#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
+#include <elf.h>
#define ElfHeaderSize (64 * 1024)
#define ElfPages (ElfHeaderSize / 4096)
#define KERNELBASE (0xc000000000000000)
+#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
+struct addr_range {
+ unsigned long long addr;
+ unsigned long memsize;
+ unsigned long offset;
+};
+
+static int check_elf64(void *p, int size, struct addr_range *r)
+{
+ Elf64_Ehdr *elf64 = p;
+ Elf64_Phdr *elf64ph;
+
+ if (elf64->e_ident[EI_MAG0] != ELFMAG0 ||
+ elf64->e_ident[EI_MAG1] != ELFMAG1 ||
+ elf64->e_ident[EI_MAG2] != ELFMAG2 ||
+ elf64->e_ident[EI_MAG3] != ELFMAG3 ||
+ elf64->e_ident[EI_CLASS] != ELFCLASS64 ||
+ elf64->e_ident[EI_DATA] != ELFDATA2MSB ||
+ elf64->e_type != ET_EXEC || elf64->e_machine != EM_PPC64)
+ return 0;
+
+ if ((elf64->e_phoff + sizeof(Elf64_Phdr)) > size)
+ return 0;
+
+ elf64ph = (Elf64_Phdr *) ((unsigned long)elf64 +
+ (unsigned long)elf64->e_phoff);
+
+ r->memsize = (unsigned long)elf64ph->p_memsz;
+ r->offset = (unsigned long)elf64ph->p_offset;
+ r->addr = (unsigned long long)elf64ph->p_vaddr;
+
+#ifdef DEBUG
+ printf("PPC64 ELF file, ph:\n");
+ printf("p_type 0x%08x\n", elf64ph->p_type);
+ printf("p_flags 0x%08x\n", elf64ph->p_flags);
+ printf("p_offset 0x%016llx\n", elf64ph->p_offset);
+ printf("p_vaddr 0x%016llx\n", elf64ph->p_vaddr);
+ printf("p_paddr 0x%016llx\n", elf64ph->p_paddr);
+ printf("p_filesz 0x%016llx\n", elf64ph->p_filesz);
+ printf("p_memsz 0x%016llx\n", elf64ph->p_memsz);
+ printf("p_align 0x%016llx\n", elf64ph->p_align);
+ printf("... skipping 0x%08lx bytes of ELF header\n",
+ (unsigned long)elf64ph->p_offset);
+#endif
+
+ return 64;
+}
void get4k(FILE *file, char *buf )
{
unsigned j;
int main(int argc, char **argv)
{
char inbuf[4096];
+ struct addr_range vmlinux;
FILE *ramDisk;
- FILE *sysmap;
FILE *inputVmlinux;
FILE *outputVmlinux;
char *rd_name, *lx_name, *out_name;
- unsigned i;
+
+ size_t i;
unsigned long ramFileLen;
unsigned long ramLen;
unsigned long roundR;
-
- unsigned long sysmapFileLen;
- unsigned long sysmapLen;
- unsigned long sysmapPages;
- char *ptr_end;
unsigned long offset_end;
unsigned long kernelLen;
fprintf(stderr, "Name of RAM disk file missing.\n");
exit(1);
}
- rd_name = argv[1]
+ rd_name = argv[1];
if (argc < 3) {
- fprintf(stderr, "Name of System Map input file is missing.\n");
- exit(1);
- }
-
- if (argc < 4) {
fprintf(stderr, "Name of vmlinux file missing.\n");
exit(1);
}
- lx_name = argv[3];
+ lx_name = argv[2];
- if (argc < 5) {
+ if (argc < 4) {
fprintf(stderr, "Name of vmlinux output file missing.\n");
exit(1);
}
- out_name = argv[4];
+ out_name = argv[3];
ramDisk = fopen(rd_name, "r");
exit(1);
}
- sysmap = fopen(argv[2], "r");
- if ( ! sysmap ) {
- fprintf(stderr, "System Map file \"%s\" failed to open.\n", argv[2]);
- exit(1);
- }
-
inputVmlinux = fopen(lx_name, "r");
if ( ! inputVmlinux ) {
fprintf(stderr, "vmlinux file \"%s\" failed to open.\n", lx_name);
fprintf(stderr, "output vmlinux file \"%s\" failed to open.\n", out_name);
exit(1);
}
-
-
-
+
+ i = fread(inbuf, 1, sizeof(inbuf), inputVmlinux);
+ if (i != sizeof(inbuf)) {
+ fprintf(stderr, "can not read vmlinux file %s: %u\n", lx_name, i);
+ exit(1);
+ }
+
+ i = check_elf64(inbuf, sizeof(inbuf), &vmlinux);
+ if (i == 0) {
+ fprintf(stderr, "You must have a linux kernel specified as argv[2]\n");
+ exit(1);
+ }
+
/* Input Vmlinux file */
fseek(inputVmlinux, 0, SEEK_END);
kernelLen = ftell(inputVmlinux);
fseek(inputVmlinux, 0, SEEK_SET);
printf("kernel file size = %d\n", kernelLen);
- if ( kernelLen == 0 ) {
- fprintf(stderr, "You must have a linux kernel specified as argv[3]\n");
- exit(1);
- }
actualKernelLen = kernelLen - ElfHeaderSize;
roundedKernelPages = roundedKernelLen / 4096;
printf("Vmlinux pages to copy = %ld/0x%lx \n", roundedKernelPages, roundedKernelPages);
-
-
- /* Input System Map file */
- /* (needs to be processed simply to determine if we need to add pad pages due to the static variables not being included in the vmlinux) */
- fseek(sysmap, 0, SEEK_END);
- sysmapFileLen = ftell(sysmap);
- fseek(sysmap, 0, SEEK_SET);
- printf("%s file size = %ld/0x%lx \n", argv[2], sysmapFileLen, sysmapFileLen);
-
- sysmapLen = sysmapFileLen;
-
- roundR = 4096 - (sysmapLen % 4096);
- if (roundR) {
- printf("Rounding System Map file up to a multiple of 4096, adding %ld/0x%lx \n", roundR, roundR);
- sysmapLen += roundR;
- }
- printf("Rounded System Map size is %ld/0x%lx \n", sysmapLen, sysmapLen);
-
- /* Process the Sysmap file to determine where _end is */
- sysmapPages = sysmapLen / 4096;
- /* read the whole file line by line, expect that it doesn't fail */
- while ( fgets(inbuf, 4096, sysmap) ) ;
- /* search for _end in the last page of the system map */
- ptr_end = strstr(inbuf, " _end");
- if (!ptr_end) {
- fprintf(stderr, "Unable to find _end in the sysmap file \n");
- fprintf(stderr, "inbuf: \n");
- fprintf(stderr, "%s \n", inbuf);
- exit(1);
- }
- printf("Found _end in the last page of the sysmap - backing up 10 characters it looks like %s", ptr_end-10);
- /* convert address of _end in system map to hex offset. */
- offset_end = (unsigned int)strtol(ptr_end-10, NULL, 16);
+ offset_end = _ALIGN_UP(vmlinux.memsize, 4096);
/* calc how many pages we need to insert between the vmlinux and the start of the ram disk */
padPages = offset_end/4096 - roundedKernelPages;
projects / karo-tx-linux.git / blobdiff