Messages in this thread Patch in this message | | | From | Ed Swierk <> | Subject | Longer command line for kexec on i386 | Date | Mon, 23 Jul 2007 15:42:09 +0000 (UTC) |
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I'm attempting to get kexec to pass a command line longer than 256 bytes to the new kernel, using kexec-tools-testing-20070330 and kernel 2.6.22.1. The new kernel is a bzImage, and I'm using kexec to tack on a command line and an initrd.
I made the following change to kexec:
--- kexec-tools-testing-20070330.orig/include/x86/x86-linux.h +++ kexec-tools-testing-20070330/include/x86/x86-linux.h @@ -148,14 +148,13 @@ #endif struct e820entry e820_map[E820MAX]; /* 0x2d0 */ /* 0x550 */ -#define COMMAND_LINE_SIZE 256 +#define COMMAND_LINE_SIZE 2048 };
struct x86_linux_faked_param_header { struct x86_linux_param_header hdr; /* 0x00 */ uint8_t reserved16[688]; /* 0x550 */ - uint8_t command_line[COMMAND_LINE_SIZE]; /* 0x800 */ - uint8_t reserved17[1792]; /* 0x900 - 0x1000 */ + uint8_t command_line[COMMAND_LINE_SIZE]; /* 0x800 - 0x1000 */ };
struct x86_linux_header { but I'm now seeing intermittent corruption of the initrd in the new kernel--a few bytes at different locations each time.
I suspect I've neglected some other important changes to the boot protocol. Any clues would be appreciated.
Thanks, --Ed
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