patch-2.4.19 linux-2.4.19/arch/ppc64/boot/addSystemMap.c

• Lines: 251
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ppc64/boot/addSystemMap.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ppc64/boot/addSystemMap.c linux-2.4.19/arch/ppc64/boot/addSystemMap.c
@@ -0,0 +1,250 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <byteswap.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+
+void xlate( char * inb, char * trb, unsigned len )
+{
+	unsigned i;
+	for (  i=0; i<len; ++i )
+	{
+		char c = *inb++;
+		char c1 = c >> 4;
+		char c2 = c & 0xf;
+		if ( c1 > 9 )
+			c1 = c1 + 'A' - 10;
+		else
+			c1 = c1 + '0';
+		if ( c2 > 9 )
+			c2 = c2 + 'A' - 10;
+		else
+			c2 = c2 + '0';
+		*trb++ = c1;
+		*trb++ = c2;
+	}
+	*trb = 0;
+}
+
+#define ElfHeaderSize  (64 * 1024)
+#define ElfPages  (ElfHeaderSize / 4096)
+
+void get4k( /*istream *inf*/FILE *file, char *buf )
+{
+	unsigned j;
+	unsigned num = fread(buf, 1, 4096, file);
+	for ( j=num; j<4096; ++j )
+		buf[j] = 0;
+}
+
+void put4k( /*ostream *outf*/FILE *file, char *buf )
+{
+	fwrite(buf, 1, 4096, file);
+}
+
+int main(int argc, char **argv)
+{
+	char inbuf[4096];
+	FILE *sysmap = NULL;
+	char* ptr_end = NULL; 
+	FILE *inputVmlinux = NULL;
+	FILE *outputVmlinux = NULL;
+	long i = 0;
+	unsigned long sysmapFileLen = 0;
+	unsigned long sysmapLen = 0;
+	unsigned long roundR = 0;
+	unsigned long kernelLen = 0;
+	unsigned long actualKernelLen = 0;
+	unsigned long round = 0;
+	unsigned long roundedKernelLen = 0;
+	unsigned long sysmapStartOffs = 0;
+	unsigned long sysmapPages = 0;
+	unsigned long roundedKernelPages = 0;
+	long padPages = 0;
+	if ( argc < 2 )
+	{
+		printf("Name of System Map file missing.\n");
+		exit(1);
+	}
+
+	if ( argc < 3 )
+	{
+		printf("Name of vmlinux file missing.\n");
+		exit(1);
+	}
+
+	if ( argc < 4 )
+	{
+		printf("Name of vmlinux output file missing.\n");
+		exit(1);
+	}
+
+	sysmap = fopen(argv[1], "r");
+	if ( ! sysmap )
+	{
+		printf("System Map file \"%s\" failed to open.\n", argv[1]);
+		exit(1);
+	}
+	inputVmlinux = fopen(argv[2], "r");
+	if ( ! inputVmlinux )
+	{
+		printf("vmlinux file \"%s\" failed to open.\n", argv[2]);
+		exit(1);
+	}
+	outputVmlinux = fopen(argv[3], "w");
+	if ( ! outputVmlinux )
+	{
+		printf("output vmlinux file \"%s\" failed to open.\n", argv[3]);
+		exit(1);
+	}
+
+
+  
+	fseek(inputVmlinux, 0, SEEK_END);
+	kernelLen = ftell(inputVmlinux);
+	fseek(inputVmlinux, 0, SEEK_SET);
+	printf("kernel file size = %ld\n", kernelLen);
+	if ( kernelLen == 0 )
+	{
+		printf("You must have a linux kernel specified as argv[2]\n");
+		exit(1);
+	}
+
+
+	actualKernelLen = kernelLen - ElfHeaderSize;
+
+	printf("actual kernel length (minus ELF header) = %ld/%lxx \n", actualKernelLen, actualKernelLen);
+
+	round = actualKernelLen % 4096;
+	roundedKernelLen = actualKernelLen;
+	if ( round )
+		roundedKernelLen += (4096 - round);
+
+	printf("Kernel length rounded up to a 4k multiple = %ld/%lxx \n", roundedKernelLen, roundedKernelLen);
+	roundedKernelPages = roundedKernelLen / 4096;
+	printf("Kernel pages to copy = %ld/%lxx\n", roundedKernelPages, roundedKernelPages);
+
+
+
+	/* Sysmap file */
+	fseek(sysmap, 0, SEEK_END);
+	sysmapFileLen = ftell(sysmap);
+	fseek(sysmap, 0, SEEK_SET);
+	printf("%s file size = %ld\n", argv[1], sysmapFileLen);
+
+	sysmapLen = sysmapFileLen;
+
+	roundR = 4096 - (sysmapLen % 4096);
+	if (roundR)
+	{
+		printf("Rounding System Map file up to a multiple of 4096, adding %ld\n", roundR);
+		sysmapLen += roundR;
+	}
+	printf("Rounded System Map size is %ld\n", sysmapLen);
+  
+  /* Process the Sysmap file to determine the true end of the kernel */
+	sysmapPages = sysmapLen / 4096;
+	printf("System map pages to copy = %ld\n", sysmapPages);
+	for (i=0; i<sysmapPages; ++i)
+	{
+		get4k(sysmap, inbuf);
+	}
+	/* search for _end in the last page of the system map */
+	ptr_end = strstr(inbuf, " _end");
+	if (!ptr_end)
+	{
+		printf("Unable to find _end in the sysmap file \n");
+		printf("inbuf: \n");
+		printf("%s \n", inbuf);
+		exit(1);
+	}
+	printf("Found _end in the last page of the sysmap - backing up 10 characters it looks like %s", ptr_end-10);
+	sysmapStartOffs = (unsigned int)strtol(ptr_end-10, NULL, 16);
+	/* calc how many pages we need to insert between the vmlinux and the start of the sysmap */
+	padPages = sysmapStartOffs/4096 - roundedKernelPages;
+
+	/* Check and see if the vmlinux is larger than _end in System.map */
+	if (padPages < 0)
+	{ /* vmlinux is larger than _end - adjust the offset to start the embedded system map */ 
+		sysmapStartOffs = roundedKernelLen;
+		printf("vmlinux is larger than _end indicates it needs to be - sysmapStartOffs = %lx \n", sysmapStartOffs);
+		padPages = 0;
+		printf("will insert %lx pages between the vmlinux and the start of the sysmap \n", padPages);
+	}
+	else
+	{ /* _end is larger than vmlinux - use the sysmapStartOffs we calculated from the system map */
+		printf("vmlinux is smaller than _end indicates is needed - sysmapStartOffs = %lx \n", sysmapStartOffs);
+		printf("will insert %lx pages between the vmlinux and the start of the sysmap \n", padPages);
+	}
+
+
+
+
+	/* Copy 64K ELF header */
+	for (i=0; i<(ElfPages); ++i)
+	{
+		get4k( inputVmlinux, inbuf );
+		put4k( outputVmlinux, inbuf );
+	}
+
+  
+	/* Copy the vmlinux (as full pages). */
+	fseek(inputVmlinux, ElfHeaderSize, SEEK_SET);
+	for ( i=0; i<roundedKernelPages; ++i )
+	{
+		get4k( inputVmlinux, inbuf );
+    
+		/* Set the offsets (of the start and end) of the embedded sysmap so it is set in the vmlinux.sm */
+		if ( i == 0 )
+		{
+			unsigned long * p;
+			printf("Storing embedded_sysmap_start at 0x3c\n");
+			p = (unsigned long *)(inbuf + 0x3c);
+
+#if (BYTE_ORDER == __BIG_ENDIAN)
+			*p = sysmapStartOffs;
+#else
+			*p = bswap_32(sysmapStartOffs);
+#endif
+
+			printf("Storing embedded_sysmap_end at 0x44\n");
+			p = (unsigned long *)(inbuf + 0x44);
+
+#if (BYTE_ORDER == __BIG_ENDIAN)
+			*p = sysmapStartOffs + sysmapFileLen;
+#else
+			*p = bswap_32(sysmapStartOffs + sysmapFileLen);
+#endif
+		}
+    
+		put4k( outputVmlinux, inbuf );
+	}
+  
+  
+	/* Insert any pad pages between the end of the vmlinux and where the system map needs to be. */
+	for (i=0; i<padPages; ++i)
+	{
+		memset(inbuf, 0, 4096);
+		put4k(outputVmlinux, inbuf);
+	}
+
+
+	/* Copy the system map (as full pages). */
+	fseek(sysmap, 0, SEEK_SET);  /* start reading from begining of the system map */
+	for ( i=0; i<sysmapPages; ++i )
+	{
+		get4k( sysmap, inbuf );
+		put4k( outputVmlinux, inbuf );
+	}
+
+
+	fclose(sysmap);
+	fclose(inputVmlinux);
+	fclose(outputVmlinux);
+	/* Set permission to executable */
+	chmod(argv[3], S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
+
+	return 0;
+}
+