Dt_relr Jun 2026

Historically, this was handled via DT_RELA (or DT_REL ). In this scheme, every single memory location requiring a fix-up has its own entry in a relocation table. Each entry typically consists of a 64-bit offset (where to fix) and a 64-bit "addend" (what to add). Consequently, a single relocation entry consumes 16 bytes (on 64-bit systems).

Diff - platform/bionic.git - Git at Google - Android GoogleSource

When a computer program is compiled, it often includes "relative addresses." Because modern operating systems use , a program cannot guarantee it will be loaded at the exact same memory address every time. To fix this, the system uses a process called relocation . dt_relr

Despite its clear theoretical advantages, DT_RELR has faced a slow adoption curve. Proposed by Google and implemented initially for Android (to improve app startup times on mobile devices), it has gradually made its way into the GNU toolchain and LLVM.

: By reducing the size of the relocation section, the operating system can load programs faster and use less RAM. Historically, this was handled via DT_RELA (or DT_REL )

: Specifies the total size of the DT_RELR table in bytes.

| Method | Key Difference | |--------|----------------| | | Generates rules from multiple trees and fits a linear model with L1 penalty. | | RandomForest + LR | Uses entire forest’s leaf outputs; often more robust but less interpretable. | | GAM (Generalized Additive Model) | Captures non‑linearity with splines, but fewer automatic interactions. | Consequently, a single relocation entry consumes 16 bytes

: Specifies the total size (in bytes) of the relative relocation table.