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[metal] Fix crash under UEFI when command line string is NULL

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This commit is contained in:
tkchia 2023-05-29 18:01:49 +00:00
parent 1d47cc0d12
commit ddc203b2a9
1 changed files with 4 additions and 1 deletions
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5
libc/runtime/efimain.greg.c
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@ -173,6 +173,7 @@ __msabi EFI_STATUS EfiMain(EFI_HANDLE ImageHandle,
uint64_t Address;
uintptr_t Args, MapKey, DescSize;
uint64_t *pd, *pml4t, *pdt1, *pdt2, *pdpt1, *pdpt2;
const char16_t *CmdLine;
extern char os asm("__hostos");
os = _HOSTMETAL;
@ -213,7 +214,9 @@ __msabi EFI_STATUS EfiMain(EFI_HANDLE ImageHandle,
ArgBlock = (struct EfiArgs *)0x7e000;
SystemTable->BootServices->HandleProtocol(ImageHandle,
&kEfiLoadedImageProtocol, &ImgInfo);
Args = GetDosArgv(ImgInfo->LoadOptions, ArgBlock->ArgBlock,
CmdLine = (const char16_t *)ImgInfo->LoadOptions;
if (!CmdLine || !CmdLine[0]) CmdLine = u"BOOTX64.EFI";
Args = GetDosArgv(CmdLine, ArgBlock->ArgBlock,
sizeof(ArgBlock->ArgBlock), ArgBlock->Args,
ARRAYLEN(ArgBlock->Args));