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1 | e88de099 | bellard | #ifndef QEMU_H
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2 | e88de099 | bellard | #define QEMU_H
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3 | 31e31b8a | bellard | |
4 | 9de5e440 | bellard | #include <signal.h> |
5 | edf779ff | bellard | #include <string.h> |
6 | 31e31b8a | bellard | |
7 | 6180a181 | bellard | #include "cpu.h" |
8 | 992f48a0 | blueswir1 | |
9 | 06177d36 | balrog | #undef DEBUG_REMAP
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10 | 06177d36 | balrog | #ifdef DEBUG_REMAP
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11 | 06177d36 | balrog | #include <stdlib.h> |
12 | 06177d36 | balrog | #endif /* DEBUG_REMAP */ |
13 | 06177d36 | balrog | |
14 | 992f48a0 | blueswir1 | #ifdef TARGET_ABI32
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15 | 992f48a0 | blueswir1 | typedef uint32_t abi_ulong;
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16 | 992f48a0 | blueswir1 | typedef int32_t abi_long;
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17 | f3e3285d | ths | #define TARGET_ABI_FMT_lx "%08x" |
18 | f3e3285d | ths | #define TARGET_ABI_FMT_ld "%d" |
19 | f3e3285d | ths | #define TARGET_ABI_FMT_lu "%u" |
20 | 992f48a0 | blueswir1 | #define TARGET_ABI_BITS 32 |
21 | 992f48a0 | blueswir1 | #else
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22 | 992f48a0 | blueswir1 | typedef target_ulong abi_ulong;
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23 | 992f48a0 | blueswir1 | typedef target_long abi_long;
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24 | f3e3285d | ths | #define TARGET_ABI_FMT_lx TARGET_FMT_lx
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25 | f3e3285d | ths | #define TARGET_ABI_FMT_ld TARGET_FMT_ld
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26 | f3e3285d | ths | #define TARGET_ABI_FMT_lu TARGET_FMT_lu
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27 | 992f48a0 | blueswir1 | #define TARGET_ABI_BITS TARGET_LONG_BITS
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28 | 4683b130 | bellard | /* for consistency, define ABI32 too */
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29 | 4683b130 | bellard | #if TARGET_ABI_BITS == 32 |
30 | 4683b130 | bellard | #define TARGET_ABI32 1 |
31 | 4683b130 | bellard | #endif
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32 | 992f48a0 | blueswir1 | #endif
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33 | 992f48a0 | blueswir1 | |
34 | 992f48a0 | blueswir1 | #include "thunk.h" |
35 | 992f48a0 | blueswir1 | #include "syscall_defs.h" |
36 | 6180a181 | bellard | #include "syscall.h" |
37 | a04e134a | ths | #include "target_signal.h" |
38 | 1fddef4b | bellard | #include "gdbstub.h" |
39 | 66fb9763 | bellard | |
40 | 31e31b8a | bellard | /* This struct is used to hold certain information about the image.
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41 | 31e31b8a | bellard | * Basically, it replicates in user space what would be certain
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42 | 31e31b8a | bellard | * task_struct fields in the kernel
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43 | 31e31b8a | bellard | */
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44 | 31e31b8a | bellard | struct image_info {
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45 | 992f48a0 | blueswir1 | abi_ulong load_addr; |
46 | 992f48a0 | blueswir1 | abi_ulong start_code; |
47 | 992f48a0 | blueswir1 | abi_ulong end_code; |
48 | 992f48a0 | blueswir1 | abi_ulong start_data; |
49 | 992f48a0 | blueswir1 | abi_ulong end_data; |
50 | 992f48a0 | blueswir1 | abi_ulong start_brk; |
51 | 992f48a0 | blueswir1 | abi_ulong brk; |
52 | 992f48a0 | blueswir1 | abi_ulong start_mmap; |
53 | 992f48a0 | blueswir1 | abi_ulong mmap; |
54 | 992f48a0 | blueswir1 | abi_ulong rss; |
55 | 992f48a0 | blueswir1 | abi_ulong start_stack; |
56 | 992f48a0 | blueswir1 | abi_ulong entry; |
57 | 992f48a0 | blueswir1 | abi_ulong code_offset; |
58 | 992f48a0 | blueswir1 | abi_ulong data_offset; |
59 | 38d0662a | pbrook | char **host_argv;
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60 | 31e31b8a | bellard | int personality;
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61 | 31e31b8a | bellard | }; |
62 | 31e31b8a | bellard | |
63 | b346ff46 | bellard | #ifdef TARGET_I386
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64 | 851e67a1 | bellard | /* Information about the current linux thread */
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65 | 851e67a1 | bellard | struct vm86_saved_state {
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66 | 851e67a1 | bellard | uint32_t eax; /* return code */
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67 | 851e67a1 | bellard | uint32_t ebx; |
68 | 851e67a1 | bellard | uint32_t ecx; |
69 | 851e67a1 | bellard | uint32_t edx; |
70 | 851e67a1 | bellard | uint32_t esi; |
71 | 851e67a1 | bellard | uint32_t edi; |
72 | 851e67a1 | bellard | uint32_t ebp; |
73 | 851e67a1 | bellard | uint32_t esp; |
74 | 851e67a1 | bellard | uint32_t eflags; |
75 | 851e67a1 | bellard | uint32_t eip; |
76 | 851e67a1 | bellard | uint16_t cs, ss, ds, es, fs, gs; |
77 | 851e67a1 | bellard | }; |
78 | b346ff46 | bellard | #endif
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79 | 851e67a1 | bellard | |
80 | 28c4f361 | bellard | #ifdef TARGET_ARM
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81 | 28c4f361 | bellard | /* FPU emulator */
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82 | 28c4f361 | bellard | #include "nwfpe/fpa11.h" |
83 | 28c4f361 | bellard | #endif
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84 | 28c4f361 | bellard | |
85 | 851e67a1 | bellard | /* NOTE: we force a big alignment so that the stack stored after is
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86 | 851e67a1 | bellard | aligned too */
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87 | 851e67a1 | bellard | typedef struct TaskState { |
88 | 851e67a1 | bellard | struct TaskState *next;
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89 | 28c4f361 | bellard | #ifdef TARGET_ARM
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90 | 28c4f361 | bellard | /* FPA state */
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91 | 28c4f361 | bellard | FPA11 fpa; |
92 | a4f81979 | bellard | int swi_errno;
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93 | 28c4f361 | bellard | #endif
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94 | 84409ddb | j_mayer | #if defined(TARGET_I386) && !defined(TARGET_X86_64)
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95 | 992f48a0 | blueswir1 | abi_ulong target_v86; |
96 | 851e67a1 | bellard | struct vm86_saved_state vm86_saved_regs;
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97 | b333af06 | bellard | struct target_vm86plus_struct vm86plus;
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98 | 631271d7 | bellard | uint32_t v86flags; |
99 | 631271d7 | bellard | uint32_t v86mask; |
100 | b346ff46 | bellard | #endif
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101 | e6e5906b | pbrook | #ifdef TARGET_M68K
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102 | e6e5906b | pbrook | int sim_syscalls;
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103 | e6e5906b | pbrook | #endif
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104 | a87295e8 | pbrook | #if defined(TARGET_ARM) || defined(TARGET_M68K)
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105 | a87295e8 | pbrook | /* Extra fields for semihosted binaries. */
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106 | a87295e8 | pbrook | uint32_t stack_base; |
107 | a87295e8 | pbrook | uint32_t heap_base; |
108 | a87295e8 | pbrook | uint32_t heap_limit; |
109 | a87295e8 | pbrook | #endif
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110 | 851e67a1 | bellard | int used; /* non zero if used */ |
111 | 978efd6a | pbrook | struct image_info *info;
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112 | 851e67a1 | bellard | uint8_t stack[0];
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113 | 851e67a1 | bellard | } __attribute__((aligned(16))) TaskState;
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114 | 851e67a1 | bellard | |
115 | 851e67a1 | bellard | extern TaskState *first_task_state;
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116 | c5937220 | pbrook | extern const char *qemu_uname_release; |
117 | 851e67a1 | bellard | |
118 | e5fe0c52 | pbrook | /* ??? See if we can avoid exposing so much of the loader internals. */
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119 | e5fe0c52 | pbrook | /*
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120 | e5fe0c52 | pbrook | * MAX_ARG_PAGES defines the number of pages allocated for arguments
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121 | e5fe0c52 | pbrook | * and envelope for the new program. 32 should suffice, this gives
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122 | e5fe0c52 | pbrook | * a maximum env+arg of 128kB w/4KB pages!
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123 | e5fe0c52 | pbrook | */
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124 | e5fe0c52 | pbrook | #define MAX_ARG_PAGES 32 |
125 | e5fe0c52 | pbrook | |
126 | e5fe0c52 | pbrook | /*
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127 | 5fafdf24 | ths | * This structure is used to hold the arguments that are
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128 | e5fe0c52 | pbrook | * used when loading binaries.
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129 | e5fe0c52 | pbrook | */
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130 | e5fe0c52 | pbrook | struct linux_binprm {
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131 | e5fe0c52 | pbrook | char buf[128]; |
132 | e5fe0c52 | pbrook | void *page[MAX_ARG_PAGES];
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133 | 992f48a0 | blueswir1 | abi_ulong p; |
134 | e5fe0c52 | pbrook | int fd;
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135 | e5fe0c52 | pbrook | int e_uid, e_gid;
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136 | e5fe0c52 | pbrook | int argc, envc;
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137 | e5fe0c52 | pbrook | char **argv;
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138 | e5fe0c52 | pbrook | char **envp;
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139 | e5fe0c52 | pbrook | char * filename; /* Name of binary */ |
140 | e5fe0c52 | pbrook | }; |
141 | e5fe0c52 | pbrook | |
142 | e5fe0c52 | pbrook | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); |
143 | 992f48a0 | blueswir1 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, |
144 | 992f48a0 | blueswir1 | abi_ulong stringp, int push_ptr);
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145 | 5fafdf24 | ths | int loader_exec(const char * filename, char ** argv, char ** envp, |
146 | 01ffc75b | bellard | struct target_pt_regs * regs, struct image_info *infop); |
147 | 31e31b8a | bellard | |
148 | e5fe0c52 | pbrook | int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
149 | e5fe0c52 | pbrook | struct image_info * info);
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150 | e5fe0c52 | pbrook | int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
151 | e5fe0c52 | pbrook | struct image_info * info);
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152 | cb33da57 | blueswir1 | #ifdef TARGET_HAS_ELFLOAD32
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153 | cb33da57 | blueswir1 | int load_elf_binary_multi(struct linux_binprm *bprm, |
154 | cb33da57 | blueswir1 | struct target_pt_regs *regs,
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155 | cb33da57 | blueswir1 | struct image_info *info);
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156 | cb33da57 | blueswir1 | #endif
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157 | e5fe0c52 | pbrook | |
158 | 579a97f7 | bellard | abi_long memcpy_to_target(abi_ulong dest, const void *src, |
159 | 579a97f7 | bellard | unsigned long len); |
160 | 992f48a0 | blueswir1 | void target_set_brk(abi_ulong new_brk);
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161 | 992f48a0 | blueswir1 | abi_long do_brk(abi_ulong new_brk); |
162 | 31e31b8a | bellard | void syscall_init(void); |
163 | 992f48a0 | blueswir1 | abi_long do_syscall(void *cpu_env, int num, abi_long arg1, |
164 | 992f48a0 | blueswir1 | abi_long arg2, abi_long arg3, abi_long arg4, |
165 | 992f48a0 | blueswir1 | abi_long arg5, abi_long arg6); |
166 | 31e31b8a | bellard | void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2))); |
167 | b346ff46 | bellard | extern CPUState *global_env;
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168 | b346ff46 | bellard | void cpu_loop(CPUState *env);
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169 | 32ce6337 | bellard | void init_paths(const char *prefix); |
170 | 32ce6337 | bellard | const char *path(const char *pathname); |
171 | b92c47c1 | ths | char *target_strerror(int err); |
172 | a745ec6d | pbrook | int get_osversion(void); |
173 | 6977fbfd | bellard | |
174 | 6977fbfd | bellard | extern int loglevel; |
175 | 631271d7 | bellard | extern FILE *logfile;
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176 | 631271d7 | bellard | |
177 | b92c47c1 | ths | /* strace.c */
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178 | b92c47c1 | ths | void print_syscall(int num, |
179 | c16f9ed3 | bellard | abi_long arg1, abi_long arg2, abi_long arg3, |
180 | c16f9ed3 | bellard | abi_long arg4, abi_long arg5, abi_long arg6); |
181 | c16f9ed3 | bellard | void print_syscall_ret(int num, abi_long arg1); |
182 | b92c47c1 | ths | extern int do_strace; |
183 | b92c47c1 | ths | |
184 | b346ff46 | bellard | /* signal.c */
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185 | b346ff46 | bellard | void process_pending_signals(void *cpu_env); |
186 | b346ff46 | bellard | void signal_init(void); |
187 | b346ff46 | bellard | int queue_signal(int sig, target_siginfo_t *info); |
188 | b346ff46 | bellard | void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); |
189 | b346ff46 | bellard | void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); |
190 | 4cb05961 | pbrook | int target_to_host_signal(int sig); |
191 | b346ff46 | bellard | long do_sigreturn(CPUState *env);
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192 | b346ff46 | bellard | long do_rt_sigreturn(CPUState *env);
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193 | 579a97f7 | bellard | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); |
194 | b346ff46 | bellard | |
195 | b346ff46 | bellard | #ifdef TARGET_I386
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196 | 631271d7 | bellard | /* vm86.c */
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197 | 631271d7 | bellard | void save_v86_state(CPUX86State *env);
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198 | 447db213 | bellard | void handle_vm86_trap(CPUX86State *env, int trapno); |
199 | 631271d7 | bellard | void handle_vm86_fault(CPUX86State *env);
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200 | 992f48a0 | blueswir1 | int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr); |
201 | 5bfb56b2 | blueswir1 | #elif defined(TARGET_SPARC64)
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202 | 5bfb56b2 | blueswir1 | void sparc64_set_context(CPUSPARCState *env);
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203 | 5bfb56b2 | blueswir1 | void sparc64_get_context(CPUSPARCState *env);
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204 | b346ff46 | bellard | #endif
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205 | 631271d7 | bellard | |
206 | 54936004 | bellard | /* mmap.c */
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207 | 992f48a0 | blueswir1 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); |
208 | 992f48a0 | blueswir1 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
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209 | 992f48a0 | blueswir1 | int flags, int fd, abi_ulong offset); |
210 | 992f48a0 | blueswir1 | int target_munmap(abi_ulong start, abi_ulong len);
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211 | 992f48a0 | blueswir1 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, |
212 | 992f48a0 | blueswir1 | abi_ulong new_size, unsigned long flags, |
213 | 992f48a0 | blueswir1 | abi_ulong new_addr); |
214 | 992f48a0 | blueswir1 | int target_msync(abi_ulong start, abi_ulong len, int flags); |
215 | 54936004 | bellard | |
216 | edf779ff | bellard | /* user access */
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217 | edf779ff | bellard | |
218 | edf779ff | bellard | #define VERIFY_READ 0 |
219 | 579a97f7 | bellard | #define VERIFY_WRITE 1 /* implies read access */ |
220 | edf779ff | bellard | |
221 | dae3270c | bellard | static inline int access_ok(int type, abi_ulong addr, abi_ulong size) |
222 | dae3270c | bellard | { |
223 | dae3270c | bellard | return page_check_range((target_ulong)addr, size,
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224 | dae3270c | bellard | (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
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225 | dae3270c | bellard | } |
226 | edf779ff | bellard | |
227 | 89343ecd | ths | /* NOTE __get_user and __put_user use host pointers and don't check access. */
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228 | 579a97f7 | bellard | /* These are usually used to access struct data members once the
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229 | 579a97f7 | bellard | * struct has been locked - usually with lock_user_struct().
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230 | 579a97f7 | bellard | */
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231 | 89343ecd | ths | #define __put_user(x, hptr)\
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232 | edf779ff | bellard | ({\ |
233 | 89343ecd | ths | int size = sizeof(*hptr);\ |
234 | edf779ff | bellard | switch(size) {\
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235 | edf779ff | bellard | case 1:\ |
236 | 2f619698 | bellard | *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ |
237 | edf779ff | bellard | break;\
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238 | edf779ff | bellard | case 2:\ |
239 | 89343ecd | ths | *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ |
240 | edf779ff | bellard | break;\
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241 | edf779ff | bellard | case 4:\ |
242 | 89343ecd | ths | *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ |
243 | edf779ff | bellard | break;\
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244 | edf779ff | bellard | case 8:\ |
245 | 89343ecd | ths | *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ |
246 | edf779ff | bellard | break;\
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247 | edf779ff | bellard | default:\
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248 | edf779ff | bellard | abort();\ |
249 | edf779ff | bellard | }\ |
250 | edf779ff | bellard | 0;\
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251 | edf779ff | bellard | }) |
252 | edf779ff | bellard | |
253 | 89343ecd | ths | #define __get_user(x, hptr) \
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254 | edf779ff | bellard | ({\ |
255 | 89343ecd | ths | int size = sizeof(*hptr);\ |
256 | edf779ff | bellard | switch(size) {\
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257 | edf779ff | bellard | case 1:\ |
258 | 89343ecd | ths | x = (typeof(*hptr))*(uint8_t *)(hptr);\ |
259 | edf779ff | bellard | break;\
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260 | edf779ff | bellard | case 2:\ |
261 | 89343ecd | ths | x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ |
262 | edf779ff | bellard | break;\
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263 | edf779ff | bellard | case 4:\ |
264 | 89343ecd | ths | x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ |
265 | edf779ff | bellard | break;\
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266 | edf779ff | bellard | case 8:\ |
267 | 89343ecd | ths | x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ |
268 | edf779ff | bellard | break;\
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269 | edf779ff | bellard | default:\
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270 | 2f619698 | bellard | /* avoid warning */\
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271 | 2f619698 | bellard | x = 0;\
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272 | edf779ff | bellard | abort();\ |
273 | edf779ff | bellard | }\ |
274 | edf779ff | bellard | 0;\
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275 | edf779ff | bellard | }) |
276 | edf779ff | bellard | |
277 | 579a97f7 | bellard | /* put_user()/get_user() take a guest address and check access */
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278 | 579a97f7 | bellard | /* These are usually used to access an atomic data type, such as an int,
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279 | 579a97f7 | bellard | * that has been passed by address. These internally perform locking
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280 | 579a97f7 | bellard | * and unlocking on the data type.
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281 | 579a97f7 | bellard | */
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282 | 579a97f7 | bellard | #define put_user(x, gaddr, target_type) \
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283 | 579a97f7 | bellard | ({ \ |
284 | 579a97f7 | bellard | abi_ulong __gaddr = (gaddr); \ |
285 | 579a97f7 | bellard | target_type *__hptr; \ |
286 | 579a97f7 | bellard | abi_long __ret; \ |
287 | 579a97f7 | bellard | if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ |
288 | 579a97f7 | bellard | __ret = __put_user((x), __hptr); \ |
289 | 579a97f7 | bellard | unlock_user(__hptr, __gaddr, sizeof(target_type)); \
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290 | 579a97f7 | bellard | } else \
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291 | 579a97f7 | bellard | __ret = -TARGET_EFAULT; \ |
292 | 579a97f7 | bellard | __ret; \ |
293 | edf779ff | bellard | }) |
294 | edf779ff | bellard | |
295 | 579a97f7 | bellard | #define get_user(x, gaddr, target_type) \
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296 | 579a97f7 | bellard | ({ \ |
297 | 579a97f7 | bellard | abi_ulong __gaddr = (gaddr); \ |
298 | 579a97f7 | bellard | target_type *__hptr; \ |
299 | 579a97f7 | bellard | abi_long __ret; \ |
300 | 579a97f7 | bellard | if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ |
301 | 579a97f7 | bellard | __ret = __get_user((x), __hptr); \ |
302 | 579a97f7 | bellard | unlock_user(__hptr, __gaddr, 0); \
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303 | 2f619698 | bellard | } else { \
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304 | 2f619698 | bellard | /* avoid warning */ \
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305 | 2f619698 | bellard | (x) = 0; \
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306 | 579a97f7 | bellard | __ret = -TARGET_EFAULT; \ |
307 | 2f619698 | bellard | } \ |
308 | 579a97f7 | bellard | __ret; \ |
309 | edf779ff | bellard | }) |
310 | edf779ff | bellard | |
311 | 2f619698 | bellard | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
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312 | 2f619698 | bellard | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
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313 | 2f619698 | bellard | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
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314 | 2f619698 | bellard | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
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315 | 2f619698 | bellard | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
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316 | 2f619698 | bellard | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
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317 | 2f619698 | bellard | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
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318 | 2f619698 | bellard | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
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319 | 2f619698 | bellard | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
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320 | 2f619698 | bellard | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
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321 | 2f619698 | bellard | |
322 | 2f619698 | bellard | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
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323 | 2f619698 | bellard | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
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324 | 2f619698 | bellard | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
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325 | 2f619698 | bellard | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
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326 | 2f619698 | bellard | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
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327 | 2f619698 | bellard | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
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328 | 2f619698 | bellard | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
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329 | 2f619698 | bellard | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
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330 | 2f619698 | bellard | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
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331 | 2f619698 | bellard | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
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332 | 2f619698 | bellard | |
333 | 579a97f7 | bellard | /* copy_from_user() and copy_to_user() are usually used to copy data
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334 | 579a97f7 | bellard | * buffers between the target and host. These internally perform
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335 | 579a97f7 | bellard | * locking/unlocking of the memory.
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336 | 579a97f7 | bellard | */
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337 | 579a97f7 | bellard | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
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338 | 579a97f7 | bellard | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
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339 | 579a97f7 | bellard | |
340 | 53a5960a | pbrook | /* Functions for accessing guest memory. The tget and tput functions
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341 | 53a5960a | pbrook | read/write single values, byteswapping as neccessary. The lock_user
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342 | 53a5960a | pbrook | gets a pointer to a contiguous area of guest memory, but does not perform
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343 | 53a5960a | pbrook | and byteswapping. lock_user may return either a pointer to the guest
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344 | 53a5960a | pbrook | memory, or a temporary buffer. */
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345 | 53a5960a | pbrook | |
346 | 53a5960a | pbrook | /* Lock an area of guest memory into the host. If copy is true then the
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347 | 53a5960a | pbrook | host area will have the same contents as the guest. */
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348 | 579a97f7 | bellard | static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) |
349 | edf779ff | bellard | { |
350 | 579a97f7 | bellard | if (!access_ok(type, guest_addr, len))
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351 | 579a97f7 | bellard | return NULL; |
352 | 53a5960a | pbrook | #ifdef DEBUG_REMAP
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353 | 579a97f7 | bellard | { |
354 | 579a97f7 | bellard | void *addr;
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355 | 579a97f7 | bellard | addr = malloc(len); |
356 | 579a97f7 | bellard | if (copy)
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357 | 579a97f7 | bellard | memcpy(addr, g2h(guest_addr), len); |
358 | 579a97f7 | bellard | else
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359 | 579a97f7 | bellard | memset(addr, 0, len);
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360 | 579a97f7 | bellard | return addr;
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361 | 579a97f7 | bellard | } |
362 | 53a5960a | pbrook | #else
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363 | 53a5960a | pbrook | return g2h(guest_addr);
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364 | 53a5960a | pbrook | #endif
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365 | edf779ff | bellard | } |
366 | edf779ff | bellard | |
367 | 579a97f7 | bellard | /* Unlock an area of guest memory. The first LEN bytes must be
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368 | 579a97f7 | bellard | flushed back to guest memory. host_ptr = NULL is explicitely
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369 | 579a97f7 | bellard | allowed and does nothing. */
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370 | 579a97f7 | bellard | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
371 | 992f48a0 | blueswir1 | long len)
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372 | edf779ff | bellard | { |
373 | 579a97f7 | bellard | |
374 | 53a5960a | pbrook | #ifdef DEBUG_REMAP
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375 | 579a97f7 | bellard | if (!host_ptr)
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376 | 579a97f7 | bellard | return;
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377 | 579a97f7 | bellard | if (host_ptr == g2h(guest_addr))
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378 | 53a5960a | pbrook | return;
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379 | 53a5960a | pbrook | if (len > 0) |
380 | 06177d36 | balrog | memcpy(g2h(guest_addr), host_ptr, len); |
381 | 579a97f7 | bellard | free(host_ptr); |
382 | 53a5960a | pbrook | #endif
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383 | edf779ff | bellard | } |
384 | edf779ff | bellard | |
385 | 579a97f7 | bellard | /* Return the length of a string in target memory or -TARGET_EFAULT if
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386 | 579a97f7 | bellard | access error. */
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387 | 579a97f7 | bellard | abi_long target_strlen(abi_ulong gaddr); |
388 | 53a5960a | pbrook | |
389 | 53a5960a | pbrook | /* Like lock_user but for null terminated strings. */
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390 | 992f48a0 | blueswir1 | static inline void *lock_user_string(abi_ulong guest_addr) |
391 | 53a5960a | pbrook | { |
392 | 579a97f7 | bellard | abi_long len; |
393 | 579a97f7 | bellard | len = target_strlen(guest_addr); |
394 | 579a97f7 | bellard | if (len < 0) |
395 | 579a97f7 | bellard | return NULL; |
396 | 579a97f7 | bellard | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
397 | edf779ff | bellard | } |
398 | edf779ff | bellard | |
399 | 53a5960a | pbrook | /* Helper macros for locking/ulocking a target struct. */
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400 | 579a97f7 | bellard | #define lock_user_struct(type, host_ptr, guest_addr, copy) \
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401 | 579a97f7 | bellard | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
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402 | 579a97f7 | bellard | #define unlock_user_struct(host_ptr, guest_addr, copy) \
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403 | 53a5960a | pbrook | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) |
404 | 53a5960a | pbrook | |
405 | e88de099 | bellard | #endif /* QEMU_H */ |