the callback function.
- */
-
- return is_a64(env) ? env->xregs[0] : env->regs[0];
-}
-
-/* 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)) { \
- return -1; \
- } \
- } else { \
- if (get_user_u32(arg ## n, args + (n) * 4)) { \
- return -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))
-
-target_ulong do_arm_semihosting(CPUARMState *env)
-{
- ARMCPU *cpu = arm_env_get_cpu(env);
- CPUState *cs = CPU(cpu);
- target_ulong args;
- target_ulong arg0, arg1, arg2, arg3;
- char * s;
- int nr;
- uint32_t ret;
- uint32_t len;
-#ifdef CONFIG_USER_ONLY
- TaskState *ts = cs->opaque;
-#else
- CPUARMState *ts = env;
-#endif
-
- 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:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- s = lock_user_string(arg0);
- if (!s) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- if (arg1 >= 12) {
- unlock_user(s, arg0, 0);
- return (uint32_t)-1;
- }
- if (strcmp(s, ":tt") == 0) {
- int result_fileno = arg1 < 4 ? STDIN_FILENO : STDOUT_FILENO;
- unlock_user(s, arg0, 0);
- return result_fileno;
- }
- if (use_gdb_syscalls()) {
- ret = arm_gdb_syscall(cpu, arm_semi_cb, "open,%s,%x,1a4", arg0,
- (int)arg2+1, gdb_open_modeflags[arg1]);
- } else {
- ret = set_swi_errno(ts, open(s, open_modeflags[arg1], 0644));
- }
- unlock_user(s, arg0, 0);
- return ret;
- case TARGET_SYS_CLOSE:
- GET_ARG(0);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", arg0);
- } else {
- return set_swi_errno(ts, close(arg0));
- }
- case TARGET_SYS_WRITEC:
- {
- char c;
-
- if (get_user_u8(c, args))
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- /* Write to debug console. stderr is near enough. */
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,1", args);
- } else {
- return write(STDERR_FILENO, &c, 1);
- }
- }
- case TARGET_SYS_WRITE0:
- if (!(s = lock_user_string(args)))
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- len = strlen(s);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,%x",
- args, len);
- } else {
- ret = write(STDERR_FILENO, s, len);
- }
- unlock_user(s, args, 0);
- return ret;
- case TARGET_SYS_WRITE:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- len = arg2;
- if (use_gdb_syscalls()) {
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
- arg0, arg1, len);
- } else {
- s = lock_user(VERIFY_READ, arg1, len, 1);
- if (!s) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- ret = set_swi_errno(ts, write(arg0, s, len));
- unlock_user(s, arg1, 0);
- if (ret == (uint32_t)-1)
- return -1;
- return len - ret;
- }
- case TARGET_SYS_READ:
- GET_ARG(0);
- GET_ARG(1);
- GET_ARG(2);
- len = arg2;
- if (use_gdb_syscalls()) {
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
- arg0, arg1, len);
- } else {
- s = lock_user(VERIFY_WRITE, arg1, len, 0);
- if (!s) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- do {
- ret = set_swi_errno(ts, read(arg0, s, len));
- } while (ret == -1 && errno == EINTR);
- unlock_user(s, arg1, len);
- if (ret == (uint32_t)-1)
- return -1;
- return len - ret;
- }
- case TARGET_SYS_READC:
- /* XXX: Read from debug console. Not implemented. */
- return 0;
- case TARGET_SYS_ISTTY:
- GET_ARG(0);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", arg0);
- } else {
- return isatty(arg0);
- }
- case TARGET_SYS_SEEK:
- GET_ARG(0);
- GET_ARG(1);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0",
- arg0, arg1);
- } else {
- ret = set_swi_errno(ts, lseek(arg0, arg1, SEEK_SET));
- if (ret == (uint32_t)-1)
- return -1;
- return 0;
- }
- case TARGET_SYS_FLEN:
- GET_ARG(0);
- if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x",
- arg0, arm_flen_buf(cpu));
- } else {
- struct stat buf;
- ret = set_swi_errno(ts, fstat(arg0, &buf));
- if (ret == (uint32_t)-1)
- return -1;
- return buf.st_size;
- }
- case TARGET_SYS_TMPNAM:
- /* XXX: Not implemented. */
- 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) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- ret = set_swi_errno(ts, 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)
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- ret = (uint32_t)-1;
- else
- ret = set_swi_errno(ts, 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(ts, 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) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- ret = set_swi_errno(ts, system(s));
- unlock_user(s, arg0, 0);
- return ret;
- }
- case TARGET_SYS_ERRNO:
-#ifdef CONFIG_USER_ONLY
- return ts->swi_errno;
-#else
- return syscall_err;
-#endif
- 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;
-#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. */
- return -1;
- }
-
- /* Adjust the command-line length. */
- if (SET_ARG(1, output_size - 1)) {
- /* Couldn't write back to argument block */
- return -1;
- }
-
- /* Lock the buffer on the ARM side. */
- output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
- if (!output_buffer) {
- return -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)) {
- status = -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:
- {
- uint32_t *ptr;
- uint32_t limit;
- 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;
- }
-
- ptr = lock_user(VERIFY_WRITE, arg0, 16, 0);
- if (!ptr) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- ptr[0] = tswap32(ts->heap_base);
- ptr[1] = tswap32(ts->heap_limit);
- ptr[2] = tswap32(ts->stack_base);
- ptr[3] = tswap32(0); /* Stack limit. */
- unlock_user(ptr, arg0, 16);
-#else
- limit = ram_size;
- ptr = lock_user(VERIFY_WRITE, arg0, 16, 0);
- if (!ptr) {
- /* FIXME - should this error code be -TARGET_EFAULT ? */
- return (uint32_t)-1;
- }
- /* TODO: Make this use the limit of the loaded application. */
- ptr[0] = tswap32(limit / 2);
- ptr[1] = tswap32(limit);
- ptr[2] = tswap32(limit); /* Stack base */
- ptr[3] = tswap32(0); /* Stack limit. */
- unlock_user(ptr, arg0, 16);
-#endif
- return 0;
- }
- case TARGET_SYS_EXIT:
- if (is_a64(env)) {
- /* The A64 version of this call takes a parameter block,
- * so the application-exit type can return a subcode which
- * is the exit status code from the application.
- */
- GET_ARG(0);
- GET_ARG(1);
-
- if (arg0 == ADP_Stopped_ApplicationExit) {
- ret = arg1;
- } else {
- ret = 1;
- }
- } else {
- /* ARM specifies only Stopped_ApplicationExit as normal
- * exit, everything else is considered an error */
- ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
- }
- gdb_exit(env, 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, fprintf, 0);
- abort();
- }
-}