| 0,0 → 1,75 |
|---|
| /* |
| * Swap VMA and LMA in ELF header. |
| * |
| * by Jakub Jermar <jermar@itbs.cz> |
| * |
| * GPL'ed, copyleft |
| */ |
| |
| /* |
| * HP's IA-64 simulator Ski seems to confuse VMA and LMA in the ELF header. |
| * Instead of using LMA, Ski loads sections at their VMA addresses. |
| * This short program provides a workaround for this bug by simply |
| * swapping VMA and LMA in the ELF header of the executable. |
| * |
| * Note that after applying this workaround, you will be able to load |
| * ELF objects with different VMA and LMA in Ski, but the executable |
| * will become wronged for other potential uses. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/mman.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| |
| void syntax(char *prg) |
| { |
| printf("%s ELF-file\n", prg); |
| exit(1); |
| } |
| |
| void error(char *msg) |
| { |
| printf("Error: %s\n", msg); |
| exit(2); |
| } |
| |
| #define ELF_VMA (0x50/sizeof(unsigned long long)) |
| #define ELF_LMA (0x58/sizeof(unsigned long long)) |
| #define ELF_ENTRY (0x18/sizeof(unsigned long long)) |
| |
| #define LENGTH 0x98 |
| |
| int main(int argc, char *argv[]) |
| { |
| int fd; |
| unsigned long long vma, lma,entry; |
| unsigned long long *elf; |
| |
| if (argc != 2) |
| syntax(argv[0]); |
| |
| fd = open(argv[1], O_RDWR); |
| if (fd == -1) |
| error("open failed"); |
| |
| elf = mmap(NULL, LENGTH, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| if ((void *) elf == (void *) -1) |
| error("map failed"); |
| |
| lma = elf[ELF_LMA]; |
| elf[ELF_VMA] = lma; |
| entry = lma; |
| elf[ELF_ENTRY] = entry; |
| |
| if (munmap(elf, LENGTH) == -1) |
| error("munmap failed"); |
| |
| if (close(fd) == -1) |
| error("close failed"); |
| |
| return 0; |
| } |