sync comments.

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / SetJump.S

diff --git a/MdePkg/Library/BaseLib/Ia32/SetJump.S b/MdePkg/Library/BaseLib/Ia32/SetJump.S
index acb2b95e2502981bf123e594b2ba03eac7c2339c..dc7f04800360ec7fc4d8fdf8b62f7d75cfc39a5f 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/SetJump.S
+++ b/MdePkg/Library/BaseLib/Ia32/SetJump.S
@@ -30,15 +30,15 @@
 #------------------------------------------------------------------------------\r
 ASM_PFX(SetJump):\r
     pushl   0x4(%esp)\r
 #------------------------------------------------------------------------------\r
 ASM_PFX(SetJump):\r
     pushl   0x4(%esp)\r

-    call    ASM_PFX(InternalAssertJumpBuffer)\r
-    pop     %ecx\r
+    call    ASM_PFX(InternalAssertJumpBuffer)               # To validate JumpBuffer\r

     pop     %ecx\r
     pop     %ecx\r

+    pop     %ecx                                            # ecx <- return address\r

     movl    (%esp), %edx\r
     movl    %ebx, (%edx)\r
     movl    %esi, 4(%edx)\r
     movl    %edi, 8(%edx)\r
     movl    %ebp, 12(%edx)\r
     movl    %esp, 16(%edx)\r
     movl    (%esp), %edx\r
     movl    %ebx, (%edx)\r
     movl    %esi, 4(%edx)\r
     movl    %edi, 8(%edx)\r
     movl    %ebp, 12(%edx)\r
     movl    %esp, 16(%edx)\r

-    movl    %ecx, 20(%edx)\r
+    movl    %ecx, 20(%edx)                                  # eip value to restore in LongJump\r

     xorl    %eax, %eax\r
     jmp     *%ecx\r
     xorl    %eax, %eax\r
     jmp     *%ecx\r