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https://github.com/ibm-s390-linux/s390-tools.git
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7f09f0e4ad
In an upcoming patch the refactored function `pt_load_add` is reused. While at it, add a wrap-around check to `pt_load_add`, replace `g.opts.device` access with `fh->path` (this makes this function easier testable) and improve the documentation. Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* zgetdump - Tool for copying and converting System z dumps
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*
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* Common ELF core dump input format definitions
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*
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* Copyright IBM Corp. 2001, 2022
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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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#include "dfi_elf_common.h"
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#include <assert.h>
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#include "lib/util_log.h"
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int pt_load_add(const struct zg_fh *fh, const Elf64_Phdr *phdr, void **data,
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dfi_mem_chunk_read_fn read_fn, dfi_mem_chunk_free_fn free_fn)
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{
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assert(fh);
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assert(phdr);
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assert(data);
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assert(read_fn);
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assert(free_fn);
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util_log_print(
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UTIL_LOG_DEBUG,
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"%s p_paddr 0x%016lx p_vaddr 0x%016lx p_offset 0x%016lx p_filesz 0x%016lx p_memsz 0x%016lx\n",
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__func__, phdr->p_paddr, phdr->p_vaddr, phdr->p_offset, phdr->p_filesz,
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phdr->p_memsz);
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if (phdr->p_paddr != phdr->p_vaddr) {
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STDERR("Dump file \"%s\" is a user space core dump\n", fh->path);
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return -EINVAL;
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}
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if (phdr->p_memsz == 0)
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return -EINVAL;
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if (phdr->p_offset + phdr->p_filesz > zg_size(fh))
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return -EINVAL;
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if (phdr->p_filesz > phdr->p_memsz)
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return -EINVAL;
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/* check for wrap-around */
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if (phdr->p_paddr + phdr->p_filesz < phdr->p_paddr)
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return -EINVAL;
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if (phdr->p_filesz > 0) {
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dfi_mem_chunk_add(phdr->p_paddr, phdr->p_filesz, *data, read_fn, free_fn);
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*data = NULL;
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} else {
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/* Free @data directly as it's not used */
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free_fn(*data);
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*data = NULL;
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}
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if (phdr->p_memsz - phdr->p_filesz > 0) {
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/* Add zero memory chunk */
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dfi_mem_chunk_add(phdr->p_paddr + phdr->p_filesz, phdr->p_memsz - phdr->p_filesz,
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NULL, dfi_mem_chunk_read_zero, NULL);
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}
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return 0;
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}
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