Changeset da349da0 in mainline for kernel/arch/sparc64/src/asm.S

Timestamp:

2008-08-10T15:28:42Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a9d4d2c

Parents:

d2e9c47

Message:

memcpy(), memmove() and similar functions return dst instead of src.
Fix all implementations, including those in assembly. ppc32 assembly
version didn't seem to be affected by this.

File:

• kernel/arch/sparc64/src/asm.S (modified) (9 diffs)

kernel/arch/sparc64/src/asm.S

@@ -42 +42 @@
 .global memcpy
 memcpy:
+        mov     %o0, %o3                ! save dst
         add     %o1, 7, %g1
         and     %g1, -8, %g1
@@ -60 +61 @@
 2:
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 3:
         and     %g1, -8, %g1
@@ -94 +95 @@
 
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 
 /*
@@ -101 +102 @@
 .global memcpy_from_uspace
 memcpy_from_uspace:
+        mov     %o0, %o3                ! save dst
         add     %o1, 7, %g1
         and     %g1, -8, %g1
@@ -119 +121 @@
 2:
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 3:
         and     %g1, -8, %g1
@@ -153 +155 @@
 
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 
 /*
@@ -160 +162 @@
 .global memcpy_to_uspace
 memcpy_to_uspace:
+        mov     %o0, %o3                ! save dst
         add     %o1, 7, %g1
         and     %g1, -8, %g1
@@ -178 +181 @@
 2:
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 3:
         and     %g1, -8, %g1
@@ -212 +215 @@
 
         jmp     %o7 + 8                 ! exit point
-        mov     %o1, %o0
+        mov     %o3, %o0
 
 .global memcpy_from_uspace_failover_address