RVOPcode
RISC-V Topic Guide

Function Call

RISC-V function calls tie together JAL/JALR, x1 ra and the x5 alternate link register, call/ret assembler pseudo-instructions, and return-address stack (RAS) hints encoded implicitly by rd/rs1 link-register conventions.

JALJALRcallretrarasspa0a1

Core Concepts

JAL

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JALR

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call

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ret

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ra

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ras

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sp

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a0

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a1

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Related Entries

control-flowcalling-conventionstack-framesystem-callexception-handlinginterrupt-handling

Official References

RISC-V behavior on this topic should be checked against the official specifications; content additions should only use facts verifiable in these documents.

RISC-V Unprivileged ISA ManualRISC-V Privileged Architecture ManualRISC-V Assembly Programmer's ManualRISC-V psABI Specification