Changes in kernel/arch/amd64/src/context.S [4bf0926e:0aee9b4] in mainline

File:

• kernel/arch/amd64/src/context.S (modified) (5 diffs)

kernel/arch/amd64/src/context.S

@@ -27 +27 @@
 #
 
-#include <abi/asmtool.h>
+.text
+
+.global context_save_arch
+.global context_restore_arch
+
 #include <arch/context_struct.h>
-#include <arch/vreg.h>
-
-.text
 
 ## Save current CPU context
@@ -38 +39 @@
 # pointed by the 1st argument. Returns 1 in EAX.
 #
-FUNCTION_BEGIN(context_save_arch)
-        movq (%rsp), %rdx     # the caller's return %rip
+context_save_arch:
+        movq (%rsp), %rdx     # the caller's return %eip
         
+        # 1st argument passed in %edi
         movq %rdx, CONTEXT_OFFSET_PC(%rdi)
         movq %rsp, CONTEXT_OFFSET_SP(%rdi)
@@ -51 +53 @@
         movq %r15, CONTEXT_OFFSET_R15(%rdi)
         
-#ifdef MEMORY_MODEL_large
-        movabsq $vreg_ptr, %rsi
-        movq (%rsi), %rsi
-#else
-        movq vreg_ptr, %rsi
-#endif
-        movq %fs:VREG_TP(%rsi), %rsi
-        movq %rsi, CONTEXT_OFFSET_TP(%rdi)
-        
         xorl %eax, %eax       # context_save returns 1
         incl %eax
         ret
-FUNCTION_END(context_save_arch)
 
 
@@ -71 +63 @@
 # pointed by the 1st argument. Returns 0 in EAX.
 #
-FUNCTION_BEGIN(context_restore_arch)
+context_restore_arch:
         movq CONTEXT_OFFSET_R15(%rdi), %r15
         movq CONTEXT_OFFSET_R14(%rdi), %r14
@@ -79 +71 @@
         movq CONTEXT_OFFSET_RBX(%rdi), %rbx
         
-        movq CONTEXT_OFFSET_SP(%rdi), %rsp
+        movq CONTEXT_OFFSET_SP(%rdi), %rsp   # ctx->sp -> %rsp
         
-        movq CONTEXT_OFFSET_PC(%rdi), %rdx
+        movq CONTEXT_OFFSET_PC(%rdi), %rdx 
+        
         movq %rdx, (%rsp)
-        
-        movq CONTEXT_OFFSET_TP(%rdi), %rcx
-#ifdef MEMORY_MODEL_large
-        movabsq $vreg_ptr, %rsi
-        movq (%rsi), %rsi
-#else
-        movq vreg_ptr, %rsi
-#endif
-        movq %rcx, %fs:VREG_TP(%rsi)
         
         xorl %eax, %eax       # context_restore returns 0
         ret
-FUNCTION_END(context_restore_arch)