From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Mon, 19 Apr 2010 22:35:44 +0000 (-0400)
Subject: Port to PowerPC 32
X-Git-Tag: v0.5~34
X-Git-Url: http://git.lttng.org/?p=ust.git;a=commitdiff_plain;h=6fa0d97f663351869797d35ddb504489e223fa7c

Port to PowerPC 32
---

diff --git a/configure.ac b/configure.ac
index 689f891..0904c26 100644
--- a/configure.ac
+++ b/configure.ac
@@ -94,11 +94,11 @@ changequote([,])dnl
 	  fi
 	  ;;
 	x86_64) LIBFORMAT="elf64-x86-64" ;;
-	ppc) LIBFORMAT="elf32-powerpc" ;;
+	powerpc) LIBFORMAT="elf32-powerpc" ;;
 	ppc64) LIBFORMAT="elf64-powerpc" ;;
 	s390) LIBFORMAT="elf32-s390" ;;
 	s390x) LIBFORMAT="elf64-s390" ;;
-	*) AC_MSG_ERROR([unable to detect library format (unsupported architecture?)]) ;;
+	*) AC_MSG_ERROR([unable to detect library format (unsupported architecture ($host_cpu)?)]) ;;
 esac
 AC_SUBST(LIBFORMAT)
 AC_MSG_RESULT($LIBFORMAT)
diff --git a/include/ust/kernelcompat.h b/include/ust/kernelcompat.h
index e6885f7..1b9058d 100644
--- a/include/ust/kernelcompat.h
+++ b/include/ust/kernelcompat.h
@@ -87,6 +87,7 @@ static inline long IS_ERR(const void *ptr)
 
 /* MATH */
 
+#include <ust/processor.h>
 static inline unsigned int hweight32(unsigned int w)
 {
 	unsigned int res = w - ((w >> 1) & 0x55555555);
@@ -96,22 +97,6 @@ static inline unsigned int hweight32(unsigned int w)
 	return (res + (res >> 16)) & 0x000000FF;
 }
 
-static inline int fls(int x)
-{
-        int r;
-//ust// #ifdef CONFIG_X86_CMOV
-        asm("bsrl %1,%0\n\t"
-            "cmovzl %2,%0"
-            : "=&r" (r) : "rm" (x), "rm" (-1));
-//ust// #else
-//ust//         asm("bsrl %1,%0\n\t"
-//ust//             "jnz 1f\n\t"
-//ust//             "movl $-1,%0\n"
-//ust//             "1:" : "=r" (r) : "rm" (x));
-//ust// #endif
-        return r + 1;
-}
-
 static __inline__ int get_count_order(unsigned int count)
 {
 	int order;
diff --git a/include/ust/marker.h b/include/ust/marker.h
index bd1ef69..5590098 100644
--- a/include/ust/marker.h
+++ b/include/ust/marker.h
@@ -112,7 +112,7 @@ struct marker {
 		);										\
 		asm volatile (									\
 		     ".section __markers,\"aw\",@progbits\n\t"					\
-		     ".align 8\n\t"								\
+		     ".balign 8\n\t" 								\
 		     "2:\n\t" \
 		     _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ")\n\t" /* channel string */ \
 		     _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ")\n\t" /* name string */ \
@@ -121,7 +121,7 @@ struct marker {
 		     ".byte 0\n\t" /* ptype */							\
 		     ".word 0\n\t" /* channel_id */						\
 		     ".word 0\n\t" /* event_id */						\
-		     ".align " XSTR(__WORDSIZE) " / 8\n\t" /* alignment */			\
+		     ".balign " XSTR(__WORDSIZE) " / 8\n\t" /* alignment */			\
 		     _ASM_PTR "(marker_probe_cb)\n\t" /* call */				\
 		     _ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \
 		     _ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */			\
@@ -130,8 +130,8 @@ struct marker {
 		     _ASM_PTR "0\n\t" /* tp_cb */						\
 		     _ASM_PTR "(1f)\n\t" /* location */						\
 		     ".previous\n\t"								\
+		     ARCH_COPY_ADDR("%[outptr]")						\
 		     "1:\n\t"									\
-		     ARCH_COPY_ADDR("2b", "%[outptr]") "\n\t"					\
 		: [outptr] "=r" (m) );								\
 												\
 		save_registers(&regs)
diff --git a/include/ust/processor.h b/include/ust/processor.h
index db39ee8..867b140 100644
--- a/include/ust/processor.h
+++ b/include/ust/processor.h
@@ -24,7 +24,7 @@
 extern __thread long ust_reg_stack[500];
 extern volatile __thread long *ust_reg_stack_ptr;
 
-#ifndef __x86_64
+#ifdef __i386
 
 struct registers {
 	short ss;
@@ -40,6 +40,15 @@ struct registers {
 	long esp;
 };
 
+static inline int fls(int x)
+{
+        int r;
+        asm("bsrl %1,%0\n\t"
+            "cmovzl %2,%0"
+            : "=&r" (r) : "rm" (x), "rm" (-1));
+        return r + 1;
+}
+
 #ifdef CONFIG_UST_GDB_INTEGRATION
 
 /* save_registers - saves most of the processor's registers so
@@ -198,11 +207,13 @@ struct registers {
 
 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__
 
-#define ARCH_COPY_ADDR(src, dst) "lea " src "," dst
+#define ARCH_COPY_ADDR(dst) "lea 2b," dst "\n\t"
 
 #define _ASM_PTR ".long "
 
-#else /* below is code for x86-64 */
+#endif /* below is code for x86-64 */
+
+#ifdef __x86_64
 
 struct registers {
 	int padding; /* 4 bytes */
@@ -227,6 +238,15 @@ struct registers {
 	unsigned long rsp;
 };
 
+static inline int fls(int x)
+{
+        int r;
+        asm("bsrl %1,%0\n\t"
+            "cmovzl %2,%0"
+            : "=&r" (r) : "rm" (x), "rm" (-1));
+        return r + 1;
+}
+
 #ifdef CONFIG_UST_GDB_INTEGRATION
 
 #define save_registers(regsptr) \
@@ -398,10 +418,32 @@ struct registers {
  * in a relocatable way. On x86-64, this uses a special (%rip) notation. */
 #define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip)
 
-#define ARCH_COPY_ADDR(src, dst) "lea " src "(%%rip)," dst
+#define ARCH_COPY_ADDR(dst) "lea 2b(%%rip)," dst "\n\t"
 
 #define _ASM_PTR ".quad "
 
-#endif
+#endif /* x86_64 */
+
+#ifdef __PPC__
+
+struct registers {
+};
+
+static __inline__ int fls(unsigned int x)
+{
+        int lz;
+
+        asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x));
+        return 32 - lz;
+}
+
+#define ARCH_COPY_ADDR(dst) \
+		     "lis " dst ",2b@h\n\t" /* load high bytes */ \
+		     "ori " dst "," dst ",2b@l\n\t" /* load low bytes */
+
+#define _ASM_PTR ".long "
+#define save_registers(a)
+
+#endif /* __PPC__ */
 
 #endif /* UST_PROCESSOR_H */