powerpc/boot: Remove addRamdisk.c since it is now unused
It was used in the dim distant past for adding initrds to images for legacy iSeries, but it's not even used for that now that we have initramfs. So remove it. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Paul Mackerras
Benjamin Herrenschmidt
parent
b5416ca9f8
commit
97bb63e496
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@ -141,7 +141,7 @@ $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
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$(obj)/wrapper.a: $(obj-wlib) FORCE
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$(call if_changed,bootar)
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hostprogs-y := addnote addRamDisk hack-coff mktree
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hostprogs-y := addnote hack-coff mktree
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targets += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
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extra-y := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
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@ -1,311 +0,0 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <elf.h>
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#define ElfHeaderSize (64 * 1024)
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#define ElfPages (ElfHeaderSize / 4096)
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#define KERNELBASE (0xc000000000000000)
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#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
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struct addr_range {
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unsigned long long addr;
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unsigned long memsize;
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unsigned long offset;
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};
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static int check_elf64(void *p, int size, struct addr_range *r)
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{
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Elf64_Ehdr *elf64 = p;
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Elf64_Phdr *elf64ph;
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if (elf64->e_ident[EI_MAG0] != ELFMAG0 ||
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elf64->e_ident[EI_MAG1] != ELFMAG1 ||
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elf64->e_ident[EI_MAG2] != ELFMAG2 ||
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elf64->e_ident[EI_MAG3] != ELFMAG3 ||
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elf64->e_ident[EI_CLASS] != ELFCLASS64 ||
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elf64->e_ident[EI_DATA] != ELFDATA2MSB ||
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elf64->e_type != ET_EXEC || elf64->e_machine != EM_PPC64)
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return 0;
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if ((elf64->e_phoff + sizeof(Elf64_Phdr)) > size)
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return 0;
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elf64ph = (Elf64_Phdr *) ((unsigned long)elf64 +
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(unsigned long)elf64->e_phoff);
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r->memsize = (unsigned long)elf64ph->p_memsz;
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r->offset = (unsigned long)elf64ph->p_offset;
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r->addr = (unsigned long long)elf64ph->p_vaddr;
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#ifdef DEBUG
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printf("PPC64 ELF file, ph:\n");
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printf("p_type 0x%08x\n", elf64ph->p_type);
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printf("p_flags 0x%08x\n", elf64ph->p_flags);
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printf("p_offset 0x%016llx\n", elf64ph->p_offset);
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printf("p_vaddr 0x%016llx\n", elf64ph->p_vaddr);
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printf("p_paddr 0x%016llx\n", elf64ph->p_paddr);
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printf("p_filesz 0x%016llx\n", elf64ph->p_filesz);
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printf("p_memsz 0x%016llx\n", elf64ph->p_memsz);
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printf("p_align 0x%016llx\n", elf64ph->p_align);
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printf("... skipping 0x%08lx bytes of ELF header\n",
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(unsigned long)elf64ph->p_offset);
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#endif
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return 64;
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}
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static void get4k(FILE *file, char *buf )
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{
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unsigned j;
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unsigned num = fread(buf, 1, 4096, file);
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for ( j=num; j<4096; ++j )
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buf[j] = 0;
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}
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static void put4k(FILE *file, char *buf )
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{
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fwrite(buf, 1, 4096, file);
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}
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static void death(const char *msg, FILE *fdesc, const char *fname)
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{
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fprintf(stderr, msg);
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fclose(fdesc);
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unlink(fname);
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exit(1);
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}
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int main(int argc, char **argv)
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{
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char inbuf[4096];
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struct addr_range vmlinux;
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FILE *ramDisk;
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FILE *inputVmlinux;
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FILE *outputVmlinux;
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char *rd_name, *lx_name, *out_name;
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size_t i;
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unsigned long ramFileLen;
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unsigned long ramLen;
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unsigned long roundR;
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unsigned long offset_end;
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unsigned long kernelLen;
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unsigned long actualKernelLen;
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unsigned long round;
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unsigned long roundedKernelLen;
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unsigned long ramStartOffs;
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unsigned long ramPages;
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unsigned long roundedKernelPages;
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unsigned long hvReleaseData;
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u_int32_t eyeCatcher = 0xc8a5d9c4;
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unsigned long naca;
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unsigned long xRamDisk;
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unsigned long xRamDiskSize;
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long padPages;
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if (argc < 2) {
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fprintf(stderr, "Name of RAM disk file missing.\n");
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exit(1);
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}
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rd_name = argv[1];
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if (argc < 3) {
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fprintf(stderr, "Name of vmlinux file missing.\n");
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exit(1);
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}
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lx_name = argv[2];
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if (argc < 4) {
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fprintf(stderr, "Name of vmlinux output file missing.\n");
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exit(1);
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}
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out_name = argv[3];
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ramDisk = fopen(rd_name, "r");
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if ( ! ramDisk ) {
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fprintf(stderr, "RAM disk file \"%s\" failed to open.\n", rd_name);
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exit(1);
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}
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inputVmlinux = fopen(lx_name, "r");
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if ( ! inputVmlinux ) {
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fprintf(stderr, "vmlinux file \"%s\" failed to open.\n", lx_name);
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exit(1);
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}
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outputVmlinux = fopen(out_name, "w+");
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if ( ! outputVmlinux ) {
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fprintf(stderr, "output vmlinux file \"%s\" failed to open.\n", out_name);
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exit(1);
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}
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i = fread(inbuf, 1, sizeof(inbuf), inputVmlinux);
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if (i != sizeof(inbuf)) {
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fprintf(stderr, "can not read vmlinux file %s: %u\n", lx_name, i);
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exit(1);
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}
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i = check_elf64(inbuf, sizeof(inbuf), &vmlinux);
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if (i == 0) {
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fprintf(stderr, "You must have a linux kernel specified as argv[2]\n");
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exit(1);
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}
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/* Input Vmlinux file */
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fseek(inputVmlinux, 0, SEEK_END);
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kernelLen = ftell(inputVmlinux);
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fseek(inputVmlinux, 0, SEEK_SET);
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printf("kernel file size = %lu\n", kernelLen);
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actualKernelLen = kernelLen - ElfHeaderSize;
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printf("actual kernel length (minus ELF header) = %lu\n", actualKernelLen);
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round = actualKernelLen % 4096;
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roundedKernelLen = actualKernelLen;
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if ( round )
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roundedKernelLen += (4096 - round);
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printf("Vmlinux length rounded up to a 4k multiple = %ld/0x%lx \n", roundedKernelLen, roundedKernelLen);
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roundedKernelPages = roundedKernelLen / 4096;
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printf("Vmlinux pages to copy = %ld/0x%lx \n", roundedKernelPages, roundedKernelPages);
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offset_end = _ALIGN_UP(vmlinux.memsize, 4096);
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/* calc how many pages we need to insert between the vmlinux and the start of the ram disk */
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padPages = offset_end/4096 - roundedKernelPages;
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/* Check and see if the vmlinux is already larger than _end in System.map */
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if (padPages < 0) {
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/* vmlinux is larger than _end - adjust the offset to the start of the embedded ram disk */
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offset_end = roundedKernelLen;
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printf("vmlinux is larger than _end indicates it needs to be - offset_end = %lx \n", offset_end);
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padPages = 0;
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printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
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}
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else {
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/* _end is larger than vmlinux - use the offset to _end that we calculated from the system map */
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printf("vmlinux is smaller than _end indicates is needed - offset_end = %lx \n", offset_end);
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printf("will insert %lx pages between the vmlinux and the start of the ram disk \n", padPages);
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}
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/* Input Ram Disk file */
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// Set the offset that the ram disk will be started at.
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ramStartOffs = offset_end; /* determined from the input vmlinux file and the system map */
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printf("Ram Disk will start at offset = 0x%lx \n", ramStartOffs);
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fseek(ramDisk, 0, SEEK_END);
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ramFileLen = ftell(ramDisk);
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fseek(ramDisk, 0, SEEK_SET);
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printf("%s file size = %ld/0x%lx \n", rd_name, ramFileLen, ramFileLen);
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ramLen = ramFileLen;
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roundR = 4096 - (ramLen % 4096);
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if ( roundR ) {
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printf("Rounding RAM disk file up to a multiple of 4096, adding %ld/0x%lx \n", roundR, roundR);
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ramLen += roundR;
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}
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printf("Rounded RAM disk size is %ld/0x%lx \n", ramLen, ramLen);
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ramPages = ramLen / 4096;
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printf("RAM disk pages to copy = %ld/0x%lx\n", ramPages, ramPages);
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// Copy 64K ELF header
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for (i=0; i<(ElfPages); ++i) {
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get4k( inputVmlinux, inbuf );
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put4k( outputVmlinux, inbuf );
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}
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/* Copy the vmlinux (as full pages). */
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fseek(inputVmlinux, ElfHeaderSize, SEEK_SET);
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for ( i=0; i<roundedKernelPages; ++i ) {
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get4k( inputVmlinux, inbuf );
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put4k( outputVmlinux, inbuf );
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}
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/* Insert pad pages (if appropriate) that are needed between */
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/* | the end of the vmlinux and the ram disk. */
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for (i=0; i<padPages; ++i) {
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memset(inbuf, 0, 4096);
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put4k(outputVmlinux, inbuf);
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}
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/* Copy the ram disk (as full pages). */
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for ( i=0; i<ramPages; ++i ) {
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get4k( ramDisk, inbuf );
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put4k( outputVmlinux, inbuf );
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}
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/* Close the input files */
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fclose(ramDisk);
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fclose(inputVmlinux);
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/* And flush the written output file */
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fflush(outputVmlinux);
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/* Fixup the new vmlinux to contain the ram disk starting offset (xRamDisk) and the ram disk size (xRamDiskSize) */
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/* fseek to the hvReleaseData pointer */
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fseek(outputVmlinux, ElfHeaderSize + 0x24, SEEK_SET);
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if (fread(&hvReleaseData, 4, 1, outputVmlinux) != 1) {
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death("Could not read hvReleaseData pointer\n", outputVmlinux, out_name);
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}
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hvReleaseData = ntohl(hvReleaseData); /* Convert to native int */
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printf("hvReleaseData is at %08lx\n", hvReleaseData);
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/* fseek to the hvReleaseData */
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fseek(outputVmlinux, ElfHeaderSize + hvReleaseData, SEEK_SET);
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if (fread(inbuf, 0x40, 1, outputVmlinux) != 1) {
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death("Could not read hvReleaseData\n", outputVmlinux, out_name);
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}
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/* Check hvReleaseData sanity */
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if (memcmp(inbuf, &eyeCatcher, 4) != 0) {
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death("hvReleaseData is invalid\n", outputVmlinux, out_name);
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}
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/* Get the naca pointer */
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naca = ntohl(*((u_int32_t*) &inbuf[0x0C])) - KERNELBASE;
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printf("Naca is at offset 0x%lx \n", naca);
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/* fseek to the naca */
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fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
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if (fread(inbuf, 0x18, 1, outputVmlinux) != 1) {
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death("Could not read naca\n", outputVmlinux, out_name);
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}
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xRamDisk = ntohl(*((u_int32_t *) &inbuf[0x0c]));
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xRamDiskSize = ntohl(*((u_int32_t *) &inbuf[0x14]));
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/* Make sure a RAM disk isn't already present */
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if ((xRamDisk != 0) || (xRamDiskSize != 0)) {
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death("RAM disk is already attached to this kernel\n", outputVmlinux, out_name);
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}
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/* Fill in the values */
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*((u_int32_t *) &inbuf[0x0c]) = htonl(ramStartOffs);
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*((u_int32_t *) &inbuf[0x14]) = htonl(ramPages);
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/* Write out the new naca */
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fflush(outputVmlinux);
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fseek(outputVmlinux, ElfHeaderSize + naca, SEEK_SET);
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if (fwrite(inbuf, 0x18, 1, outputVmlinux) != 1) {
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death("Could not write naca\n", outputVmlinux, out_name);
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}
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printf("Ram Disk of 0x%lx pages is attached to the kernel at offset 0x%08lx\n",
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ramPages, ramStartOffs);
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/* Done */
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fclose(outputVmlinux);
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/* Set permission to executable */
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chmod(out_name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
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return 0;
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}
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