https://llvm.org/bugs/show_bug.cgi?id=25050
Bug ID: 25050
Summary: 'register read -a' provides wrong values of FPU x87
Special Purpose Registers for x86_64-FreeBSD platform
Product: lldb
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 15002
--> https://llvm.org/bugs/attachment.cgi?id=15002&action=edit
Source file (compiled to produce the failure)
Environment: FreeBSD 10.2-RELEASE on x86_64, Compiler: clang-3.7.0
LLDB : Built from source (Checked out from public repo; revision 248711)
Commands to compile inferior:
clang++ -g -O0 -std=c++11 -fno-builtin -m64 source.cpp -o a.out
Commands executed to pose the bug:
$ lldb a.out
(lldb) b 7
(lldb) run
(lldb) register read -a
(lldb) next
'next' instruction executes some assembly instructions to push float values
on 'st' stack
(lldb) register read -a
Value of fstat and ftag didn't change compared to their values in previous
register read -a command.
This bug is similar to bug 24457 but for FreeBSD platform.
I am working on it and submit a patch soon.
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