Clément Chigot | 9f78aa7 | 2018-09-28 14:54:43 +0200 | [diff] [blame] | 1 | // Copyright 2018 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | #include "textflag.h" |
| 6 | |
| 7 | // _rt0_ppc64_aix is a function descriptor of the entrypoint function |
| 8 | // __start. This name is needed by cmd/link. |
| 9 | DATA _rt0_ppc64_aix+0(SB)/8, $__start<>(SB) |
| 10 | DATA _rt0_ppc64_aix+8(SB)/8, $TOC(SB) |
| 11 | GLOBL _rt0_ppc64_aix(SB), NOPTR, $16 |
| 12 | |
| 13 | |
| 14 | // The starting function must return in the loader to |
| 15 | // initialise some librairies, especially libthread which |
| 16 | // creates the main thread and adds the TLS in R13 |
| 17 | // R19 contains a function descriptor to the loader function |
| 18 | // which needs to be called. |
| 19 | // This code is similar to the __start function in C |
| 20 | TEXT __start<>(SB),NOSPLIT,$-8 |
| 21 | XOR R0, R0 |
| 22 | MOVD $libc___n_pthreads(SB), R4 |
| 23 | MOVD 0(R4), R4 |
| 24 | MOVD $libc___mod_init(SB), R5 |
| 25 | MOVD 0(R5), R5 |
| 26 | MOVD 0(R19), R0 |
| 27 | MOVD R2, 40(R1) |
| 28 | MOVD 8(R19), R2 |
| 29 | MOVD R18, R3 |
| 30 | MOVD R0, CTR |
| 31 | BL (CTR) // Return to AIX loader |
| 32 | |
| 33 | // Launch rt0_go |
| 34 | MOVD 40(R1), R2 |
| 35 | MOVD R14, R3 // argc |
| 36 | MOVD R15, R4 // argv |
| 37 | MOVD $runtime·rt0_go(SB), R12 |
| 38 | MOVD R12, CTR |
| 39 | BR (CTR) |
| 40 | |