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781d5d5263
for f in $(find src include -name '*.[ch]'); do expand -t 8 $f > $tmp; mv $tmp $f; done
98 lines
3 KiB
C
98 lines
3 KiB
C
/* libunwind - a platform-independent unwind library
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "_UCD_lib.h"
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#include "_UCD_internal.h"
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int
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_UCD_access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *val,
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int write, void *arg)
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{
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if (write)
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{
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Debug(0, "write is not supported\n");
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return -UNW_EINVAL;
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}
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struct UCD_info *ui = arg;
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unw_word_t addr_last = addr + sizeof(*val)-1;
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coredump_phdr_t *phdr;
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unsigned i;
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for (i = 0; i < ui->phdrs_count; i++)
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{
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phdr = &ui->phdrs[i];
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if (phdr->p_vaddr <= addr && addr_last < phdr->p_vaddr + phdr->p_memsz)
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{
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goto found;
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}
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}
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Debug(1, "addr 0x%llx is unmapped\n", (unsigned long long)addr);
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return -UNW_EINVAL;
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found: ;
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const char *filename UNUSED;
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off_t fileofs;
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int fd;
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if (addr_last >= phdr->p_vaddr + phdr->p_filesz)
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{
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/* This part of mapped address space is not present in coredump file */
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/* Do we have it in the backup file? */
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if (phdr->backing_fd < 0)
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{
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Debug(1, "access to not-present data in phdr[%d]: addr:0x%llx\n",
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i, (unsigned long long)addr
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);
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return -UNW_EINVAL;
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}
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filename = phdr->backing_filename;
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fileofs = addr - phdr->p_vaddr;
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fd = phdr->backing_fd;
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goto read;
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}
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filename = ui->coredump_filename;
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fileofs = phdr->p_offset + (addr - phdr->p_vaddr);
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fd = ui->coredump_fd;
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read:
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if (lseek(fd, fileofs, SEEK_SET) != fileofs)
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goto read_error;
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if (read(fd, val, sizeof(*val)) != sizeof(*val))
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goto read_error;
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Debug(1, "0x%llx <- [addr:0x%llx fileofs:0x%llx]\n",
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(unsigned long long)(*val),
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(unsigned long long)addr,
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(unsigned long long)fileofs
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);
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return 0;
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read_error:
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Debug(1, "access out of file: addr:0x%llx fileofs:%llx file:'%s'\n",
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(unsigned long long)addr,
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(unsigned long long)fileofs,
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filename
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);
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return -UNW_EINVAL;
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}
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