include/ust/processor.h

   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 #else /* CONFIG_UST_GDB_INTEGRATION */
 124
 125 #define save_registers(a)
 126
 127 #endif /* CONFIG_UST_GDB_INTEGRATION */
 128
 129 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__
 130
 131 #define _ASM_PTR ".long "
 132
 133 #else /* below is code for x86-64 */
 134
 135 struct registers {
 136         int padding; /* 4 bytes */
 137         short ss;
 138         short cs;
 139         unsigned long r15;
 140         unsigned long r14;
 141         unsigned long r13;
 142         unsigned long r12;
 143         unsigned long r11;
 144         unsigned long r10;
 145         unsigned long r9;
 146         unsigned long r8;
 147         unsigned long rsi;
 148         unsigned long rbp;
 149         unsigned long rdx;
 150         unsigned long rcx;
 151         unsigned long rdi;
 152         unsigned long rbx;
 153         unsigned long rax;
 154         unsigned long rflags;
 155         unsigned long rsp;
 156 };
 157
 158 #ifdef CONFIG_UST_GDB_INTEGRATION
 159
 160 #define save_registers(regsptr) \
 161         asm volatile ( \
 162              /* save original rsp */ \
 163              "pushq %%rsp\n\t" \
 164              /* push original rflags */ \
 165              "pushfq\n\t" \
 166               /* rax will hold the ptr to the private stack bottom */ \
 167              "pushq %%rax\n\t" \
 168              /* rbx will be used to temporarily hold the stack bottom addr */ \
 169              "pushq %%rbx\n\t" \
 170              /* rdi is the input to __tls_get_addr, and also a temp var */ \
 171              "pushq %%rdi\n\t" \
 172              /* Start TLS access of private reg stack pointer */ \
 173              ".byte 0x66\n\t" \
 174              "leaq ust_reg_stack_ptr@tlsgd(%%rip), %%rdi\n\t" \
 175              ".word 0x6666\n\t" \
 176              "rex64\n\t" \
 177              "call __tls_get_addr@plt\n\t" \
 178              /* --- End TLS access */ \
 179              /* check if ust_reg_stack_ptr has been initialized */ \
 180              "movq (%%rax),%%rbx\n\t" \
 181              "testq %%rbx,%%rbx\n\t" \
 182              "jne 1f\n\t" \
 183              "movq %%rax,%%rbx\n\t" \
 184              /* Start TLS access of private reg stack */ \
 185              ".byte 0x66\n\t" \
 186              "leaq ust_reg_stack@tlsgd(%%rip), %%rdi\n\t" \
 187              ".word 0x6666\n\t" \
 188              "rex64\n\t" \
 189              "call __tls_get_addr@plt\n\t" \
 190              /* --- End TLS access */ \
 191              "addq $500,%%rax\n\t" \
 192              "movq %%rax,(%%rbx)\n\t" \
 193              "movq %%rbx,%%rax\n\t" \
 194              /* now the pointer to the private stack is in rax.
 195                 must add stack size so the ptr points to the stack bottom. */ \
 196         "1:\n\t" \
 197              /* Manually push rsp to private stack */ \
 198              "addq $-8,(%%rax)\n\t" \
 199              "movq 32(%%rsp), %%rdi\n\t" \
 200              "movq (%%rax), %%rbx\n\t" \
 201              "movq %%rdi, (%%rbx)\n\t" \
 202              /* Manually push eflags to private stack */ \
 203              "addq $-8,(%%rax)\n\t" \
 204              "movq 24(%%rsp), %%rdi\n\t" \
 205              "movq (%%rax), %%rbx\n\t" \
 206              "movq %%rdi, (%%rbx)\n\t" \
 207              /* Manually push rax to private stack */ \
 208              "addq $-8,(%%rax)\n\t" \
 209              "movq 16(%%rsp), %%rdi\n\t" \
 210              "movq (%%rax), %%rbx\n\t" \
 211              "movq %%rdi, (%%rbx)\n\t" \
 212              /* Manually push rbx to private stack */ \
 213              "addq $-8,(%%rax)\n\t" \
 214              "movq 8(%%rsp), %%rdi\n\t" \
 215              "movq (%%rax), %%rbx\n\t" \
 216              "movq %%rdi, (%%rbx)\n\t" \
 217              /* Manually push rdi to private stack */ \
 218              "addq $-8,(%%rax)\n\t" \
 219              "movq 0(%%rsp), %%rdi\n\t" \
 220              "movq (%%rax), %%rbx\n\t" \
 221              "movq %%rdi, (%%rbx)\n\t" \
 222              /* now push regs to tls */ \
 223              /* -- rsp already pushed -- */ \
 224              /* -- rax already pushed -- */ \
 225              /* -- rbx already pushed -- */ \
 226              /* -- rdi already pushed -- */ \
 227              "addq $-8,(%%rax)\n\t" \
 228              "movq (%%rax), %%rbx\n\t" \
 229              "movq %%rcx,(%%rbx)\n\t" \
 230              "addq $-8,(%%rax)\n\t" \
 231              "movq (%%rax), %%rbx\n\t" \
 232              "movq %%rdx,(%%rbx)\n\t" \
 233              "addq $-8,(%%rax)\n\t" \
 234              "movq (%%rax), %%rbx\n\t" \
 235              "movq %%rbp,(%%rbx)\n\t" \
 236              "addq $-8,(%%rax)\n\t" \
 237              "movq (%%rax), %%rbx\n\t" \
 238              "movq %%rsi,(%%rbx)\n\t" \
 239              "addq $-8,(%%rax)\n\t" \
 240              "movq (%%rax), %%rbx\n\t" \
 241              "movq %%r8,(%%rbx)\n\t" \
 242              "addq $-8,(%%rax)\n\t" \
 243              "movq (%%rax), %%rbx\n\t" \
 244              "movq %%r9,(%%rbx)\n\t" \
 245              "addq $-8,(%%rax)\n\t" \
 246              "movq (%%rax), %%rbx\n\t" \
 247              "movq %%r10,(%%rbx)\n\t" \
 248              "addq $-8,(%%rax)\n\t" \
 249              "movq (%%rax), %%rbx\n\t" \
 250              "movq %%r11,(%%rbx)\n\t" \
 251              "addq $-8,(%%rax)\n\t" \
 252              "movq (%%rax), %%rbx\n\t" \
 253              "movq %%r12,(%%rbx)\n\t" \
 254              "addq $-8,(%%rax)\n\t" \
 255              "movq (%%rax), %%rbx\n\t" \
 256              "movq %%r13,(%%rbx)\n\t" \
 257              "addq $-8,(%%rax)\n\t" \
 258              "movq (%%rax), %%rbx\n\t" \
 259              "movq %%r14,(%%rbx)\n\t" \
 260              "addq $-8,(%%rax)\n\t" \
 261              "movq (%%rax), %%rbx\n\t" \
 262              "movq %%r15,(%%rbx)\n\t" \
 263              /* push cs */ \
 264              "addq $-2,(%%rax)\n\t" \
 265              "movq (%%rax), %%rbx\n\t" \
 266              "movw %%cs, (%%rbx)\n\t" \
 267              /* push ss */ \
 268              "addq $-2,(%%rax)\n\t" \
 269              "movq (%%rax), %%rbx\n\t" \
 270              "movw %%ss, (%%rbx)\n\t" \
 271              /* add padding for struct registers */ \
 272              "addq $-4,(%%rax)\n\t" \
 273              /* restore original values of regs that were used internally */ \
 274              "popq %%rdi\n\t" \
 275              "popq %%rbx\n\t" \
 276              "popq %%rax\n\t" \
 277              /* cancel push of rsp */ \
 278              "addq $8,%%rsp\n\t" \
 279              /* cancel push of rflags */ \
 280              "addq $8,%%rsp\n\t" \
 281              ::); \
 282         memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \
 283         ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers));
 284
 285 #else /* CONFIG_UST_GDB_INTEGRATION */
 286
 287 #define save_registers(a)
 288
 289 #endif /* CONFIG_UST_GDB_INTEGRATION */
 290
 291 /* Macro to insert the address of a relative jump in an assembly stub,
 292  * in a relocatable way. On x86-64, this uses a special (%rip) notation. */
 293 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip)
 294
 295 #define _ASM_PTR ".quad "
 296
 297 #endif
 298
 299 #endif /* UST_PROCESSOR_H */