diff options
Diffstat (limited to 'target/lm32/lm32-semi.c')
| -rw-r--r-- | target/lm32/lm32-semi.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/target/lm32/lm32-semi.c b/target/lm32/lm32-semi.c deleted file mode 100644 index 661a770249..0000000000 --- a/target/lm32/lm32-semi.c +++ /dev/null @@ -1,211 +0,0 @@ -/* - * Lattice Mico32 semihosting syscall interface - * - * Copyright (c) 2014 Michael Walle <michael@walle.cc> - * - * Based on target/m68k/m68k-semi.c, which is - * Copyright (c) 2005-2007 CodeSourcery. - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - */ - -#include "qemu/osdep.h" -#include "cpu.h" -#include "exec/helper-proto.h" -#include "exec/softmmu-semi.h" - -enum { - TARGET_SYS_exit = 1, - TARGET_SYS_open = 2, - TARGET_SYS_close = 3, - TARGET_SYS_read = 4, - TARGET_SYS_write = 5, - TARGET_SYS_lseek = 6, - TARGET_SYS_fstat = 10, - TARGET_SYS_stat = 15, -}; - -enum { - NEWLIB_O_RDONLY = 0x0, - NEWLIB_O_WRONLY = 0x1, - NEWLIB_O_RDWR = 0x2, - NEWLIB_O_APPEND = 0x8, - NEWLIB_O_CREAT = 0x200, - NEWLIB_O_TRUNC = 0x400, - NEWLIB_O_EXCL = 0x800, -}; - -static int translate_openflags(int flags) -{ - int hf; - - if (flags & NEWLIB_O_WRONLY) { - hf = O_WRONLY; - } else if (flags & NEWLIB_O_RDWR) { - hf = O_RDWR; - } else { - hf = O_RDONLY; - } - - if (flags & NEWLIB_O_APPEND) { - hf |= O_APPEND; - } - - if (flags & NEWLIB_O_CREAT) { - hf |= O_CREAT; - } - - if (flags & NEWLIB_O_TRUNC) { - hf |= O_TRUNC; - } - - if (flags & NEWLIB_O_EXCL) { - hf |= O_EXCL; - } - - return hf; -} - -struct newlib_stat { - int16_t newlib_st_dev; /* device */ - uint16_t newlib_st_ino; /* inode */ - uint16_t newlib_st_mode; /* protection */ - uint16_t newlib_st_nlink; /* number of hard links */ - uint16_t newlib_st_uid; /* user ID of owner */ - uint16_t newlib_st_gid; /* group ID of owner */ - int16_t newlib_st_rdev; /* device type (if inode device) */ - int32_t newlib_st_size; /* total size, in bytes */ - int32_t newlib_st_atime; /* time of last access */ - uint32_t newlib_st_spare1; - int32_t newlib_st_mtime; /* time of last modification */ - uint32_t newlib_st_spare2; - int32_t newlib_st_ctime; /* time of last change */ - uint32_t newlib_st_spare3; -} QEMU_PACKED; - -static int translate_stat(CPULM32State *env, target_ulong addr, - struct stat *s) -{ - struct newlib_stat *p; - - p = lock_user(VERIFY_WRITE, addr, sizeof(struct newlib_stat), 0); - if (!p) { - return 0; - } - p->newlib_st_dev = cpu_to_be16(s->st_dev); - p->newlib_st_ino = cpu_to_be16(s->st_ino); - p->newlib_st_mode = cpu_to_be16(s->st_mode); - p->newlib_st_nlink = cpu_to_be16(s->st_nlink); - p->newlib_st_uid = cpu_to_be16(s->st_uid); - p->newlib_st_gid = cpu_to_be16(s->st_gid); - p->newlib_st_rdev = cpu_to_be16(s->st_rdev); - p->newlib_st_size = cpu_to_be32(s->st_size); - p->newlib_st_atime = cpu_to_be32(s->st_atime); - p->newlib_st_mtime = cpu_to_be32(s->st_mtime); - p->newlib_st_ctime = cpu_to_be32(s->st_ctime); - unlock_user(p, addr, sizeof(struct newlib_stat)); - - return 1; -} - -bool lm32_cpu_do_semihosting(CPUState *cs) -{ - LM32CPU *cpu = LM32_CPU(cs); - CPULM32State *env = &cpu->env; - - int ret = -1; - target_ulong nr, arg0, arg1, arg2; - void *p; - struct stat s; - - nr = env->regs[R_R8]; - arg0 = env->regs[R_R1]; - arg1 = env->regs[R_R2]; - arg2 = env->regs[R_R3]; - - switch (nr) { - case TARGET_SYS_exit: - /* void _exit(int rc) */ - exit(arg0); - - case TARGET_SYS_open: - /* int open(const char *pathname, int flags) */ - p = lock_user_string(arg0); - if (!p) { - ret = -1; - } else { - ret = open(p, translate_openflags(arg2)); - unlock_user(p, arg0, 0); - } - break; - - case TARGET_SYS_read: - /* ssize_t read(int fd, const void *buf, size_t count) */ - p = lock_user(VERIFY_WRITE, arg1, arg2, 0); - if (!p) { - ret = -1; - } else { - ret = read(arg0, p, arg2); - unlock_user(p, arg1, arg2); - } - break; - - case TARGET_SYS_write: - /* ssize_t write(int fd, const void *buf, size_t count) */ - p = lock_user(VERIFY_READ, arg1, arg2, 1); - if (!p) { - ret = -1; - } else { - ret = write(arg0, p, arg2); - unlock_user(p, arg1, 0); - } - break; - - case TARGET_SYS_close: - /* int close(int fd) */ - /* don't close stdin/stdout/stderr */ - if (arg0 > 2) { - ret = close(arg0); - } else { - ret = 0; - } - break; - - case TARGET_SYS_lseek: - /* off_t lseek(int fd, off_t offset, int whence */ - ret = lseek(arg0, arg1, arg2); - break; - - case TARGET_SYS_stat: - /* int stat(const char *path, struct stat *buf) */ - p = lock_user_string(arg0); - if (!p) { - ret = -1; - } else { - ret = stat(p, &s); - unlock_user(p, arg0, 0); - if (translate_stat(env, arg1, &s) == 0) { - ret = -1; - } - } - break; - - case TARGET_SYS_fstat: - /* int stat(int fd, struct stat *buf) */ - ret = fstat(arg0, &s); - if (ret == 0) { - if (translate_stat(env, arg1, &s) == 0) { - ret = -1; - } - } - break; - - default: - /* unhandled */ - return false; - } - - env->regs[R_R1] = ret; - return true; -} |