| // Copyright 2018 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "textflag.h" |
| #include "asm_ppc64x.h" |
| |
| // _rt0_ppc64_aix is a function descriptor of the entrypoint function |
| // __start. This name is needed by cmd/link. |
| DEFINE_PPC64X_FUNCDESC(_rt0_ppc64_aix, __start<>) |
| |
| // The starting function must return in the loader to |
| // initialise some libraries, especially libthread which |
| // creates the main thread and adds the TLS in R13 |
| // R19 contains a function descriptor to the loader function |
| // which needs to be called. |
| // This code is similar to the __start function in C |
| TEXT __start<>(SB),NOSPLIT,$-8 |
| XOR R0, R0 |
| MOVD $libc___n_pthreads(SB), R4 |
| MOVD 0(R4), R4 |
| MOVD $libc___mod_init(SB), R5 |
| MOVD 0(R5), R5 |
| MOVD 0(R19), R0 |
| MOVD R2, 40(R1) |
| MOVD 8(R19), R2 |
| MOVD R18, R3 |
| MOVD R0, CTR |
| BL (CTR) // Return to AIX loader |
| |
| // Launch rt0_go |
| MOVD 40(R1), R2 |
| MOVD R14, R3 // argc |
| MOVD R15, R4 // argv |
| BL _main(SB) |
| |
| |
| DEFINE_PPC64X_FUNCDESC(main, _main) |
| TEXT _main(SB),NOSPLIT,$-8 |
| MOVD $runtime·rt0_go(SB), R12 |
| MOVD R12, CTR |
| BR (CTR) |
| |
| |
| TEXT _rt0_ppc64_aix_lib(SB),NOSPLIT,$-8 |
| // Start with standard C stack frame layout and linkage. |
| MOVD LR, R0 |
| MOVD R0, 16(R1) // Save LR in caller's frame. |
| MOVW CR, R0 // Save CR in caller's frame |
| MOVD R0, 8(R1) |
| |
| MOVDU R1, -344(R1) // Allocate frame. |
| |
| // Preserve callee-save registers. |
| MOVD R14, 48(R1) |
| MOVD R15, 56(R1) |
| MOVD R16, 64(R1) |
| MOVD R17, 72(R1) |
| MOVD R18, 80(R1) |
| MOVD R19, 88(R1) |
| MOVD R20, 96(R1) |
| MOVD R21,104(R1) |
| MOVD R22, 112(R1) |
| MOVD R23, 120(R1) |
| MOVD R24, 128(R1) |
| MOVD R25, 136(R1) |
| MOVD R26, 144(R1) |
| MOVD R27, 152(R1) |
| MOVD R28, 160(R1) |
| MOVD R29, 168(R1) |
| MOVD g, 176(R1) // R30 |
| MOVD R31, 184(R1) |
| FMOVD F14, 192(R1) |
| FMOVD F15, 200(R1) |
| FMOVD F16, 208(R1) |
| FMOVD F17, 216(R1) |
| FMOVD F18, 224(R1) |
| FMOVD F19, 232(R1) |
| FMOVD F20, 240(R1) |
| FMOVD F21, 248(R1) |
| FMOVD F22, 256(R1) |
| FMOVD F23, 264(R1) |
| FMOVD F24, 272(R1) |
| FMOVD F25, 280(R1) |
| FMOVD F26, 288(R1) |
| FMOVD F27, 296(R1) |
| FMOVD F28, 304(R1) |
| FMOVD F29, 312(R1) |
| FMOVD F30, 320(R1) |
| FMOVD F31, 328(R1) |
| |
| // Synchronous initialization. |
| MOVD $runtime·reginit(SB), R12 |
| MOVD R12, CTR |
| BL (CTR) |
| |
| MOVBZ runtime·isarchive(SB), R3 // Check buildmode = c-archive |
| CMP $0, R3 |
| BEQ done |
| |
| MOVD R14, _rt0_ppc64_aix_lib_argc<>(SB) |
| MOVD R15, _rt0_ppc64_aix_lib_argv<>(SB) |
| |
| MOVD $runtime·libpreinit(SB), R12 |
| MOVD R12, CTR |
| BL (CTR) |
| |
| // Create a new thread to do the runtime initialization and return. |
| MOVD _cgo_sys_thread_create(SB), R12 |
| CMP $0, R12 |
| BEQ nocgo |
| MOVD $_rt0_ppc64_aix_lib_go(SB), R3 |
| MOVD $0, R4 |
| MOVD R2, 40(R1) |
| MOVD 8(R12), R2 |
| MOVD (R12), R12 |
| MOVD R12, CTR |
| BL (CTR) |
| MOVD 40(R1), R2 |
| BR done |
| |
| nocgo: |
| MOVD $0x800000, R12 // stacksize = 8192KB |
| MOVD R12, 8(R1) |
| MOVD $_rt0_ppc64_aix_lib_go(SB), R12 |
| MOVD R12, 16(R1) |
| MOVD $runtime·newosproc0(SB),R12 |
| MOVD R12, CTR |
| BL (CTR) |
| |
| done: |
| // Restore saved registers. |
| MOVD 48(R1), R14 |
| MOVD 56(R1), R15 |
| MOVD 64(R1), R16 |
| MOVD 72(R1), R17 |
| MOVD 80(R1), R18 |
| MOVD 88(R1), R19 |
| MOVD 96(R1), R20 |
| MOVD 104(R1), R21 |
| MOVD 112(R1), R22 |
| MOVD 120(R1), R23 |
| MOVD 128(R1), R24 |
| MOVD 136(R1), R25 |
| MOVD 144(R1), R26 |
| MOVD 152(R1), R27 |
| MOVD 160(R1), R28 |
| MOVD 168(R1), R29 |
| MOVD 176(R1), g // R30 |
| MOVD 184(R1), R31 |
| FMOVD 196(R1), F14 |
| FMOVD 200(R1), F15 |
| FMOVD 208(R1), F16 |
| FMOVD 216(R1), F17 |
| FMOVD 224(R1), F18 |
| FMOVD 232(R1), F19 |
| FMOVD 240(R1), F20 |
| FMOVD 248(R1), F21 |
| FMOVD 256(R1), F22 |
| FMOVD 264(R1), F23 |
| FMOVD 272(R1), F24 |
| FMOVD 280(R1), F25 |
| FMOVD 288(R1), F26 |
| FMOVD 296(R1), F27 |
| FMOVD 304(R1), F28 |
| FMOVD 312(R1), F29 |
| FMOVD 320(R1), F30 |
| FMOVD 328(R1), F31 |
| |
| ADD $344, R1 |
| |
| MOVD 8(R1), R0 |
| MOVFL R0, $0xff |
| MOVD 16(R1), R0 |
| MOVD R0, LR |
| RET |
| |
| DEFINE_PPC64X_FUNCDESC(_rt0_ppc64_aix_lib_go, __rt0_ppc64_aix_lib_go) |
| |
| TEXT __rt0_ppc64_aix_lib_go(SB),NOSPLIT,$0 |
| MOVD _rt0_ppc64_aix_lib_argc<>(SB), R3 |
| MOVD _rt0_ppc64_aix_lib_argv<>(SB), R4 |
| MOVD $runtime·rt0_go(SB), R12 |
| MOVD R12, CTR |
| BR (CTR) |
| |
| DATA _rt0_ppc64_aix_lib_argc<>(SB)/8, $0 |
| GLOBL _rt0_ppc64_aix_lib_argc<>(SB),NOPTR, $8 |
| DATA _rt0_ppc64_aix_lib_argv<>(SB)/8, $0 |
| GLOBL _rt0_ppc64_aix_lib_argv<>(SB),NOPTR, $8 |
