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Correction r.3909 - validating addresses ESP before displaying a stack dump

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git-svn-id: svn://kolibrios.org@3911 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Marat Zakiyanov (Mario79) 2013-09-16 21:58:27 +00:00
parent c03235ca5e
commit ce83320fde
1 changed files with 76 additions and 3 deletions
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79
kernel/trunk/core/sys32.inc
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@ -247,10 +247,83 @@ show_error_parameters:
DEBUGF 1, "K : EDX : %x ESI : %x EDI : %x\n", [reg_edx+4], [reg_esi+4], [reg_edi+4] DEBUGF 1, "K : EDX : %x ESI : %x EDI : %x\n", [reg_edx+4], [reg_esi+4], [reg_edi+4]
DEBUGF 1, "K : EBP : %x EIP : %x ESP : %x\n", [reg_ebp+4], [reg_eip+4], ebx DEBUGF 1, "K : EBP : %x EIP : %x ESP : %x\n", [reg_ebp+4], [reg_eip+4], ebx
DEBUGF 1, "K : Flags : %x CS : %x (%s)\n", [reg_eflags+4], eax, edi DEBUGF 1, "K : Flags : %x CS : %x (%s)\n", [reg_eflags+4], eax, edi
DEBUGF 1, "K : Stack dump:\n" DEBUGF 1, "K : Stack dump:\n"
DEBUGF 1, "K : [ESP+00]: %x [ESP+04]: %x [ESP+08]: %x\n", [ebx], [ebx+4], [ebx+8] push eax ebx ecx edx
DEBUGF 1, "K : [ESP+12]: %x [ESP+16]: %x [ESP+20]: %x\n", [ebx+12], [ebx+16], [ebx+20] call .check_ESP
DEBUGF 1, "K : [ESP+24]: %x [ESP+28]: %x [ESP+32]: %x\n", [ebx+24], [ebx+28], [ebx+32] test eax, eax
jnz .error_ESP
DEBUGF 1, "K : [ESP+00]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+04]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+08]: %x\n",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, "K : [ESP+12]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+16]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+20]: %x\n",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, "K : [ESP+24]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+28]: %x",[ebx]
add ebx, 4
call .check_ESP
test eax, eax
jnz .error_ESP
DEBUGF 1, " [ESP+32]: %x\n",[ebx]
pop edx ecx ebx eax
ret
.error_ESP:
pop edx ecx ebx eax
DEBUGF 1, "\n"
DEBUGF 1, "K : Unexpected end of the stack\n"
ret
;--------------------------------------
.check_ESP:
push ebx
shr ebx, 12
mov ecx, ebx
shr ecx, 10
mov edx, [master_tab+ecx*4]
test edx, PG_MAP
jz .fail ;page table is not created
;incorrect address in the program
mov eax, [page_tabs+ebx*4]
test eax, 2
jz .fail ;address not reserved for use. error
pop ebx
xor eax, eax
ret
.fail:
pop ebx
xor eax, eax
dec eax
ret ret
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