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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Make mbootpack work on big-endian systems.
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 77af705567921f3336ed78ef601af8cf64be9138
# Parent 1de508b9063b0b712caf16009677078f23712125
Make mbootpack work on big-endian systems.
Signed-off-by: Michal Ostrowski <mostrows@xxxxxxxxxxxxxx>
diff -r 1de508b9063b -r 77af70556792 tools/misc/mbootpack/Makefile
--- a/tools/misc/mbootpack/Makefile Tue Aug 30 11:53:47 2005
+++ b/tools/misc/mbootpack/Makefile Tue Aug 30 13:12:47 2005
@@ -20,8 +20,7 @@
INCS := -I. -I-
DEFS :=
LDFLAGS :=
-CC := gcc
-CFLAGS := -Wall -Wpointer-arith -Wcast-qual -Wno-unused -Wno-format
+CFLAGS := -Wall -Wpointer-arith -Wcast-qual -Wno-unused -Wno-format
CFLAGS += -Wmissing-prototypes
#CFLAGS += -pipe -g -O0 -Wcast-align
CFLAGS += -pipe -O3
@@ -34,7 +33,7 @@
DEPS = .*.d
mbootpack: $(OBJS)
- $(CC) -o $@ $(filter-out %.a, $^) $(LDFLAGS)
+ $(HOSTCC) -o $@ $(filter-out %.a, $^) $(LDFLAGS)
clean:
$(RM) mbootpack *.o $(DEPS) bootsect setup bzimage_header.c bin2c
@@ -48,7 +47,7 @@
$(LD) -m elf_i386 -Ttext 0x0 -s --oformat binary setup.o -o $@
bin2c: bin2c.o
- $(CC) -o $@ $^
+ $(HOSTCC) -o $@ $^
bzimage_header.c: bootsect setup bin2c
./bin2c -n 8 -b1 -a bzimage_bootsect bootsect > bzimage_header.c
@@ -58,10 +57,10 @@
@
%.o: %.S
- $(CC) $(DEPFLAGS) $(CFLAGS) $(INCS) $(DEFS) -c $< -o $@
+ $(HOSTCC) $(DEPFLAGS) $(CFLAGS) $(INCS) $(DEFS) -c $< -o $@
%.o: %.c
- $(CC) $(DEPFLAGS) $(CFLAGS) $(INCS) $(DEFS) -c $< -o $@
+ $(HOSTCC) $(DEPFLAGS) $(CFLAGS) $(INCS) $(DEFS) -c $< -o $@
.PHONY: all clean gdb
.PRECIOUS: $(OBJS) $(OBJS:.o=.c) $(DEPS)
diff -r 1de508b9063b -r 77af70556792 tools/misc/mbootpack/buildimage.c
--- a/tools/misc/mbootpack/buildimage.c Tue Aug 30 11:53:47 2005
+++ b/tools/misc/mbootpack/buildimage.c Tue Aug 30 13:12:47 2005
@@ -42,6 +42,7 @@
#include "mbootpack.h"
#include "mb_header.h"
+
/* We will build an image that a bzImage-capable bootloader will load like
* this:
@@ -105,8 +106,8 @@
section_t *s;
/* Patch the kernel and mbi addresses into the setup code */
- *(address_t *)(bzimage_setup + BZ_ENTRY_OFFSET) = entry;
- *(address_t *)(bzimage_setup + BZ_MBI_OFFSET) = mbi;
+ *(address_t *)(bzimage_setup + BZ_ENTRY_OFFSET) = eswap(entry);
+ *(address_t *)(bzimage_setup + BZ_MBI_OFFSET) = eswap(mbi);
if (!quiet) printf("Kernel entry is %p, MBI is %p.\n", entry, mbi);
/* Write out header and trampoline */
diff -r 1de508b9063b -r 77af70556792 tools/misc/mbootpack/mbootpack.c
--- a/tools/misc/mbootpack/mbootpack.c Tue Aug 30 11:53:47 2005
+++ b/tools/misc/mbootpack/mbootpack.c Tue Aug 30 13:12:47 2005
@@ -252,20 +252,21 @@
for (i = 0; i <= MIN(len - 12, MULTIBOOT_SEARCH - 12); i += 4)
{
mbh = (struct multiboot_header *)(headerbuf + i);
- if (mbh->magic != MULTIBOOT_MAGIC
- || ((mbh->magic+mbh->flags+mbh->checksum) & 0xffffffff))
+ if (eswap(mbh->magic) != MULTIBOOT_MAGIC
+ || ((eswap(mbh->magic)+eswap(mbh->flags)+eswap(mbh->checksum))
+ & 0xffffffff))
{
/* Not a multiboot header */
continue;
}
- if (mbh->flags & MULTIBOOT_UNSUPPORTED) {
+ if (eswap(mbh->flags) & MULTIBOOT_UNSUPPORTED) {
/* Requires options we don't support */
printf("Fatal: found a multiboot header, but it "
"requires multiboot options that I\n"
"don't understand. Sorry.\n");
exit(1);
}
- if (mbh->flags & MULTIBOOT_VIDEO_MODE) {
+ if (eswap(mbh->flags) & MULTIBOOT_VIDEO_MODE) {
/* Asked for screen mode information */
/* XXX carry on regardless */
printf("Warning: found a multiboot header which asks "
@@ -275,22 +276,22 @@
}
/* This kernel will do: place and load it */
- if (mbh->flags & MULTIBOOT_AOUT_KLUDGE) {
+ if (eswap(mbh->flags) & MULTIBOOT_AOUT_KLUDGE) {
/* Load using the offsets in the multiboot header */
if(!quiet)
printf("Loading %s using multiboot header.\n", filename);
/* How much is there? */
- start = mbh->load_addr;
- if (mbh->load_end_addr != 0)
- loadsize = mbh->load_end_addr - mbh->load_addr;
+ start = eswap(mbh->load_addr);
+ if (eswap(mbh->load_end_addr) != 0)
+ loadsize = eswap(mbh->load_end_addr) - eswap(mbh->load_addr);
else
loadsize = sb.st_size;
/* How much memory will it take up? */
- if (mbh->bss_end_addr != 0)
- size = mbh->bss_end_addr - mbh->load_addr;
+ if (eswap(mbh->bss_end_addr) != 0)
+ size = eswap(mbh->bss_end_addr) - eswap(mbh->load_addr);
else
size = loadsize;
@@ -335,32 +336,34 @@
/* Done. */
if (!quiet) printf("Loaded kernel from %s\n", filename);
- return mbh->entry_addr;
+ return eswap(mbh->entry_addr);
} else {
/* Now look for an ELF32 header */
ehdr = (Elf32_Ehdr *)headerbuf;
- if (*(unsigned long *)ehdr != 0x464c457f
+ if (*(unsigned long *)ehdr != eswap(0x464c457f)
|| ehdr->e_ident[EI_DATA] != ELFDATA2LSB
|| ehdr->e_ident[EI_CLASS] != ELFCLASS32
- || ehdr->e_machine != EM_386)
+ || eswap(ehdr->e_machine) != EM_386)
{
printf("Fatal: kernel has neither ELF32/x86 nor multiboot load"
" headers.\n");
exit(1);
}
- if (ehdr->e_phoff + ehdr->e_phnum*sizeof(*phdr) > HEADERBUF_SIZE) {
+ if (eswap(ehdr->e_phoff) + eswap(ehdr->e_phnum)*sizeof(*phdr)
+ > HEADERBUF_SIZE) {
/* Don't expect this will happen with sane kernels */
printf("Fatal: too much ELF for me. Try increasing "
"HEADERBUF_SIZE in mbootpack.\n");
exit(1);
}
- if (ehdr->e_phoff + ehdr->e_phnum*sizeof (*phdr) > len) {
+ if (eswap(ehdr->e_phoff) + eswap(ehdr->e_phnum)*sizeof (*phdr)
+ > len) {
printf("Fatal: malformed ELF header overruns EOF.\n");
exit(1);
}
- if (ehdr->e_phnum <= 0) {
+ if (eswap(ehdr->e_phnum) <= 0) {
printf("Fatal: ELF kernel has no program headers.\n");
exit(1);
}
@@ -368,22 +371,22 @@
if(!quiet)
printf("Loading %s using ELF header.\n", filename);
- if (ehdr->e_type != ET_EXEC
- || ehdr->e_version != EV_CURRENT
- || ehdr->e_phentsize != sizeof (Elf32_Phdr)) {
+ if (eswap(ehdr->e_type) != ET_EXEC
+ || eswap(ehdr->e_version) != EV_CURRENT
+ || eswap(ehdr->e_phentsize) != sizeof (Elf32_Phdr)) {
printf("Warning: funny-looking ELF header.\n");
}
- phdr = (Elf32_Phdr *)(headerbuf + ehdr->e_phoff);
+ phdr = (Elf32_Phdr *)(headerbuf + eswap(ehdr->e_phoff));
/* Obey the program headers to load the kernel */
- for(i = 0; i < ehdr->e_phnum; i++) {
-
- start = phdr[i].p_paddr;
- size = phdr[i].p_memsz;
- if (phdr[i].p_type != PT_LOAD)
+ for(i = 0; i < eswap(ehdr->e_phnum); i++) {
+
+ start = eswap(phdr[i].p_paddr);
+ size = eswap(phdr[i].p_memsz);
+ if (eswap(phdr[i].p_type) != PT_LOAD)
loadsize = 0;
else
- loadsize = MIN((long int)phdr[i].p_filesz, size);
+ loadsize = MIN((long int)eswap(phdr[i].p_filesz), size);
if ((buffer = malloc(size)) == NULL) {
printf("Fatal: malloc() for kernel load failed: %s\n",
@@ -396,7 +399,7 @@
/* Load section from file */
if (loadsize > 0) {
- if (fseek(fp, phdr[i].p_offset, SEEK_SET) != 0) {
+ if (fseek(fp, eswap(phdr[i].p_offset), SEEK_SET) != 0) {
printf("Fatal: seek failed in %s\n",
strerror(errno));
exit(1);
@@ -452,7 +455,7 @@
/* Done! */
if (!quiet) printf("Loaded kernel from %s\n", filename);
- return ehdr->e_entry;
+ return eswap(ehdr->e_entry);
}
}
@@ -568,12 +571,12 @@
/* Command line */
p = (char *)(mbi + 1);
sprintf(p, "%s %s", imagename, command_line);
- mbi->cmdline = ((address_t)p) + mbi_reloc_offset;
+ mbi->cmdline = eswap(((address_t)p) + mbi_reloc_offset);
p += command_line_len;
/* Bootloader ID */
sprintf(p, version_string);
- mbi->boot_loader_name = ((address_t)p) + mbi_reloc_offset;
+ mbi->boot_loader_name = eswap(((address_t)p) + mbi_reloc_offset);
p += strlen(version_string) + 1;
/* Next is space for the module command lines */
@@ -582,17 +585,17 @@
/* Last come the module info structs */
modp = (struct mod_list *)
((((address_t)p + mod_command_line_space) + 3) & ~3);
- mbi->mods_count = modules;
- mbi->mods_addr = ((address_t)modp) + mbi_reloc_offset;
+ mbi->mods_count = eswap(modules);
+ mbi->mods_addr = eswap(((address_t)modp) + mbi_reloc_offset);
/* Memory information will be added at boot time, by setup.S
* or trampoline.S. */
- mbi->flags = MB_INFO_CMDLINE | MB_INFO_BOOT_LOADER_NAME;
+ mbi->flags = eswap(MB_INFO_CMDLINE | MB_INFO_BOOT_LOADER_NAME);
/* Load the modules */
if (modules) {
- mbi->flags |= MB_INFO_MODS;
+ mbi->flags = eswap(eswap(mbi->flags) | MB_INFO_MODS);
/* Go back and parse the module command lines */
optind = opterr = 1;
@@ -652,10 +655,10 @@
if (p != NULL) *p = ' ';
/* Fill in the module info struct */
- modp->mod_start = start;
- modp->mod_end = start + size;
- modp->cmdline = (address_t)mod_clp + mbi_reloc_offset;
- modp->pad = 0;
+ modp->mod_start = eswap(start);
+ modp->mod_end = eswap(start + size);
+ modp->cmdline = eswap((address_t)mod_clp + mbi_reloc_offset);
+ modp->pad = eswap(0);
modp++;
/* Store the module command line */
diff -r 1de508b9063b -r 77af70556792 tools/misc/mbootpack/mbootpack.h
--- a/tools/misc/mbootpack/mbootpack.h Tue Aug 30 11:53:47 2005
+++ b/tools/misc/mbootpack/mbootpack.h Tue Aug 30 13:12:47 2005
@@ -31,6 +31,24 @@
#undef NDEBUG
#include <stdio.h>
+
+#include <endian.h>
+#include <byteswap.h>
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define eswap(x) (x)
+#else
+#define eswap(x) \
+ ({ \
+ typeof(x) y = (x); \
+ switch(sizeof(y)) \
+ { \
+ case 2: y = __bswap_16(y); break; \
+ case 4: y = __bswap_32(y); break; \
+ case 8: y = __bswap_64(y); break; \
+ } \
+ y; \
+ })
+#endif
/* Flags */
extern int quiet;
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