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S390 Linkage Conventions
Joran Siu edited this page Mar 17, 2014
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The following documents the V8 Javascript linkage conventions for S390.
| Register | Usage | Call Effect | Comments |
|---|---|---|---|
| r0 | Volatile | ||
| r1 | Volatile | ||
| r2 | parm 1 / return value | Volatile | |
| r3 | parm 2 | Volatile | |
| r4 | parm 3 | Volatile | |
| r5 | parm 4 | Volatile | |
| r6 | parm 5 | Saved | |
| r7 | Saved | ||
| r8 | Saved | ||
| r9 | Saved | ||
| r10 | Saved | Roots Register | |
| r11 | fp | Saved | Frame Pointer |
| r12 | ip | Volatile | Intraprocedural pointer |
| r13 | cp | Saved | Context Pointer |
| r14 | ra | Volatile | Return Address / Link Register |
| r15 | sp | Saved | Stack Pointer |