1 /* 2 * GDB Syscall support 3 * 4 * Copyright (c) 2023 Linaro Ltd 5 * 6 * SPDX-License-Identifier: LGPL-2.0+ 7 */ 8 9 #ifndef _SYSCALLS_H_ 10 #define _SYSCALLS_H_ 11 12 /* For gdb file i/o remote protocol open flags. */ 13 #define GDB_O_RDONLY 0 14 #define GDB_O_WRONLY 1 15 #define GDB_O_RDWR 2 16 #define GDB_O_APPEND 8 17 #define GDB_O_CREAT 0x200 18 #define GDB_O_TRUNC 0x400 19 #define GDB_O_EXCL 0x800 20 21 /* For gdb file i/o remote protocol errno values */ 22 #define GDB_EPERM 1 23 #define GDB_ENOENT 2 24 #define GDB_EINTR 4 25 #define GDB_EBADF 9 26 #define GDB_EACCES 13 27 #define GDB_EFAULT 14 28 #define GDB_EBUSY 16 29 #define GDB_EEXIST 17 30 #define GDB_ENODEV 19 31 #define GDB_ENOTDIR 20 32 #define GDB_EISDIR 21 33 #define GDB_EINVAL 22 34 #define GDB_ENFILE 23 35 #define GDB_EMFILE 24 36 #define GDB_EFBIG 27 37 #define GDB_ENOSPC 28 38 #define GDB_ESPIPE 29 39 #define GDB_EROFS 30 40 #define GDB_ENAMETOOLONG 91 41 #define GDB_EUNKNOWN 9999 42 43 /* For gdb file i/o remote protocol lseek whence. */ 44 #define GDB_SEEK_SET 0 45 #define GDB_SEEK_CUR 1 46 #define GDB_SEEK_END 2 47 48 /* For gdb file i/o stat/fstat. */ 49 typedef uint32_t gdb_mode_t; 50 typedef uint32_t gdb_time_t; 51 52 struct gdb_stat { 53 uint32_t gdb_st_dev; /* device */ 54 uint32_t gdb_st_ino; /* inode */ 55 gdb_mode_t gdb_st_mode; /* protection */ 56 uint32_t gdb_st_nlink; /* number of hard links */ 57 uint32_t gdb_st_uid; /* user ID of owner */ 58 uint32_t gdb_st_gid; /* group ID of owner */ 59 uint32_t gdb_st_rdev; /* device type (if inode device) */ 60 uint64_t gdb_st_size; /* total size, in bytes */ 61 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */ 62 uint64_t gdb_st_blocks; /* number of blocks allocated */ 63 gdb_time_t gdb_st_atime; /* time of last access */ 64 gdb_time_t gdb_st_mtime; /* time of last modification */ 65 gdb_time_t gdb_st_ctime; /* time of last change */ 66 } QEMU_PACKED; 67 68 struct gdb_timeval { 69 gdb_time_t tv_sec; /* second */ 70 uint64_t tv_usec; /* microsecond */ 71 } QEMU_PACKED; 72 73 typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, uint64_t ret, int err); 74 75 /** 76 * gdb_do_syscall: 77 * @cb: function to call when the system call has completed 78 * @fmt: gdb syscall format string 79 * ...: list of arguments to interpolate into @fmt 80 * 81 * Send a GDB syscall request. This function will return immediately; 82 * the callback function will be called later when the remote system 83 * call has completed. 84 * 85 * @fmt should be in the 'call-id,parameter,parameter...' format documented 86 * for the F request packet in the GDB remote protocol. A limited set of 87 * printf-style format specifiers is supported: 88 * %x - target_ulong argument printed in hex 89 * %lx - 64-bit argument printed in hex 90 * %s - string pointer (target_ulong) and length (int) pair 91 */ 92 void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...); 93 94 /** 95 * use_gdb_syscalls() - report if GDB should be used for syscalls 96 * 97 * This is mostly driven by the semihosting mode the user configures 98 * but assuming GDB is allowed by that we report true if GDB is 99 * connected to the stub. 100 */ 101 int use_gdb_syscalls(void); 102 103 /** 104 * gdb_exit: exit gdb session, reporting inferior status 105 * @code: exit code reported 106 * 107 * This closes the session and sends a final packet to GDB reporting 108 * the exit status of the program. It also cleans up any connections 109 * detritus before returning. 110 */ 111 void gdb_exit(int code); 112 113 #endif /* _SYSCALLS_H_ */ 114