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| author | Luis Machado <luis.machado@linaro.org> | 2020-03-18 13:06:05 -0300 |
|---|---|---|
| committer | Luis Machado <luis.machado@linaro.org> | 2020-12-10 11:45:08 -0300 |
| commit | 6afcd2d4161165fd976c55a9792dbcccd2d5d106 (patch) | |
| tree | fb937c4e5014dfc25d5b05162d78f5e13af25f4c /gdb/arch | |
| parent | 15cc148fb817bc1eb91aa16e5d94e39ebafc11ee (diff) | |
| download | gdb-6afcd2d4161165fd976c55a9792dbcccd2d5d106.zip gdb-6afcd2d4161165fd976c55a9792dbcccd2d5d106.tar.gz gdb-6afcd2d4161165fd976c55a9792dbcccd2d5d106.tar.bz2 | |
[AArch64] SVE/FPSIMD fixup for big endian
The FPSIMD dump in signal frames and ptrace FPSIMD dump in the SVE context
structure follows the target endianness, whereas the SVE dumps are
endianness-independent (LE).
Therefore, when the system is in BE mode, we need to reverse the bytes
for the FPSIMD data.
Given the V registers are larger than 64-bit, I've added a way for value
bytes to be set, as opposed to passing a 64-bit fixed quantity. This fits
nicely with the unwinding *_got_bytes function and makes the trad-frame
more flexible and capable of saving larger registers.
The memory for the bytes is allocated via the frame obstack, so it gets freed
after we're done inspecting the frame.
gdb/ChangeLog:
2020-12-10 Luis Machado <luis.machado@linaro.org>
* aarch64-linux-tdep.c (aarch64_linux_restore_vreg) New function.
(aarch64_linux_sigframe_init): Call aarch64_linux_restore_vreg.
* aarch64-tdep.h (V_REGISTER_SIZE): Move to ...
* arch/aarch64.h: ... here.
* nat/aarch64-sve-linux-ptrace.c: Include endian.h.
(aarch64_maybe_swab128): New function.
(aarch64_sve_regs_copy_to_reg_buf)
(aarch64_sve_regs_copy_from_reg_buf): Adjust FPSIMD entries.
* trad-frame.c (trad_frame_reset_saved_regs): Initialize
the data field.
(TF_REG_VALUE_BYTES): New enum value.
(trad_frame_value_bytes_p): New function.
(trad_frame_set_value_bytes): New function.
(trad_frame_set_reg_value_bytes): New function.
(trad_frame_get_prev_register): Handle register values saved as bytes.
* trad-frame.h (trad_frame_set_reg_value_bytes): New prototype.
(struct trad_frame_saved_reg) <data>: New field.
(trad_frame_set_value_bytes): New prototype.
(trad_frame_value_bytes_p): New prototype.
Diffstat (limited to 'gdb/arch')
| -rw-r--r-- | gdb/arch/aarch64.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gdb/arch/aarch64.h b/gdb/arch/aarch64.h index 857bb22..b753524 100644 --- a/gdb/arch/aarch64.h +++ b/gdb/arch/aarch64.h @@ -58,6 +58,8 @@ enum aarch64_regnum AARCH64_LAST_V_ARG_REGNUM = AARCH64_V0_REGNUM + 7 }; +#define V_REGISTER_SIZE 16 + /* Pseudo register base numbers. */ #define AARCH64_Q0_REGNUM 0 #define AARCH64_D0_REGNUM (AARCH64_Q0_REGNUM + AARCH64_D_REGISTER_COUNT) |