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Editing: rt0_aix_ppc64.s
// 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 $runtime·rt0_go(SB), R12 MOVD R12, CTR BR (CTR) // Paramater save space required to cross-call into _cgo_sys_thread_create #define PARAM_SPACE 16 TEXT _rt0_ppc64_aix_lib(SB),NOSPLIT,$-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-PARAM_SPACE(R1) // Allocate frame. // Preserve callee-save registers. MOVD R14, 48+PARAM_SPACE(R1) MOVD R15, 56+PARAM_SPACE(R1) MOVD R16, 64+PARAM_SPACE(R1) MOVD R17, 72+PARAM_SPACE(R1) MOVD R18, 80+PARAM_SPACE(R1) MOVD R19, 88+PARAM_SPACE(R1) MOVD R20, 96+PARAM_SPACE(R1) MOVD R21,104+PARAM_SPACE(R1) MOVD R22, 112+PARAM_SPACE(R1) MOVD R23, 120+PARAM_SPACE(R1) MOVD R24, 128+PARAM_SPACE(R1) MOVD R25, 136+PARAM_SPACE(R1) MOVD R26, 144+PARAM_SPACE(R1) MOVD R27, 152+PARAM_SPACE(R1) MOVD R28, 160+PARAM_SPACE(R1) MOVD R29, 168+PARAM_SPACE(R1) MOVD g, 176+PARAM_SPACE(R1) // R30 MOVD R31, 184+PARAM_SPACE(R1) FMOVD F14, 192+PARAM_SPACE(R1) FMOVD F15, 200+PARAM_SPACE(R1) FMOVD F16, 208+PARAM_SPACE(R1) FMOVD F17, 216+PARAM_SPACE(R1) FMOVD F18, 224+PARAM_SPACE(R1) FMOVD F19, 232+PARAM_SPACE(R1) FMOVD F20, 240+PARAM_SPACE(R1) FMOVD F21, 248+PARAM_SPACE(R1) FMOVD F22, 256+PARAM_SPACE(R1) FMOVD F23, 264+PARAM_SPACE(R1) FMOVD F24, 272+PARAM_SPACE(R1) FMOVD F25, 280+PARAM_SPACE(R1) FMOVD F26, 288+PARAM_SPACE(R1) FMOVD F27, 296+PARAM_SPACE(R1) FMOVD F28, 304+PARAM_SPACE(R1) FMOVD F29, 312+PARAM_SPACE(R1) FMOVD F30, 320+PARAM_SPACE(R1) FMOVD F31, 328+PARAM_SPACE(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+PARAM_SPACE(R1), R14 MOVD 56+PARAM_SPACE(R1), R15 MOVD 64+PARAM_SPACE(R1), R16 MOVD 72+PARAM_SPACE(R1), R17 MOVD 80+PARAM_SPACE(R1), R18 MOVD 88+PARAM_SPACE(R1), R19 MOVD 96+PARAM_SPACE(R1), R20 MOVD 104+PARAM_SPACE(R1), R21 MOVD 112+PARAM_SPACE(R1), R22 MOVD 120+PARAM_SPACE(R1), R23 MOVD 128+PARAM_SPACE(R1), R24 MOVD 136+PARAM_SPACE(R1), R25 MOVD 144+PARAM_SPACE(R1), R26 MOVD 152+PARAM_SPACE(R1), R27 MOVD 160+PARAM_SPACE(R1), R28 MOVD 168+PARAM_SPACE(R1), R29 MOVD 176+PARAM_SPACE(R1), g // R30 MOVD 184+PARAM_SPACE(R1), R31 FMOVD 196+PARAM_SPACE(R1), F14 FMOVD 200+PARAM_SPACE(R1), F15 FMOVD 208+PARAM_SPACE(R1), F16 FMOVD 216+PARAM_SPACE(R1), F17 FMOVD 224+PARAM_SPACE(R1), F18 FMOVD 232+PARAM_SPACE(R1), F19 FMOVD 240+PARAM_SPACE(R1), F20 FMOVD 248+PARAM_SPACE(R1), F21 FMOVD 256+PARAM_SPACE(R1), F22 FMOVD 264+PARAM_SPACE(R1), F23 FMOVD 272+PARAM_SPACE(R1), F24 FMOVD 280+PARAM_SPACE(R1), F25 FMOVD 288+PARAM_SPACE(R1), F26 FMOVD 296+PARAM_SPACE(R1), F27 FMOVD 304+PARAM_SPACE(R1), F28 FMOVD 312+PARAM_SPACE(R1), F29 FMOVD 320+PARAM_SPACE(R1), F30 FMOVD 328+PARAM_SPACE(R1), F31 ADD $344+PARAM_SPACE, 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
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