In January 2015 we defined the ELF relocation types for the Atari Jaguar J-RISC GPU and DSP processors, in order to allow creating and linking object files in ELF format.

The ELF support for J-RISC is inofficial! It is currently supported by the vasm assembler and the vlink linker. We publish the definitions in the hope that other projects do not create incomptible solutions.

ELF Machine ID

ELF Relocations

• #define R_JAG_NONE 0 No relocation.
• #define R_JAG_ABS32 1 Direct 32 bit.
• #define R_JAG_ABS16 2 Direct 16 bit.
• #define R_JAG_ABS8 3 Direct 8 bit.
• #define R_JAG_REL32 4 PC-relative 32 bit.
• #define R_JAG_REL16 5 PC-relative 16 bit.
• #define R_JAG_REL8 6 PC-relative 8 bit.
• #define R_JAG_ABS5 7 Direct 5 bit.
• #define R_JAG_REL5 8 PC-relative 5 bit.
• #define R_JAG_JR 9 PC-relative branch (distance / 2), 5 bit.
• #define R_JAG_ABS32SWP 10 32-bit direct, swapped halfwords as in MOVEI.
• #define R_JAG_REL32SWP 11 32-bit PC-relative, swapped halfwords as in MOVEI.