diff options
Diffstat (limited to 'UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c')
| -rw-r--r-- | UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c | 175 |
1 files changed, 97 insertions, 78 deletions
diff --git a/UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c b/UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c index 780f2d9507..b002c4b9cf 100644 --- a/UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c +++ b/UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c @@ -18,13 +18,13 @@ **/
Elf32_Shdr *
GetElf32SectionByIndex (
- IN UINT8 *ImageBase,
- IN UINT32 Index
+ IN UINT8 *ImageBase,
+ IN UINT32 Index
)
{
- Elf32_Ehdr *Ehdr;
+ Elf32_Ehdr *Ehdr;
- Ehdr = (Elf32_Ehdr *)ImageBase;
+ Ehdr = (Elf32_Ehdr *)ImageBase;
if (Index >= Ehdr->e_shnum) {
return NULL;
}
@@ -42,13 +42,13 @@ GetElf32SectionByIndex ( **/
Elf32_Phdr *
GetElf32SegmentByIndex (
- IN UINT8 *ImageBase,
- IN UINT32 Index
+ IN UINT8 *ImageBase,
+ IN UINT32 Index
)
{
- Elf32_Ehdr *Ehdr;
+ Elf32_Ehdr *Ehdr;
- Ehdr = (Elf32_Ehdr *)ImageBase;
+ Ehdr = (Elf32_Ehdr *)ImageBase;
if (Index >= Ehdr->e_phnum) {
return NULL;
}
@@ -67,24 +67,26 @@ GetElf32SegmentByIndex ( **/
Elf32_Shdr *
GetElf32SectionByRange (
- IN UINT8 *ImageBase,
- IN UINT32 Offset,
- IN UINT32 Size
+ IN UINT8 *ImageBase,
+ IN UINT32 Offset,
+ IN UINT32 Size
)
{
- UINT32 Index;
- Elf32_Ehdr *Ehdr;
- Elf32_Shdr *Shdr;
+ UINT32 Index;
+ Elf32_Ehdr *Ehdr;
+ Elf32_Shdr *Shdr;
Ehdr = (Elf32_Ehdr *)ImageBase;
- Shdr = (Elf32_Shdr *) (ImageBase + Ehdr->e_shoff);
+ Shdr = (Elf32_Shdr *)(ImageBase + Ehdr->e_shoff);
for (Index = 0; Index < Ehdr->e_shnum; Index++) {
if ((Shdr->sh_offset == Offset) && (Shdr->sh_size == Size)) {
return Shdr;
}
+
Shdr = ELF_NEXT_ENTRY (Elf32_Shdr, Shdr, Ehdr->e_shentsize);
}
+
return NULL;
}
@@ -102,27 +104,28 @@ GetElf32SectionByRange ( **/
EFI_STATUS
ProcessRelocation32 (
- IN Elf32_Rela *Rela,
- IN UINT32 RelaSize,
- IN UINT32 RelaEntrySize,
- IN UINT32 RelaType,
- IN INTN Delta,
- IN BOOLEAN DynamicLinking
+ IN Elf32_Rela *Rela,
+ IN UINT32 RelaSize,
+ IN UINT32 RelaEntrySize,
+ IN UINT32 RelaType,
+ IN INTN Delta,
+ IN BOOLEAN DynamicLinking
)
{
- UINTN Index;
- UINT32 *Ptr;
- UINT32 Type;
+ UINTN Index;
+ UINT32 *Ptr;
+ UINT32 Type;
for ( Index = 0
- ; RelaEntrySize * Index < RelaSize
- ; Index++, Rela = ELF_NEXT_ENTRY (Elf32_Rela, Rela, RelaEntrySize)
- ) {
+ ; RelaEntrySize * Index < RelaSize
+ ; Index++, Rela = ELF_NEXT_ENTRY (Elf32_Rela, Rela, RelaEntrySize)
+ )
+ {
//
// r_offset is the virtual address of the storage unit affected by the relocation.
//
- Ptr = (UINT32 *)(UINTN)(Rela->r_offset + Delta);
- Type = ELF32_R_TYPE(Rela->r_info);
+ Ptr = (UINT32 *)(UINTN)(Rela->r_offset + Delta);
+ Type = ELF32_R_TYPE (Rela->r_info);
switch (Type) {
case R_386_NONE:
case R_386_PC32:
@@ -139,8 +142,9 @@ ProcessRelocation32 ( DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
} else {
- *Ptr += (UINT32) Delta;
+ *Ptr += (UINT32)Delta;
}
+
break;
case R_386_RELATIVE:
@@ -164,12 +168,12 @@ ProcessRelocation32 ( // Calculation: B + A
//
if (RelaType == SHT_RELA) {
- *Ptr = (UINT32) Delta + Rela->r_addend;
+ *Ptr = (UINT32)Delta + Rela->r_addend;
} else {
//
// A is stored in the field of relocation for REL type.
//
- *Ptr = (UINT32) Delta + *Ptr;
+ *Ptr = (UINT32)Delta + *Ptr;
}
} else {
//
@@ -178,12 +182,14 @@ ProcessRelocation32 ( DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
}
+
break;
default:
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
}
}
+
return EFI_SUCCESS;
}
@@ -197,19 +203,19 @@ ProcessRelocation32 ( **/
EFI_STATUS
RelocateElf32Dynamic (
- IN ELF_IMAGE_CONTEXT *ElfCt
+ IN ELF_IMAGE_CONTEXT *ElfCt
)
{
- UINT32 Index;
- Elf32_Phdr *Phdr;
- Elf32_Shdr *DynShdr;
- Elf32_Shdr *RelShdr;
- Elf32_Dyn *Dyn;
- UINT32 RelaAddress;
- UINT32 RelaCount;
- UINT32 RelaSize;
- UINT32 RelaEntrySize;
- UINT32 RelaType;
+ UINT32 Index;
+ Elf32_Phdr *Phdr;
+ Elf32_Shdr *DynShdr;
+ Elf32_Shdr *RelShdr;
+ Elf32_Dyn *Dyn;
+ UINT32 RelaAddress;
+ UINT32 RelaCount;
+ UINT32 RelaSize;
+ UINT32 RelaEntrySize;
+ UINT32 RelaType;
//
// 1. Locate the dynamic section.
@@ -239,6 +245,7 @@ RelocateElf32Dynamic ( if (DynShdr == NULL) {
return EFI_UNSUPPORTED;
}
+
ASSERT (DynShdr->sh_type == SHT_DYNAMIC);
ASSERT (DynShdr->sh_entsize >= sizeof (*Dyn));
@@ -250,10 +257,11 @@ RelocateElf32Dynamic ( RelaCount = 0;
RelaEntrySize = 0;
RelaType = 0;
- for ( Index = 0, Dyn = (Elf32_Dyn *) (ElfCt->FileBase + DynShdr->sh_offset)
- ; Index < DynShdr->sh_size / DynShdr->sh_entsize
- ; Index++, Dyn = ELF_NEXT_ENTRY (Elf32_Dyn, Dyn, DynShdr->sh_entsize)
- ) {
+ for ( Index = 0, Dyn = (Elf32_Dyn *)(ElfCt->FileBase + DynShdr->sh_offset)
+ ; Index < DynShdr->sh_size / DynShdr->sh_entsize
+ ; Index++, Dyn = ELF_NEXT_ENTRY (Elf32_Dyn, Dyn, DynShdr->sh_entsize)
+ )
+ {
switch (Dyn->d_tag) {
case DT_RELA:
case DT_REL:
@@ -265,7 +273,7 @@ RelocateElf32Dynamic ( // For consistency, files do not contain relocation entries to ``correct'' addresses in the dynamic structure.
//
RelaAddress = Dyn->d_un.d_ptr;
- RelaType = (Dyn->d_tag == DT_RELA) ? SHT_RELA: SHT_REL;
+ RelaType = (Dyn->d_tag == DT_RELA) ? SHT_RELA : SHT_REL;
break;
case DT_RELACOUNT:
case DT_RELCOUNT:
@@ -304,12 +312,14 @@ RelocateElf32Dynamic ( if ((RelShdr->sh_addr == RelaAddress) && (RelShdr->sh_size == RelaSize)) {
break;
}
+
RelShdr = NULL;
}
if (RelShdr == NULL) {
return EFI_UNSUPPORTED;
}
+
ASSERT (RelShdr->sh_type == RelaType);
ASSERT (RelShdr->sh_entsize == RelaEntrySize);
@@ -317,9 +327,11 @@ RelocateElf32Dynamic ( // 3. Process the relocation section.
//
ProcessRelocation32 (
- (Elf32_Rela *) (ElfCt->FileBase + RelShdr->sh_offset),
- RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
- (UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress,
+ (Elf32_Rela *)(ElfCt->FileBase + RelShdr->sh_offset),
+ RelShdr->sh_size,
+ RelShdr->sh_entsize,
+ RelShdr->sh_type,
+ (UINTN)ElfCt->ImageAddress - (UINTN)ElfCt->PreferredImageAddress,
TRUE
);
return EFI_SUCCESS;
@@ -335,22 +347,22 @@ RelocateElf32Dynamic ( **/
EFI_STATUS
RelocateElf32Sections (
- IN ELF_IMAGE_CONTEXT *ElfCt
+ IN ELF_IMAGE_CONTEXT *ElfCt
)
{
- EFI_STATUS Status;
- Elf32_Ehdr *Ehdr;
- Elf32_Shdr *RelShdr;
- Elf32_Shdr *Shdr;
- UINT32 Index;
- UINTN Delta;
-
- Ehdr = (Elf32_Ehdr *)ElfCt->FileBase;
+ EFI_STATUS Status;
+ Elf32_Ehdr *Ehdr;
+ Elf32_Shdr *RelShdr;
+ Elf32_Shdr *Shdr;
+ UINT32 Index;
+ UINTN Delta;
+
+ Ehdr = (Elf32_Ehdr *)ElfCt->FileBase;
if (Ehdr->e_machine != EM_386) {
return EFI_UNSUPPORTED;
}
- Delta = (UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress;
+ Delta = (UINTN)ElfCt->ImageAddress - (UINTN)ElfCt->PreferredImageAddress;
ElfCt->EntryPoint = (UINTN)(Ehdr->e_entry + Delta);
//
@@ -373,22 +385,27 @@ RelocateElf32Sections ( // The below relocation is needed in this case.
//
DEBUG ((DEBUG_INFO, "EXEC ELF: Fix actual/preferred base address delta ...\n"));
- for ( Index = 0, RelShdr = (Elf32_Shdr *) (ElfCt->FileBase + Ehdr->e_shoff)
- ; Index < Ehdr->e_shnum
- ; Index++, RelShdr = ELF_NEXT_ENTRY (Elf32_Shdr, RelShdr, Ehdr->e_shentsize)
- ) {
+ for ( Index = 0, RelShdr = (Elf32_Shdr *)(ElfCt->FileBase + Ehdr->e_shoff)
+ ; Index < Ehdr->e_shnum
+ ; Index++, RelShdr = ELF_NEXT_ENTRY (Elf32_Shdr, RelShdr, Ehdr->e_shentsize)
+ )
+ {
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
+
Shdr = GetElf32SectionByIndex (ElfCt->FileBase, RelShdr->sh_info);
if ((Shdr->sh_flags & SHF_ALLOC) == SHF_ALLOC) {
//
// Only fix up sections that occupy memory during process execution.
//
ProcessRelocation32 (
- (Elf32_Rela *)((UINT8*)Ehdr + RelShdr->sh_offset),
- RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
- Delta, FALSE
+ (Elf32_Rela *)((UINT8 *)Ehdr + RelShdr->sh_offset),
+ RelShdr->sh_size,
+ RelShdr->sh_entsize,
+ RelShdr->sh_type,
+ Delta,
+ FALSE
);
}
}
@@ -411,13 +428,13 @@ RelocateElf32Sections ( **/
EFI_STATUS
LoadElf32Image (
- IN ELF_IMAGE_CONTEXT *ElfCt
+ IN ELF_IMAGE_CONTEXT *ElfCt
)
{
- Elf32_Ehdr *Ehdr;
- Elf32_Phdr *Phdr;
- UINT16 Index;
- UINTN Delta;
+ Elf32_Ehdr *Ehdr;
+ Elf32_Phdr *Phdr;
+ UINT16 Index;
+ UINTN Delta;
ASSERT (ElfCt != NULL);
@@ -427,14 +444,16 @@ LoadElf32Image ( Ehdr = (Elf32_Ehdr *)ElfCt->FileBase;
for ( Index = 0, Phdr = (Elf32_Phdr *)(ElfCt->FileBase + Ehdr->e_phoff)
- ; Index < Ehdr->e_phnum
- ; Index++, Phdr = ELF_NEXT_ENTRY (Elf32_Phdr, Phdr, Ehdr->e_phentsize)
- ) {
+ ; Index < Ehdr->e_phnum
+ ; Index++, Phdr = ELF_NEXT_ENTRY (Elf32_Phdr, Phdr, Ehdr->e_phentsize)
+ )
+ {
//
// Skip segments that don't require load (type tells, or size is 0)
//
if ((Phdr->p_type != PT_LOAD) ||
- (Phdr->p_memsz == 0)) {
+ (Phdr->p_memsz == 0))
+ {
continue;
}
@@ -442,7 +461,7 @@ LoadElf32Image ( // The memory offset of segment relative to the image base
// Note: CopyMem() does nothing when the dst equals to src.
//
- Delta = Phdr->p_paddr - (UINT32) (UINTN) ElfCt->PreferredImageAddress;
+ Delta = Phdr->p_paddr - (UINT32)(UINTN)ElfCt->PreferredImageAddress;
CopyMem (ElfCt->ImageAddress + Delta, ElfCt->FileBase + Phdr->p_offset, Phdr->p_filesz);
ZeroMem (ElfCt->ImageAddress + Delta + Phdr->p_filesz, Phdr->p_memsz - Phdr->p_filesz);
}
|