| #!/bin/sh |
| # Copyright 2009 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. |
| |
| set -e |
| |
| cat <<'EOF' |
| // Assembly constants. |
| // AUTOMATICALLY GENERATED BY mkasmh.sh DURING BUILD |
| |
| EOF |
| |
| case "$GOARCH" in |
| 386) |
| # The offsets 0 and 4 are also known to: |
| # nacl/thread.c:/^newosproc |
| # ../../cmd/8l/pass.c:/D_GS |
| # ../../libcgo/linux_386.c:/^threadentry |
| # ../../libcgo/darwin_386.c:/^threadentry |
| case "$GOOS" in |
| windows) |
| echo '#define get_tls(r) MOVL 0x2c(FS), r' |
| echo '#define g(r) 0(r)' |
| echo '#define m(r) 4(r)' |
| ;; |
| plan9) |
| echo '#define get_tls(r)' |
| echo '#define g(r) 0xdfffefc0' |
| echo '#define m(r) 0xdfffefc4' |
| ;; |
| linux) |
| # On Linux systems, what we call 0(GS) and 4(GS) for g and m |
| # turn into %gs:-8 and %gs:-4 (using gcc syntax to denote |
| # what the machine sees as opposed to 8l input). |
| # 8l rewrites 0(GS) and 4(GS) into these. |
| # |
| # On Linux Xen, it is not allowed to use %gs:-8 and %gs:-4 |
| # directly. Instead, we have to store %gs:0 into a temporary |
| # register and then use -8(%reg) and -4(%reg). This kind |
| # of addressing is correct even when not running Xen. |
| # |
| # 8l can rewrite MOVL 0(GS), CX into the appropriate pair |
| # of mov instructions, using CX as the intermediate register |
| # (safe because CX is about to be written to anyway). |
| # But 8l cannot handle other instructions, like storing into 0(GS), |
| # which is where these macros come into play. |
| # get_tls sets up the temporary and then g and r use it. |
| # |
| # The final wrinkle is that get_tls needs to read from %gs:0, |
| # but in 8l input it's called 8(GS), because 8l is going to |
| # subtract 8 from all the offsets, as described above. |
| echo '#define get_tls(r) MOVL 8(GS), r' |
| echo '#define g(r) -8(r)' |
| echo '#define m(r) -4(r)' |
| ;; |
| *) |
| echo '#define get_tls(r)' |
| echo '#define g(r) 0(GS)' |
| echo '#define m(r) 4(GS)' |
| ;; |
| esac |
| ;; |
| amd64) |
| # The offsets 0 and 8 are known to: |
| # ../../cmd/6l/pass.c:/D_GS |
| # ../../libcgo/linux_amd64.c:/^threadentry |
| # ../../libcgo/darwin_amd64.c:/^threadentry |
| # |
| echo '#define get_tls(r)' |
| echo '#define g(r) 0(GS)' |
| echo '#define m(r) 8(GS)' |
| ;; |
| arm) |
| echo '#define g R10' |
| echo '#define m R9' |
| echo '#define LR R14' |
| ;; |
| *) |
| echo 'unknown $GOARCH: '$GOARCH 1>&2 |
| exit 1 |
| ;; |
| esac |
| echo |
| |
| awk ' |
| /^aggr G$/ { aggr="g" } |
| /^aggr M$/ { aggr = "m" } |
| /^aggr Gobuf$/ { aggr = "gobuf" } |
| /^}/ { aggr = "" } |
| |
| # Gobuf 24 sched; |
| # 'Y' 48 stack0; |
| # 'Y' 56 entry; |
| # 'A' G 64 alllink; |
| aggr != "" && /^ / { |
| name=$NF; |
| sub(/;/, "", name); |
| offset=$(NF-1); |
| printf("#define %s_%s %s\n", aggr, name, offset); |
| } |
| ' runtime.acid.$GOARCH |
| |