#include <io.h>\r
#endif\r
#include <assert.h>\r
+#include <stdbool.h>\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <string.h>\r
UINT32 Num\r
)\r
{\r
- if (Num >= mEhdr->e_shnum)\r
- return NULL;\r
+ if (Num >= mEhdr->e_shnum) {\r
+ Error (NULL, 0, 3000, "Invalid", "GetShdrByIndex: Index %u is too high.", Num);\r
+ exit(EXIT_FAILURE);\r
+ }\r
+\r
return (Elf_Shdr*)((UINT8*)mShdrBase + Num * mEhdr->e_shentsize);\r
}\r
\r
)\r
{\r
if (num >= mEhdr->e_phnum) {\r
- return NULL;\r
+ Error (NULL, 0, 3000, "Invalid", "GetPhdrByIndex: Index %u is too high.", num);\r
+ exit(EXIT_FAILURE);\r
}\r
\r
return (Elf_Phdr *)((UINT8*)mPhdrBase + num * mEhdr->e_phentsize);\r
return (BOOLEAN) (Shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == (SHF_ALLOC | SHF_WRITE);\r
}\r
\r
+STATIC\r
+BOOLEAN\r
+IsStrtabShdr (\r
+ Elf_Shdr *Shdr\r
+ )\r
+{\r
+ Elf_Shdr *Namedr = GetShdrByIndex(mEhdr->e_shstrndx);\r
+\r
+ return (BOOLEAN) (strcmp((CHAR8*)mEhdr + Namedr->sh_offset + Shdr->sh_name, ELF_STRTAB_SECTION_NAME) == 0);\r
+}\r
+\r
+STATIC\r
+Elf_Shdr *\r
+FindStrtabShdr (\r
+ VOID\r
+ )\r
+{\r
+ UINT32 i;\r
+ for (i = 0; i < mEhdr->e_shnum; i++) {\r
+ Elf_Shdr *shdr = GetShdrByIndex(i);\r
+ if (IsStrtabShdr(shdr)) {\r
+ return shdr;\r
+ }\r
+ }\r
+ return NULL;\r
+}\r
+\r
+STATIC\r
+const UINT8 *\r
+GetSymName (\r
+ Elf_Sym *Sym\r
+ )\r
+{\r
+ if (Sym->st_name == 0) {\r
+ return NULL;\r
+ }\r
+\r
+ Elf_Shdr *StrtabShdr = FindStrtabShdr();\r
+ if (StrtabShdr == NULL) {\r
+ return NULL;\r
+ }\r
+\r
+ assert(Sym->st_name < StrtabShdr->sh_size);\r
+\r
+ UINT8* StrtabContents = (UINT8*)mEhdr + StrtabShdr->sh_offset;\r
+\r
+ bool foundEnd = false;\r
+ UINT32 i;\r
+ for (i = Sym->st_name; (i < StrtabShdr->sh_size) && !foundEnd; i++) {\r
+ foundEnd = StrtabContents[i] == 0;\r
+ }\r
+ assert(foundEnd);\r
+\r
+ return StrtabContents + Sym->st_name;\r
+}\r
+\r
//\r
// Elf functions interface implementation\r
//\r
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;\r
break;\r
default:\r
- VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN)mEhdr->e_machine);\r
+ VerboseMsg ("%s unknown e_machine type %hu. Assume IA-32", mInImageName, mEhdr->e_machine);\r
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_IA32;\r
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;\r
}\r
// header location.\r
//\r
if (Sym->st_shndx == SHN_UNDEF\r
- || Sym->st_shndx == SHN_ABS\r
- || Sym->st_shndx > mEhdr->e_shnum) {\r
- Error (NULL, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName);\r
+ || Sym->st_shndx >= mEhdr->e_shnum) {\r
+ const UINT8 *SymName = GetSymName(Sym);\r
+ if (SymName == NULL) {\r
+ SymName = (const UINT8 *)"<unknown>";\r
+ }\r
+\r
+ Error (NULL, 0, 3000, "Invalid",\r
+ "%s: Bad definition for symbol '%s'@%#x or unsupported symbol type. "\r
+ "For example, absolute and undefined symbols are not supported.",\r
+ mInImageName, SymName, Sym->st_value);\r
+\r
+ exit(EXIT_FAILURE);\r
}\r
SymShdr = GetShdrByIndex(Sym->st_shndx);\r
\r