diff options
Diffstat (limited to 'src/pkg/runtime/os_linux_arm.c')
-rw-r--r-- | src/pkg/runtime/os_linux_arm.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/src/pkg/runtime/os_linux_arm.c b/src/pkg/runtime/os_linux_arm.c deleted file mode 100644 index aad08b989..000000000 --- a/src/pkg/runtime/os_linux_arm.c +++ /dev/null @@ -1,80 +0,0 @@ -// 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 "runtime.h" -#include "defs_GOOS_GOARCH.h" -#include "os_GOOS.h" -#include "../../cmd/ld/textflag.h" - -#define AT_NULL 0 -#define AT_PLATFORM 15 // introduced in at least 2.6.11 -#define AT_HWCAP 16 // introduced in at least 2.6.11 -#define AT_RANDOM 25 // introduced in 2.6.29 -#define HWCAP_VFP (1 << 6) // introduced in at least 2.6.11 -#define HWCAP_VFPv3 (1 << 13) // introduced in 2.6.30 -static uint32 runtime·randomNumber; -uint8 runtime·armArch = 6; // we default to ARMv6 -uint32 runtime·hwcap; // set by setup_auxv -extern uint8 runtime·goarm; // set by 5l - -void -runtime·checkgoarm(void) -{ - if(runtime·goarm > 5 && !(runtime·hwcap & HWCAP_VFP)) { - runtime·printf("runtime: this CPU has no floating point hardware, so it cannot run\n"); - runtime·printf("this GOARM=%d binary. Recompile using GOARM=5.\n", runtime·goarm); - runtime·exit(1); - } - if(runtime·goarm > 6 && !(runtime·hwcap & HWCAP_VFPv3)) { - runtime·printf("runtime: this CPU has no VFPv3 floating point hardware, so it cannot run\n"); - runtime·printf("this GOARM=%d binary. Recompile using GOARM=6.\n", runtime·goarm); - runtime·exit(1); - } -} - -#pragma textflag NOSPLIT -void -runtime·setup_auxv(int32 argc, byte **argv) -{ - byte **envp; - byte *rnd; - uint32 *auxv; - uint32 t; - - // skip envp to get to ELF auxiliary vector. - for(envp = &argv[argc+1]; *envp != nil; envp++) - ; - envp++; - - for(auxv=(uint32*)envp; auxv[0] != AT_NULL; auxv += 2) { - switch(auxv[0]) { - case AT_RANDOM: // kernel provided 16-byte worth of random data - if(auxv[1]) { - rnd = (byte*)auxv[1]; - runtime·randomNumber = rnd[4] | rnd[5]<<8 | rnd[6]<<16 | rnd[7]<<24; - } - break; - case AT_PLATFORM: // v5l, v6l, v7l - if(auxv[1]) { - t = *(uint8*)(auxv[1]+1); - if(t >= '5' && t <= '7') - runtime·armArch = t - '0'; - } - break; - case AT_HWCAP: // CPU capability bit flags - runtime·hwcap = auxv[1]; - break; - } - } -} - -#pragma textflag NOSPLIT -int64 -runtime·cputicks(void) -{ - // Currently cputicks() is used in blocking profiler and to seed runtime·fastrand1(). - // runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler. - // runtime·randomNumber provides better seeding of fastrand1. - return runtime·nanotime() + runtime·randomNumber; -} |