riscv/qemu - qemu - Gitea: Git with a cup of tea

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Author SHA1 Message Date

Author	SHA1	Message	Date
Peter Maydell	7bdd67a560	target/arm: Report pauth information to gdb as 'pauth_v2' So that we can avoid the "older gdb crashes" problem described in commit `5787d17a42` and which caused us to disable reporting pauth information via the gdbstub, newer gdb is going to implement support for recognizing the pauth information via a new feature name: org.gnu.gdb.aarch64.pauth_v2 Older gdb won't recognize this feature name, so we can re-enable the pauth support under the new name without risking them crashing. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20230406150827.3322670-1-peter.maydell@linaro.org	3 years ago
Richard Henderson	e995d5cce4	target/arm: Implement gdbstub pauth extension The extension is primarily defined by the Linux kernel NT_ARM_PAC_MASK ptrace register set. The original gdb feature consists of two masks, data and code, which are used to mask out the authentication code within a pointer. Following discussion with Luis Machado, add two more masks in order to support pointers within the high half of the address space (i.e. TTBR1 vs TTBR0). Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1105 Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20230227213329.793795-12-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>	4 years ago

Peter Maydell

7bdd67a560

target/arm: Report pauth information to gdb as 'pauth_v2'

So that we can avoid the "older gdb crashes" problem described in
commit 5787d17a42 and which caused us to disable reporting pauth
information via the gdbstub, newer gdb is going to implement support
for recognizing the pauth information via a new feature name:
 org.gnu.gdb.aarch64.pauth_v2

Older gdb won't recognize this feature name, so we can re-enable the
pauth support under the new name without risking them crashing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230406150827.3322670-1-peter.maydell@linaro.org

3 years ago

Richard Henderson

e995d5cce4

target/arm: Implement gdbstub pauth extension

The extension is primarily defined by the Linux kernel NT_ARM_PAC_MASK
ptrace register set.

The original gdb feature consists of two masks, data and code, which are
used to mask out the authentication code within a pointer.  Following
discussion with Luis Machado, add two more masks in order to support
pointers within the high half of the address space (i.e. TTBR1 vs TTBR0).

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1105
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230227213329.793795-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 years ago

2 Commits (master)