X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=include%2Fust%2Fprocessor.h;h=987f75e6cee329b2baba95fb623bc9c8efe302a7;hb=cacb7fbe9c619d776254b469c8f807e8695d4a95;hp=ea75be05fff01fef3fd5dd7c702dc938fad979ba;hpb=a5850bc4ccd4fab794c76a368648e21236d7db01;p=ust.git

diff --git a/include/ust/processor.h b/include/ust/processor.h
index ea75be0..987f75e 100644
--- a/include/ust/processor.h
+++ b/include/ust/processor.h
@@ -7,37 +7,130 @@
 extern __thread long ust_reg_stack[500];
 extern volatile __thread long *ust_reg_stack_ptr;
 
-
-#ifdef X86_32
+#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 ecx;
 	long edi;
-	int  xds;
-	int  xes;
-	int  xfs;
-	int  xgs;
-	long eip;
-	int  xcs;
+	long ebx;
+	long eax;
 	long eflags;
-	int  xss;
+	long esp;
 };
 
-static inline save_registers(struct registers *regs)
-{
-}
+#ifdef CONFIG_UST_GDB_INTEGRATION
+
+//#error "GDB integration not supported for x86-32 yet."
+
+#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 will be used to temporarily hold the stack bottom addr */ \
+	     "pushl %%ebx\n\t" \
+	     /* rdi is the input to __tls_get_addr, and also a temp var */ \
+	     "pushl %%edi\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 */ \
+	     /* check if ust_reg_stack_ptr has been initialized */ \
+	     "movl (%%eax),%%ebx\n\t" \
+	     "testl %%ebx,%%ebx\n\t" \
+	     "jne 1f\n\t" \
+	     "movl %%eax,%%ebx\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 */ \
+	     "addl $500,%%eax\n\t" \
+	     "movl %%eax,(%%ebx)\n\t" \
+	     "movl %%ebx,%%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 16(%%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 12(%%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 8(%%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 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 -- */ \
+	     /* -- edi already pushed -- */ \
+	     "addl $-4,(%%eax)\n\t" \
+	     "movl (%%eax), %%ebx\n\t" \
+	     "movl %%ecx,(%%ebx)\n\t" \
+	     "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 %%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_INTEGRATION */
+
+#define save_registers(a)
+
+#endif /* CONFIG_UST_GDB_INTEGRATION */
 
 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__
 
 #define _ASM_PTR ".long "
 
-#else
+#else /* below is code for x86-64 */
 
 struct registers {
 	int padding; /* 4 bytes */
@@ -62,6 +155,8 @@ struct registers {
 	unsigned long rsp;
 };
 
+#ifdef CONFIG_UST_GDB_INTEGRATION
+
 #define save_registers(regsptr) \
 	asm volatile ( \
 	     /* save original rsp */ \
@@ -187,6 +282,12 @@ struct registers {
 	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_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. */
 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip)