On 21/11/07 13:37 -0800, yhlu wrote: > On Nov 21, 2007 12:03 PM, Myles Watson <[EMAIL PROTECTED]> wrote: > > > > > > On Wed, Nov 21, 2007 at 12:13:23PM -0700, Myles Watson wrote: > > > > It makes the same changes as mentioned before, but it also uses the > > > > correct kernel image depending on the architecture. mkelfimage > > > > doesn't work with an x86_64 vmlinux, and with an i386 bzImage it > > > > generates a _much_ larger elf. > > for x86_64 support > there is a patch i posted several months ago.
Excellent! This should fit into buildrom very nicely. Thanks. Jordan > [PATCH] mkelfImage: Take elf64 vmlinux and produce elf32 > > change to use e_entry instead of hardcode for vmlinux > if e_entry is not equal to paddr of fist phdr, will use paddr instead, and > not switch to 64bit in convert > otherwise will use e_entry and switch to 64bit in convert > > also fix the bss_size calculation. > > Signed-off-By: Yinghai Lu <[EMAIL PROTECTED]> > > diff -uNr mkelfImage-2.7/linux-i386/convert.h > mkelfImage-2.7.new/linux-i386/convert.h > --- mkelfImage-2.7/linux-i386/convert.h 2006-03-17 06:08:21.000000000 > -0800 > +++ mkelfImage-2.7.new/linux-i386/convert.h 2006-11-08 12:32:15.000000000 > -0800 > @@ -3,6 +3,8 @@ > #define CONVERTLOC 0x10000 > #define REAL_MODE_DATA_LOC 0x20000 > #define GDTLOC 0x21000 > +#define GDT64LOC 0x22000 > +#define PGTLOC 0x23000 > > #define DEFAULT_ROOT_DEV ((0x3<<8)| 0) > > @@ -18,10 +20,13 @@ > struct image_parameters { > uint32_t convert_magic; /* a signature to verify mkelfImage was built > properly */ > uint32_t gdt_size; > + uint32_t gdt64_size; > + uint32_t pgt_size; > uint32_t bss_size; > uint16_t ramdisk_flags; > uint16_t root_dev; > uint32_t entry; > + uint32_t switch_64; > uint32_t initrd_start; > uint32_t initrd_size; > uint8_t cmdline[CMDLINE_MAX]; > diff -uNr mkelfImage-2.7/linux-i386/convert.lds > mkelfImage-2.7.new/linux-i386/convert.lds > --- mkelfImage-2.7/linux-i386/convert.lds 2003-01-16 13:41:14.000000000 > -0800 > +++ mkelfImage-2.7.new/linux-i386/convert.lds 2006-11-08 12:19:12.000000000 > -0800 > @@ -27,7 +27,7 @@ > *(.bss) > } > _end = . ; > - bss_size = _end - _bss; > + bss_sizex = _end - _bss; > > /DISCARD/ : { > *(.comment) > diff -uNr mkelfImage-2.7/linux-i386/head.S > mkelfImage-2.7.new/linux-i386/head.S > --- mkelfImage-2.7/linux-i386/head.S 2003-01-24 14:48:03.000000000 -0800 > +++ mkelfImage-2.7.new/linux-i386/head.S 2006-11-08 12:19:32.000000000 > -0800 > @@ -59,7 +59,7 @@ > movl $GDTLOC, %edi > movl $(gdt_end - gdt), %ecx > rep movsb > - > + > # Linux makes stupid assumptions about the segments > # that are already setup, so setup a new gdt & ldt > # and then reload the segment registers. > @@ -95,22 +95,113 @@ > # Flag to indicate we are the bootstrap processor > xorl %ebx, %ebx > > + movl switch_64, %eax > + cmp $1, %eax > + jz switch_to_64 > + > # Clear the unspecified registers for good measure > xorl %eax, %eax > xorl %ecx, %ecx > xorl %edx, %edx > xorl %edi, %edi > - xorl %esp, %esp > xorl %ebp, %ebp > + > + # do not clear esp, we still need to use lret later > + > + pushl $PROT_CODE_SEG > + movl entry, %eax > + pushl %eax > + > + lret > + > +switch_to_64: > + > + /* We need to switch to 64bit before use startup_64 entry go to kernel > */ > + /* > + * Prepare for entering 64 bit mode > + */ > + # Move the gdt64 where Linux will not smash it during decompression > + movl %esi, %eax # save the real mode pointer > + movl $gdt64, %esi > + movl $GDT64LOC, %edi > + movl $(gdt64_end - gdt64), %ecx > + rep movsb > + movl %eax, %esi > + > + /* Load new GDT with the 64bit segments using 32bit descriptor */ > + lgdt gdt64 > + > + /* Enable PAE mode */ > + xorl %eax, %eax > + btsl $5, %eax > + movl %eax, %cr4 > + > + /* > + * Build early 4G boot pagetable > + */ > + /* Initialize Page tables to 0*/ > + movl $PGTLOC, %edi > + xorl %eax, %eax > + movl $((4096*6)/4), %ecx > + rep stosl > + > + /* Build Level 4 */ > + movl $(PGTLOC + 0), %edi > + leal 0x1007 (%edi), %eax > + movl %eax, 0(%edi) > + > + /* Build Level 3 */ > + movl $(PGTLOC + 0x1000), %edi > + leal 0x1007(%edi), %eax > + movl $4, %ecx > +1: movl %eax, 0x00(%edi) > + addl $0x00001000, %eax > + addl $8, %edi > + decl %ecx > + jnz 1b > + > + /* Build Level 2 */ > + movl $(PGTLOC + 0x2000), %edi > + movl $0x00000183, %eax > + movl $2048, %ecx > +1: movl %eax, 0(%edi) > + addl $0x00200000, %eax > + addl $8, %edi > + decl %ecx > + jnz 1b > + > + /* Enable the boot page tables */ > + movl $PGTLOC, %eax > + movl %eax, %cr3 > + > + /* Enable Long mode in EFER (Extended Feature Enable Register) */ > + movl $0xc0000080, %ecx > + rdmsr > + btsl $8, %eax > + wrmsr > + > + /* Preparing for 64bit jmp */ > + pushl $PROT_CODE_SEG > + movl entry, %eax > + pushl %eax > + > + /* Enter paged protected Mode, activating Long Mode */ > + xorl %eax, %eax > + btsl $31, %eax > + btsl $0, %eax > + movl %eax, %cr0 > + > + /* > + * At this point we're in long mode but in 32bit compatibility mode > + * with EFER.LME = 1, CS.L = 0, CS.D = 1 (and in turn > + * EFER.LMA = 1). Now we want to jump in 64bit mode, to do that we > use > + * the new gdt/idt that has __KERNEL_CS with CS.L = 1. > + */ > > - > - # Jump to the linux kernel > - ljmp $ PROT_CODE_SEG , $ 0x100000 > + lret > > > /* Routines to query the BIOS... */ > - > - > /************************************************************************** > E820_MEMSIZE - Get a listing of memory regions > **************************************************************************/ > @@ -409,6 +500,7 @@ > .word 0x9200 # data read/write > .word 0x00CF # granularity = 4096, 386 > # (+5th nibble of limit) > + > /* > * The layout of the per-CPU GDT under Linux: > * > @@ -446,7 +538,14 @@ > */ > gdt_end: > > - > +gdt64: > + .word gdt64_end - gdt64 > + .long GDT64LOC > + .word 0 > + .quad 0x0000000000000000 /* NULL descriptor */ > + .quad 0x00af9a000000ffff /* __KERNEL_CS */ > + .quad 0x00cf92000000ffff /* __KERNEL_DS */ > +gdt64_end: > > .section ".trailer", "a" > /* Constants set at build time, these are at the very end of my image */ > @@ -458,14 +557,20 @@ > .long CONVERT_MAGIC > gdt_size: > .long gdt_end - gdt > +gdt64_size: > + .long gdt64_end - gdt64 > +pgt_size: > + .long 4096*6 > bss_size: > - .long bss_size > + .long bss_sizex > ramdisk_flags: > .word 0 > root_dev: > .word DEFAULT_ROOT_DEV > entry: > .long 0 > +switch_64: > + .long 0 > initrd_start: > .long 0 > initrd_size: > diff -uNr mkelfImage-2.7/linux-i386/mkelf-linux-i386.c > mkelfImage-2.7.new/linux-i386/mkelf-linux-i386.c > --- mkelfImage-2.7/linux-i386/mkelf-linux-i386.c 2006-03-17 > 06:08:22.000000000 -0800 > +++ mkelfImage-2.7.new/linux-i386/mkelf-linux-i386.c 2006-11-08 > 09:54:58.000000000 -0800 > @@ -19,13 +19,16 @@ > static void (*parse_kernel_type)(struct kernel_info *info, char *kernel_buf, > size_t kernel_size); > static void parse_bzImage_kernel(struct kernel_info *info, char *kernel_buf, > size_t kernel_size); > static void parse_elf32_kernel(struct kernel_info *info, char *kernel_buf, > size_t kernel_size); > +static void parse_elf64_kernel(struct kernel_info *info, char *kernel_buf, > size_t kernel_size); > + > +char *vmlinux_x86_64_probe(char *kernel_buf, off_t kernel_size); > > char *vmlinux_i386_probe(char *kernel_buf, off_t kernel_size) > { > Elf32_Ehdr *ehdr; > Elf32_Phdr *phdr; > int i; > - int hdr1, hdr2; > + int phdrs; > ehdr = (Elf32_Ehdr *)kernel_buf; > if ( > (ehdr->e_ident[EI_MAG0] != ELFMAG0) || > @@ -35,7 +38,8 @@ > return "No ELF signature found on kernel\n"; > } > if (ehdr->e_ident[EI_CLASS] != ELFCLASS32) { > - return "Not a 32bit ELF kernel\n"; > + return vmlinux_x86_64_probe(kernel_buf, kernel_size); > +// return "Not a 32bit ELF kernel\n"; > } > if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { > return "Not a little endian ELF kernel\n"; > @@ -54,27 +58,64 @@ > return "Kernel uses bad program header size.\n"; > } > phdr = (Elf32_Phdr *)(kernel_buf + le32_to_cpu(ehdr->e_phoff)); > - hdr1 = hdr2 = -1; > - for(i = 0; i < le32_to_cpu(ehdr->e_phnum); i++) { > + phdrs = 0; > + for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) { > if (le32_to_cpu(phdr[i].p_type) != PT_LOAD) > continue; > - if (((hdr1 != -1) && > - ((le32_to_cpu(phdr[hdr1].p_paddr) & 0xfffffff) != > 0x100000)) || > - (hdr2 != -1)) { > - return "Too many PT_LOAD segments to be a linux > kernel\n"; > - } > - if (hdr1 == -1) { > - hdr1 = i; > - } else { > - hdr2 = i; > - } > + phdrs++; > } > - if (hdr1 == -1) { > + if (phdrs == 0) { > return "No PT_LOAD segments!\n"; > } > parse_kernel_type = parse_elf32_kernel; > return 0; > } > +char *vmlinux_x86_64_probe(char *kernel_buf, off_t kernel_size) > +{ > + Elf64_Ehdr *ehdr; > + Elf64_Phdr *phdr; > + int i; > + int phdrs = 0; > + ehdr = (Elf64_Ehdr *)kernel_buf; > + if ( > + (ehdr->e_ident[EI_MAG0] != ELFMAG0) || > + (ehdr->e_ident[EI_MAG1] != ELFMAG1) || > + (ehdr->e_ident[EI_MAG2] != ELFMAG2) || > + (ehdr->e_ident[EI_MAG3] != ELFMAG3)) { > + return "No ELF signature found on kernel\n"; > + } > + if (ehdr->e_ident[EI_CLASS] != ELFCLASS64) { > + return "Not a 64bit ELF kernel\n"; > + } > + if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { > + return "Not a little endian ELF kernel\n"; > + } > + if (le16_to_cpu(ehdr->e_type) != ET_EXEC) { > + return "Not an executable kernel\n"; > + } > + if (le16_to_cpu(ehdr->e_machine) != EM_X86_64) { > + return "Not an x86_64 kernel\n"; > + } > + if ( (ehdr->e_ident[EI_VERSION] != EV_CURRENT) || > + (le32_to_cpu(ehdr->e_version) != EV_CURRENT)) { > + return "Kernel not using ELF version 1.\n"; > + } > + if (le16_to_cpu(ehdr->e_phentsize) != sizeof(*phdr)) { > + return "Kernel uses bad program header size.\n"; > + } > + phdr = (Elf64_Phdr *)(kernel_buf + le64_to_cpu(ehdr->e_phoff)); > + phdrs = 0; > + for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) { > + if (le32_to_cpu(phdr[i].p_type) != PT_LOAD) > + continue; > + phdrs++; > + } > + if (phdrs == 0) { > + return "No PT_LOAD segments!\n"; > + } > + parse_kernel_type = parse_elf64_kernel; > + return 0; > +} > > char *bzImage_i386_probe(char *kernel_buf, off_t kernel_size) > { > @@ -118,17 +159,14 @@ > > struct kernel_info > { > - void *kernel; > - size_t filesz; > - size_t memsz; > - size_t paddr; > - size_t vaddr; > - void *kernel2; > - size_t filesz2; > - size_t memsz2; > - size_t paddr2; > - size_t vaddr2; > + int phdrs; > + void *kernel[4]; > + size_t filesz[4]; > + size_t memsz[4]; > + size_t paddr[4]; > + size_t vaddr[4]; > size_t entry; > + size_t switch_64; > char *version; > }; > > @@ -137,43 +175,68 @@ > Elf32_Ehdr *ehdr; > Elf32_Phdr *phdr; > int i; > - int hdr1, hdr2; > + int phdrs; > ehdr = (Elf32_Ehdr *)kernel_buf; > phdr = (Elf32_Phdr *)(kernel_buf + ehdr->e_phoff); > - hdr1 = hdr2 = -1; > + phdrs = 0; > for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) { > if (le32_to_cpu(phdr[i].p_type) != PT_LOAD) > continue; > - if (hdr2 != -1) { > - die("Too many PT_LOAD segments to be a linux kernel\n"); > - } > - if (hdr1 == -1) { > - hdr1 = i; > - } else { > - hdr2 = i; > - } > - } > - if (hdr1 == -1) { > - die("No PT_LOAD segments!\n"); > + info->kernel[phdrs] = kernel_buf + > le32_to_cpu(phdr[i].p_offset); > + info->filesz[phdrs] = le32_to_cpu(phdr[i].p_filesz); > + info->memsz[phdrs] = le32_to_cpu(phdr[i].p_memsz); > + info->paddr[phdrs] = le32_to_cpu(phdr[i].p_paddr) & 0xfffffff; > + info->vaddr[phdrs] = le32_to_cpu(phdr[i].p_vaddr); > + phdrs++; > } > - info->kernel = kernel_buf + le32_to_cpu(phdr[hdr1].p_offset); > - info->filesz = le32_to_cpu(phdr[hdr1].p_filesz); > - info->memsz = le32_to_cpu(phdr[hdr1].p_memsz); > - info->paddr = le32_to_cpu(phdr[hdr1].p_paddr) & 0xfffffff; > - info->vaddr = le32_to_cpu(phdr[hdr1].p_vaddr); > - > - if (hdr2 != -1) { > - info->kernel2 = kernel_buf + le32_to_cpu(phdr[hdr2].p_offset); > - info->filesz2 = le32_to_cpu(phdr[hdr2].p_filesz); > - info->memsz2 = le32_to_cpu(phdr[hdr2].p_memsz); > - info->paddr2 = le32_to_cpu(phdr[hdr2].p_paddr) & 0xfffffff; > - info->vaddr2 = le32_to_cpu(phdr[hdr2].p_vaddr); > + > + if(!phdrs) > + die("We need at least one phdr\n"); > + > + info->phdrs = phdrs; > + info->entry = le32_to_cpu(ehdr->e_entry); > + info->switch_64 = 0; //not convert from elf64 > + info->version = "unknown"; > +} > + > +static void parse_elf64_kernel(struct kernel_info *info, char *kernel_buf, > size_t kernel_size) > +{ > + Elf64_Ehdr *ehdr; > + Elf64_Phdr *phdr; > + int i; > + int phdrs; > + ehdr = (Elf64_Ehdr *)kernel_buf; > + phdr = (Elf64_Phdr *)(kernel_buf + le64_to_cpu(ehdr->e_phoff)); > + > + phdrs = 0; > + for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) { > + if (le32_to_cpu(phdr[i].p_type) != PT_LOAD) > + continue; > + info->kernel[phdrs] = kernel_buf + > le64_to_cpu(phdr[i].p_offset); > + info->filesz[phdrs] = le64_to_cpu(phdr[i].p_filesz); > + info->memsz[phdrs] = le64_to_cpu(phdr[i].p_memsz); > + info->paddr[phdrs] = le64_to_cpu(phdr[i].p_paddr) & 0xffffff; > + info->vaddr[phdrs] = le64_to_cpu(phdr[i].p_vaddr); > + phdrs++; > } > + > + if(!phdrs) > + die("We need at least one phdr\n"); > > - info->entry = 0x100000; > - info->version = "unknown"; > + info->phdrs = phdrs; > + info->entry = le64_to_cpu(ehdr->e_entry); > +#if 0 > + if (info->entry != info->paddr[0]) { > + info->entry = info->paddr[0]; // we still have startup_32 there > + info->switch_64 = 0; //not convert from elf64 > + } else > +#endif > + info->switch_64 = 1; //convert from elf64 > + > + info->version = "unknown"; > } > > + > static void parse_bzImage_kernel(struct kernel_info *info, char *kernel_buf, > size_t kernel_size) > { > struct x86_linux_header *hdr; > @@ -186,12 +249,14 @@ > } > offset = 512 + (512 *setup_sects); > > - info->kernel = kernel_buf + offset; > - info->filesz = kernel_size - offset; > - info->memsz = 0x700000; > - info->paddr = 0x100000; > - info->vaddr = 0x100000; > - info->entry = info->paddr; > + info->kernel[0] = kernel_buf + offset; > + info->filesz[0] = kernel_size - offset; > + info->memsz[0] = 0x700000; > + info->paddr[0] = 0x100000; > + info->vaddr[0] = 0x100000; > + info->phdrs = 1; > + info->entry = info->paddr[0]; > + info->switch_64 = 0; //not convert from elf64, even later bzImage > become elf64, it still includes startup_32 > info->version = kernel_buf + 512 + le16_to_cpu(hdr->kver_addr); > } > > @@ -237,6 +302,7 @@ > struct kernel_info kinfo; > struct image_parameters *params; > int index; > + int i; > > int opt; > static const struct option options[] = { > @@ -310,7 +376,7 @@ > > /* Add a program header for the note section */ > index = 4; > - index += kinfo.kernel2 ? 1:0; > + index += (kinfo.phdrs - 1); > index += ramdisk_size ? 1:0; > phdr = add_program_headers(ehdr, index); > > @@ -328,23 +394,24 @@ > phdr[2].p_paddr = REAL_MODE_DATA_LOC; > phdr[2].p_vaddr = REAL_MODE_DATA_LOC; > phdr[2].p_filesz = 0; > - phdr[2].p_memsz = (GDTLOC - REAL_MODE_DATA_LOC) + params->gdt_size; > + if(!kinfo.switch_64) > + phdr[2].p_memsz = (GDTLOC - REAL_MODE_DATA_LOC) + > params->gdt_size; > + else > + phdr[2].p_memsz = (PGTLOC - REAL_MODE_DATA_LOC) + > params->pgt_size; > phdr[2].p_data = 0; > > - phdr[3].p_paddr = kinfo.paddr; > - phdr[3].p_vaddr = kinfo.vaddr; > - phdr[3].p_filesz = kinfo.filesz; > - phdr[3].p_memsz = kinfo.memsz; > - phdr[3].p_data = kinfo.kernel; > + if( (phdr[1].p_paddr + phdr[1].p_memsz) > phdr[2].p_paddr) { > + die("Internal error: need to increase REAL_MODE_DATA_LOC !\n"); > + } > > - index = 4; > + index = 3; > /* Put the second kernel frament if present */ > - if (kinfo.kernel2) { > - phdr[index].p_paddr = kinfo.paddr2; > - phdr[index].p_vaddr = kinfo.vaddr2; > - phdr[index].p_filesz = kinfo.filesz2; > - phdr[index].p_memsz = kinfo.memsz2; > - phdr[index].p_data = kinfo.kernel2; > + for(i=0;i<kinfo.phdrs;i++) { > + phdr[index].p_paddr = kinfo.paddr[i]; > + phdr[index].p_vaddr = kinfo.vaddr[i]; > + phdr[index].p_filesz = kinfo.filesz[i]; > + phdr[index].p_memsz = kinfo.memsz[i]; > + phdr[index].p_data = kinfo.kernel[i]; > index++; > } > > @@ -352,6 +419,10 @@ > */ > params->initrd_start = params->initrd_size = 0; > if (ramdisk_size) { > + if( (phdr[index-1].p_paddr + phdr[index-1].p_memsz) > > ramdisk_base) { > + die("need to increase increase ramdisk_base !\n"); > + } > + > phdr[index].p_paddr = ramdisk_base; > phdr[index].p_vaddr = ramdisk_base; > phdr[index].p_filesz = ramdisk_size; > @@ -364,6 +435,7 @@ > > /* Set the start location */ > params->entry = kinfo.entry; > + params->switch_64 = kinfo.switch_64; > ehdr->e_entry = phdr[1].p_paddr; > > /* Setup the elf notes */ > diff -uNr mkelfImage-2.7/linux-ia64/mkelf-linux-ia64.c > mkelfImage-2.7.new/linux-ia64/mkelf-linux-ia64.c > --- mkelfImage-2.7/linux-ia64/mkelf-linux-ia64.c 2006-03-17 > 10:09:16.000000000 -0800 > +++ mkelfImage-2.7.new/linux-ia64/mkelf-linux-ia64.c 2006-11-07 > 18:14:27.000000000 -0800 > @@ -81,7 +81,7 @@ > phdr = (Elf64_Phdr *)(kernel_buf + le64_to_cpu(ehdr->e_phoff)); > phdrs = 0; > for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) { > - if (le16_to_cpu(phdr[i].p_type) != PT_LOAD) > + if (le32_to_cpu(phdr[i].p_type) != PT_LOAD) > continue; > phdrs++; > } > -- > linuxbios mailing list > linuxbios@linuxbios.org > http://www.linuxbios.org/mailman/listinfo/linuxbios -- Jordan Crouse Systems Software Development Engineer Advanced Micro Devices, Inc. -- linuxbios mailing list linuxbios@linuxbios.org http://www.linuxbios.org/mailman/listinfo/linuxbios