From: Roland M. Roehrich <rroehric at mc.com>
This hack passes a hardcoded codepage as the first segment in the
sys_kexec_load call. It shows how to use the "[patch 1/1] Kexec: allow
passed in codepage on sys_kexec_load", sent separately. This hack will
probably not work on your platform, and will need customization. No
work was done to incorporate this function properly into the tool.
Signed-off-by: Roland M. Roehrich <rroehric at mc.com>
---
This patch applies to kexec-tools-1.101.
A codepage is binary, and should probably contain relative
jumps...except the last one....
Debug prints turned on....
Not intended to be merged....
diff -uprN kexec-tools-1.101/kexec/arch/ppc/kexec-ppc.c
kexec-tools-1.101.mercury/kexec/arch/ppc/kexec-ppc.c
--- kexec-tools-1.101/kexec/arch/ppc/kexec-ppc.c 2005-01-11
01:28:03.000000000 -0500
+++ kexec-tools-1.101.mercury/kexec/arch/ppc/kexec-ppc.c
2006-10-26 20:48:54.000000000 -0400
@@ -33,6 +33,13 @@ int get_memory_ranges(struct memory_rang
memory_range[memory_ranges].type = RANGE_RAM;
memory_ranges++;
#else
+ /* MRCY DRAM - 256M populated on TahoeSBC */
+ memory_range[memory_ranges].start = 0x00008000;
+ memory_range[memory_ranges].end = 0x10000000;
+ memory_range[memory_ranges].type = RANGE_RAM;
+ memory_ranges++;
+#endif
+#ifdef FALSE
#error Please, fix this for your platform
const char iomem[] = "/proc/iomem";
char line[MAX_LINE];
diff -uprN kexec-tools-1.101/kexec/kexec.c
kexec-tools-1.101.mercury/kexec/kexec.c
--- kexec-tools-1.101/kexec/kexec.c 2005-01-13 08:24:29.000000000 -0500
+++ kexec-tools-1.101.mercury/kexec/kexec.c 2006-10-26
20:35:35.000000000 -0400
@@ -498,6 +498,9 @@ static int my_load(const char *type, int
char *kernel;
char *kernel_buf;
off_t kernel_size;
+ char *codepages;
+ char *codepages_buf;
+ off_t codepages_size;
int i = 0;
int result;
struct kexec_info info;
@@ -514,10 +517,12 @@ static int my_load(const char *type, int
usage();
return -1;
}
+
+
kernel = argv[fileind];
/* slurp in the input kernel */
kernel_buf = slurp_decompress_file(kernel, &kernel_size);
-#if 0
+#if 1
fprintf(stderr, "kernel: %p kernel_size: %lx\n",
kernel_buf, kernel_size);
#endif
@@ -526,6 +531,7 @@ static int my_load(const char *type, int
fprintf(stderr, "Could not get memory layout\n");
return -1;
}
+
/* if a kernel type was specified, try to honor it */
if (type) {
for (i = 0; i < file_types; i++) {
@@ -577,13 +583,45 @@ static int my_load(const char *type, int
return -1;
}
}
+printf("loading codepages...");
+ codepages = &"/home/codepage.bin";
+ codepages_buf = slurp_decompress_file(codepages, &codepages_size);
+#if 1
+ fprintf(stderr, "codepages: %p codepages_size: 0x%lx\n",
+ codepages_buf, codepages_size);
+#endif
+ add_segment(&info, codepages_buf, codepages_size, 0x9000,
codepages_size);
+ kexec_flags |= KEXEC_USE_PASSED_CODEPAGE;
+printf("ok\n");
/* Sort the segments and verify we don't have overlaps */
if (sort_segments(&info) < 0) {
return -1;
}
+printf("Mush around\n");
+ { unsigned long temp_buf;
+ unsigned long temp_bufsz;
+ unsigned long temp_mem;
+ unsigned long temp_memsz;
+
+ temp_buf = info.segment[1].buf;
+ temp_bufsz = info.segment[1].bufsz;
+ temp_mem = info.segment[1].mem;
+ temp_memsz = info.segment[1].memsz;
+
+ info.segment[1].buf = info.segment[0].buf;
+ info.segment[1].bufsz = info.segment[0].bufsz;
+ info.segment[1].mem = info.segment[0].mem;
+ info.segment[1].memsz = info.segment[0].memsz;
+
+ info.segment[0].buf = temp_buf;
+ info.segment[0].bufsz = temp_bufsz;
+ info.segment[0].mem = temp_mem;
+ info.segment[0].memsz = temp_memsz;
+ }
+
/* if purgatory is loaded update it */
update_purgatory(&info);
-#if 0
+#if 1
fprintf(stderr, "kexec_load: entry = %p flags = %lx\n",
info.entry, kexec_flags);
print_segments(stderr, &info);
diff -uprN kexec-tools-1.101/kexec/kexec-syscall.h
kexec-tools-1.101.mercury/kexec/kexec-syscall.h
--- kexec-tools-1.101/kexec/kexec-syscall.h 2005-01-06
01:59:50.000000000 -0500
+++ kexec-tools-1.101.mercury/kexec/kexec-syscall.h 2006-10-16
10:09:24.000000000 -0400
@@ -55,8 +55,9 @@ static inline long kexec_reboot(void)
}
-#define KEXEC_ON_CRASH 0x00000001
-#define KEXEC_ARCH_MASK 0xffff0000
+#define KEXEC_ON_CRASH 0x00000001
+#define KEXEC_USE_PASSED_CODEPAGE 0x00000002
+#define KEXEC_ARCH_MASK 0xffff0000
/* These values match the ELF architecture values.
* Unless there is a good reason that should continue to be the case.
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