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68cffbbd44
Teach GDB how to dump memory tags for AArch64 when using the gcore command and how to read memory tag data back from a core file generated by GDB (via gcore) or by the Linux kernel. The format is documented in the Linux Kernel documentation [1]. Each tagged memory range (listed in /proc/<pid>/smaps) gets dumped to its own PT_AARCH64_MEMTAG_MTE segment. A section named ".memtag" is created for each of those segments when reading the core file back. To save a little bit of space, given MTE tags only take 4 bits, the memory tags are stored packed as 2 tags per byte. When reading the data back, the tags are unpacked. I've added a new testcase to exercise the feature. Build-tested with --enable-targets=all and regression tested on aarch64-linux Ubuntu 20.04. [1] Documentation/arm64/memory-tagging-extension.rst (Core Dump Support) |
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.. | ||
aarch32.c | ||
aarch32.h | ||
aarch64-insn.c | ||
aarch64-insn.h | ||
aarch64-mte-linux.c | ||
aarch64-mte-linux.h | ||
aarch64.c | ||
aarch64.h | ||
amd64.c | ||
amd64.h | ||
arc.c | ||
arc.h | ||
arm-get-next-pcs.c | ||
arm-get-next-pcs.h | ||
arm-linux.c | ||
arm-linux.h | ||
arm.c | ||
arm.h | ||
i386.c | ||
i386.h | ||
loongarch.c | ||
loongarch.h | ||
ppc-linux-common.c | ||
ppc-linux-common.h | ||
ppc-linux-tdesc.h | ||
riscv.c | ||
riscv.h | ||
tic6x.c | ||
tic6x.h | ||
xtensa.h |