Tested and it works fine!
Thx Richard!
-of
Richard Henderson schrieb:
> Recent build changes have added a PT_NOTE entry to the kernel's
> ELF header. A perfectly valid change, but Alpha's aboot loader
> is none too bright about examining these headers.
>
> The following patch to aboot-1.0_pre20040408.tar.bz2 makes it
> so that only PT_LOAD entries are considered for loading, as well
> as several other changes required to get the damned thing to
> build again.
>
>
> r~
>
>
> diff -rup aboot-1.0_pre20040408/Makefile aboot-local/Makefile
> --- aboot-1.0_pre20040408/Makefile 2004-04-08 08:19:01.000000000 -0700
> +++ aboot-local/Makefile 2007-08-13 16:08:01.000000000 -0700
> @@ -32,15 +32,15 @@ export
> #
> LOADADDR = 20000000
>
> -ABOOT_LDFLAGS = -static -N -Taboot.lds
> +ABOOT_LDFLAGS = -static -N -Taboot.lds --relax
>
> CC = gcc
> TOP = $(shell pwd)
> ifeq ($(TESTING),)
> -CPPFLAGS = $(CFGDEFS) -I$(TOP)/include
> -CFLAGS = $(CPPFLAGS) -D__KERNEL__ -Os -Wall -fno-builtin -mno-fp-regs -ffixed-8
> +CPPFLAGS = $(CFGDEFS) -I$(TOP)/include -I$(KSRC)/include
> +CFLAGS = $(CPPFLAGS) -D__KERNEL__ -Os -Wall -fno-builtin -mno-fp-regs
> else
> -CPPFLAGS = -DTESTING $(CFGDEFS) -I$(TOP)/include
> +CPPFLAGS = -DTESTING $(CFGDEFS) -I$(TOP)/include -I$(KSRC)/include
> CFLAGS = $(CPPFLAGS) -O -g3 -Wall -D__KERNEL__ -ffixed-8
> endif
> ASFLAGS = $(CPPFLAGS)
> diff -rup aboot-1.0_pre20040408/aboot.c aboot-local/aboot.c
> --- aboot-1.0_pre20040408/aboot.c 2004-04-08 10:53:57.000000000 -0700
> +++ aboot-local/aboot.c 2007-08-13 15:46:33.000000000 -0700
> @@ -19,14 +19,13 @@
> * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> */
>
> -#include <linux/elf.h>
> #include <linux/kernel.h>
> #include <linux/version.h>
> -
> #include <asm/console.h>
> #include <asm/hwrpb.h>
> #include <asm/system.h>
>
> +#include <elf.h>
> #include <alloca.h>
> #include <errno.h>
>
> @@ -37,16 +36,6 @@
> #include "utils.h"
> #include "string.h"
>
> -#ifndef elf_check_arch
> -# define aboot_elf_check_arch(e) 1
> -#else
> -# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
> -# define aboot_elf_check_arch(e) elf_check_arch(e)
> -# else
> -# define aboot_elf_check_arch(e) elf_check_arch(e->e_machine)
> -# endif
> -#endif
> -
> struct bootfs * bfs = 0; /* filesystem to boot from */
> char * dest_addr = 0;
> jmp_buf jump_buffer;
> @@ -83,77 +72,86 @@ static unsigned long entry_addr = START_
> long
> first_block (const char *buf, long blocksize)
> {
> - struct elfhdr *elf;
> - struct elf_phdr *phdrs;
> + Elf64_Ehdr *elf;
> + Elf64_Phdr *phdrs;
> + int i, j;
>
> - elf = (struct elfhdr *) buf;
> + elf = (Elf64_Ehdr *) buf;
>
> - if (elf->e_ident[0] == 0x7f
> - && strncmp(elf->e_ident + 1, "ELF", 3) == 0)
> - {
> - int i;
> - /* looks like an ELF binary: */
> - if (elf->e_type != ET_EXEC) {
> - printf("aboot: not an executable ELF file\n");
> - return -1;
> - }
> - if (!aboot_elf_check_arch(elf)) {
> - printf("aboot: ELF executable not for this machine\n");
> - return -1;
> - }
> - if (elf->e_phoff + elf->e_phnum * sizeof(*phdrs) > (unsigned) blocksize) {
> - printf("aboot: "
> - "ELF program headers not in first block (%ld)\n",
> - (long) elf->e_phoff);
> + if (elf->e_ident[0] != 0x7f
> + || elf->e_ident[1] != 'E'
> + || elf->e_ident[2] != 'L'
> + || elf->e_ident[3] != 'F') {
> + /* Fail silently, it might be a compressed file */
> + return -1;
> + }
> + if (elf->e_ident[EI_CLASS] != ELFCLASS64
> + || elf->e_ident[EI_DATA] != ELFDATA2LSB
> + || elf->e_machine != EM_ALPHA) {
> + printf("aboot: ELF executable not for this machine\n");
> + return -1;
> + }
> +
> + /* Looks like an ELF binary. */
> + if (elf->e_type != ET_EXEC) {
> + printf("aboot: not an executable ELF file\n");
> + return -1;
> + }
> +
> + if (elf->e_phoff + elf->e_phnum * sizeof(*phdrs)
> + > (unsigned) blocksize) {
> + printf("aboot: ELF program headers not in first block (%ld)\n",
> + (long) elf->e_phoff);
> + return -1;
> + }
> +
> + phdrs = (struct elf_phdr *) (buf + elf->e_phoff);
> + chunks = malloc(sizeof(struct segment) * elf->e_phnum);
> + start_addr = phdrs[0].p_vaddr; /* assume they are sorted */
> + entry_addr = elf->e_entry;
> +
> + for (i = j = 0; i < elf->e_phnum; ++i) {
> + int status;
> +
> + if (phdrs[i].p_type != PT_LOAD)
> + continue;
> +
> + chunks[j].addr = phdrs[i].p_vaddr;
> + chunks[j].offset = phdrs[i].p_offset;
> + chunks[j].size = phdrs[i].p_filesz;
> + printf("aboot: PHDR %d vaddr %#lx offset %#lx size %#lx\n",
> + i, chunks[j].addr, chunks[j].offset, chunks[j].size);
> +
> + status = check_memory(chunks[j].addr, chunks[j].size);
> + if (status) {
> + printf("aboot: Can't load kernel.\n"
> + " Memory at %lx - %lx (PHDR %i) "
> + "is %s\n",
> + chunks[j].addr,
> + chunks[j].addr + chunks[j].size - 1,
> + i,
> + (status == -ENOMEM) ?
> + "Not Found" :
> + "Busy (Reserved)");
> return -1;
> }
> - phdrs = (struct elf_phdr *) (buf + elf->e_phoff);
> - chunks = malloc(sizeof(struct segment) * elf->e_phnum);
> - nchunks = elf->e_phnum;
> - start_addr = phdrs[0].p_vaddr; /* assume they are sorted */
> - entry_addr = elf->e_entry;
> -#ifdef DEBUG
> - printf("aboot: %d program headers, start address %#lx, entry %#lx\n",
> - nchunks, start_addr, entry_addr);
> -#endif
> - for (i = 0; i < elf->e_phnum; ++i) {
> - int status;
> -
> - chunks[i].addr = phdrs[i].p_vaddr;
> - chunks[i].offset = phdrs[i].p_offset;
> - chunks[i].size = phdrs[i].p_filesz;
> -#ifdef DEBUG
> - printf("aboot: segment %d vaddr %#lx offset %#lx size %#lx\n",
> - i, chunks[i].addr, chunks[i].offset, chunks[i].size);
> -#endif
> -
> -#ifndef TESTING
> - status = check_memory(chunks[i].addr, chunks[i].size);
> - if (status) {
> +
> + if (phdrs[i].p_memsz > phdrs[i].p_filesz) {
> + if (bss_size > 0) {
> printf("aboot: Can't load kernel.\n"
> - " Memory at %lx - %lx (chunk %i) "
> - "is %s\n",
> - chunks[i].addr,
> - chunks[i].addr + chunks[i].size - 1,
> - i,
> - (status == -ENOMEM) ?
> - "Not Found" :
> - "Busy (Reserved)");
> + " Multiple BSS segments"
> + " (PHDR %d)\n", i);
> return -1;
> }
> -#endif
> + bss_start = (char *) (phdrs[i].p_vaddr +
> + phdrs[i].p_filesz);
> + bss_size = phdrs[i].p_memsz - phdrs[i].p_filesz;
> }
> - bss_start = (char *) (phdrs[elf->e_phnum - 1].p_vaddr +
> - phdrs[elf->e_phnum - 1].p_filesz);
> - bss_size = (phdrs[elf->e_phnum - 1].p_memsz -
> - phdrs[elf->e_phnum - 1].p_filesz);
> -#ifdef DEBUG
> - printf("aboot: bss at 0x%p, size %#lx\n", bss_start, bss_size);
> -#endif
> - } else {
> - /* Fail silently, it might be a compressed file */
> - return -1;
> +
> + j++;
> }
> + nchunks = j;
> + printf("aboot: bss at 0x%p, size %#lx\n", bss_start, bss_size);
>
> return 0;
> }
> diff -rup aboot-1.0_pre20040408/aboot.lds aboot-local/aboot.lds
> --- aboot-1.0_pre20040408/aboot.lds 2001-10-08 16:03:50.000000000 -0700
> +++ aboot-local/aboot.lds 2007-08-13 15:59:46.000000000 -0700
> @@ -1,22 +1,25 @@
> OUTPUT_FORMAT("elf64-alpha")
> ENTRY(__start)
> +PHDRS { kernel PT_LOAD; }
> SECTIONS
> {
> . = 0x20000000;
> - .text : { *(.text) }
> + .text : { *(.text) } :kernel
> _etext = .;
> PROVIDE (etext = .);
> - .rodata : { *(.rodata) }
> - .data : { *(.data) CONSTRUCTORS }
> - .got : { *(.got) }
> - .sdata : { *(.sdata) }
> + .rodata : { *(.rodata*) } :kernel
> + .data : { *(.data*) } :kernel
> + .got : { *(.got) } :kernel
> + .sdata : { *(.sdata) } :kernel
> _edata = .;
> PROVIDE (edata = .);
> - .sbss : { *(.sbss) *(.scommon) }
> - .bss : { *(.bss) *(COMMON) }
> + .sbss : { *(.sbss) *(.scommon) } :kernel
> + .bss : { *(.bss) *(COMMON) } :kernel
> _end = . ;
> PROVIDE (end = .);
>
> + /DISCARD/ : { *(.eh_frame) }
> +
> .mdebug 0 : { *(.mdebug) }
> .note 0 : { *(.note) }
> .comment 0 : { *(.comment) }
> diff -rup aboot-1.0_pre20040408/cons.c aboot-local/cons.c
> --- aboot-1.0_pre20040408/cons.c 2003-11-30 19:56:34.000000000 -0800
> +++ aboot-local/cons.c 2007-08-13 15:48:45.000000000 -0700
> @@ -1,5 +1,3 @@
> -#include <alloca.h>
> -
> #include <linux/kernel.h>
>
> #include <asm/console.h>
> @@ -20,7 +18,7 @@
> #endif
>
> long cons_dev; /* console device */
> -extern long int dispatch(); /* Need the full 64 bit return here...*/
> +extern long int dispatch(long, ...); /* Need the full 64 bit return here...*/
>
> long
> cons_puts(const char *str, long len)
> @@ -82,7 +80,7 @@ cons_getenv(long index, char *envval, lo
> * allocated on the stack (which guaranteed to by 8 byte
> * aligned).
> */
> - char * tmp = alloca(maxlen);
> + char tmp[maxlen];
> long len;
>
> len = dispatch(CCB_GET_ENV, index, tmp, maxlen - 1);
> diff -rup aboot-1.0_pre20040408/disk.c aboot-local/disk.c
> --- aboot-1.0_pre20040408/disk.c 2004-04-08 11:14:06.000000000 -0700
> +++ aboot-local/disk.c 2007-08-13 15:50:22.000000000 -0700
> @@ -113,7 +113,7 @@ int
> load_uncompressed (int fd)
> {
> long nread, nblocks;
> - unsigned char *buf;
> + char *buf;
> int i;
>
> buf = malloc(bfs->blocksize);
> @@ -131,7 +131,7 @@ load_uncompressed (int fd)
>
> for(i = 0; i < 16; i++) {
> for (j = 0; j < 16; j++)
> - printf("%02X ", buf[j+16*i]);
> + printf("%02X ", (unsigned char) buf[j+16*i]);
> for(j = 0; j < 16; j++) {
> c = buf[j+16*i];
> printf("%c", (c >= ' ') ? c : ' ');
> diff -rup aboot-1.0_pre20040408/head.S aboot-local/head.S
> --- aboot-1.0_pre20040408/head.S 2001-10-08 16:03:51.000000000 -0700
> +++ aboot-local/head.S 2007-08-13 16:03:57.000000000 -0700
> @@ -19,8 +19,7 @@ __start:
> .quad 0,0,0,0,0,0,0,0
> 1: br $27,2f
> 2: ldgp $29,0($27)
> - lda $27,main_
> - jsr $26,($27),main_
> + bsr $26,main_ !samegp
> call_pal PAL_halt
> .end __start
>
> @@ -170,4 +169,4 @@ run_kernel:
> mov $16,$27
> mov $17,$30
> jmp $31,($27)
> - .end run_kernel
> \ No newline at end of file
> + .end run_kernel
>
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