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boot: add a way to indicate overflow in ALIGN_TO()

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This commit is contained in:
Lennart Poettering 2021-09-17 10:48:46 +02:00
parent 3fc0688d42
commit 88657f7575
1 changed files with 13 additions and 10 deletions
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23
src/boot/efi/util.h
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@ -8,8 +8,20 @@
#define OFFSETOF(x,y) __builtin_offsetof(x,y)
#define UINTN_MAX (~(UINTN)0)
#define INTN_MAX ((INTN)(UINTN_MAX>>1))
#ifndef UINT32_MAX
#define UINT32_MAX ((UINT32) -1)
#endif
#ifndef UINT64_MAX
#define UINT64_MAX ((UINT64) -1)
#endif
static inline UINTN ALIGN_TO(UINTN l, UINTN ali) {
return ((l + ali - 1) & ~(ali - 1));
if (l > UINTN_MAX - (ali - 1)) /* Overflow? */
return UINTN_MAX;
return ((l + (ali - 1)) & ~(ali - 1));
}
EFI_STATUS parse_boolean(const CHAR8 *v, BOOLEAN *b);
@ -65,15 +77,6 @@ static inline void FileHandleClosep(EFI_FILE_HANDLE *handle) {
&(const EFI_GUID) { 0x4a67b082, 0x0a4c, 0x41cf, { 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f } }
#define EFI_GLOBAL_GUID &(const EFI_GUID) EFI_GLOBAL_VARIABLE
#define UINTN_MAX (~(UINTN)0)
#define INTN_MAX ((INTN)(UINTN_MAX>>1))
#ifndef UINT32_MAX
#define UINT32_MAX ((UINT32) -1)
#endif
#ifndef UINT64_MAX
#define UINT64_MAX ((UINT64) -1)
#endif
VOID log_error_stall(const CHAR16 *fmt, ...);
EFI_STATUS log_oom(void);