19ee4a9049
Move ExceptionStubHeaderSize from 16 to 32 bits to work around clang relocation limitation. Use movw, not move for 32-bit segment register operations. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anderw Fish <afish@apple.com> Reviewed-by: Jeff Fan <jeff.fan@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16067 6f19259b-4bc3-4df7-8a09-765794883524
399 lines
9.0 KiB
NASM
399 lines
9.0 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; AsmFuncs.asm
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;
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; Abstract:
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;
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; Debug interrupt handle functions.
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;
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;------------------------------------------------------------------------------
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#include "DebugException.h"
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externdef InterruptProcess:near
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data SEGMENT
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public Exception0Handle, TimerInterruptHandle, ExceptionStubHeaderSize
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AGENT_HANDLER_SIGNATURE MACRO
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db 41h, 47h, 54h, 48h ; SIGNATURE_32('A','G','T','H')
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ENDM
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ExceptionStubHeaderSize dd Exception1Handle - Exception0Handle ;
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CommonEntryAddr dq CommonEntry ;
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.code
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AGENT_HANDLER_SIGNATURE
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Exception0Handle:
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cli
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push rcx
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mov rcx, 0
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception1Handle:
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cli
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push rcx
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mov rcx, 1
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception2Handle:
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cli
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push rcx
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mov rcx, 2
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception3Handle:
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cli
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push rcx
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mov rcx, 3
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception4Handle:
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cli
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push rcx
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mov rcx, 4
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception5Handle:
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cli
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push rcx
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mov rcx, 5
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception6Handle:
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cli
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push rcx
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mov rcx, 6
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception7Handle:
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cli
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push rcx
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mov rcx, 7
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception8Handle:
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cli
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push rcx
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mov rcx, 8
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception9Handle:
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cli
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push rcx
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mov rcx, 9
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception10Handle:
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cli
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push rcx
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mov rcx, 10
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception11Handle:
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cli
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push rcx
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mov rcx, 11
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception12Handle:
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cli
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push rcx
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mov rcx, 12
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception13Handle:
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cli
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push rcx
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mov rcx, 13
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception14Handle:
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cli
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push rcx
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mov rcx, 14
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception15Handle:
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cli
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push rcx
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mov rcx, 15
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception16Handle:
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cli
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push rcx
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mov rcx, 16
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception17Handle:
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cli
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push rcx
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mov rcx, 17
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception18Handle:
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cli
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push rcx
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mov rcx, 18
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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Exception19Handle:
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cli
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push rcx
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mov rcx, 19
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jmp qword ptr [CommonEntryAddr]
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AGENT_HANDLER_SIGNATURE
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TimerInterruptHandle:
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cli
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push rcx
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mov rcx, 32
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jmp qword ptr [CommonEntryAddr]
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CommonEntry:
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; We need to determine if any extra data was pushed by the exception
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cmp rcx, DEBUG_EXCEPT_DOUBLE_FAULT
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_INVALID_TSS
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_SEG_NOT_PRESENT
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_STACK_FAULT
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_GP_FAULT
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_PAGE_FAULT
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je NoExtrPush
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cmp rcx, DEBUG_EXCEPT_ALIGNMENT_CHECK
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je NoExtrPush
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push [rsp]
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mov qword ptr [rsp + 8], 0
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NoExtrPush:
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push rbp
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mov rbp, rsp
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; store UINT64 r8, r9, r10, r11, r12, r13, r14, r15;
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push r15
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push r14
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push r13
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push r12
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push r11
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push r10
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push r9
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push r8
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mov r8, cr8
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push r8
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; store UINT64 Rdi, Rsi, Rbp, Rsp, Rdx, Rcx, Rbx, Rax;
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push rax
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push rbx
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push qword ptr [rbp + 8] ; original rcx
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push rdx
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push qword ptr [rbp + 6 * 8] ; original rsp
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push qword ptr [rbp] ; original rbp
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push rsi
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push rdi
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;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
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;; insure FXSAVE/FXRSTOR is enabled in CR4...
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;; ... while we're at it, make sure DE is also enabled...
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mov rax, cr4
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or rax, 208h
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mov cr4, rax
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push rax
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mov rax, cr3
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push rax
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mov rax, cr2
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push rax
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push 0
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mov rax, cr0
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push rax
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xor rax, rax
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mov rax, Ss
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push rax
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mov rax, Cs
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push rax
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mov rax, Ds
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push rax
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mov rax, Es
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push rax
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mov rax, Fs
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push rax
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mov rax, Gs
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push rax
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;; EIP
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mov rax, [rbp + 8 * 3] ; EIP
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push rax
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;; UINT64 Gdtr[2], Idtr[2];
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sub rsp, 16
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sidt fword ptr [rsp]
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sub rsp, 16
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sgdt fword ptr [rsp]
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;; UINT64 Ldtr, Tr;
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xor rax, rax
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str ax
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push rax
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sldt ax
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push rax
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;; EFlags
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mov rax, [rbp + 8 * 5]
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push rax
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;; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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mov rax, dr7
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push rax
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;; clear Dr7 while executing debugger itself
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xor rax, rax
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mov dr7, rax
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;; Dr6
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mov rax, dr6
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push rax
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;; insure all status bits in dr6 are clear...
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xor rax, rax
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mov dr6, rax
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mov rax, dr3
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push rax
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mov rax, dr2
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push rax
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mov rax, dr1
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push rax
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mov rax, dr0
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push rax
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sub rsp, 512
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mov rdi, rsp
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db 0fh, 0aeh, 00000111y ;fxsave [rdi]
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;; save the exception data
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push qword ptr [rbp + 16]
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;; Clear Direction Flag
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cld
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; call the C interrupt process function
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mov rdx, rsp ; Structure
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mov r15, rcx ; save vector in r15
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;
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; Per X64 calling convention, allocate maximum parameter stack space
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; and make sure RSP is 16-byte aligned
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;
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sub rsp, 32 + 8
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call InterruptProcess
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add rsp, 32 + 8
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;; skip the exception data
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add rsp, 8
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mov rsi, rsp
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db 0fh, 0aeh, 00001110y ; fxrstor [rsi]
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add rsp, 512
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;; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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pop rax
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mov dr0, rax
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pop rax
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mov dr1, rax
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pop rax
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mov dr2, rax
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pop rax
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mov dr3, rax
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;; skip restore of dr6. We cleared dr6 during the context save.
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add rsp, 8
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pop rax
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mov dr7, rax
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;; set EFlags
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pop qword ptr [rbp + 8 * 5]
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;; UINT64 Ldtr, Tr;
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;; UINT64 Gdtr[2], Idtr[2];
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;; Best not let anyone mess with these particular registers...
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add rsp, 24 * 2
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;; UINT64 Eip;
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pop qword ptr [rbp + 8 * 3] ; set EIP in stack
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;; UINT64 Gs, Fs, Es, Ds, Cs, Ss;
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;; NOTE - modified segment registers could hang the debugger... We
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;; could attempt to insulate ourselves against this possibility,
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;; but that poses risks as well.
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;;
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pop rax
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pop rax
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pop rax
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mov es, rax
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pop rax
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mov ds, rax
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pop qword ptr [rbp + 8 * 4] ; Set CS in stack
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pop rax
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mov ss, rax
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;; UINT64 Cr0, Cr1, Cr2, Cr3, Cr4;
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pop rax
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mov cr0, rax
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add rsp, 8 ; skip for Cr1
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pop rax
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mov cr2, rax
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pop rax
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mov cr3, rax
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pop rax
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mov cr4, rax
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;; restore general register
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pop rdi
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pop rsi
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add rsp, 8 ; skip rbp
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add rsp, 8 ; skip rsp
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pop rdx
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pop rcx
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pop rbx
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pop rax
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pop r8
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mov cr8, r8
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; store UINT64 r8, r9, r10, r11, r12, r13, r14, r15;
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pop r8
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pop r9
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pop r10
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pop r11
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pop r12
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pop r13
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pop r14
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pop r15
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mov rsp, rbp
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pop rbp
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add rsp, 16 ; skip rcx and error code
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iretq
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END
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