[reactos] 03/03: [NTOS:KE] Generate proper frame info for trap handler in GCC builds

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=4e4c47cccc5658977e7ef…

commit 4e4c47cccc5658977e7ef923262fe4b5bb2b56ab
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Tue Mar 2 13:03:37 2021 +0100
Commit:     Jérôme Gardou <jerome.gardou(a)reactos.org>
CommitDate: Tue Mar 2 14:37:39 2021 +0100

    [NTOS:KE] Generate proper frame info for trap handler in GCC builds
    
    CORE-8531
---
 ntoskrnl/include/internal/i386/asmmacro.S | 23 +++++++++++++++++++++++
 ntoskrnl/ke/i386/trap.s                   |  2 ++
 2 files changed, 25 insertions(+)

diff --git a/ntoskrnl/include/internal/i386/asmmacro.S
b/ntoskrnl/include/internal/i386/asmmacro.S
index 543ce3f1bc4..4a3dd56d623 100644
--- a/ntoskrnl/include/internal/i386/asmmacro.S
+++ b/ntoskrnl/include/internal/i386/asmmacro.S
@@ -217,6 +217,29 @@ set_sane_segs:
     mov [esp + KTRAP_FRAME_DEBUGEIP], eax
     mov [esp + KTRAP_FRAME_DEBUGEBP], ebp
     mov ebp, esp
+
+    /* Tell GDB what just happened */
+    CFI_DEF_CFA_REGISTER ebp
+    CFI_ADJUST_CFA_OFFSET FrameSize
+    CFI_REL_OFFSET ss, KTRAP_FRAME_SS
+    CFI_REL_OFFSET gs, KTRAP_FRAME_GS
+    CFI_REL_OFFSET fs, KTRAP_FRAME_FS
+    CFI_REL_OFFSET es, KTRAP_FRAME_ES
+    CFI_REL_OFFSET ds, KTRAP_FRAME_DS
+    CFI_REL_OFFSET cs, KTRAP_FRAME_CS
+
+    CFI_REL_OFFSET edi, KTRAP_FRAME_EDI
+    CFI_REL_OFFSET esi, KTRAP_FRAME_ESI
+    CFI_REL_OFFSET ebx, KTRAP_FRAME_EBX
+    CFI_REL_OFFSET ebp, KTRAP_FRAME_EBP
+    CFI_REL_OFFSET eip, KTRAP_FRAME_EIP
+    CFI_REL_OFFSET esp, KTRAP_FRAME_ESP
+
+if (NOT (Flags AND KI_NONVOLATILES_ONLY))
+    CFI_REL_OFFSET eax, KTRAP_FRAME_EAX
+    CFI_REL_OFFSET ecx, KTRAP_FRAME_ECX
+    CFI_REL_OFFSET edx, KTRAP_FRAME_EDX
+endif
 #endif
 
     /* Set parameter 1 (ECX) to point to the frame */
diff --git a/ntoskrnl/ke/i386/trap.s b/ntoskrnl/ke/i386/trap.s
index 2f8070725d5..c4b2e168c54 100644
--- a/ntoskrnl/ke/i386/trap.s
+++ b/ntoskrnl/ke/i386/trap.s
@@ -125,6 +125,7 @@ ALIGN 4
 EXTERN @KiInterruptTemplateHandler@8:PROC
 PUBLIC _KiInterruptTemplate
 _KiInterruptTemplate:
+    CFI_STARTPROC
     KiEnterTrap KI_PUSH_FAKE_ERROR_CODE
 PUBLIC _KiInterruptTemplate2ndDispatch
 _KiInterruptTemplate2ndDispatch:
@@ -135,6 +136,7 @@ _KiInterruptTemplateObject:
     jmp eax
 PUBLIC _KiInterruptTemplateDispatch
 _KiInterruptTemplateDispatch:
+    CFI_ENDPROC
 
 EXTERN @KiSystemServiceHandler@8:PROC
 PUBLIC _KiSystemService