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Apply mask to rela->r_addend to get the patching scheme #8186

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merged 3 commits into from
May 21, 2024
Merged

Apply mask to rela->r_addend to get the patching scheme #8186

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b9861c8
Apply mask to rela->r_addend to get the patching scheme
May 20, 2024
3ecccf4
Merge branch 'master' into patchSchemeMask
May 21, 2024
2279d01
Change from CamelCase to snake_case
May 21, 2024
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7 changes: 6 additions & 1 deletion src/runtime_src/core/common/api/xrt_module.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -408,6 +408,11 @@ class module_impl
// construct patcher objects for each argument.
class module_elf : public module_impl
{
// rela->addend have offset to base-bo-addr info along with schema
// [0:3] bit are used for patching schema, [4:31] used for base-bo-addr
constexpr static uint32_t Addend_Shift = 4;
constexpr static uint32_t Addend_Mask = ~((uint32_t)0) << Addend_Shift;
constexpr static uint32_t Schema_Mask = ~Addend_Mask;
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xrt::elf m_elf;
uint8_t m_os_abi = Elf_Amd_Aie2p;
std::vector<ctrlcode> m_ctrlcodes;
Expand Down Expand Up @@ -637,7 +642,7 @@ class module_elf : public module_impl
if (auto search = arg2patchers.find(key_string); search != arg2patchers.end())
search->second.m_ctrlcode_offset.emplace_back(offset);
else {
auto symbol_type = static_cast<patcher::symbol_type>(rela->r_addend);
auto symbol_type = static_cast<patcher::symbol_type>(rela->r_addend & Schema_Mask);
arg2patchers.emplace(std::move(key_string), patcher{ symbol_type, {offset}, buf_type });
}
}
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