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do not rely on lane 0 scratch ptrs for results in p2r - prone to races

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This commit is contained in:
Ryan Fleury
2026-03-02 12:17:03 -08:00
parent 9227e884ac
commit 2af3990971
2 changed files with 111 additions and 96 deletions
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src/x64/x64.c
+48 -48
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@@ -119,66 +119,66 @@ x64_set_debug_break(U64 *drs, U64 trap_idx, U64 addr, U64 size, X64_BreakpointTy
{
// set breakpoint address
switch (trap_idx) {
case 0: { drs[0] = addr; } break;
case 1: { drs[1] = addr; } break;
case 2: { drs[2] = addr; } break;
case 3: { drs[3] = addr; } break;
default: { InvalidPath; } break;
case 0: { drs[0] = addr; } break;
case 1: { drs[1] = addr; } break;
case 2: { drs[2] = addr; } break;
case 3: { drs[3] = addr; } break;
default: { InvalidPath; } break;
}
// enable breakpoint
drs[7] &= ~(3 << (trap_idx * 2));
switch (bp_type)
{
case X64_BreakpointType_Null: break;
case X64_BreakpointType_Local: { drs[7] |= 1 << (trap_idx * 2); } break;
case X64_BreakpointType_Global: { drs[7] |= 2 << (trap_idx * 2); } break;
default: { InvalidPath; } break;
case X64_BreakpointType_Null: break;
case X64_BreakpointType_Local: { drs[7] |= 1 << (trap_idx * 2); } break;
case X64_BreakpointType_Global: { drs[7] |= 2 << (trap_idx * 2); } break;
default: { InvalidPath; } break;
}
// set break access type
switch (break_type) {
case X64_DebugBreakType_Exec:
case X64_DebugBreakType_Exec:
Assert(size == 0);
case X64_DebugBreakType_Null: {
drs[7] &= ~((1u << 16) << (trap_idx * 4));
drs[7] &= ~((1u << 17) << (trap_idx * 4));
} break;
case X64_DebugBreakType_Write: {
drs[7] |= (1u << 16) << (trap_idx * 4);
drs[7] &= ~((1u << 17) << (trap_idx * 4));
} break;
case X64_DebugBreakType_ReadWriteIO: {
drs[7] &= ~((1u << 16) << (trap_idx * 4));
drs[7] |= (1u << 17) << (trap_idx * 4);
} break;
case X64_DebugBreakType_ReadWriteNoFetch: {
drs[7] |= (1u << 16) << (trap_idx * 4);
drs[7] |= (1u << 17) << (trap_idx * 4);
} break;
default: { InvalidPath; } break;
case X64_DebugBreakType_Null: {
drs[7] &= ~((1ull << 16) << (trap_idx * 4));
drs[7] &= ~((1ull << 17) << (trap_idx * 4));
} break;
case X64_DebugBreakType_Write: {
drs[7] |= (1ull << 16) << (trap_idx * 4);
drs[7] &= ~((1ull << 17) << (trap_idx * 4));
} break;
case X64_DebugBreakType_ReadWriteIO: {
drs[7] &= ~((1ull << 16) << (trap_idx * 4));
drs[7] |= (1ull << 17) << (trap_idx * 4);
} break;
case X64_DebugBreakType_ReadWriteNoFetch: {
drs[7] |= (1u << 16) << (trap_idx * 4);
drs[7] |= (1u << 17) << (trap_idx * 4);
} break;
default: { InvalidPath; } break;
}
// set breakpoint size
switch (size) {
case 0:
case 1: {
drs[7] &= ~((1u << 18) << (trap_idx * 4));
drs[7] &= ~((1u << 19) << (trap_idx * 4));
} break;
case 2: {
drs[7] |= (1 << 18) << (trap_idx * 4);
drs[7] &= ~((1 << 19) << (trap_idx * 4));
} break;
case 4: {
drs[7] |= (1 << 18) << (trap_idx * 4);
drs[7] |= (1 << 19) << (trap_idx * 4);
} break;
case 8: {
drs[7] &= ~((1 << 18) << (trap_idx * 4));
drs[7] |= (1 << 19) << (trap_idx * 4);
} break;
default: { InvalidPath; }
case 0:
case 1: {
drs[7] &= ~((1ull << 18) << (trap_idx * 4));
drs[7] &= ~((1ull << 19) << (trap_idx * 4));
} break;
case 2: {
drs[7] |= (1 << 18) << (trap_idx * 4);
drs[7] &= ~((1 << 19) << (trap_idx * 4));
} break;
case 4: {
drs[7] |= (1 << 18) << (trap_idx * 4);
drs[7] |= (1 << 19) << (trap_idx * 4);
} break;
case 8: {
drs[7] &= ~((1 << 18) << (trap_idx * 4));
drs[7] |= (1 << 19) << (trap_idx * 4);
} break;
default: { InvalidPath; }
}
}