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Fix to pre-allocate 32bytes in stack to Load X64 Image. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1929 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4 2006-11-10 09:01:25 +00:00
parent 0401b900ad
commit 9723bdde15
1 changed files with 7 additions and 3 deletions
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10
EdkModulePkg/Core/DxeIplX64Peim/DxeLoadX64.c
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@ -260,10 +260,14 @@ Returns:
//
// Compute the top of the stack we were allocated. Pre-allocate a 32 bytes
// for safety (PpisNeededByDxe and DxeCore).
// for x64 calling convention.
//
TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;
TopOfStack = (EFI_PHYSICAL_ADDRESS) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
// The first four parameters to a function are passed in rcx, rdx, r8 and r9.
// Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the
// register parameters is reserved on the stack, in case the called function
// wants to spill them; this is important if the function is variadic.
//
TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;
//
// Add architecture-specifc HOBs (including the BspStore HOB)