Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 300 insertions, 0 deletions

diff --git a/arch/ppc64/boot/addRamDisk.c b/arch/ppc64/boot/addRamDisk.c
new file mode 100644
index 000000000000..7f2c09473394
--- /dev/null
+++ b/arch/ppc64/boot/addRamDisk.c
@@ -0,0 +1,300 @@
+#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 (0xc000000000000000)
+
+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) 
+{
+        fprintf(stderr, msg);
+        fclose(fdesc);
+        unlink(fname);
+        exit(1);
+}
+
+int main(int argc, char **argv)
+{
+        char inbuf[4096];
+        FILE *ramDisk = NULL;
+        FILE *sysmap = NULL;
+        FILE *inputVmlinux = NULL;
+        FILE *outputVmlinux = NULL;
+  
+        unsigned i = 0;
+        unsigned long ramFileLen = 0;
+        unsigned long ramLen = 0;
+        unsigned long roundR = 0;
+  
+        unsigned long sysmapFileLen = 0;
+        unsigned long sysmapLen = 0;
+        unsigned long sysmapPages = 0;
+        char* ptr_end = NULL; 
+        unsigned long offset_end = 0;
+
+        unsigned long kernelLen = 0;
+        unsigned long actualKernelLen = 0;
+        unsigned long round = 0;
+        unsigned long roundedKernelLen = 0;
+        unsigned long ramStartOffs = 0;
+        unsigned long ramPages = 0;
+        unsigned long roundedKernelPages = 0;
+        unsigned long hvReleaseData = 0;
+        u_int32_t eyeCatcher = 0xc8a5d9c4;
+        unsigned long naca = 0;
+        unsigned long xRamDisk = 0;
+        unsigned long xRamDiskSize = 0;
+        long padPages = 0;
+  
+  
+        if (argc < 2) {
+                fprintf(stderr, "Name of RAM disk file missing.\n");
+                exit(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);
+        }
+
+        if (argc < 5) {
+                fprintf(stderr, "Name of vmlinux output file missing.\n");
+                exit(1);
+        }
+
+
+        ramDisk = fopen(argv[1], "r");
+        if ( ! ramDisk ) {
+                fprintf(stderr, "RAM disk file \"%s\" failed to open.\n", argv[1]);
+                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(argv[3], "r");
+        if ( ! inputVmlinux ) {
+                fprintf(stderr, "vmlinux file \"%s\" failed to open.\n", argv[3]);
+                exit(1);
+        }
+  
+        outputVmlinux = fopen(argv[4], "w+");
+        if ( ! outputVmlinux ) {
+                fprintf(stderr, "output vmlinux file \"%s\" failed to open.\n", argv[4]);
+                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;
+
+        printf("actual kernel length (minus ELF header) = %d\n", actualKernelLen);
+
+        round = actualKernelLen % 4096;
+        roundedKernelLen = actualKernelLen;
+        if ( round )
+                roundedKernelLen += (4096 - round);
+        printf("Vmlinux length rounded up to a 4k multiple = %ld/0x%lx \n", roundedKernelLen, roundedKernelLen);
+        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);
+        /* calc how many pages we need to insert between the vmlinux and the start of the ram disk */
+        padPages = offset_end/4096 - roundedKernelPages;
+
+        /* Check and see if the vmlinux is already larger than _end in System.map */
+        if (padPages < 0) {
+                /* vmlinux is larger than _end - adjust the offset to the start of the embedded ram disk */ 
+                offset_end = roundedKernelLen;
+                printf("vmlinux is larger than _end indicates it needs to be - offset_end = %lx \n", offset_end);
+                padPages = 0;
+                printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
+        }
+        else {
+                /* _end is larger than vmlinux - use the offset to _end that we calculated from the system map */
+                printf("vmlinux is smaller than _end indicates is needed - offset_end = %lx \n", offset_end);
+                printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
+        }
+
+
+
+        /* Input Ram Disk file */
+        // Set the offset that the ram disk will be started at.
+        ramStartOffs = offset_end;  /* determined from the input vmlinux file and the system map */
+        printf("Ram Disk will start at offset = 0x%lx \n", ramStartOffs);
+  
+        fseek(ramDisk, 0, SEEK_END);
+        ramFileLen = ftell(ramDisk);
+        fseek(ramDisk, 0, SEEK_SET);
+        printf("%s file size = %ld/0x%lx \n", argv[1], ramFileLen, ramFileLen);
+
+        ramLen = ramFileLen;
+
+        roundR = 4096 - (ramLen % 4096);
+        if ( roundR ) {
+                printf("Rounding RAM disk file up to a multiple of 4096, adding %ld/0x%lx \n", roundR, roundR);
+                ramLen += roundR;
+        }
+
+        printf("Rounded RAM disk size is %ld/0x%lx \n", ramLen, ramLen);
+        ramPages = ramLen / 4096;
+        printf("RAM disk pages to copy = %ld/0x%lx\n", ramPages, ramPages);
+
+
+
+  // Copy 64K ELF header
+        for (i=0; i<(ElfPages); ++i) {
+                get4k( inputVmlinux, inbuf );
+                put4k( outputVmlinux, inbuf );
+        }
+
+        /* Copy the vmlinux (as full pages). */
+        fseek(inputVmlinux, ElfHeaderSize, SEEK_SET);
+        for ( i=0; i<roundedKernelPages; ++i ) {
+                get4k( inputVmlinux, inbuf );
+                put4k( outputVmlinux, inbuf );
+        }
+  
+        /* Insert pad pages (if appropriate) that are needed between */
+        /* | the end of the vmlinux and the ram disk. */
+        for (i=0; i<padPages; ++i) {
+                memset(inbuf, 0, 4096);
+                put4k(outputVmlinux, inbuf);
+        }
+
+        /* Copy the ram disk (as full pages). */
+        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);
+
+
+
+        /* Fixup the new vmlinux to contain the ram disk starting offset (xRamDisk) and the ram disk size (xRamDiskSize) */
+        /* 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[4]);
+        }
+        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[4]);
+        }
+        /* Check hvReleaseData sanity */
+        if (memcmp(inbuf, &eyeCatcher, 4) != 0) {
+                death("hvReleaseData is invalid\n", outputVmlinux, argv[4]);
+        }
+        /* Get the naca pointer */
+        naca = ntohl(*((u_int32_t*) &inbuf[0x0C])) - KERNELBASE;
+        printf("Naca is at offset 0x%lx \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[4]);
+        }
+        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[4]);
+        }
+        /* 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[4]);
+        }
+        printf("Ram Disk of 0x%lx pages is attached to the kernel at offset 0x%08x\n",
+               ramPages, ramStartOffs);
+
+        /* Done */
+        fclose(outputVmlinux);
+        /* Set permission to executable */
+        chmod(argv[4], S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
+
+        return 0;
+}
+