[Tarantool-patches] [PATCH luajit 1/4] Revert "Fix cur_L tracking on exceptional path"

[Maxim Kokryashkin]

This reverts commit 97699d9ee2467389b6aea21a098e38aff3469b5f.

As was mentioned in tarantool/tarantool#6189, throwing an error
not on the currently executed coroutine is a violation of the
Lua/C API. This patch is a part of the patchset that supports
this violation and is reverted because of it.

Part of tarantool/tarantool#6323
---
 src/vm_x64.dasc | 9 ++++-----
 src/vm_x86.dasc | 8 ++++----
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/vm_x64.dasc b/src/vm_x64.dasc
index 09bf67e5..116716ac 100644
--- a/src/vm_x64.dasc
+++ b/src/vm_x64.dasc
@@ -533,11 +533,11 @@ static void build_subroutines(BuildCtx *ctx)
   |  mov eax, CARG2d			// Error return status for vm_pcall.
   |  mov rsp, CARG1
   |->vm_unwind_c_eh:			// Landing pad for external unwinder.
-  |  mov L:DISPATCH, SAVE_L
-  |  mov GL:RB, L:DISPATCH->glref
-  |  mov GL:RB->cur_L, L:DISPATCH
+  |  mov L:RB, SAVE_L
+  |  mov GL:RB, L:RB->glref
+  |  mov [GL:RB->cur_L], L:RB
   |  mov dword GL:RB->vmstate, ~LJ_VMST_CFUNC
-  |  mov DISPATCH, L:DISPATCH->glref	// Setup pointer to dispatch table.
+  |  mov DISPATCH, GL:RB   // Setup pointer to dispatch table.
   |  add DISPATCH, GG_G2DISP
   |  jmp ->vm_leave_unw
   |
@@ -561,7 +561,6 @@ static void build_subroutines(BuildCtx *ctx)
   |  add DISPATCH, GG_G2DISP
   |  mov PC, [BASE-8]			// Fetch PC of previous frame.
   |  mov_false RA
-  |  mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB
   |  mov RB, [BASE]
   |  mov [BASE-16], RA			// Prepend false to error message.
   |  mov [BASE-8], RB
diff --git a/src/vm_x86.dasc b/src/vm_x86.dasc
index f16ade1a..e3fbf751 100644
--- a/src/vm_x86.dasc
+++ b/src/vm_x86.dasc
@@ -681,11 +681,11 @@ static void build_subroutines(BuildCtx *ctx)
   |.endif
   |.endif
   |->vm_unwind_c_eh:			// Landing pad for external unwinder.
-  |  mov L:DISPATCH, SAVE_L
-  |  mov GL:RB, L:DISPATCH->glref
-  |  mov dword GL:RB->cur_L, L:DISPATCH
+  |  mov L:RB, SAVE_L
+  |  mov GL:RB, L:RB->glref
+  |  mov dword GL:RB->cur_L, L:RB
   |  mov dword GL:RB->vmstate, ~LJ_VMST_CFUNC
-  |  mov DISPATCH, L:DISPATCH->glref	// Setup pointer to dispatch table.
+  |  mov DISPATCH, GL:RB   // Setup pointer to dispatch table.
   |  add DISPATCH, GG_G2DISP
   |  jmp ->vm_leave_unw
   |
-- 
2.42.0