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https://github.com/ibm-s390-linux/s390-tools.git
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e764f460c4
The binary Linux kernel image is built to be loaded to memory address 0x0 but the first 64 kbyte contain an IPL header that is not used for disk IPL. zIPL strips away this IPL header when writing IPL records to disk, loads the remaining data to memory address 0x10000 and uses the memory area below that for its own boot loader code. The Secure Boot firmware feature checks the integrity of an installed image during IPL using a checksum that was generated for the full image. Since the checksum becomes invalid if the IPL header is removed, zIPL must be changed to write the full image to disk. This patch modifies the zIPL logic to no longer strip away the IPL header. Instead the full image is loaded to a higher memory address and relocated by the stage 3 boot loader code to its final location. Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Mini libc implementation
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*
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* Copyright IBM Corp. 2013, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef LIBC_H
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#define LIBC_H
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#define NULL ((void *) 0)
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#define EPERM 1 /* Operation not permitted */
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#define ENOENT 2 /* No such file or directory */
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#define ESRCH 3 /* No such process */
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#define EINTR 4 /* Interrupted system call */
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#define EIO 5 /* I/O error */
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#define ENXIO 6 /* No such device or address */
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#define E2BIG 7 /* Argument list too long */
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#define ENOEXEC 8 /* Exec format error */
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#define EBADF 9 /* Bad file number */
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#define ECHILD 10 /* No child processes */
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#define EAGAIN 11 /* Try again */
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#define ENOMEM 12 /* Out of memory */
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#define EACCES 13 /* Permission denied */
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#define EFAULT 14 /* Bad address */
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#define ENOTBLK 15 /* Block device required */
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#define EBUSY 16 /* Device or resource busy */
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#define EEXIST 17 /* File exists */
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#define EXDEV 18 /* Cross-device link */
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#define ENODEV 19 /* No such device */
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#define ENOTDIR 20 /* Not a directory */
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#define EISDIR 21 /* Is a directory */
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#define EINVAL 22 /* Invalid argument */
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#define ENFILE 23 /* File table overflow */
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#define EMFILE 24 /* Too many open files */
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#define ENOTTY 25 /* Not a typewriter */
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#define MIB (1024ULL * 1024)
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typedef unsigned long long uint64_t;
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typedef unsigned int uint32_t;
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typedef unsigned short uint16_t;
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typedef unsigned char uint8_t;
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void printf(const char *, ...);
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void sprintf(char *, const char *, ...);
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void *memcpy(void *, const void *, unsigned long);
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void *memmove(void *, const void *, unsigned long);
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void *memset(void *, int c, unsigned long);
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char *strcat(char *, const char *);
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int strncmp(const char *, const char *, unsigned long);
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unsigned long strtoul(const char *, char **, int);
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unsigned long ebcstrtoul(char *, char **, int);
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int strlen(const char *);
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char *strcpy(char *, const char *);
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unsigned long get_zeroed_page(void);
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void free_page(unsigned long);
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void initialize(void);
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void libc_stop(unsigned long) __attribute__((noreturn));
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void start(void);
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void pgm_check_handler(void);
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void pgm_check_handler_fn(void);
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static inline int isdigit(int c)
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{
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return (c >= '0') && (c <= '9');
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}
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static inline int isspace(char c)
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{
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return (c == 32) || (c >= 9 && c <= 13);
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}
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static inline int ebc_isspace(char c)
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{
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return (c == 0x40) || (c == 0x05) || (c == 0x15) || (c == 0x25) ||
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(c == 0x0b) || (c == 0x0c) || (c == 0x0d);
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}
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static inline int ebc_isdigit(char c)
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{
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return (c >= 0xf0) && (c <= 0xf9);
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}
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static inline int ebc_isupper(char c)
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{
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return (c >= 0xC1 && c <= 0xC9) || (c >= 0xD1 && c <= 0xD9) ||
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(c >= 0xE2 && c <= 0xE9);
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}
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static inline char ebc_tolower(char c)
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{
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if (ebc_isupper(c))
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c -= 0x40;
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return c;
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}
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#endif /* LIBC_H */
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