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author | Yao Qi <yao.qi@linaro.org> | 2016-08-04 11:37:57 +0100 |
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committer | Yao Qi <yao.qi@linaro.org> | 2016-08-04 11:39:19 +0100 |
commit | 6f67973b4280cfd045e632a3340becd16e43b4b1 (patch) | |
tree | e76f932c7273ea3102b62119c8fbd16baa676b17 /include/mach-o | |
parent | fcd4a73d7dc3505662b4d58489f4c1b8b003b8f3 (diff) | |
download | gdb-6f67973b4280cfd045e632a3340becd16e43b4b1.zip gdb-6f67973b4280cfd045e632a3340becd16e43b4b1.tar.gz gdb-6f67973b4280cfd045e632a3340becd16e43b4b1.tar.bz2 |
Determine target description for native aarch64
I find the following test fail when I test native aarch64 gdb with
arm program,
(gdb) PASS: gdb.base/attach-pie-noexec.exp: attach
set architecture arm^M
warning: Selected architecture arm is not compatible with reported target architecture aarch64^M
Architecture `arm' not recognized.^M
The target architecture is set automatically (currently aarch64)^M
(gdb) FAIL: gdb.base/attach-pie-noexec.exp: set architecture arm
GDB thinks the target is aarch64, but it isn't. Nowadays, we are
using some entries AT_PHENT and AT_HWCAP in auxv to determine whether
the process is a 32-bit arm one or 64-bit aarch64 one, and get the
right gdbarch. However, in the process of parsing auxv (in
inf_ptrace_auxv_parse), the size of int and data pointer of
target_gdbarch is used. If debug program exists (in most of cases),
target_gdbarch is already set according to the debug program, which
is arm in my case. Then, GDB can parse auxv successfully. However,
in gdb.base/attach-pie-noexec.exp, the debug program is removed,
target_gdbarch is aarch64 when GDB parse auxv, so GDB can't parse
it successfully.
Instead of using auxv, we check the return value of ptrace NT_ARM_VFP.
If the program is an arm process, NT_ARM_VFP is OK, otherwise, error
is returned.
Additionally, we only return tdesc_arm_with_neon for arm process,
because neon is mandatory on ARMv8.
gdb:
2016-08-04 Yao Qi <yao.qi@linaro.org>
* aarch64-linux-nat.c (tdesc_arm_with_vfpv3): Remove the
declaration.
(aarch64_linux_read_description): Remove code on getting
auxv and select target description on it. Select target
description by the result of NT_ARM_VFP ptrace request.
Diffstat (limited to 'include/mach-o')
0 files changed, 0 insertions, 0 deletions