+++ /dev/null
-#include <stdio.h>
-#include <stdlib.h>
-#include <netinet/in.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-
-#define ElfHeaderSize (64 * 1024)
-#define ElfPages (ElfHeaderSize / 4096)
-#define KERNELBASE (0xc0000000)
-
-void get4k(FILE *file, char *buf )
-{
- unsigned j;
- unsigned num = fread(buf, 1, 4096, file);
- for ( j=num; j<4096; ++j )
- buf[j] = 0;
-}
-
-void put4k(FILE *file, char *buf )
-{
- fwrite(buf, 1, 4096, file);
-}
-
-void death(const char *msg, FILE *fdesc, const char *fname)
-{
- printf(msg);
- fclose(fdesc);
- unlink(fname);
- exit(1);
-}
-
-int main(int argc, char **argv)
-{
- char inbuf[4096];
- FILE *ramDisk = NULL;
- FILE *inputVmlinux = NULL;
- FILE *outputVmlinux = NULL;
- unsigned i = 0;
- u_int32_t ramFileLen = 0;
- u_int32_t ramLen = 0;
- u_int32_t roundR = 0;
- u_int32_t kernelLen = 0;
- u_int32_t actualKernelLen = 0;
- u_int32_t round = 0;
- u_int32_t roundedKernelLen = 0;
- u_int32_t ramStartOffs = 0;
- u_int32_t ramPages = 0;
- u_int32_t roundedKernelPages = 0;
- u_int32_t hvReleaseData = 0;
- u_int32_t eyeCatcher = 0xc8a5d9c4;
- u_int32_t naca = 0;
- u_int32_t xRamDisk = 0;
- u_int32_t xRamDiskSize = 0;
- if ( argc < 2 ) {
- printf("Name of RAM disk file missing.\n");
- exit(1);
- }
-
- if ( argc < 3 ) {
- printf("Name of vmlinux file missing.\n");
- exit(1);
- }
-
- if ( argc < 4 ) {
- printf("Name of vmlinux output file missing.\n");
- exit(1);
- }
-
- ramDisk = fopen(argv[1], "r");
- if ( ! ramDisk ) {
- printf("RAM disk file \"%s\" failed to open.\n", argv[1]);
- exit(1);
- }
- inputVmlinux = fopen(argv[2], "r");
- if ( ! inputVmlinux ) {
- printf("vmlinux file \"%s\" failed to open.\n", argv[2]);
- exit(1);
- }
- outputVmlinux = fopen(argv[3], "w+");
- if ( ! outputVmlinux ) {
- printf("output vmlinux file \"%s\" failed to open.\n", argv[3]);
- exit(1);
- }
- fseek(ramDisk, 0, SEEK_END);
- ramFileLen = ftell(ramDisk);
- fseek(ramDisk, 0, SEEK_SET);
- printf("%s file size = %d\n", argv[1], ramFileLen);
-
- ramLen = ramFileLen;
-
- roundR = 4096 - (ramLen % 4096);
- if ( roundR ) {
- printf("Rounding RAM disk file up to a multiple of 4096, adding %d\n", roundR);
- ramLen += roundR;
- }
-
- printf("Rounded RAM disk size is %d\n", ramLen);
- fseek(inputVmlinux, 0, SEEK_END);
- kernelLen = ftell(inputVmlinux);
- fseek(inputVmlinux, 0, SEEK_SET);
- printf("kernel file size = %d\n", kernelLen);
- if ( kernelLen == 0 ) {
- printf("You must have a linux kernel specified as argv[2]\n");
- exit(1);
- }
-
- actualKernelLen = kernelLen - ElfHeaderSize;
-
- printf("actual kernel length (minus ELF header) = %d\n", actualKernelLen);
-
- round = actualKernelLen % 4096;
- roundedKernelLen = actualKernelLen;
- if ( round )
- roundedKernelLen += (4096 - round);
-
- printf("actual kernel length rounded up to a 4k multiple = %d\n", roundedKernelLen);
-
- ramStartOffs = roundedKernelLen;
- ramPages = ramLen / 4096;
-
- printf("RAM disk pages to copy = %d\n", ramPages);
-
- // Copy 64K ELF header
- for (i=0; i<(ElfPages); ++i) {
- get4k( inputVmlinux, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- roundedKernelPages = roundedKernelLen / 4096;
-
- fseek(inputVmlinux, ElfHeaderSize, SEEK_SET);
-
- for ( i=0; i<roundedKernelPages; ++i ) {
- get4k( inputVmlinux, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- for ( i=0; i<ramPages; ++i ) {
- get4k( ramDisk, inbuf );
- put4k( outputVmlinux, inbuf );
- }
-
- /* Close the input files */
- fclose(ramDisk);
- fclose(inputVmlinux);
- /* And flush the written output file */
- fflush(outputVmlinux);
-
- /* fseek to the hvReleaseData pointer */
- fseek(outputVmlinux, ElfHeaderSize + 0x24, SEEK_SET);
- if (fread(&hvReleaseData, 4, 1, outputVmlinux) != 1) {
- death("Could not read hvReleaseData pointer\n", outputVmlinux, argv[3]);
- }
- hvReleaseData = ntohl(hvReleaseData); /* Convert to native int */
- printf("hvReleaseData is at %08x\n", hvReleaseData);
-
- /* fseek to the hvReleaseData */
- fseek(outputVmlinux, ElfHeaderSize + hvReleaseData, SEEK_SET);
- if (fread(inbuf, 0x40, 1, outputVmlinux) != 1) {
- death("Could not read hvReleaseData\n", outputVmlinux, argv[3]);
- }
- /* Check hvReleaseData sanity */
- if (memcmp(inbuf, &eyeCatcher, 4) != 0) {
- death("hvReleaseData is invalid\n", outputVmlinux, argv[3]);
- }
- /* Get the naca pointer */
- naca = ntohl(*((u_int32_t *) &inbuf[0x0c])) - KERNELBASE;
- printf("naca is at %08x\n", naca);
-
- /* fseek to the naca */
- fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
- if (fread(inbuf, 0x18, 1, outputVmlinux) != 1) {
- death("Could not read naca\n", outputVmlinux, argv[3]);
- }
- xRamDisk = ntohl(*((u_int32_t *) &inbuf[0x0c]));
- xRamDiskSize = ntohl(*((u_int32_t *) &inbuf[0x14]));
- /* Make sure a RAM disk isn't already present */
- if ((xRamDisk != 0) || (xRamDiskSize != 0)) {
- death("RAM disk is already attached to this kernel\n", outputVmlinux, argv[3]);
- }
- /* Fill in the values */
- *((u_int32_t *) &inbuf[0x0c]) = htonl(ramStartOffs);
- *((u_int32_t *) &inbuf[0x14]) = htonl(ramPages);
-
- /* Write out the new naca */
- fflush(outputVmlinux);
- fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
- if (fwrite(inbuf, 0x18, 1, outputVmlinux) != 1) {
- death("Could not write naca\n", outputVmlinux, argv[3]);
- }
- printf("RAM Disk of 0x%x pages size is attached to the kernel at offset 0x%08x\n",
- ramPages, ramStartOffs);
-
- /* Done */
- fclose(outputVmlinux);
- /* Set permission to executable */
- chmod(argv[3], S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
-
- return 0;
-}
-
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff