extern __thread long ust_reg_stack[500];
extern volatile __thread long *ust_reg_stack_ptr;
-#ifndef CONFIG_UST_GDB_INTEGRATION
-static inline void save_ip(void)
-{
-}
-#endif
-
-
-#ifndef x86_64
+#ifndef __x86_64
struct registers {
- long eax;
- long ebx;
- long ecx;
- long edx;
- long ebp;
- long esp;
+ short ss;
+ short cs;
long esi;
+ long ebp;
+ long edx;
long edi;
- int xds;
- int xes;
- int xfs;
- int xgs;
- long eip;
- int xcs;
+ long ecx;
+ long ebx;
+ long eax;
long eflags;
- int xss;
+ long esp;
};
-#ifdef CONFIG_UST_GDB_ITEGRATION
+#ifdef CONFIG_UST_GDB_INTEGRATION
-#error "GDB integration not supported for x86-32 yet."
+//#error "GDB integration not supported for x86-32 yet."
-#define save_ip()
-#define save_registers(a)
+#define save_registers(regsptr) \
+ asm volatile ( \
+ /* save original esp */ \
+ "pushl %%esp\n\t" \
+ /* push original eflags */ \
+ "pushfl\n\t" \
+ /* eax will hold the ptr to the private stack bottom */ \
+ "pushl %%eax\n\t" \
+ /* ebx is used for TLS access */ \
+ "pushl %%ebx\n\t" \
+ /* ecx will be used to temporarily hold the stack bottom addr */ \
+ "pushl %%ecx\n\t" \
+ /* rdi is the input to __tls_get_addr, and also a temp var */ \
+ "pushl %%edi\n\t" \
+ /* Get GOT address */ \
+ "call __i686.get_pc_thunk.bx\n\t" \
+ "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \
+ /* Save registers before call (not using ecx yet but we must preserve \
+ the original value of edx. */ \
+ "pushl %%edx\n\t" \
+ /* Start TLS access of private reg stack pointer */ \
+ "leal ust_reg_stack_ptr@tlsgd(,%%ebx,1),%%eax\n\t" \
+ "call ___tls_get_addr@plt\n\t" \
+ /* --- End TLS access */ \
+ "popl %%edx\n\t" \
+ /* check if ust_reg_stack_ptr has been initialized */ \
+ "movl (%%eax),%%ecx\n\t" \
+ "testl %%ecx,%%ecx\n\t" \
+ "jne 1f\n\t" \
+ "movl %%eax,%%ecx\n\t" \
+ /* Save registers before call (using ecx and we must preserve \
+ the original value of edx. */ \
+ "pushl %%ecx\n\t" \
+ "pushl %%edx\n\t" \
+ /* Start TLS access of private reg stack */ \
+ "leal ust_reg_stack@tlsgd(,%%ebx,1),%%eax\n\t" \
+ "call ___tls_get_addr@plt\n\t" \
+ /* --- End TLS access */ \
+ "popl %%edx\n\t" \
+ "popl %%ecx\n\t" \
+ "addl $500,%%eax\n\t" \
+ "movl %%eax,(%%ecx)\n\t" \
+ "movl %%ecx,%%eax\n\t" \
+ /* now the pointer to the private stack is in eax. \
+ must add stack size so the ptr points to the stack bottom. */ \
+ "1:\n\t" \
+ /* Manually push esp to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 20(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* Manually push eflags to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 16(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* Manually push eax to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 12(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* Manually push ebx to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 8(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* Manually push ecx to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 4(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* Manually push edi to private stack */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl 0(%%esp), %%edi\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edi, (%%ebx)\n\t" \
+ /* now push regs to tls */ \
+ /* -- esp already pushed -- */ \
+ /* -- eax already pushed -- */ \
+ /* -- ebx already pushed -- */ \
+ /* -- ecx already pushed -- */ \
+ /* -- edi already pushed -- */ \
+ "addl $-4,(%%eax)\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%edx,(%%ebx)\n\t" \
+ "addl $-4,(%%eax)\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%ebp,(%%ebx)\n\t" \
+ "addl $-4,(%%eax)\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movl %%esi,(%%ebx)\n\t" \
+ /* push cs */ \
+ "addl $-2,(%%eax)\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movw %%cs, (%%ebx)\n\t" \
+ /* push ss */ \
+ "addl $-2,(%%eax)\n\t" \
+ "movl (%%eax), %%ebx\n\t" \
+ "movw %%ss, (%%ebx)\n\t" \
+ /* restore original values of regs that were used internally */ \
+ "popl %%edi\n\t" \
+ "popl %%ecx\n\t" \
+ "popl %%ebx\n\t" \
+ "popl %%eax\n\t" \
+ /* cancel push of rsp */ \
+ "addl $4,%%esp\n\t" \
+ /* cancel push of eflags */ \
+ "addl $4,%%esp\n\t" \
+ ::: "memory"); \
+ memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \
+ ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers));
-#else /* CONFIG_UST_GDB_ITEGRATION */
+#else /* CONFIG_UST_GDB_INTEGRATION */
-#define save_ip()
#define save_registers(a)
-#endif /* CONFIG_UST_GDB_ITEGRATION */
+#endif /* CONFIG_UST_GDB_INTEGRATION */
#define RELATIVE_ADDRESS(__rel_label__) __rel_label__
unsigned long rsp;
};
-#ifdef CONFIG_UST_GDB_ITEGRATION
-#define save_ip() \
- asm (".section __marker_addr,\"aw\",@progbits\n\t" \
- _ASM_PTR "%c[marker_struct], (1f)\n\t" \
- ".previous\n\t" \
- "1:\n\t" \
- :: [marker_struct] "i" (&__mark_##channel##_##name));\
+#ifdef CONFIG_UST_GDB_INTEGRATION
#define save_registers(regsptr) \
asm volatile ( \
memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \
ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers));
-#endif /* CONFIG_UST_GDB_ITEGRATION */
+#else /* CONFIG_UST_GDB_INTEGRATION */
+
+#define save_registers(a)
+
+#endif /* CONFIG_UST_GDB_INTEGRATION */
/* Macro to insert the address of a relative jump in an assembly stub,
* in a relocatable way. On x86-64, this uses a special (%rip) notation. */
projects / ust.git / blobdiff