Re: [PATCH v5 2/4] riscv: Introduce CONFIG_RELOCATABLE

Hi Jerome, Le 6/10/20 à 10:10 AM, Jerome Forissier a écrit : On 6/7/20 9:59 AM, Alexandre Ghiti wrote: [...] +config RELOCATABLE + bool + depends on MMU + help + This builds a kernel as a Position Independent Executable (PIE), + which retains all relocation

Re: [PATCH v5 2/4] riscv: Introduce CONFIG_RELOCATABLE

On 6/7/20 9:59 AM, Alexandre Ghiti wrote: [...] > +config RELOCATABLE > + bool > + depends on MMU > + help > + This builds a kernel as a Position Independent Executable (PIE), > + which retains all relocation metadata required to relocate the > + kernel

[PATCH v5 2/4] riscv: Introduce CONFIG_RELOCATABLE

This config allows to compile the kernel as PIE and to relocate it at any virtual address at runtime: this paves the way to KASLR and to 4-level page table folding at runtime. Runtime relocation is possible since relocation metadata are embedded into the kernel. Note that relocating at runtime