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x86_64 Linux: Add fallback for CPUs without RDFSBASE/WRFSBASE

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Luke Street
2025-11-10 00:22:56 -07:00
parent 76f97efe07
commit 2494b541b7
5 changed files with 71 additions and 9 deletions
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4
tools/gen_trampolines.py
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@@ -721,7 +721,7 @@ def emit_cc_thunk64(f: FuncInfo | TypedefInfo, lines: List[str]):
if sys.platform != "darwin":
# Save FS base
lines.append("\trdfsbase r9")
lines.append("\tREAD_FSBASE r9, rbx")
lines.append("\tmov qword ptr [rbx+TEB_FSBASE], r9")
# Save RSP and load guest stack
@@ -782,7 +782,7 @@ def emit_cc_thunk64(f: FuncInfo | TypedefInfo, lines: List[str]):
if sys.platform != "darwin":
# Restore FS base
lines.append("\tmov r9, qword ptr [rbx+TEB_FSBASE]")
lines.append("\twrfsbase r9")
lines.append("\tWRITE_FSBASE r9, rbx")
# Restore host stack
lines.append("\tmov rsp, qword ptr [rbx+TEB_SP]")