From 0f2530524ed2d19b3324d9862fff54c0ce10232c Mon Sep 17 00:00:00 2001
From: Tom <tomut@yahoo.com>
Date: Fri, 3 Jul 2020 12:20:15 -0600
Subject: [PATCH] Kernel: Remove /proc/PID/regs

There isn't an easy way to retreive all register contents anymore,
so remove this functionality. We do have the ability to trace
processes, so it shouldn't really be needed anymore.
---
 Kernel/FileSystem/ProcFS.cpp | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/Kernel/FileSystem/ProcFS.cpp b/Kernel/FileSystem/ProcFS.cpp
index 730581d655..32ab08cfda 100644
--- a/Kernel/FileSystem/ProcFS.cpp
+++ b/Kernel/FileSystem/ProcFS.cpp
@@ -110,7 +110,6 @@ enum ProcFileType {
     FI_PID_vm,
     FI_PID_vmobjects,
     FI_PID_stack,
-    FI_PID_regs,
     FI_PID_fds,
     FI_PID_unveil,
     FI_PID_exe,  // symlink
@@ -621,32 +620,6 @@ Optional<KBuffer> procfs$pid_stack(InodeIdentifier identifier)
     return process.backtrace(*handle);
 }
 
-Optional<KBuffer> procfs$pid_regs(InodeIdentifier identifier)
-{
-    auto handle = ProcessInspectionHandle::from_pid(to_pid(identifier));
-    if (!handle)
-        return {};
-    auto& process = handle->process();
-    KBufferBuilder builder;
-    process.for_each_thread([&](Thread& thread) {
-        builder.appendf("Thread %d:\n", thread.tid());
-        auto& tss = thread.tss();
-        builder.appendf("eax: %x\n", tss.eax);
-        builder.appendf("ebx: %x\n", tss.ebx);
-        builder.appendf("ecx: %x\n", tss.ecx);
-        builder.appendf("edx: %x\n", tss.edx);
-        builder.appendf("esi: %x\n", tss.esi);
-        builder.appendf("edi: %x\n", tss.edi);
-        builder.appendf("ebp: %x\n", tss.ebp);
-        builder.appendf("cr3: %x\n", tss.cr3);
-        builder.appendf("flg: %x\n", tss.eflags);
-        builder.appendf("sp:  %w:%x\n", tss.ss, tss.esp);
-        builder.appendf("pc:  %w:%x\n", tss.cs, tss.eip);
-        return IterationDecision::Continue;
-    });
-    return builder.build();
-}
-
 Optional<KBuffer> procfs$pid_exe(InodeIdentifier identifier)
 {
     auto handle = ProcessInspectionHandle::from_pid(to_pid(identifier));
@@ -1610,7 +1583,6 @@ ProcFS::ProcFS()
     m_entries[FI_PID_vm] = { "vm", FI_PID_vm, false, procfs$pid_vm };
     m_entries[FI_PID_vmobjects] = { "vmobjects", FI_PID_vmobjects, true, procfs$pid_vmobjects };
     m_entries[FI_PID_stack] = { "stack", FI_PID_stack, false, procfs$pid_stack };
-    m_entries[FI_PID_regs] = { "regs", FI_PID_regs, true, procfs$pid_regs };
     m_entries[FI_PID_fds] = { "fds", FI_PID_fds, false, procfs$pid_fds };
     m_entries[FI_PID_exe] = { "exe", FI_PID_exe, false, procfs$pid_exe };
     m_entries[FI_PID_cwd] = { "cwd", FI_PID_cwd, false, procfs$pid_cwd };