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| author | Russ Cox <rsc@golang.org> | 2021-01-28 16:22:52 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2021-02-19 00:02:49 +0000 |
| commit | 54da3ab385686dec5554164ba9558214445deec9 (patch) | |
| tree | 93bad7fe11b54fde70f0580d0c0e1766b68e730b /src/runtime/asm_riscv64.s | |
| parent | fbe74dbf4263841819368a2a3c90e599392e0808 (diff) | |
| download | go-54da3ab385686dec5554164ba9558214445deec9.tar.gz go-54da3ab385686dec5554164ba9558214445deec9.zip | |
runtime: use TOPFRAME to identify top-of-frame functions
No change to actual runtime, but helps reduce the laundry list
of functions.
mcall, morestack, and asmcgocall are not actually top-of-frame,
so those need more attention in follow-up CLs.
mstart moved to assembly so that it can be marked TOPFRAME.
Since TOPFRAME also tells DWARF consumers not to unwind
this way, this change should also improve debuggers a
marginal amount.
This CL is part of a stack adding windows/arm64
support (#36439), intended to land in the Go 1.17 cycle.
This CL is, however, not windows/arm64-specific.
It is cleanup meant to make the port (and future ports) easier.
Change-Id: If1e0d46ca973de5e46b62948d076f675f285b5d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/288802
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'src/runtime/asm_riscv64.s')
| -rw-r--r-- | src/runtime/asm_riscv64.s | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/runtime/asm_riscv64.s b/src/runtime/asm_riscv64.s index d06c77b948..30f2bd2e4a 100644 --- a/src/runtime/asm_riscv64.s +++ b/src/runtime/asm_riscv64.s @@ -7,7 +7,7 @@ #include "textflag.h" // func rt0_go() -TEXT runtime·rt0_go(SB),NOSPLIT,$0 +TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0 // X2 = stack; A0 = argc; A1 = argv ADD $-24, X2 MOV A0, 8(X2) // argc @@ -70,6 +70,10 @@ nocgo: WORD $0 // crash if reached RET +TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0 + CALL runtime·mstart0(SB) + RET // not reached + // void setg_gcc(G*); set g called from gcc with g in A0 TEXT setg_gcc<>(SB),NOSPLIT,$0-0 MOV A0, g |