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glsl: Add immediate index oob checking for Cbuf getters

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This commit is contained in:
ameerj
2021-06-11 22:16:34 -04:00
parent 84c86e03cd
commit 7c82f20b52
1 changed files with 16 additions and 0 deletions
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16
src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
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@@ -38,6 +38,15 @@ void GetCbuf(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding, const I
u32 num_bits, std::string_view cast = {}, bool component_indexing_bug = false,
std::string_view bit_offset = {}) {
const bool is_immediate{offset.IsImmediate()};
if (is_immediate) {
const s32 signed_offset{static_cast<s32>(offset.U32())};
static constexpr u32 cbuf_size{4096 * 16};
if (signed_offset < 0 || offset.U32() > cbuf_size) {
// LOG_WARNING(..., "Immediate constant buffer offset is out of bounds");
ctx.AddU32("{}=0u;", inst);
return;
}
}
const auto offset_var{ctx.var_alloc.Consume(offset)};
const auto index{is_immediate ? fmt::format("{}", offset.U32() / 16)
: fmt::format("{}>>4", offset_var)};
@@ -124,7 +133,14 @@ void EmitGetCbufU32x2(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding
const IR::Value& offset) {
const auto cbuf{fmt::format("{}_cbuf{}", ctx.stage_name, binding.U32())};
if (offset.IsImmediate()) {
static constexpr u32 cbuf_size{4096 * 16};
const u32 u32_offset{offset.U32()};
const s32 signed_offset{static_cast<s32>(offset.U32())};
if (signed_offset < 0 || u32_offset > cbuf_size) {
// LOG_WARNING(..., "Immediate constant buffer offset is out of bounds");
ctx.AddU32x2("{}=uvec2(0u);", inst);
return;
}
if (u32_offset % 2 == 0) {
ctx.AddU32x2("{}=ftou({}[{}].{}{});", inst, cbuf, u32_offset / 16,
OffsetSwizzle(u32_offset), OffsetSwizzle(u32_offset + 4));