diff options
| author | Joel Sing <joel@sing.id.au> | 2019-11-04 02:31:37 +1100 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2019-12-24 03:42:15 +0000 |
| commit | 7cab55dfd38ca24c327a648907d6befbf828447e (patch) | |
| tree | fc68d31e9a949eac9bb764529a35335a42c7a3a0 /src/cmd/asm | |
| parent | 372efbbf3170ccf260186118cd3acf7f617055ae (diff) | |
| download | go-7cab55dfd38ca24c327a648907d6befbf828447e.tar.xz | |
cmd/internal/obj/riscv: handle call, jmp and branch
Also provide REG_LR to more clearly define the link register.
Based on the riscv-go port.
Updates #27532
Change-Id: I0805f373682f93b3918a01c21d4ef34eb3817c75
Reviewed-on: https://go-review.googlesource.com/c/go/+/204627
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Diffstat (limited to 'src/cmd/asm')
| -rw-r--r-- | src/cmd/asm/internal/asm/testdata/riscvenc.s | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/cmd/asm/internal/asm/testdata/riscvenc.s b/src/cmd/asm/internal/asm/testdata/riscvenc.s index 73f41dd877..21d1c40d9d 100644 --- a/src/cmd/asm/internal/asm/testdata/riscvenc.s +++ b/src/cmd/asm/internal/asm/testdata/riscvenc.s @@ -267,3 +267,18 @@ start: MOVD 4(X5), F0 // 07b04200 MOVD F0, 4(X5) // 27b20200 MOVD F0, F1 // d3000022 + + // These jumps can get printed as jumps to 2 because they go to the + // second instruction in the function (the first instruction is an + // invisible stack pointer adjustment). + JMP start // JMP 2 // 6ff05fcd + JMP (X5) // 67800200 + JMP 4(X5) // 67804200 + + // JMP and CALL to symbol are encoded as: + // AUIPC $0, TMP + // JALR $0, TMP + // with a R_RISCV_PCREL_ITYPE relocation - the linker resolves the + // real address and updates the immediates for both instructions. + CALL asmtest(SB) // 970f0000 + JMP asmtest(SB) // 970f0000 |