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Andrew Burgess cb3dee0e0e gdb/riscv: fix gdb.arch/riscv-unwind-long-insn.exp on RV64
I noticed that the gdb.arch/riscv-unwind-long-insn.exp test was
failing when run on a 64-bit RISC-V target.

The problem was that GDB was failing to stop after a finish command,
and was then running to an unexpected location.

The reason GDB failed to stop at the finish breakpoint was that the
frame-id of the inferior, when we reached the finish breakpoint,
didn't match the expected frame-id that was stored on the breakpoint.

The reason for this mismatch was that the assembler code that is
included in this test, was written only taking 32-bit RISC-V into
account, as a result, the $fp register was being corrupted, and this
was causing the frame-id mismatch.

Specifically, the $fp register would end up being sign-extended from
32 to 64 bits.  If the expected $fp value has some significant bits
above bit 31 then the computed and expected frame-ids would not match.

To fix this I propose merging the two .s files into a single .S file,
and making use of preprocessor macros to specialise the file for the
correct size of $fp.  There are plenty of existing tests that already
make use of preprocessor macros in assembler files, so I assume this
approach is fine.

Once I'd decided to make use of preprocessor macros to solve the 32/64
bit issue, then I figured I might as well merge the two test assembler
files, they only differed by a single instruction.

With this change in place I now see this test fully passing on 32 and
64 bit RISC-V targets.
2022-08-16 17:10:49 +01:00
bfd PR29495, rewrite_elf_program_header looping 2022-08-16 18:19:34 +09:30
binutils PR29362, some binutils memory leaks 2022-08-16 00:25:10 +09:30
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gdb gdb/riscv: fix gdb.arch/riscv-unwind-long-insn.exp on RV64 2022-08-16 17:10:49 +01:00
gdbserver Use strwinerror in gdb/windows-nat.c 2022-08-16 08:04:37 -06:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
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If you are receiving this as part of a GDB release, see the file gdb/README.
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	./configure 
	make

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then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
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	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

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