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[AArch64] Fix off-by-one when calculating tag granules.

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When we want to fetch tags from a memory range, the last address in that
range is not included.

There is a off-by-one error in aarch64_mte_get_tag_granules, which this
patch fixes.

gdb/ChangeLog:

2021-05-13  Luis Machado  <luis.machado@linaro.org>

	* arch/aarch64-mte-linux.c (aarch64_mte_get_tag_granules): Don't
	include the last address in the range.
This commit is contained in:
Luis Machado 2021-04-29 15:10:06 -03:00
parent 7671eff8f0
commit 0746f49b1d
2 changed files with 8 additions and 2 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2021-05-13 Luis Machado <luis.machado@linaro.org>
* arch/aarch64-mte-linux.c (aarch64_mte_get_tag_granules): Don't
include the last address in the range.
2021-05-12 Simon Marchi <simon.marchi@polymtl.ca>
* python/python-internal.h (gdbpy_parse_command_name): Return

5
gdb/arch/aarch64-mte-linux.c
View File

@ -31,9 +31,10 @@ aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
/* Start address */
CORE_ADDR s_addr = align_down (addr, granule_size);
/* End address */
CORE_ADDR e_addr = align_down (addr + len, granule_size);
CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
/* We always have at least 1 granule. */
/* We always have at least 1 granule because len is non-zero at this
point. */
return 1 + (e_addr - s_addr) / granule_size;
}