diff options
| -rw-r--r-- | src/runtime/rt0_darwin_arm.s | 28 | ||||
| -rw-r--r-- | src/runtime/rt0_darwin_arm64.s | 28 | ||||
| -rw-r--r-- | src/runtime/rt0_linux_arm64.s | 27 |
3 files changed, 61 insertions, 22 deletions
diff --git a/src/runtime/rt0_darwin_arm.s b/src/runtime/rt0_darwin_arm.s index cbbea80ff8..59733d3ff6 100644 --- a/src/runtime/rt0_darwin_arm.s +++ b/src/runtime/rt0_darwin_arm.s @@ -16,12 +16,15 @@ TEXT _rt0_arm_darwin(SB),7,$-4 // // Note that all currently shipping darwin/arm platforms require // cgo and do not support c-shared. -TEXT _rt0_arm_darwin_lib(SB),NOSPLIT,$0 - // R11 is REGTMP, reserved for liblink. It is used below to - // move R0/R1 into globals. However in the darwin ARMv7 calling - // convention, it is a callee-saved register. So we save it to a - // temporary register. - MOVW R11, R2 +TEXT _rt0_arm_darwin_lib(SB),NOSPLIT,$32 + // Preserve callee-save registers. + MOVW R4, 12(R13) + MOVW R5, 16(R13) + MOVW R6, 20(R13) + MOVW R7, 24(R13) + MOVW R8, 28(R13) + MOVW R11, 32(R13) + MOVW R0, _rt0_arm_darwin_lib_argc<>(SB) MOVW R1, _rt0_arm_darwin_lib_argv<>(SB) @@ -35,9 +38,8 @@ TEXT _rt0_arm_darwin_lib(SB),NOSPLIT,$0 B.EQ nocgo MOVW $_rt0_arm_darwin_lib_go(SB), R0 MOVW $0, R1 - MOVW R2, R11 BL (R3) - RET + B rr nocgo: MOVW $0x400000, R0 MOVW R0, (R13) // stacksize @@ -46,10 +48,18 @@ nocgo: MOVW $0, R0 MOVW R0, 8(R13) // fnarg MOVW $runtime·newosproc0(SB), R3 - MOVW R2, R11 BL (R3) +rr: + // Restore callee-save registers and return. + MOVW 12(R13), R4 + MOVW 16(R13), R5 + MOVW 20(R13), R6 + MOVW 24(R13), R7 + MOVW 28(R13), R8 + MOVW 32(R13), R11 RET + TEXT _rt0_arm_darwin_lib_go(SB),NOSPLIT,$0 MOVW _rt0_arm_darwin_lib_argc<>(SB), R0 MOVW _rt0_arm_darwin_lib_argv<>(SB), R1 diff --git a/src/runtime/rt0_darwin_arm64.s b/src/runtime/rt0_darwin_arm64.s index fa676c0abe..0a1feb14a4 100644 --- a/src/runtime/rt0_darwin_arm64.s +++ b/src/runtime/rt0_darwin_arm64.s @@ -16,12 +16,17 @@ TEXT _rt0_arm64_darwin(SB),NOSPLIT,$-8 // // Note that all currently shipping darwin/arm64 platforms require // cgo and do not support c-shared. -TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$0 - // R27 is REGTMP, reserved for liblink. It is used below to - // move R0/R1 into globals. However in the standard ARM64 calling - // convention, it is a callee-saved register. So we save it to a - // temporary register. - MOVD R27, R7 +TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$88 + // Preserve callee-save registers. + MOVD R19, 24(RSP) + MOVD R20, 32(RSP) + MOVD R21, 40(RSP) + MOVD R22, 48(RSP) + MOVD R23, 56(RSP) + MOVD R24, 64(RSP) + MOVD R25, 72(RSP) + MOVD R26, 80(RSP) + MOVD R27, 88(RSP) MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB) MOVD R1, _rt0_arm64_darwin_lib_argv<>(SB) @@ -36,7 +41,16 @@ TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$0 MOVD $0, R1 BL (R4) - MOVD R7, R27 + // Restore callee-save registers. + MOVD 24(RSP), R19 + MOVD 32(RSP), R20 + MOVD 40(RSP), R21 + MOVD 48(RSP), R22 + MOVD 56(RSP), R23 + MOVD 64(RSP), R24 + MOVD 72(RSP), R25 + MOVD 80(RSP), R26 + MOVD 88(RSP), R27 RET TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0 diff --git a/src/runtime/rt0_linux_arm64.s b/src/runtime/rt0_linux_arm64.s index 2b32e35209..31c2367bca 100644 --- a/src/runtime/rt0_linux_arm64.s +++ b/src/runtime/rt0_linux_arm64.s @@ -11,11 +11,17 @@ TEXT _rt0_arm64_linux(SB),NOSPLIT,$-8 // When building with -buildmode=c-shared, this symbol is called when the shared // library is loaded. -TEXT _rt0_arm64_linux_lib(SB),NOSPLIT,$40 - // R27 is REGTMP, reserved for liblink. It is used below to - // move R0/R1 into globals. However in the standard ARM64 calling - // convention, it is a callee-saved register. - MOVD R27, 24(RSP) +TEXT _rt0_arm64_linux_lib(SB),NOSPLIT,$88 + // Preserve callee-save registers. + MOVD R19, 24(RSP) + MOVD R20, 32(RSP) + MOVD R21, 40(RSP) + MOVD R22, 48(RSP) + MOVD R23, 56(RSP) + MOVD R24, 64(RSP) + MOVD R25, 72(RSP) + MOVD R26, 80(RSP) + MOVD R27, 88(RSP) MOVD R0, _rt0_arm64_linux_lib_argc<>(SB) MOVD R1, _rt0_arm64_linux_lib_argv<>(SB) @@ -42,7 +48,16 @@ nocgo: BL (R4) restore: - MOVD 24(RSP), R27 + // Restore callee-save registers. + MOVD 24(RSP), R19 + MOVD 32(RSP), R20 + MOVD 40(RSP), R21 + MOVD 48(RSP), R22 + MOVD 56(RSP), R23 + MOVD 64(RSP), R24 + MOVD 72(RSP), R25 + MOVD 80(RSP), R26 + MOVD 88(RSP), R27 RET TEXT _rt0_arm64_linux_lib_go(SB),NOSPLIT,$0 |