ST registers are incorrect

[bannsec]

Work environment

Questions	Answers
OS/arch/bits (mandatory)	Ubuntu x86 64
File format of the file you reverse (mandatory)	ELF
Architecture/bits of the file (mandatory)	x86/64
r2 -v full output, not truncated (mandatory)	radare2 3.3.0-git 81 @ linux-x86-64 git.3.3.0-git commit: 69ed848 build: 2019-02-13__23:04:54

Expected behavior

The dr st0 type commands and drf should show the correct values for the ST registers.

Actual behavior

They do not. It appears that radare is truncating reading the ST registers at 64bits, when in reality ST registers are 80 bits. This leads to wildly inaccurate responses about the values.

Steps to reproduce the behavior

• Load test binary given below in both gdb and r2
• Break at 0x004011fa
• Compare what r2 believes the value is (st7) to gdb. Note it is truncated in r2.

Additional Logs, screenshots, source-code, configuration dump, ...

Adding the test binary.
known_values.zip