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https://github.com/golang/go
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af7ca8dce4
This implements support for calls to and from C in the ppc64 C ABI, as well as supporting functionality such as an entry point from the dynamic linker. Change-Id: I68da6df50d5638cb1a3d3fef773fb412d7bf631a Reviewed-on: https://go-review.googlesource.com/2009 Reviewed-by: Russ Cox <rsc@golang.org>
35 lines
871 B
ArmAsm
35 lines
871 B
ArmAsm
#include "textflag.h"
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TEXT _rt0_ppc64le_linux(SB),NOSPLIT,$0
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BR _main<>(SB)
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TEXT _main<>(SB),NOSPLIT,$-8
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// In a statically linked binary, the stack contains argc,
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// argv as argc string pointers followed by a NULL, envv as a
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// sequence of string pointers followed by a NULL, and auxv.
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// There is no TLS base pointer.
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//
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// In a dynamically linked binary, r3 contains argc, r4
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// contains argv, r5 contains envp, r6 contains auxv, and r13
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// contains the TLS pointer.
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//
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// Figure out which case this is by looking at r4: if it's 0,
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// we're statically linked; otherwise we're dynamically
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// linked.
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CMP R0, R4
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BNE dlink
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// Statically linked
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MOVD 0(R1), R3 // argc
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ADD $8, R1, R4 // argv
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MOVD $runtime·tls0(SB), R13 // TLS
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ADD $0x7000, R13
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dlink:
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BR main(SB)
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TEXT main(SB),NOSPLIT,$-8
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MOVD $runtime·rt0_go(SB), R31
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MOVD R31, CTR
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BR (CTR)
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