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Diffstat (limited to 'src/runtime/rt0_linux_arm.s')
| -rw-r--r-- | src/runtime/rt0_linux_arm.s | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/runtime/rt0_linux_arm.s b/src/runtime/rt0_linux_arm.s new file mode 100644 index 0000000..8a5722f --- /dev/null +++ b/src/runtime/rt0_linux_arm.s @@ -0,0 +1,33 @@ +// 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. + +#include "textflag.h" + +TEXT _rt0_arm_linux(SB),NOSPLIT|NOFRAME,$0 + MOVW (R13), R0 // argc + MOVW $4(R13), R1 // argv + MOVW $_rt0_arm_linux1(SB), R4 + B (R4) + +// When building with -buildmode=c-shared, this symbol is called when the shared +// library is loaded. +TEXT _rt0_arm_linux_lib(SB),NOSPLIT,$0 + B _rt0_arm_lib(SB) + +TEXT _rt0_arm_linux1(SB),NOSPLIT|NOFRAME,$0 + // We first need to detect the kernel ABI, and warn the user + // if the system only supports OABI. + // The strategy here is to call some EABI syscall to see if + // SIGILL is received. + // If you get a SIGILL here, you have the wrong kernel. + + // Save argc and argv (syscall will clobber at least R0). + MOVM.DB.W [R0-R1], (R13) + + // do an EABI syscall + MOVW $20, R7 // sys_getpid + SWI $0 // this will trigger SIGILL on OABI systems + + MOVM.IA.W (R13), [R0-R1] + B runtime·rt0_go(SB) |