| 1 | #ifndef UST_PROCESSOR_H |
| 2 | #define UST_PROCESSOR_H |
| 3 | |
| 4 | #include <stddef.h> |
| 5 | #include <string.h> |
| 6 | |
| 7 | extern __thread long ust_reg_stack[500]; |
| 8 | extern volatile __thread long *ust_reg_stack_ptr; |
| 9 | |
| 10 | #ifndef __x86_64 |
| 11 | |
| 12 | struct registers { |
| 13 | short ss; |
| 14 | short cs; |
| 15 | long esi; |
| 16 | long ebp; |
| 17 | long edx; |
| 18 | long ecx; |
| 19 | long edi; |
| 20 | long ebx; |
| 21 | long eax; |
| 22 | long eflags; |
| 23 | long esp; |
| 24 | }; |
| 25 | |
| 26 | #ifdef CONFIG_UST_GDB_INTEGRATION |
| 27 | |
| 28 | //#error "GDB integration not supported for x86-32 yet." |
| 29 | |
| 30 | #define save_registers(regsptr) \ |
| 31 | asm volatile ( \ |
| 32 | /* save original esp */ \ |
| 33 | "pushl %%esp\n\t" \ |
| 34 | /* push original eflags */ \ |
| 35 | "pushfl\n\t" \ |
| 36 | /* eax will hold the ptr to the private stack bottom */ \ |
| 37 | "pushl %%eax\n\t" \ |
| 38 | /* ebx will be used to temporarily hold the stack bottom addr */ \ |
| 39 | "pushl %%ebx\n\t" \ |
| 40 | /* rdi is the input to __tls_get_addr, and also a temp var */ \ |
| 41 | "pushl %%edi\n\t" \ |
| 42 | /* Start TLS access of private reg stack pointer */ \ |
| 43 | "leal ust_reg_stack_ptr@tlsgd(,%%ebx,1),%%eax\n\t" \ |
| 44 | "call ___tls_get_addr@plt\n\t" \ |
| 45 | /* --- End TLS access */ \ |
| 46 | /* check if ust_reg_stack_ptr has been initialized */ \ |
| 47 | "movl (%%eax),%%ebx\n\t" \ |
| 48 | "testl %%ebx,%%ebx\n\t" \ |
| 49 | "jne 1f\n\t" \ |
| 50 | "movl %%eax,%%ebx\n\t" \ |
| 51 | /* Start TLS access of private reg stack */ \ |
| 52 | "leal ust_reg_stack@tlsgd(,%%ebx,1),%%eax\n\t" \ |
| 53 | "call ___tls_get_addr@plt\n\t" \ |
| 54 | /* --- End TLS access */ \ |
| 55 | "addl $500,%%eax\n\t" \ |
| 56 | "movl %%eax,(%%ebx)\n\t" \ |
| 57 | "movl %%ebx,%%eax\n\t" \ |
| 58 | /* now the pointer to the private stack is in eax. \ |
| 59 | must add stack size so the ptr points to the stack bottom. */ \ |
| 60 | "1:\n\t" \ |
| 61 | /* Manually push esp to private stack */ \ |
| 62 | "addl $-4,(%%eax)\n\t" \ |
| 63 | "movl 16(%%esp), %%edi\n\t" \ |
| 64 | "movl (%%eax), %%ebx\n\t" \ |
| 65 | "movl %%edi, (%%ebx)\n\t" \ |
| 66 | /* Manually push eflags to private stack */ \ |
| 67 | "addl $-4,(%%eax)\n\t" \ |
| 68 | "movl 12(%%esp), %%edi\n\t" \ |
| 69 | "movl (%%eax), %%ebx\n\t" \ |
| 70 | "movl %%edi, (%%ebx)\n\t" \ |
| 71 | /* Manually push eax to private stack */ \ |
| 72 | "addl $-4,(%%eax)\n\t" \ |
| 73 | "movl 8(%%esp), %%edi\n\t" \ |
| 74 | "movl (%%eax), %%ebx\n\t" \ |
| 75 | "movl %%edi, (%%ebx)\n\t" \ |
| 76 | /* Manually push ebx to private stack */ \ |
| 77 | "addl $-4,(%%eax)\n\t" \ |
| 78 | "movl 4(%%esp), %%edi\n\t" \ |
| 79 | "movl (%%eax), %%ebx\n\t" \ |
| 80 | "movl %%edi, (%%ebx)\n\t" \ |
| 81 | /* Manually push edi to private stack */ \ |
| 82 | "addl $-4,(%%eax)\n\t" \ |
| 83 | "movl 0(%%esp), %%edi\n\t" \ |
| 84 | "movl (%%eax), %%ebx\n\t" \ |
| 85 | "movl %%edi, (%%ebx)\n\t" \ |
| 86 | /* now push regs to tls */ \ |
| 87 | /* -- esp already pushed -- */ \ |
| 88 | /* -- eax already pushed -- */ \ |
| 89 | /* -- ebx already pushed -- */ \ |
| 90 | /* -- edi already pushed -- */ \ |
| 91 | "addl $-4,(%%eax)\n\t" \ |
| 92 | "movl (%%eax), %%ebx\n\t" \ |
| 93 | "movl %%ecx,(%%ebx)\n\t" \ |
| 94 | "addl $-4,(%%eax)\n\t" \ |
| 95 | "movl (%%eax), %%ebx\n\t" \ |
| 96 | "movl %%edx,(%%ebx)\n\t" \ |
| 97 | "addl $-4,(%%eax)\n\t" \ |
| 98 | "movl (%%eax), %%ebx\n\t" \ |
| 99 | "movl %%ebp,(%%ebx)\n\t" \ |
| 100 | "addl $-4,(%%eax)\n\t" \ |
| 101 | "movl (%%eax), %%ebx\n\t" \ |
| 102 | "movl %%esi,(%%ebx)\n\t" \ |
| 103 | /* push cs */ \ |
| 104 | "addl $-2,(%%eax)\n\t" \ |
| 105 | "movl (%%eax), %%ebx\n\t" \ |
| 106 | "movw %%cs, (%%ebx)\n\t" \ |
| 107 | /* push ss */ \ |
| 108 | "addl $-2,(%%eax)\n\t" \ |
| 109 | "movl (%%eax), %%ebx\n\t" \ |
| 110 | "movw %%ss, (%%ebx)\n\t" \ |
| 111 | /* restore original values of regs that were used internally */ \ |
| 112 | "popl %%edi\n\t" \ |
| 113 | "popl %%ebx\n\t" \ |
| 114 | "popl %%eax\n\t" \ |
| 115 | /* cancel push of rsp */ \ |
| 116 | "addl $4,%%esp\n\t" \ |
| 117 | /* cancel push of eflags */ \ |
| 118 | "addl $4,%%esp\n\t" \ |
| 119 | ::: "memory"); \ |
| 120 | memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \ |
| 121 | ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers)); |
| 122 | |
| 123 | #define save_ip(channel,name) |
| 124 | |
| 125 | |
| 126 | #else /* CONFIG_UST_GDB_INTEGRATION */ |
| 127 | |
| 128 | #define save_ip(channel,name) |
| 129 | #define save_registers(a) |
| 130 | |
| 131 | #endif /* CONFIG_UST_GDB_INTEGRATION */ |
| 132 | |
| 133 | #define RELATIVE_ADDRESS(__rel_label__) __rel_label__ |
| 134 | |
| 135 | #define _ASM_PTR ".long " |
| 136 | |
| 137 | #else /* below is code for x86-64 */ |
| 138 | |
| 139 | struct registers { |
| 140 | int padding; /* 4 bytes */ |
| 141 | short ss; |
| 142 | short cs; |
| 143 | unsigned long r15; |
| 144 | unsigned long r14; |
| 145 | unsigned long r13; |
| 146 | unsigned long r12; |
| 147 | unsigned long r11; |
| 148 | unsigned long r10; |
| 149 | unsigned long r9; |
| 150 | unsigned long r8; |
| 151 | unsigned long rsi; |
| 152 | unsigned long rbp; |
| 153 | unsigned long rdx; |
| 154 | unsigned long rcx; |
| 155 | unsigned long rdi; |
| 156 | unsigned long rbx; |
| 157 | unsigned long rax; |
| 158 | unsigned long rflags; |
| 159 | unsigned long rsp; |
| 160 | }; |
| 161 | |
| 162 | #ifdef CONFIG_UST_GDB_INTEGRATION |
| 163 | #define save_ip(channel,name) \ |
| 164 | asm (".section __marker_addr,\"aw\",@progbits\n\t" \ |
| 165 | _ASM_PTR "%c[marker_struct], (1f)\n\t" \ |
| 166 | ".previous\n\t" \ |
| 167 | "1:\n\t" \ |
| 168 | :: [marker_struct] "i" (&__mark_##channel##_##name));\ |
| 169 | |
| 170 | #define save_registers(regsptr) \ |
| 171 | asm volatile ( \ |
| 172 | /* save original rsp */ \ |
| 173 | "pushq %%rsp\n\t" \ |
| 174 | /* push original rflags */ \ |
| 175 | "pushfq\n\t" \ |
| 176 | /* rax will hold the ptr to the private stack bottom */ \ |
| 177 | "pushq %%rax\n\t" \ |
| 178 | /* rbx will be used to temporarily hold the stack bottom addr */ \ |
| 179 | "pushq %%rbx\n\t" \ |
| 180 | /* rdi is the input to __tls_get_addr, and also a temp var */ \ |
| 181 | "pushq %%rdi\n\t" \ |
| 182 | /* Start TLS access of private reg stack pointer */ \ |
| 183 | ".byte 0x66\n\t" \ |
| 184 | "leaq ust_reg_stack_ptr@tlsgd(%%rip), %%rdi\n\t" \ |
| 185 | ".word 0x6666\n\t" \ |
| 186 | "rex64\n\t" \ |
| 187 | "call __tls_get_addr@plt\n\t" \ |
| 188 | /* --- End TLS access */ \ |
| 189 | /* check if ust_reg_stack_ptr has been initialized */ \ |
| 190 | "movq (%%rax),%%rbx\n\t" \ |
| 191 | "testq %%rbx,%%rbx\n\t" \ |
| 192 | "jne 1f\n\t" \ |
| 193 | "movq %%rax,%%rbx\n\t" \ |
| 194 | /* Start TLS access of private reg stack */ \ |
| 195 | ".byte 0x66\n\t" \ |
| 196 | "leaq ust_reg_stack@tlsgd(%%rip), %%rdi\n\t" \ |
| 197 | ".word 0x6666\n\t" \ |
| 198 | "rex64\n\t" \ |
| 199 | "call __tls_get_addr@plt\n\t" \ |
| 200 | /* --- End TLS access */ \ |
| 201 | "addq $500,%%rax\n\t" \ |
| 202 | "movq %%rax,(%%rbx)\n\t" \ |
| 203 | "movq %%rbx,%%rax\n\t" \ |
| 204 | /* now the pointer to the private stack is in rax. |
| 205 | must add stack size so the ptr points to the stack bottom. */ \ |
| 206 | "1:\n\t" \ |
| 207 | /* Manually push rsp to private stack */ \ |
| 208 | "addq $-8,(%%rax)\n\t" \ |
| 209 | "movq 32(%%rsp), %%rdi\n\t" \ |
| 210 | "movq (%%rax), %%rbx\n\t" \ |
| 211 | "movq %%rdi, (%%rbx)\n\t" \ |
| 212 | /* Manually push eflags to private stack */ \ |
| 213 | "addq $-8,(%%rax)\n\t" \ |
| 214 | "movq 24(%%rsp), %%rdi\n\t" \ |
| 215 | "movq (%%rax), %%rbx\n\t" \ |
| 216 | "movq %%rdi, (%%rbx)\n\t" \ |
| 217 | /* Manually push rax to private stack */ \ |
| 218 | "addq $-8,(%%rax)\n\t" \ |
| 219 | "movq 16(%%rsp), %%rdi\n\t" \ |
| 220 | "movq (%%rax), %%rbx\n\t" \ |
| 221 | "movq %%rdi, (%%rbx)\n\t" \ |
| 222 | /* Manually push rbx to private stack */ \ |
| 223 | "addq $-8,(%%rax)\n\t" \ |
| 224 | "movq 8(%%rsp), %%rdi\n\t" \ |
| 225 | "movq (%%rax), %%rbx\n\t" \ |
| 226 | "movq %%rdi, (%%rbx)\n\t" \ |
| 227 | /* Manually push rdi to private stack */ \ |
| 228 | "addq $-8,(%%rax)\n\t" \ |
| 229 | "movq 0(%%rsp), %%rdi\n\t" \ |
| 230 | "movq (%%rax), %%rbx\n\t" \ |
| 231 | "movq %%rdi, (%%rbx)\n\t" \ |
| 232 | /* now push regs to tls */ \ |
| 233 | /* -- rsp already pushed -- */ \ |
| 234 | /* -- rax already pushed -- */ \ |
| 235 | /* -- rbx already pushed -- */ \ |
| 236 | /* -- rdi already pushed -- */ \ |
| 237 | "addq $-8,(%%rax)\n\t" \ |
| 238 | "movq (%%rax), %%rbx\n\t" \ |
| 239 | "movq %%rcx,(%%rbx)\n\t" \ |
| 240 | "addq $-8,(%%rax)\n\t" \ |
| 241 | "movq (%%rax), %%rbx\n\t" \ |
| 242 | "movq %%rdx,(%%rbx)\n\t" \ |
| 243 | "addq $-8,(%%rax)\n\t" \ |
| 244 | "movq (%%rax), %%rbx\n\t" \ |
| 245 | "movq %%rbp,(%%rbx)\n\t" \ |
| 246 | "addq $-8,(%%rax)\n\t" \ |
| 247 | "movq (%%rax), %%rbx\n\t" \ |
| 248 | "movq %%rsi,(%%rbx)\n\t" \ |
| 249 | "addq $-8,(%%rax)\n\t" \ |
| 250 | "movq (%%rax), %%rbx\n\t" \ |
| 251 | "movq %%r8,(%%rbx)\n\t" \ |
| 252 | "addq $-8,(%%rax)\n\t" \ |
| 253 | "movq (%%rax), %%rbx\n\t" \ |
| 254 | "movq %%r9,(%%rbx)\n\t" \ |
| 255 | "addq $-8,(%%rax)\n\t" \ |
| 256 | "movq (%%rax), %%rbx\n\t" \ |
| 257 | "movq %%r10,(%%rbx)\n\t" \ |
| 258 | "addq $-8,(%%rax)\n\t" \ |
| 259 | "movq (%%rax), %%rbx\n\t" \ |
| 260 | "movq %%r11,(%%rbx)\n\t" \ |
| 261 | "addq $-8,(%%rax)\n\t" \ |
| 262 | "movq (%%rax), %%rbx\n\t" \ |
| 263 | "movq %%r12,(%%rbx)\n\t" \ |
| 264 | "addq $-8,(%%rax)\n\t" \ |
| 265 | "movq (%%rax), %%rbx\n\t" \ |
| 266 | "movq %%r13,(%%rbx)\n\t" \ |
| 267 | "addq $-8,(%%rax)\n\t" \ |
| 268 | "movq (%%rax), %%rbx\n\t" \ |
| 269 | "movq %%r14,(%%rbx)\n\t" \ |
| 270 | "addq $-8,(%%rax)\n\t" \ |
| 271 | "movq (%%rax), %%rbx\n\t" \ |
| 272 | "movq %%r15,(%%rbx)\n\t" \ |
| 273 | /* push cs */ \ |
| 274 | "addq $-2,(%%rax)\n\t" \ |
| 275 | "movq (%%rax), %%rbx\n\t" \ |
| 276 | "movw %%cs, (%%rbx)\n\t" \ |
| 277 | /* push ss */ \ |
| 278 | "addq $-2,(%%rax)\n\t" \ |
| 279 | "movq (%%rax), %%rbx\n\t" \ |
| 280 | "movw %%ss, (%%rbx)\n\t" \ |
| 281 | /* add padding for struct registers */ \ |
| 282 | "addq $-4,(%%rax)\n\t" \ |
| 283 | /* restore original values of regs that were used internally */ \ |
| 284 | "popq %%rdi\n\t" \ |
| 285 | "popq %%rbx\n\t" \ |
| 286 | "popq %%rax\n\t" \ |
| 287 | /* cancel push of rsp */ \ |
| 288 | "addq $8,%%rsp\n\t" \ |
| 289 | /* cancel push of rflags */ \ |
| 290 | "addq $8,%%rsp\n\t" \ |
| 291 | ::); \ |
| 292 | memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \ |
| 293 | ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers)); |
| 294 | |
| 295 | #else /* CONFIG_UST_GDB_INTEGRATION */ |
| 296 | |
| 297 | #define save_ip(channel,name) |
| 298 | #define save_registers(a) |
| 299 | |
| 300 | #endif /* CONFIG_UST_GDB_INTEGRATION */ |
| 301 | |
| 302 | /* Macro to insert the address of a relative jump in an assembly stub, |
| 303 | * in a relocatable way. On x86-64, this uses a special (%rip) notation. */ |
| 304 | #define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip) |
| 305 | |
| 306 | #define _ASM_PTR ".quad " |
| 307 | |
| 308 | #endif |
| 309 | |
| 310 | #endif /* UST_PROCESSOR_H */ |