diff options
| author | Guoqi Chen <chenguoqi@loongson.cn> | 2025-09-04 17:02:01 +0800 |
|---|---|---|
| committer | abner chenc <chenguoqi@loongson.cn> | 2025-09-05 18:11:42 -0700 |
| commit | e8126bce9e511b92b914643d30f96846bbc5c783 (patch) | |
| tree | 065833e47442d95cd372c0b9280c4525314b0964 /src/runtime | |
| parent | d767064170aa3469404d25608d9ff9fa48962337 (diff) | |
| download | go-e8126bce9e511b92b914643d30f96846bbc5c783.tar.xz | |
runtime/cgo: save and restore R31 for crosscall1 on loong64
According to the Loong64 procedure call standard [1], R31 is a static
register and therefore needs to be saved and restored.
Also, the R2 (thread pointer) register has been removed here, as it is
not involved in allocation.
[1]: https://github.com/loongson/la-abi-specs/blob/release/lapcs.adoc
Change-Id: I02e5d4bedf131e491f1a262aa3cbc0896cbc9488
Reviewed-on: https://go-review.googlesource.com/c/go/+/700817
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/cgo/gcc_loong64.S | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/src/runtime/cgo/gcc_loong64.S b/src/runtime/cgo/gcc_loong64.S index c84a3715b2..d2b062f49f 100644 --- a/src/runtime/cgo/gcc_loong64.S +++ b/src/runtime/cgo/gcc_loong64.S @@ -8,23 +8,23 @@ * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g) * * Calling into the gc tool chain, where all registers are caller save. - * Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31 + * Called from standard lp64d ABI, where $r1, $r3, $r22-$r31, and $f24-$f31 * are callee-save, so they must be saved explicitly, along with $r1 (LR). */ .globl crosscall1 crosscall1: addi.d $r3, $r3, -160 st.d $r1, $r3, 0 - st.d $r23, $r3, 8 - st.d $r24, $r3, 16 - st.d $r25, $r3, 24 - st.d $r26, $r3, 32 - st.d $r27, $r3, 40 - st.d $r28, $r3, 48 - st.d $r29, $r3, 56 - st.d $r30, $r3, 64 - st.d $r2, $r3, 72 - st.d $r22, $r3, 80 + st.d $r22, $r3, 8 + st.d $r23, $r3, 16 + st.d $r24, $r3, 24 + st.d $r25, $r3, 32 + st.d $r26, $r3, 40 + st.d $r27, $r3, 48 + st.d $r28, $r3, 56 + st.d $r29, $r3, 64 + st.d $r30, $r3, 72 + st.d $r31, $r3, 80 fst.d $f24, $r3, 88 fst.d $f25, $r3, 96 fst.d $f26, $r3, 104 @@ -40,16 +40,16 @@ crosscall1: jirl $r1, $r5, 0 // call setg_gcc (clobbers R4) jirl $r1, $r23, 0 // call fn - ld.d $r23, $r3, 8 - ld.d $r24, $r3, 16 - ld.d $r25, $r3, 24 - ld.d $r26, $r3, 32 - ld.d $r27, $r3, 40 - ld.d $r28, $r3, 48 - ld.d $r29, $r3, 56 - ld.d $r30, $r3, 64 - ld.d $r2, $r3, 72 - ld.d $r22, $r3, 80 + ld.d $r22, $r3, 8 + ld.d $r23, $r3, 16 + ld.d $r24, $r3, 24 + ld.d $r25, $r3, 32 + ld.d $r26, $r3, 40 + ld.d $r27, $r3, 48 + ld.d $r28, $r3, 56 + ld.d $r29, $r3, 64 + ld.d $r30, $r3, 72 + ld.d $r31, $r3, 80 fld.d $f24, $r3, 88 fld.d $f25, $r3, 96 fld.d $f26, $r3, 104 |