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Subtle ABI mismatch in bundled SoftFloat library

OngoingIssue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.Issue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.

Researching...The issue is being looked into or additional information is being gathered/located.The issue is being looked into or additional information is being gathered/located.

Status: Open.

#833 In sdl-hercules-390/hyperion;

· gottfriedleibniz opened on Apr 18, 2026

Question about TLB lookup logic

DiscussionDevelopers are invited to discuss a design change or solution to a coding problem.Developers are invited to discuss a design change or solution to a coding problem.

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

OngoingIssue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.Issue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.

Researching...The issue is being looked into or additional information is being gathered/located.The issue is being looked into or additional information is being gathered/located.

Status: Open.

#828 In sdl-hercules-390/hyperion;

· Pierre-Laumeau opened on Apr 10, 2026

Ubuntu 24.04 glibc Fortification at runtime problem.

Status: Open.

#823 In sdl-hercules-390/hyperion;

· videoman opened on Apr 2, 2026

IPO/LTO inter-procedural-optimization/link-time-optimization option missing

AApple reported or Apple-only issue (i.e. something that doesn't seem to occur on Windows or Linux.)Apple reported or Apple-only issue (i.e. something that doesn't seem to occur on Windows or Linux.)

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

LLinux reported or Linux-only issue, such as with tuntap networking that doesn't occur on Windows.Linux reported or Linux-only issue, such as with tuntap networking that doesn't occur on Windows.

Status: Open.

#822 In sdl-hercules-390/hyperion;

· c2r68fs65 opened on Apr 2, 2026

ARCHLVL cpu reset leading to interrupt handling race

BUGThe issue describes likely incorrect product functionality that likely needs corrected.The issue describes likely incorrect product functionality that likely needs corrected.

OngoingIssue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.Issue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.

Status: Open.

#806 In sdl-hercules-390/hyperion;

· gottfriedleibniz opened on Mar 2, 2026

Additions for 370 Extensions Facility (Y instructions)

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

QUESTION...A question was asked but has not been answered yet, -OR- additional feedback is requested.A question was asked but has not been answered yet, -OR- additional feedback is requested.

Status: Open.

#799 In sdl-hercules-390/hyperion;

· procegrog-cyber opened on Jan 12, 2026

Create a new Hercules specific DIAGnose code (via the DIAG opcode) to return the currently enabled Facilities

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

QUESTION...A question was asked but has not been answered yet, -OR- additional feedback is requested.A question was asked but has not been answered yet, -OR- additional feedback is requested.

Status: Open.

#797 In sdl-hercules-390/hyperion;

· MarkSWaterbury721 opened on Jan 6, 2026

Documenting Hercules messages: thoughts on best way to approach this endeavor

DiscussionDevelopers are invited to discuss a design change or solution to a coding problem.Developers are invited to discuss a design change or solution to a coding problem.

DOC BUGProblem caused (or possibly caused) by incorrect, unclear or missing documentation.Problem caused (or possibly caused) by incorrect, unclear or missing documentation.

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

Status: Open.

#785 In sdl-hercules-390/hyperion;

· Fish-Git opened on Nov 19, 2025

QETH networking with utun devices on macOS

AApple reported or Apple-only issue (i.e. something that doesn't seem to occur on Windows or Linux.)Apple reported or Apple-only issue (i.e. something that doesn't seem to occur on Windows or Linux.)

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

HELP!Help is needed from someone more experienced or I'm simply overloaded with too much work right now!Help is needed from someone more experienced or I'm simply overloaded with too much work right now!

RelatedThis issue is closely related to another issue. Consider this issue a "sub-issue" of the other.This issue is closely related to another issue. Consider this issue a "sub-issue" of the other.

Status: Open.

#736 In sdl-hercules-390/hyperion;

· iblowmymind opened on Apr 6, 2025

async 'sf' cmd can trip lock bug in dasd caching causing CRASH

BUGThe issue describes likely incorrect product functionality that likely needs corrected.The issue describes likely incorrect product functionality that likely needs corrected.

OngoingIssue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.Issue is long-term. Variant of IN PROGRESS: it's being worked on but maybe not at this exact moment.

Status: Open.

#618 In sdl-hercules-390/hyperion;

· Fish-Git opened on Feb 6, 2024

Add LPAR name as prefix of thread names

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

Status: Open.

#577 In sdl-hercules-390/hyperion;

· swhobbit opened on Jun 25, 2023

Publish tags for submodules corresponding to Hercules releases

EnhancementThis issue does not describe a problem but rather describes a suggested change or improvement.This issue does not describe a problem but rather describes a suggested change or improvement.

Status: Open.

#530 In sdl-hercules-390/hyperion;

· matoro opened on Dec 1, 2022