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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/boot
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!
Diffstat (limited to 'arch/mips/boot')
-rw-r--r--arch/mips/boot/Makefile49
-rw-r--r--arch/mips/boot/addinitrd.c131
-rw-r--r--arch/mips/boot/ecoff.h62
-rw-r--r--arch/mips/boot/elf2ecoff.c616
4 files changed, 858 insertions, 0 deletions
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
new file mode 100644
index 000000000000..efbeac326815
--- /dev/null
+++ b/arch/mips/boot/Makefile
@@ -0,0 +1,49 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1995, 1998, 2001, 2002 by Ralf Baechle
+# Copyright (C) 2004 Maciej W. Rozycki
+#
+
+#
+# Some DECstations need all possible sections of an ECOFF executable
+#
+ifdef CONFIG_MACH_DECSTATION
+ E2EFLAGS = -a
+else
+ E2EFLAGS =
+endif
+
+#
+# Drop some uninteresting sections in the kernel.
+# This is only relevant for ELF kernels but doesn't hurt a.out
+#
+drop-sections = .reginfo .mdebug .comment .note .pdr .options .MIPS.options
+strip-flags = $(addprefix --remove-section=,$(drop-sections))
+
+VMLINUX = vmlinux
+
+all: vmlinux.ecoff vmlinux.srec addinitrd
+
+vmlinux.ecoff: $(obj)/elf2ecoff $(VMLINUX)
+ $(obj)/elf2ecoff $(VMLINUX) vmlinux.ecoff $(E2EFLAGS)
+
+$(obj)/elf2ecoff: $(obj)/elf2ecoff.c
+ $(HOSTCC) -o $@ $^
+
+vmlinux.srec: $(VMLINUX)
+ $(OBJCOPY) -S -O srec $(strip-flags) $(VMLINUX) $(obj)/vmlinux.srec
+
+$(obj)/addinitrd: $(obj)/addinitrd.c
+ $(HOSTCC) -o $@ $^
+
+archhelp:
+ @echo '* vmlinux.ecoff - ECOFF boot image'
+ @echo '* vmlinux.srec - SREC boot image'
+
+clean-files += addinitrd \
+ elf2ecoff \
+ vmlinux.ecoff \
+ vmlinux.srec
diff --git a/arch/mips/boot/addinitrd.c b/arch/mips/boot/addinitrd.c
new file mode 100644
index 000000000000..8b3033304770
--- /dev/null
+++ b/arch/mips/boot/addinitrd.c
@@ -0,0 +1,131 @@
+/*
+ * addinitrd - program to add a initrd image to an ecoff kernel
+ *
+ * (C) 1999 Thomas Bogendoerfer
+ * minor modifications, cleanup: Guido Guenther <agx@sigxcpu.org>
+ * further cleanup: Maciej W. Rozycki
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <netinet/in.h>
+
+#include "ecoff.h"
+
+#define MIPS_PAGE_SIZE 4096
+#define MIPS_PAGE_MASK (MIPS_PAGE_SIZE-1)
+
+#define swab16(x) \
+ ((unsigned short)( \
+ (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
+ (((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
+
+#define swab32(x) \
+ ((unsigned int)( \
+ (((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
+ (((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
+ (((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
+ (((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
+
+#define SWAB(a) (swab ? swab32(a) : (a))
+
+void die (char *s)
+{
+ perror (s);
+ exit (1);
+}
+
+int main (int argc, char *argv[])
+{
+ int fd_vmlinux,fd_initrd,fd_outfile;
+ FILHDR efile;
+ AOUTHDR eaout;
+ SCNHDR esecs[3];
+ struct stat st;
+ char buf[1024];
+ unsigned long loadaddr;
+ unsigned long initrd_header[2];
+ int i,cnt;
+ int swab = 0;
+
+ if (argc != 4) {
+ printf ("Usage: %s <vmlinux> <initrd> <outfile>\n",argv[0]);
+ exit (1);
+ }
+
+ if ((fd_vmlinux = open (argv[1],O_RDONLY)) < 0)
+ die ("open vmlinux");
+ if (read (fd_vmlinux, &efile, sizeof efile) != sizeof efile)
+ die ("read file header");
+ if (read (fd_vmlinux, &eaout, sizeof eaout) != sizeof eaout)
+ die ("read aout header");
+ if (read (fd_vmlinux, esecs, sizeof esecs) != sizeof esecs)
+ die ("read section headers");
+ /*
+ * check whether the file is good for us
+ */
+ /* TBD */
+
+ /*
+ * check, if we have to swab words
+ */
+ if (ntohs(0xaa55) == 0xaa55) {
+ if (efile.f_magic == swab16(MIPSELMAGIC))
+ swab = 1;
+ } else {
+ if (efile.f_magic == swab16(MIPSEBMAGIC))
+ swab = 1;
+ }
+
+ /* make sure we have an empty data segment for the initrd */
+ if (eaout.dsize || esecs[1].s_size) {
+ fprintf (stderr, "Data segment not empty. Giving up!\n");
+ exit (1);
+ }
+ if ((fd_initrd = open (argv[2], O_RDONLY)) < 0)
+ die ("open initrd");
+ if (fstat (fd_initrd, &st) < 0)
+ die ("fstat initrd");
+ loadaddr = ((SWAB(esecs[2].s_vaddr) + SWAB(esecs[2].s_size)
+ + MIPS_PAGE_SIZE-1) & ~MIPS_PAGE_MASK) - 8;
+ if (loadaddr < (SWAB(esecs[2].s_vaddr) + SWAB(esecs[2].s_size)))
+ loadaddr += MIPS_PAGE_SIZE;
+ initrd_header[0] = SWAB(0x494E5244);
+ initrd_header[1] = SWAB(st.st_size);
+ eaout.dsize = esecs[1].s_size = initrd_header[1] = SWAB(st.st_size+8);
+ eaout.data_start = esecs[1].s_vaddr = esecs[1].s_paddr = SWAB(loadaddr);
+
+ if ((fd_outfile = open (argv[3], O_RDWR|O_CREAT|O_TRUNC,0666)) < 0)
+ die ("open outfile");
+ if (write (fd_outfile, &efile, sizeof efile) != sizeof efile)
+ die ("write file header");
+ if (write (fd_outfile, &eaout, sizeof eaout) != sizeof eaout)
+ die ("write aout header");
+ if (write (fd_outfile, esecs, sizeof esecs) != sizeof esecs)
+ die ("write section headers");
+ /* skip padding */
+ if(lseek(fd_vmlinux, SWAB(esecs[0].s_scnptr), SEEK_SET) == (off_t)-1)
+ die ("lseek vmlinux");
+ if(lseek(fd_outfile, SWAB(esecs[0].s_scnptr), SEEK_SET) == (off_t)-1)
+ die ("lseek outfile");
+ /* copy text segment */
+ cnt = SWAB(eaout.tsize);
+ while (cnt) {
+ if ((i = read (fd_vmlinux, buf, sizeof buf)) <= 0)
+ die ("read vmlinux");
+ if (write (fd_outfile, buf, i) != i)
+ die ("write vmlinux");
+ cnt -= i;
+ }
+ if (write (fd_outfile, initrd_header, sizeof initrd_header) != sizeof initrd_header)
+ die ("write initrd header");
+ while ((i = read (fd_initrd, buf, sizeof buf)) > 0)
+ if (write (fd_outfile, buf, i) != i)
+ die ("write initrd");
+ close (fd_vmlinux);
+ close (fd_initrd);
+ return 0;
+}
diff --git a/arch/mips/boot/ecoff.h b/arch/mips/boot/ecoff.h
new file mode 100644
index 000000000000..8c3eed2877f2
--- /dev/null
+++ b/arch/mips/boot/ecoff.h
@@ -0,0 +1,62 @@
+/*
+ * Some ECOFF definitions.
+ */
+typedef struct filehdr {
+ unsigned short f_magic; /* magic number */
+ unsigned short f_nscns; /* number of sections */
+ long f_timdat; /* time & date stamp */
+ long f_symptr; /* file pointer to symbolic header */
+ long f_nsyms; /* sizeof(symbolic hdr) */
+ unsigned short f_opthdr; /* sizeof(optional hdr) */
+ unsigned short f_flags; /* flags */
+} FILHDR;
+#define FILHSZ sizeof(FILHDR)
+
+#define OMAGIC 0407
+#define MIPSEBMAGIC 0x160
+#define MIPSELMAGIC 0x162
+
+typedef struct scnhdr {
+ char s_name[8]; /* section name */
+ long s_paddr; /* physical address, aliased s_nlib */
+ long s_vaddr; /* virtual address */
+ long s_size; /* section size */
+ long s_scnptr; /* file ptr to raw data for section */
+ long s_relptr; /* file ptr to relocation */
+ long s_lnnoptr; /* file ptr to gp histogram */
+ unsigned short s_nreloc; /* number of relocation entries */
+ unsigned short s_nlnno; /* number of gp histogram entries */
+ long s_flags; /* flags */
+} SCNHDR;
+#define SCNHSZ sizeof(SCNHDR)
+#define SCNROUND ((long)16)
+
+typedef struct aouthdr {
+ short magic; /* see above */
+ short vstamp; /* version stamp */
+ long tsize; /* text size in bytes, padded to DW bdry*/
+ long dsize; /* initialized data " " */
+ long bsize; /* uninitialized data " " */
+ long entry; /* entry pt. */
+ long text_start; /* base of text used for this file */
+ long data_start; /* base of data used for this file */
+ long bss_start; /* base of bss used for this file */
+ long gprmask; /* general purpose register mask */
+ long cprmask[4]; /* co-processor register masks */
+ long gp_value; /* the gp value used for this object */
+} AOUTHDR;
+#define AOUTHSZ sizeof(AOUTHDR)
+
+#define OMAGIC 0407
+#define NMAGIC 0410
+#define ZMAGIC 0413
+#define SMAGIC 0411
+#define LIBMAGIC 0443
+
+#define N_TXTOFF(f, a) \
+ ((a).magic == ZMAGIC || (a).magic == LIBMAGIC ? 0 : \
+ ((a).vstamp < 23 ? \
+ ((FILHSZ + AOUTHSZ + (f).f_nscns * SCNHSZ + 7) & 0xfffffff8) : \
+ ((FILHSZ + AOUTHSZ + (f).f_nscns * SCNHSZ + SCNROUND-1) & ~(SCNROUND-1)) ) )
+#define N_DATOFF(f, a) \
+ N_TXTOFF(f, a) + (a).tsize;
diff --git a/arch/mips/boot/elf2ecoff.c b/arch/mips/boot/elf2ecoff.c
new file mode 100644
index 000000000000..c3543d9eb266
--- /dev/null
+++ b/arch/mips/boot/elf2ecoff.c
@@ -0,0 +1,616 @@
+/*
+ * Copyright (c) 1995
+ * Ted Lemon (hereinafter referred to as the author)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* elf2ecoff.c
+
+ This program converts an elf executable to an ECOFF executable.
+ No symbol table is retained. This is useful primarily in building
+ net-bootable kernels for machines (e.g., DECstation and Alpha) which
+ only support the ECOFF object file format. */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <elf.h>
+#include <limits.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+
+#include "ecoff.h"
+
+/*
+ * Some extra ELF definitions
+ */
+#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
+
+/* -------------------------------------------------------------------- */
+
+struct sect {
+ unsigned long vaddr;
+ unsigned long len;
+};
+
+int *symTypeTable;
+int must_convert_endian = 0;
+int format_bigendian = 0;
+
+static void copy(int out, int in, off_t offset, off_t size)
+{
+ char ibuf[4096];
+ int remaining, cur, count;
+
+ /* Go to the start of the ELF symbol table... */
+ if (lseek(in, offset, SEEK_SET) < 0) {
+ perror("copy: lseek");
+ exit(1);
+ }
+
+ remaining = size;
+ while (remaining) {
+ cur = remaining;
+ if (cur > sizeof ibuf)
+ cur = sizeof ibuf;
+ remaining -= cur;
+ if ((count = read(in, ibuf, cur)) != cur) {
+ fprintf(stderr, "copy: read: %s\n",
+ count ? strerror(errno) :
+ "premature end of file");
+ exit(1);
+ }
+ if ((count = write(out, ibuf, cur)) != cur) {
+ perror("copy: write");
+ exit(1);
+ }
+ }
+}
+
+/*
+ * Combine two segments, which must be contiguous. If pad is true, it's
+ * okay for there to be padding between.
+ */
+static void combine(struct sect *base, struct sect *new, int pad)
+{
+ if (!base->len)
+ *base = *new;
+ else if (new->len) {
+ if (base->vaddr + base->len != new->vaddr) {
+ if (pad)
+ base->len = new->vaddr - base->vaddr;
+ else {
+ fprintf(stderr,
+ "Non-contiguous data can't be converted.\n");
+ exit(1);
+ }
+ }
+ base->len += new->len;
+ }
+}
+
+static int phcmp(const void *v1, const void *v2)
+{
+ const Elf32_Phdr *h1 = v1;
+ const Elf32_Phdr *h2 = v2;
+
+ if (h1->p_vaddr > h2->p_vaddr)
+ return 1;
+ else if (h1->p_vaddr < h2->p_vaddr)
+ return -1;
+ else
+ return 0;
+}
+
+static char *saveRead(int file, off_t offset, off_t len, char *name)
+{
+ char *tmp;
+ int count;
+ off_t off;
+ if ((off = lseek(file, offset, SEEK_SET)) < 0) {
+ fprintf(stderr, "%s: fseek: %s\n", name, strerror(errno));
+ exit(1);
+ }
+ if (!(tmp = (char *) malloc(len))) {
+ fprintf(stderr, "%s: Can't allocate %ld bytes.\n", name,
+ len);
+ exit(1);
+ }
+ count = read(file, tmp, len);
+ if (count != len) {
+ fprintf(stderr, "%s: read: %s.\n",
+ name,
+ count ? strerror(errno) : "End of file reached");
+ exit(1);
+ }
+ return tmp;
+}
+
+#define swab16(x) \
+ ((unsigned short)( \
+ (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
+ (((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
+
+#define swab32(x) \
+ ((unsigned int)( \
+ (((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
+ (((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
+ (((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
+ (((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
+
+static void convert_elf_hdr(Elf32_Ehdr * e)
+{
+ e->e_type = swab16(e->e_type);
+ e->e_machine = swab16(e->e_machine);
+ e->e_version = swab32(e->e_version);
+ e->e_entry = swab32(e->e_entry);
+ e->e_phoff = swab32(e->e_phoff);
+ e->e_shoff = swab32(e->e_shoff);
+ e->e_flags = swab32(e->e_flags);
+ e->e_ehsize = swab16(e->e_ehsize);
+ e->e_phentsize = swab16(e->e_phentsize);
+ e->e_phnum = swab16(e->e_phnum);
+ e->e_shentsize = swab16(e->e_shentsize);
+ e->e_shnum = swab16(e->e_shnum);
+ e->e_shstrndx = swab16(e->e_shstrndx);
+}
+
+static void convert_elf_phdrs(Elf32_Phdr * p, int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++, p++) {
+ p->p_type = swab32(p->p_type);
+ p->p_offset = swab32(p->p_offset);
+ p->p_vaddr = swab32(p->p_vaddr);
+ p->p_paddr = swab32(p->p_paddr);
+ p->p_filesz = swab32(p->p_filesz);
+ p->p_memsz = swab32(p->p_memsz);
+ p->p_flags = swab32(p->p_flags);
+ p->p_align = swab32(p->p_align);
+ }
+
+}
+
+static void convert_elf_shdrs(Elf32_Shdr * s, int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++, s++) {
+ s->sh_name = swab32(s->sh_name);
+ s->sh_type = swab32(s->sh_type);
+ s->sh_flags = swab32(s->sh_flags);
+ s->sh_addr = swab32(s->sh_addr);
+ s->sh_offset = swab32(s->sh_offset);
+ s->sh_size = swab32(s->sh_size);
+ s->sh_link = swab32(s->sh_link);
+ s->sh_info = swab32(s->sh_info);
+ s->sh_addralign = swab32(s->sh_addralign);
+ s->sh_entsize = swab32(s->sh_entsize);
+ }
+}
+
+static void convert_ecoff_filehdr(struct filehdr *f)
+{
+ f->f_magic = swab16(f->f_magic);
+ f->f_nscns = swab16(f->f_nscns);
+ f->f_timdat = swab32(f->f_timdat);
+ f->f_symptr = swab32(f->f_symptr);
+ f->f_nsyms = swab32(f->f_nsyms);
+ f->f_opthdr = swab16(f->f_opthdr);
+ f->f_flags = swab16(f->f_flags);
+}
+
+static void convert_ecoff_aouthdr(struct aouthdr *a)
+{
+ a->magic = swab16(a->magic);
+ a->vstamp = swab16(a->vstamp);
+ a->tsize = swab32(a->tsize);
+ a->dsize = swab32(a->dsize);
+ a->bsize = swab32(a->bsize);
+ a->entry = swab32(a->entry);
+ a->text_start = swab32(a->text_start);
+ a->data_start = swab32(a->data_start);
+ a->bss_start = swab32(a->bss_start);
+ a->gprmask = swab32(a->gprmask);
+ a->cprmask[0] = swab32(a->cprmask[0]);
+ a->cprmask[1] = swab32(a->cprmask[1]);
+ a->cprmask[2] = swab32(a->cprmask[2]);
+ a->cprmask[3] = swab32(a->cprmask[3]);
+ a->gp_value = swab32(a->gp_value);
+}
+
+static void convert_ecoff_esecs(struct scnhdr *s, int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++, s++) {
+ s->s_paddr = swab32(s->s_paddr);
+ s->s_vaddr = swab32(s->s_vaddr);
+ s->s_size = swab32(s->s_size);
+ s->s_scnptr = swab32(s->s_scnptr);
+ s->s_relptr = swab32(s->s_relptr);
+ s->s_lnnoptr = swab32(s->s_lnnoptr);
+ s->s_nreloc = swab16(s->s_nreloc);
+ s->s_nlnno = swab16(s->s_nlnno);
+ s->s_flags = swab32(s->s_flags);
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ Elf32_Ehdr ex;
+ Elf32_Phdr *ph;
+ Elf32_Shdr *sh;
+ char *shstrtab;
+ int i, pad;
+ struct sect text, data, bss;
+ struct filehdr efh;
+ struct aouthdr eah;
+ struct scnhdr esecs[6];
+ int infile, outfile;
+ unsigned long cur_vma = ULONG_MAX;
+ int addflag = 0;
+ int nosecs;
+
+ text.len = data.len = bss.len = 0;
+ text.vaddr = data.vaddr = bss.vaddr = 0;
+
+ /* Check args... */
+ if (argc < 3 || argc > 4) {
+ usage:
+ fprintf(stderr,
+ "usage: elf2ecoff <elf executable> <ecoff executable> [-a]\n");
+ exit(1);
+ }
+ if (argc == 4) {
+ if (strcmp(argv[3], "-a"))
+ goto usage;
+ addflag = 1;
+ }
+
+ /* Try the input file... */
+ if ((infile = open(argv[1], O_RDONLY)) < 0) {
+ fprintf(stderr, "Can't open %s for read: %s\n",
+ argv[1], strerror(errno));
+ exit(1);
+ }
+
+ /* Read the header, which is at the beginning of the file... */
+ i = read(infile, &ex, sizeof ex);
+ if (i != sizeof ex) {
+ fprintf(stderr, "ex: %s: %s.\n",
+ argv[1],
+ i ? strerror(errno) : "End of file reached");
+ exit(1);
+ }
+
+ if (ex.e_ident[EI_DATA] == ELFDATA2MSB)
+ format_bigendian = 1;
+
+ if (ntohs(0xaa55) == 0xaa55) {
+ if (!format_bigendian)
+ must_convert_endian = 1;
+ } else {
+ if (format_bigendian)
+ must_convert_endian = 1;
+ }
+ if (must_convert_endian)
+ convert_elf_hdr(&ex);
+
+ /* Read the program headers... */
+ ph = (Elf32_Phdr *) saveRead(infile, ex.e_phoff,
+ ex.e_phnum * sizeof(Elf32_Phdr),
+ "ph");
+ if (must_convert_endian)
+ convert_elf_phdrs(ph, ex.e_phnum);
+ /* Read the section headers... */
+ sh = (Elf32_Shdr *) saveRead(infile, ex.e_shoff,
+ ex.e_shnum * sizeof(Elf32_Shdr),
+ "sh");
+ if (must_convert_endian)
+ convert_elf_shdrs(sh, ex.e_shnum);
+ /* Read in the section string table. */
+ shstrtab = saveRead(infile, sh[ex.e_shstrndx].sh_offset,
+ sh[ex.e_shstrndx].sh_size, "shstrtab");
+
+ /* Figure out if we can cram the program header into an ECOFF
+ header... Basically, we can't handle anything but loadable
+ segments, but we can ignore some kinds of segments. We can't
+ handle holes in the address space. Segments may be out of order,
+ so we sort them first. */
+
+ qsort(ph, ex.e_phnum, sizeof(Elf32_Phdr), phcmp);
+
+ for (i = 0; i < ex.e_phnum; i++) {
+ /* Section types we can ignore... */
+ if (ph[i].p_type == PT_NULL || ph[i].p_type == PT_NOTE ||
+ ph[i].p_type == PT_PHDR
+ || ph[i].p_type == PT_MIPS_REGINFO)
+ continue;
+ /* Section types we can't handle... */
+ else if (ph[i].p_type != PT_LOAD) {
+ fprintf(stderr,
+ "Program header %d type %d can't be converted.\n",
+ ex.e_phnum, ph[i].p_type);
+ exit(1);
+ }
+ /* Writable (data) segment? */
+ if (ph[i].p_flags & PF_W) {
+ struct sect ndata, nbss;
+
+ ndata.vaddr = ph[i].p_vaddr;
+ ndata.len = ph[i].p_filesz;
+ nbss.vaddr = ph[i].p_vaddr + ph[i].p_filesz;
+ nbss.len = ph[i].p_memsz - ph[i].p_filesz;
+
+ combine(&data, &ndata, 0);
+ combine(&bss, &nbss, 1);
+ } else {
+ struct sect ntxt;
+
+ ntxt.vaddr = ph[i].p_vaddr;
+ ntxt.len = ph[i].p_filesz;
+
+ combine(&text, &ntxt, 0);
+ }
+ /* Remember the lowest segment start address. */
+ if (ph[i].p_vaddr < cur_vma)
+ cur_vma = ph[i].p_vaddr;
+ }
+
+ /* Sections must be in order to be converted... */
+ if (text.vaddr > data.vaddr || data.vaddr > bss.vaddr ||
+ text.vaddr + text.len > data.vaddr
+ || data.vaddr + data.len > bss.vaddr) {
+ fprintf(stderr,
+ "Sections ordering prevents a.out conversion.\n");
+ exit(1);
+ }
+
+ /* If there's a data section but no text section, then the loader
+ combined everything into one section. That needs to be the
+ text section, so just make the data section zero length following
+ text. */
+ if (data.len && !text.len) {
+ text = data;
+ data.vaddr = text.vaddr + text.len;
+ data.len = 0;
+ }
+
+ /* If there is a gap between text and data, we'll fill it when we copy
+ the data, so update the length of the text segment as represented in
+ a.out to reflect that, since a.out doesn't allow gaps in the program
+ address space. */
+ if (text.vaddr + text.len < data.vaddr)
+ text.len = data.vaddr - text.vaddr;
+
+ /* We now have enough information to cons up an a.out header... */
+ eah.magic = OMAGIC;
+ eah.vstamp = 200;
+ eah.tsize = text.len;
+ eah.dsize = data.len;
+ eah.bsize = bss.len;
+ eah.entry = ex.e_entry;
+ eah.text_start = text.vaddr;
+ eah.data_start = data.vaddr;
+ eah.bss_start = bss.vaddr;
+ eah.gprmask = 0xf3fffffe;
+ memset(&eah.cprmask, '\0', sizeof eah.cprmask);
+ eah.gp_value = 0; /* unused. */
+
+ if (format_bigendian)
+ efh.f_magic = MIPSEBMAGIC;
+ else
+ efh.f_magic = MIPSELMAGIC;
+ if (addflag)
+ nosecs = 6;
+ else
+ nosecs = 3;
+ efh.f_nscns = nosecs;
+ efh.f_timdat = 0; /* bogus */
+ efh.f_symptr = 0;
+ efh.f_nsyms = 0;
+ efh.f_opthdr = sizeof eah;
+ efh.f_flags = 0x100f; /* Stripped, not sharable. */
+
+ memset(esecs, 0, sizeof esecs);
+ strcpy(esecs[0].s_name, ".text");
+ strcpy(esecs[1].s_name, ".data");
+ strcpy(esecs[2].s_name, ".bss");
+ if (addflag) {
+ strcpy(esecs[3].s_name, ".rdata");
+ strcpy(esecs[4].s_name, ".sdata");
+ strcpy(esecs[5].s_name, ".sbss");
+ }
+ esecs[0].s_paddr = esecs[0].s_vaddr = eah.text_start;
+ esecs[1].s_paddr = esecs[1].s_vaddr = eah.data_start;
+ esecs[2].s_paddr = esecs[2].s_vaddr = eah.bss_start;
+ if (addflag) {
+ esecs[3].s_paddr = esecs[3].s_vaddr = 0;
+ esecs[4].s_paddr = esecs[4].s_vaddr = 0;
+ esecs[5].s_paddr = esecs[5].s_vaddr = 0;
+ }
+ esecs[0].s_size = eah.tsize;
+ esecs[1].s_size = eah.dsize;
+ esecs[2].s_size = eah.bsize;
+ if (addflag) {
+ esecs[3].s_size = 0;
+ esecs[4].s_size = 0;
+ esecs[5].s_size = 0;
+ }
+ esecs[0].s_scnptr = N_TXTOFF(efh, eah);
+ esecs[1].s_scnptr = N_DATOFF(efh, eah);
+#define ECOFF_SEGMENT_ALIGNMENT(a) 0x10
+#define ECOFF_ROUND(s,a) (((s)+(a)-1)&~((a)-1))
+ esecs[2].s_scnptr = esecs[1].s_scnptr +
+ ECOFF_ROUND(esecs[1].s_size, ECOFF_SEGMENT_ALIGNMENT(&eah));
+ if (addflag) {
+ esecs[3].s_scnptr = 0;
+ esecs[4].s_scnptr = 0;
+ esecs[5].s_scnptr = 0;
+ }
+ esecs[0].s_relptr = esecs[1].s_relptr = esecs[2].s_relptr = 0;
+ esecs[0].s_lnnoptr = esecs[1].s_lnnoptr = esecs[2].s_lnnoptr = 0;
+ esecs[0].s_nreloc = esecs[1].s_nreloc = esecs[2].s_nreloc = 0;
+ esecs[0].s_nlnno = esecs[1].s_nlnno = esecs[2].s_nlnno = 0;
+ if (addflag) {
+ esecs[3].s_relptr = esecs[4].s_relptr
+ = esecs[5].s_relptr = 0;
+ esecs[3].s_lnnoptr = esecs[4].s_lnnoptr
+ = esecs[5].s_lnnoptr = 0;
+ esecs[3].s_nreloc = esecs[4].s_nreloc = esecs[5].s_nreloc =
+ 0;
+ esecs[3].s_nlnno = esecs[4].s_nlnno = esecs[5].s_nlnno = 0;
+ }
+ esecs[0].s_flags = 0x20;
+ esecs[1].s_flags = 0x40;
+ esecs[2].s_flags = 0x82;
+ if (addflag) {
+ esecs[3].s_flags = 0x100;
+ esecs[4].s_flags = 0x200;
+ esecs[5].s_flags = 0x400;
+ }
+
+ /* Make the output file... */
+ if ((outfile = open(argv[2], O_WRONLY | O_CREAT, 0777)) < 0) {
+ fprintf(stderr, "Unable to create %s: %s\n", argv[2],
+ strerror(errno));
+ exit(1);
+ }
+
+ if (must_convert_endian)
+ convert_ecoff_filehdr(&efh);
+ /* Write the headers... */
+ i = write(outfile, &efh, sizeof efh);
+ if (i != sizeof efh) {
+ perror("efh: write");
+ exit(1);
+
+ for (i = 0; i < nosecs; i++) {
+ printf
+ ("Section %d: %s phys %lx size %lx file offset %lx\n",
+ i, esecs[i].s_name, esecs[i].s_paddr,
+ esecs[i].s_size, esecs[i].s_scnptr);
+ }
+ }
+ fprintf(stderr, "wrote %d byte file header.\n", i);
+
+ if (must_convert_endian)
+ convert_ecoff_aouthdr(&eah);
+ i = write(outfile, &eah, sizeof eah);
+ if (i != sizeof eah) {
+ perror("eah: write");
+ exit(1);
+ }
+ fprintf(stderr, "wrote %d byte a.out header.\n", i);
+
+ if (must_convert_endian)
+ convert_ecoff_esecs(&esecs[0], nosecs);
+ i = write(outfile, &esecs, nosecs * sizeof(struct scnhdr));
+ if (i != nosecs * sizeof(struct scnhdr)) {
+ perror("esecs: write");
+ exit(1);
+ }
+ fprintf(stderr, "wrote %d bytes of section headers.\n", i);
+
+ pad = (sizeof(efh) + sizeof(eah) + nosecs * sizeof(struct scnhdr)) & 15;
+ if (pad) {
+ pad = 16 - pad;
+ i = write(outfile, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0", pad);
+ if (i < 0) {
+ perror("ipad: write");
+ exit(1);
+ }
+ fprintf(stderr, "wrote %d byte pad.\n", i);
+ }
+
+ /*
+ * Copy the loadable sections. Zero-fill any gaps less than 64k;
+ * complain about any zero-filling, and die if we're asked to zero-fill
+ * more than 64k.
+ */
+ for (i = 0; i < ex.e_phnum; i++) {
+ /* Unprocessable sections were handled above, so just verify that
+ the section can be loaded before copying. */
+ if (ph[i].p_type == PT_LOAD && ph[i].p_filesz) {
+ if (cur_vma != ph[i].p_vaddr) {
+ unsigned long gap =
+ ph[i].p_vaddr - cur_vma;
+ char obuf[1024];
+ if (gap > 65536) {
+ fprintf(stderr,
+ "Intersegment gap (%ld bytes) too large.\n",
+ gap);
+ exit(1);
+ }
+ fprintf(stderr,
+ "Warning: %ld byte intersegment gap.\n",
+ gap);
+ memset(obuf, 0, sizeof obuf);
+ while (gap) {
+ int count =
+ write(outfile, obuf,
+ (gap >
+ sizeof obuf ? sizeof
+ obuf : gap));
+ if (count < 0) {
+ fprintf(stderr,
+ "Error writing gap: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+ gap -= count;
+ }
+ }
+ fprintf(stderr, "writing %d bytes...\n",
+ ph[i].p_filesz);
+ copy(outfile, infile, ph[i].p_offset,
+ ph[i].p_filesz);
+ cur_vma = ph[i].p_vaddr + ph[i].p_filesz;
+ }
+ }
+
+ /*
+ * Write a page of padding for boot PROMS that read entire pages.
+ * Without this, they may attempt to read past the end of the
+ * data section, incur an error, and refuse to boot.
+ */
+ {
+ char obuf[4096];
+ memset(obuf, 0, sizeof obuf);
+ if (write(outfile, obuf, sizeof(obuf)) != sizeof(obuf)) {
+ fprintf(stderr, "Error writing PROM padding: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+ }
+
+ /* Looks like we won... */
+ exit(0);
+}

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