[BOLT] Adjust section sizes based on file offsets#80226
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When we adjust section sizes while rewriting a binary, we should be using section offsets and not addresses to determine if section overlap. NFC for existing binaries.
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Why? What's the scenario where that makes a difference? |
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The answer is in the comment: "address continuity is not guaranteed as sections could be placed in different loadable segments." Practically, it's needed for the Linux kernel. Let me see if I can produce a test case to simulate the section/segment layout. |
aaupov
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aaupov
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Thanks for explaining and adding a test case
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* llvm/main: (500 commits) [docs] Add beginner-focused office hours (llvm#80308) [mlir][sparse] external entry method wrapper for sparse tensors (llvm#80326) [StackSlotColoring] Ignore non-spill objects in RemoveDeadStores. (llvm#80242) [libc][stdbit] fix return types (llvm#80337) Revert "[RISCV] Refine cost on Min/Max reduction" (llvm#80340) [TTI]Add support for strided loads/stores. [analyzer][HTMLRewriter] Cache partial rewrite results. (llvm#80220) [flang][openacc][openmp] Use #0 from hlfir.declare value when generating bound ops (llvm#80317) [AArch64][PAC] Expand blend(reg, imm) operation in aarch64-pauth pass (llvm#74729) [SHT_LLVM_BB_ADDR_MAP][llvm-readobj] Implements llvm-readobj handling for PGOAnalysisMap. (llvm#79520) [libc] add bazel support for most of unistd (llvm#80078) [clang-tidy] Remove enforcement of rule C.48 from cppcoreguidelines-prefer-member-init (llvm#80330) [OpenMP] Fix typo (NFC) (llvm#80332) [BOLT] Enable re-writing of Linux kernel binary (llvm#80228) [BOLT] Adjust section sizes based on file offsets (llvm#80226) [libc] fix stdbit include test when not all entrypoints are available (llvm#80323) [RISCV][GISel] RegBank select and instruction select for vector G_ADD, G_SUB (llvm#74114) [RISCV] Add srmcfg CSR from Ssqosid extension. (llvm#79914) [mlir][sparse] add sparsification options to pretty print and debug s… (llvm#80205) [RISCV][MC] MC layer support for the experimental zalasr extension (llvm#79911) ...
agozillon
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When we adjust section sizes while rewriting a binary, we should be using section offsets and not addresses to determine if section overlap. NFC for existing binaries.
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When we adjust section sizes while rewriting a binary, we should be using section offsets and not addresses to determine if section overlap. NFC for existing binaries.