nicolas/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[compiler-rt][interception][win] Add error messages for some errors

Browse Source 
Depends on D149002

Differential Revision: https://reviews.llvm.org/D149346
This commit is contained in:
Alvin Wong
2023-04-23 02:13:48 +08:00
parent 0716888d82
commit 1a7a00bdc9
1 changed files with 10 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
compiler-rt/lib/interception/interception_win.cpp
View File

@@ -270,8 +270,13 @@ static void WritePadding(uptr from, uptr size) {
}
static void WriteJumpInstruction(uptr from, uptr target) {
if (!DistanceIsWithin2Gig(from + kJumpInstructionLength, target))
if (!DistanceIsWithin2Gig(from + kJumpInstructionLength, target)) {
ReportError(
"interception_win: cannot write jmp further than 2GB away, from %p to "
"%p.\n",
(void *)from, (void *)target);
InterceptionFailed();
}
ptrdiff_t offset = target - from - kJumpInstructionLength;
*(u8*)from = 0xE9;
*(u32*)(from + 1) = offset;
@@ -295,6 +300,10 @@ static void WriteIndirectJumpInstruction(uptr from, uptr indirect_target) {
int offset = indirect_target - from - kIndirectJumpInstructionLength;
if (!DistanceIsWithin2Gig(from + kIndirectJumpInstructionLength,
indirect_target)) {
ReportError(
"interception_win: cannot write indirect jmp with target further than "
"2GB away, from %p to %p.\n",
(void *)from, (void *)indirect_target);
InterceptionFailed();
}
*(u16*)from = 0x25FF;