powerpc: Make COFF zImages for old 32-bit powermacs

This adds code to build zImage.coff and/or zImage.initrd.coff when
CONFIG_PPC32 and CONFIG_PPC_PMAC are defined.  It also restructures
the OF client code and adds some workarounds for OF quirks on the
older machines.
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/boot/Makefile

@@ -25,8 +25,8 @@ HOSTCC		:= gcc
 BOOTCFLAGS	:= $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
 		   $(shell $(CROSS32CC) -print-file-name=include) -fPIC
 BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
-BOOTLFLAGS	:= -T $(srctree)/$(src)/zImage.lds
 OBJCOPYFLAGS    := contents,alloc,load,readonly,data
+OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
 
 zlib       := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c
 zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h
@@ -35,7 +35,7 @@ zliblinuxheader := zlib.h zconf.h zutil.h
 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
 
-src-boot := string.S prom.c main.c div64.S crt0.S
+src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
 src-boot += $(zlib)
 src-boot := $(addprefix $(obj)/, $(src-boot))
 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
@@ -70,7 +70,7 @@ quiet_cmd_bootas = BOOTAS  $@
       cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
 
 quiet_cmd_bootld = BOOTLD  $@
-      cmd_bootld = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(2)
+      cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
 
 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
 	$(call if_changed_dep,bootcc)
@@ -87,8 +87,10 @@ obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
 src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
 gz-sec  = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
 
-hostprogs-y		:= addnote addRamDisk
+hostprogs-y		:= addnote addRamDisk hack-coff
+
 targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
+	   zImage.coff zImage.initrd.coff \
 	   $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
 	   $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
 	   $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
@@ -114,6 +116,10 @@ quiet_cmd_addsection = ADDSEC  $@
 quiet_cmd_addnote = ADDNOTE $@
       cmd_addnote = $(obj)/addnote $@
 
+quiet_cmd_gencoff = COFF    $@
+      cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
+		    $(obj)/hack-coff $@
+
 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
 	$(call if_changed,gzip)
 
@@ -127,22 +133,35 @@ $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
 	$(call if_changed_dep,bootcc)
 	$(call cmd,addsection)
 
-$(obj)/zImage.vmode: obj-boot += $(call obj-sec, $(required))
+$(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
 $(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
-	$(call cmd,bootld,$(obj-boot))
+	$(call cmd,bootld,$(obj-boot),zImage.lds)
 
-$(obj)/zImage.initrd.vmode: obj-boot += $(call obj-sec, $(required) $(initrd))
+$(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
 $(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
-	$(call cmd,bootld,$(obj-boot))
+	$(call cmd,bootld,$(obj-boot),zImage.lds)
+
+# For 32-bit powermacs, build the COFF images as well as the ELF images.
+coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
+coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
 
-$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote
+$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y)
 	@cp -f $< $@
 	$(call if_changed,addnote)
 
-$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote
+$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote $(coffrdimg-y-y)
 	@cp -f $< $@
 	$(call if_changed,addnote)
 
+$(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
+	$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
+	$(call cmd,gencoff)
+
+$(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
+			   $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
+	$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
+	$(call cmd,gencoff)
+
 #-----------------------------------------------------------
 # build u-boot images
 #-----------------------------------------------------------

arch/powerpc/boot/crt0.S

@@ -12,17 +12,23 @@
 #include "ppc_asm.h"
 
 	.text
+	/* a procedure descriptor used when booting this as a COFF file */
+_zimage_start_opd:
+	.long	_zimage_start, 0, 0, 0
+
 	.globl	_zimage_start
 _zimage_start:
+	/* Work out the offset between the address we were linked at
+	   and the address where we're running. */
 	bl	1f
-
-1:
-	mflr	r0
+1:	mflr	r0
 	lis	r9,1b@ha
 	addi	r9,r9,1b@l
 	subf.	r0,r9,r0
-	beq	3f
+	beq	3f		/* if running at same address as linked */
 
+	/* The .got2 section contains a list of addresses, so add
+	   the address offset onto each entry. */
 	lis	r9,__got2_start@ha
 	addi	r9,r9,__got2_start@l
 	lis	r8,__got2_end@ha
@@ -32,15 +38,14 @@ _zimage_start:
 	srwi.	r8,r8,2
 	mtctr	r8
 	add	r9,r0,r9
-2:
-	lwz	r8,0(r9)
+2:	lwz	r8,0(r9)
 	add	r8,r8,r0
 	stw	r8,0(r9)
 	addi	r9,r9,4
 	bdnz	2b
 
-3:
-	lis	r9,_start@h
+	/* Do a cache flush for our text, in case OF didn't */
+3:	lis	r9,_start@h
 	add	r9,r0,r9
 	lis	r8,_etext@ha
 	addi	r8,r8,_etext@l

arch/powerpc/boot/hack-coff.c

+/*
+ * hack-coff.c - hack the header of an xcoff file to fill in
+ * a few fields needed by the Open Firmware xcoff loader on
+ * Power Macs but not initialized by objcopy.
+ *
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include "rs6000.h"
+
+#define AOUT_MAGIC	0x010b
+
+#define get_16be(x)	((((unsigned char *)(x))[0] << 8) \
+			 + ((unsigned char *)(x))[1])
+#define put_16be(x, v)	(((unsigned char *)(x))[0] = (v) >> 8, \
+			 ((unsigned char *)(x))[1] = (v) & 0xff)
+#define get_32be(x)	((((unsigned char *)(x))[0] << 24) \
+			 + (((unsigned char *)(x))[1] << 16) \
+			 + (((unsigned char *)(x))[2] << 8) \
+			 + ((unsigned char *)(x))[3])
+
+int
+main(int ac, char **av)
+{
+    int fd;
+    int i, nsect;
+    int aoutsz;
+    struct external_filehdr fhdr;
+    AOUTHDR aout;
+    struct external_scnhdr shdr;
+
+    if (ac != 2) {
+	fprintf(stderr, "Usage: hack-coff coff-file\n");
+	exit(1);
+    }
+    if ((fd = open(av[1], 2)) == -1) {
+	perror(av[2]);
+	exit(1);
+    }
+    if (read(fd, &fhdr, sizeof(fhdr)) != sizeof(fhdr))
+	goto readerr;
+    i = get_16be(fhdr.f_magic);
+    if (i != U802TOCMAGIC && i != U802WRMAGIC && i != U802ROMAGIC) {
+	fprintf(stderr, "%s: not an xcoff file\n", av[1]);
+	exit(1);
+    }
+    aoutsz = get_16be(fhdr.f_opthdr);
+    if (read(fd, &aout, aoutsz) != aoutsz)
+	goto readerr;
+    nsect = get_16be(fhdr.f_nscns);
+    for (i = 0; i < nsect; ++i) {
+	if (read(fd, &shdr, sizeof(shdr)) != sizeof(shdr))
+	    goto readerr;
+	if (strcmp(shdr.s_name, ".text") == 0) {
+	    put_16be(aout.o_snentry, i+1);
+	    put_16be(aout.o_sntext, i+1);
+	} else if (strcmp(shdr.s_name, ".data") == 0) {
+	    put_16be(aout.o_sndata, i+1);
+	} else if (strcmp(shdr.s_name, ".bss") == 0) {
+	    put_16be(aout.o_snbss, i+1);
+	}
+    }
+    put_16be(aout.magic, AOUT_MAGIC);
+    if (lseek(fd, (long) sizeof(struct external_filehdr), 0) == -1
+	|| write(fd, &aout, aoutsz) != aoutsz) {
+	fprintf(stderr, "%s: write error\n", av[1]);
+	exit(1);
+    }
+    close(fd);
+    exit(0);
+
+readerr:
+    fprintf(stderr, "%s: read error or file too short\n", av[1]);
+    exit(1);
+}

arch/powerpc/boot/main.c

@@ -21,8 +21,8 @@ extern void flush_cache(void *, unsigned long);
 
 
 /* Value picked to match that used by yaboot */
-#define PROG_START	0x01400000
-#define RAM_END		(512<<20) // Fixme: use OF */
+#define PROG_START	0x01400000	/* only used on 64-bit systems */
+#define RAM_END		(512<<20)	/* Fixme: use OF */
 #define	ONE_MB		0x100000
 
 extern char _start[];
@@ -160,6 +160,17 @@ static int is_elf64(void *hdr)
 	elfoffset = (unsigned long)elf64ph->p_offset;
 	vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
 	vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;
+
+#if defined(PROG_START)
+	/*
+	 * Maintain a "magic" minimum address. This keeps some older
+	 * firmware platforms running.
+	 */
+
+	if (claim_base < PROG_START)
+		claim_base = PROG_START;
+#endif
+
 	return 1;
 }
 
@@ -206,12 +217,18 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
 		exit();
 	if (getprop(chosen_handle, "stdout", &stdout, sizeof(stdout)) != 4)
 		exit();
-	stderr = stdout;
-	if (getprop(chosen_handle, "stdin", &stdin, sizeof(stdin)) != 4)
-		exit();
 
 	printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp);
 
+	/*
+	 * The first available claim_base must be above the end of the
+	 * the loaded kernel wrapper file (_start to _end includes the
+	 * initrd image if it is present) and rounded up to a nice
+	 * 1 MB boundary for good measure.
+	 */
+
+	claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
+
 	vmlinuz.addr = (unsigned long)_vmlinux_start;
 	vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
 
@@ -228,25 +245,6 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
 		exit();
 	}
 
-	/*
-	 * The first available claim_base must be above the end of the
-	 * the loaded kernel wrapper file (_start to _end includes the
-	 * initrd image if it is present) and rounded up to a nice
-	 * 1 MB boundary for good measure.
-	 */
-
-	claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
-
-#if defined(PROG_START)
-	/*
-	 * Maintain a "magic" minimum address. This keeps some older
-	 * firmware platforms running.
-	 */
-
-	if (claim_base < PROG_START)
-		claim_base = PROG_START;
-#endif
-
 	/* We need to claim the memsize plus the file offset since gzip
 	 * will expand the header (file offset), then the kernel, then
 	 * possible rubbish we don't care about. But the kernel bss must

arch/powerpc/boot/prom.h

 #ifndef _PPC_BOOT_PROM_H_
 #define _PPC_BOOT_PROM_H_
 
+typedef void *phandle;
+typedef void *ihandle;
+
 extern int (*prom) (void *);
-extern void *chosen_handle;
+extern phandle chosen_handle;
+extern ihandle stdout;
 
-extern void *stdin;
-extern void *stdout;
-extern void *stderr;
+int	call_prom(const char *service, int nargs, int nret, ...);
+int	call_prom_ret(const char *service, int nargs, int nret,
+		      unsigned int *rets, ...);
 
 extern int write(void *handle, void *ptr, int nb);
-extern int read(void *handle, void *ptr, int nb);
-extern void exit(void);
-extern void pause(void);
-extern void *finddevice(const char *);
-extern void *claim(unsigned long virt, unsigned long size, unsigned long align);
-extern int getprop(void *phandle, const char *name, void *buf, int buflen);
+extern void *claim(unsigned long virt, unsigned long size, unsigned long aln);
+
+static inline void exit(void)
+{
+	call_prom("exit", 0, 0);
+}
+
+static inline phandle finddevice(const char *name)
+{
+	return (phandle) call_prom("finddevice", 1, 1, name);
+}
+
+static inline int getprop(void *phandle, const char *name,
+			  void *buf, int buflen)
+{
+	return call_prom("getprop", 4, 1, phandle, name, buf, buflen);
+}
+
 #endif				/* _PPC_BOOT_PROM_H_ */

arch/powerpc/boot/rs6000.h

+/* IBM RS/6000 "XCOFF" file definitions for BFD.
+   Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+   FIXME: Can someone provide a transliteration of this name into ASCII?
+   Using the following chars caused a compiler warning on HIUX (so I replaced
+   them with octal escapes), and isn't useful without an understanding of what
+   character set it is.
+   Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM
+   and John Gilmore of Cygnus Support.  */
+
+/********************** FILE HEADER **********************/
+
+struct external_filehdr {
+	char f_magic[2];	/* magic number			*/
+	char f_nscns[2];	/* number of sections		*/
+	char f_timdat[4];	/* time & date stamp		*/
+	char f_symptr[4];	/* file pointer to symtab	*/
+	char f_nsyms[4];	/* number of symtab entries	*/
+	char f_opthdr[2];	/* sizeof(optional hdr)		*/
+	char f_flags[2];	/* flags			*/
+};
+
+        /* IBM RS/6000 */
+#define U802WRMAGIC     0730    /* writeable text segments **chh**      */
+#define U802ROMAGIC     0735    /* readonly sharable text segments      */
+#define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
+
+#define BADMAG(x)	\
+	((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
+	 (x).f_magic != U802TOCMAGIC)
+
+#define	FILHDR	struct external_filehdr
+#define	FILHSZ	20
+
+
+/********************** AOUT "OPTIONAL HEADER" **********************/
+
+
+typedef struct
+{
+  unsigned char	magic[2];	/* type of file			*/
+  unsigned char	vstamp[2];	/* version stamp		*/
+  unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry */
+  unsigned char	dsize[4];	/* initialized data "  "	*/
+  unsigned char	bsize[4];	/* uninitialized data "   "	*/
+  unsigned char	entry[4];	/* entry pt.			*/
+  unsigned char	text_start[4];	/* base of text used for this file */
+  unsigned char	data_start[4];	/* base of data used for this file */
+  unsigned char	o_toc[4];	/* address of TOC */
+  unsigned char	o_snentry[2];	/* section number of entry point */
+  unsigned char	o_sntext[2];	/* section number of .text section */
+  unsigned char	o_sndata[2];	/* section number of .data section */
+  unsigned char	o_sntoc[2];	/* section number of TOC */
+  unsigned char	o_snloader[2];	/* section number of .loader section */
+  unsigned char	o_snbss[2];	/* section number of .bss section */
+  unsigned char	o_algntext[2];	/* .text alignment */
+  unsigned char	o_algndata[2];	/* .data alignment */
+  unsigned char	o_modtype[2];	/* module type (??) */
+  unsigned char o_cputype[2];	/* cpu type */
+  unsigned char	o_maxstack[4];	/* max stack size (??) */
+  unsigned char o_maxdata[4];	/* max data size (??) */
+  unsigned char	o_resv2[12];	/* reserved */
+}
+AOUTHDR;
+
+#define AOUTSZ 72
+#define SMALL_AOUTSZ (28)
+#define AOUTHDRSZ 72
+
+#define	RS6K_AOUTHDR_OMAGIC	0x0107	/* old: text & data writeable */
+#define	RS6K_AOUTHDR_NMAGIC	0x0108	/* new: text r/o, data r/w */
+#define	RS6K_AOUTHDR_ZMAGIC	0x010B	/* paged: text r/o, both page-aligned */
+
+
+/********************** SECTION HEADER **********************/
+
+
+struct external_scnhdr {
+	char		s_name[8];	/* section name			*/
+	char		s_paddr[4];	/* physical address, aliased s_nlib */
+	char		s_vaddr[4];	/* virtual address		*/
+	char		s_size[4];	/* section size			*/
+	char		s_scnptr[4];	/* file ptr to raw data for section */
+	char		s_relptr[4];	/* file ptr to relocation	*/
+	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
+	char		s_nreloc[2];	/* number of relocation entries	*/
+	char		s_nlnno[2];	/* number of line number entries*/
+	char		s_flags[4];	/* flags			*/
+};
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT	".text"
+#define _DATA	".data"
+#define _BSS	".bss"
+#define _PAD	".pad"
+#define _LOADER	".loader"
+
+#define	SCNHDR	struct external_scnhdr
+#define	SCNHSZ	40
+
+/* XCOFF uses a special .loader section with type STYP_LOADER.  */
+#define STYP_LOADER 0x1000
+
+/* XCOFF uses a special .debug section with type STYP_DEBUG.  */
+#define STYP_DEBUG 0x2000
+
+/* XCOFF handles line number or relocation overflow by creating
+   another section header with STYP_OVRFLO set.  */
+#define STYP_OVRFLO 0x8000
+
+/********************** LINE NUMBERS **********************/
+
+/* 1 line number entry for every "breakpointable" source line in a section.
+ * Line numbers are grouped on a per function basis; first entry in a function
+ * grouping will have l_lnno = 0 and in place of physical address will be the
+ * symbol table index of the function name.
+ */
+struct external_lineno {
+	union {
+		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
+		char l_paddr[4];	/* (physical) address of line number	*/
+	} l_addr;
+	char l_lnno[2];	/* line number		*/
+};
+
+
+#define	LINENO	struct external_lineno
+#define	LINESZ	6
+
+
+/********************** SYMBOLS **********************/
+
+#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
+#define E_FILNMLEN	14	/* # characters in a file name		*/
+#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
+
+struct external_syment
+{
+  union {
+    char e_name[E_SYMNMLEN];
+    struct {
+      char e_zeroes[4];
+      char e_offset[4];
+    } e;
+  } e;
+  char e_value[4];
+  char e_scnum[2];
+  char e_type[2];
+  char e_sclass[1];
+  char e_numaux[1];
+};
+
+
+
+#define N_BTMASK	(017)
+#define N_TMASK		(060)
+#define N_BTSHFT	(4)
+#define N_TSHIFT	(2)
+
+
+union external_auxent {
+	struct {
+		char x_tagndx[4];	/* str, un, or enum tag indx */
+		union {
+			struct {
+			    char  x_lnno[2]; /* declaration line number */
+			    char  x_size[2]; /* str/union/array size */
+			} x_lnsz;
+			char x_fsize[4];	/* size of function */
+		} x_misc;
+		union {
+			struct {		/* if ISFCN, tag, or .bb */
+			    char x_lnnoptr[4];	/* ptr to fcn line # */
+			    char x_endndx[4];	/* entry ndx past block end */
+			} x_fcn;
+			struct {		/* if ISARY, up to 4 dimen. */
+			    char x_dimen[E_DIMNUM][2];
+			} x_ary;
+		} x_fcnary;
+		char x_tvndx[2];		/* tv index */
+	} x_sym;
+
+	union {
+		char x_fname[E_FILNMLEN];
+		struct {
+			char x_zeroes[4];
+			char x_offset[4];
+		} x_n;
+	} x_file;
+
+	struct {
+		char x_scnlen[4];			/* section length */
+		char x_nreloc[2];	/* # relocation entries */
+		char x_nlinno[2];	/* # line numbers */
+	} x_scn;
+
+        struct {
+		char x_tvfill[4];	/* tv fill value */
+		char x_tvlen[2];	/* length of .tv */
+		char x_tvran[2][2];	/* tv range */
+	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
+
+	struct {
+		unsigned char x_scnlen[4];
+		unsigned char x_parmhash[4];
+		unsigned char x_snhash[2];
+		unsigned char x_smtyp[1];
+		unsigned char x_smclas[1];
+		unsigned char x_stab[4];
+		unsigned char x_snstab[2];
+	} x_csect;
+
+};
+
+#define	SYMENT	struct external_syment
+#define	SYMESZ	18
+#define	AUXENT	union external_auxent
+#define	AUXESZ	18
+#define DBXMASK 0x80		/* for dbx storage mask */
+#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
+
+
+
+/********************** RELOCATION DIRECTIVES **********************/
+
+
+struct external_reloc {
+  char r_vaddr[4];
+  char r_symndx[4];
+  char r_size[1];
+  char r_type[1];
+};
+
+
+#define RELOC struct external_reloc
+#define RELSZ 10
+
+#define DEFAULT_DATA_SECTION_ALIGNMENT 4
+#define DEFAULT_BSS_SECTION_ALIGNMENT 4
+#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
+/* For new sections we havn't heard of before */
+#define DEFAULT_SECTION_ALIGNMENT 4

arch/powerpc/boot/stdio.c

+/*
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stdarg.h>
+#include <stddef.h>
+#include "string.h"
+#include "stdio.h"
+#include "prom.h"
+
+size_t strnlen(const char * s, size_t count)
+{
+	const char *sc;
+
+	for (sc = s; count-- && *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+extern unsigned int __div64_32(unsigned long long *dividend,
+			       unsigned int divisor);
+
+/* The unnecessary pointer compare is there
+ * to check for type safety (n must be 64bit)
+ */
+# define do_div(n,base) ({						\
+	unsigned int __base = (base);					\
+	unsigned int __rem;						\
+	(void)(((typeof((n)) *)0) == ((unsigned long long *)0));	\
+	if (((n) >> 32) == 0) {						\
+		__rem = (unsigned int)(n) % __base;			\
+		(n) = (unsigned int)(n) / __base;			\
+	} else								\
+		__rem = __div64_32(&(n), __base);			\
+	__rem;								\
+ })
+
+static int skip_atoi(const char **s)
+{
+	int i, c;
+
+	for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
+		i = i*10 + c - '0';
+	return i;
+}
+
+#define ZEROPAD	1		/* pad with zero */
+#define SIGN	2		/* unsigned/signed long */
+#define PLUS	4		/* show plus */
+#define SPACE	8		/* space if plus */
+#define LEFT	16		/* left justified */
+#define SPECIAL	32		/* 0x */
+#define LARGE	64		/* use 'ABCDEF' instead of 'abcdef' */
+
+static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
+{
+	char c,sign,tmp[66];
+	const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
+	int i;
+
+	if (type & LARGE)
+		digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+	if (type & LEFT)
+		type &= ~ZEROPAD;
+	if (base < 2 || base > 36)
+		return 0;
+	c = (type & ZEROPAD) ? '0' : ' ';
+	sign = 0;
+	if (type & SIGN) {
+		if ((signed long long)num < 0) {
+			sign = '-';
+			num = - (signed long long)num;
+			size--;
+		} else if (type & PLUS) {
+			sign = '+';
+			size--;
+		} else if (type & SPACE) {
+			sign = ' ';
+			size--;
+		}
+	}
+	if (type & SPECIAL) {
+		if (base == 16)
+			size -= 2;
+		else if (base == 8)
+			size--;
+	}
+	i = 0;
+	if (num == 0)
+		tmp[i++]='0';
+	else while (num != 0) {
+		tmp[i++] = digits[do_div(num, base)];
+	}
+	if (i > precision)
+		precision = i;
+	size -= precision;
+	if (!(type&(ZEROPAD+LEFT)))
+		while(size-->0)
+			*str++ = ' ';
+	if (sign)
+		*str++ = sign;
+	if (type & SPECIAL) {
+		if (base==8)
+			*str++ = '0';
+		else if (base==16) {
+			*str++ = '0';
+			*str++ = digits[33];
+		}
+	}
+	if (!(type & LEFT))
+		while (size-- > 0)
+			*str++ = c;
+	while (i < precision--)
+		*str++ = '0';
+	while (i-- > 0)
+		*str++ = tmp[i];
+	while (size-- > 0)
+		*str++ = ' ';
+	return str;
+}
+
+int vsprintf(char *buf, const char *fmt, va_list args)
+{
+	int len;
+	unsigned long long num;
+	int i, base;
+	char * str;
+	const char *s;
+
+	int flags;		/* flags to number() */
+
+	int field_width;	/* width of output field */
+	int precision;		/* min. # of digits for integers; max
+				   number of chars for from string */
+	int qualifier;		/* 'h', 'l', or 'L' for integer fields */
+	                        /* 'z' support added 23/7/1999 S.H.    */
+				/* 'z' changed to 'Z' --davidm 1/25/99 */
+
+	
+	for (str=buf ; *fmt ; ++fmt) {
+		if (*fmt != '%') {
+			*str++ = *fmt;
+			continue;
+		}
+			
+		/* process flags */
+		flags = 0;
+		repeat:
+			++fmt;		/* this also skips first '%' */
+			switch (*fmt) {
+				case '-': flags |= LEFT; goto repeat;
+				case '+': flags |= PLUS; goto repeat;
+				case ' ': flags |= SPACE; goto repeat;
+				case '#': flags |= SPECIAL; goto repeat;
+				case '0': flags |= ZEROPAD; goto repeat;
+				}
+		
+		/* get field width */
+		field_width = -1;
+		if ('0' <= *fmt && *fmt <= '9')
+			field_width = skip_atoi(&fmt);
+		else if (*fmt == '*') {
+			++fmt;
+			/* it's the next argument */
+			field_width = va_arg(args, int);
+			if (field_width < 0) {
+				field_width = -field_width;
+				flags |= LEFT;
+			}
+		}
+
+		/* get the precision */
+		precision = -1;
+		if (*fmt == '.') {
+			++fmt;	
+			if ('0' <= *fmt && *fmt <= '9')
+				precision = skip_atoi(&fmt);
+			else if (*fmt == '*') {
+				++fmt;
+				/* it's the next argument */
+				precision = va_arg(args, int);
+			}
+			if (precision < 0)
+				precision = 0;
+		}
+
+		/* get the conversion qualifier */
+		qualifier = -1;
+		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt =='Z') {
+			qualifier = *fmt;
+			++fmt;
+		}
+
+		/* default base */
+		base = 10;
+
+		switch (*fmt) {
+		case 'c':
+			if (!(flags & LEFT))
+				while (--field_width > 0)
+					*str++ = ' ';
+			*str++ = (unsigned char) va_arg(args, int);
+			while (--field_width > 0)
+				*str++ = ' ';
+			continue;
+
+		case 's':
+			s = va_arg(args, char *);
+			if (!s)
+				s = "<NULL>";
+
+			len = strnlen(s, precision);
+
+			if (!(flags & LEFT))
+				while (len < field_width--)
+					*str++ = ' ';
+			for (i = 0; i < len; ++i)
+				*str++ = *s++;
+			while (len < field_width--)
+				*str++ = ' ';
+			continue;
+
+		case 'p':
+			if (field_width == -1) {
+				field_width = 2*sizeof(void *);
+				flags |= ZEROPAD;
+			}
+			str = number(str,
+				(unsigned long) va_arg(args, void *), 16,
+				field_width, precision, flags);
+			continue;
+
+
+		case 'n':
+			if (qualifier == 'l') {
+				long * ip = va_arg(args, long *);
+				*ip = (str - buf);
+			} else if (qualifier == 'Z') {
+				size_t * ip = va_arg(args, size_t *);
+				*ip = (str - buf);
+			} else {
+				int * ip = va_arg(args, int *);
+				*ip = (str - buf);
+			}
+			continue;
+
+		case '%':
+			*str++ = '%';
+			continue;
+
+		/* integer number formats - set up the flags and "break" */
+		case 'o':
+			base = 8;
+			break;
+
+		case 'X':
+			flags |= LARGE;
+		case 'x':
+			base = 16;
+			break;
+
+		case 'd':
+		case 'i':
+			flags |= SIGN;
+		case 'u':
+			break;
+
+		default:
+			*str++ = '%';
+			if (*fmt)
+				*str++ = *fmt;
+			else
+				--fmt;
+			continue;
+		}
+		if (qualifier == 'l') {
+			num = va_arg(args, unsigned long);
+			if (flags & SIGN)
+				num = (signed long) num;
+		} else if (qualifier == 'Z') {
+			num = va_arg(args, size_t);
+		} else if (qualifier == 'h') {
+			num = (unsigned short) va_arg(args, int);
+			if (flags & SIGN)
+				num = (signed short) num;
+		} else {
+			num = va_arg(args, unsigned int);
+			if (flags & SIGN)
+				num = (signed int) num;
+		}
+		str = number(str, num, base, field_width, precision, flags);
+	}
+	*str = '\0';
+	return str-buf;
+}
+
+int sprintf(char * buf, const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i=vsprintf(buf,fmt,args);
+	va_end(args);
+	return i;
+}
+
+static char sprint_buf[1024];
+
+int
+printf(const char *fmt, ...)
+{
+	va_list args;
+	int n;
+
+	va_start(args, fmt);
+	n = vsprintf(sprint_buf, fmt, args);
+	va_end(args);
+	write(stdout, sprint_buf, n);
+	return n;
+}

arch/powerpc/boot/stdio.h

@@ -7,10 +7,4 @@ extern int sprintf(char *buf, const char *fmt, ...);
 
 extern int vsprintf(char *buf, const char *fmt, va_list args);
 
-extern int putc(int c, void *f);
-extern int putchar(int c);
-extern int getchar(void);
-
-extern int fputs(char *str, void *f);
-
 #endif				/* _PPC_BOOT_STDIO_H_ */

arch/powerpc/boot/zImage.coff.lds

+OUTPUT_ARCH(powerpc:common)
+ENTRY(_start)
+SECTIONS
+{
+  . = (5*1024*1024);
+  _start = .;
+  .text      :
+  {
+    *(.text)
+    *(.fixup)
+  }
+  _etext = .;
+  . = ALIGN(4096);
+  .data    :
+  {
+    *(.rodata*)
+    *(.data*)
+    *(.sdata*)
+    __got2_start = .;
+    *(.got2)
+    __got2_end = .;
+
+    _vmlinux_start =  .;
+    *(.kernel:vmlinux.strip)
+    _vmlinux_end =  .;
+
+    _initrd_start =  .;
+    *(.kernel:initrd)
+    _initrd_end =  .;
+  }
+
+  . = ALIGN(4096);
+  _edata  =  .;
+  __bss_start = .;
+  .bss       :
+  {
+   *(.sbss)
+   *(.bss)
+  }
+  _end = . ;
+
+  /DISCARD/ :
+  {
+    *(.comment)
+  }
+}