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7082645: Hotspot doesn't compile on old linuxes after 7060836

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Move syscall ids definitions into os_linux.cpp

Reviewed-by: johnc
This commit is contained in:
Igor Veresov 2011-08-29 17:42:39 -07:00
parent 1bec3a1bd3
commit d8fd276e35
1 changed files with 9 additions and 4 deletions
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13
hotspot/src/os/linux/vm/os_linux.cpp
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@ -125,10 +125,6 @@
# include <inttypes.h>
# include <sys/ioctl.h>
#ifdef AMD64
#include <asm/vsyscall.h>
#endif
#define MAX_PATH (2 * K)
// for timer info max values which include all bits
@ -2600,8 +2596,17 @@ int os::Linux::sched_getcpu_syscall(void) {
int retval = -1;
#if defined(IA32)
# ifndef SYS_getcpu
# define SYS_getcpu 318
# endif
retval = syscall(SYS_getcpu, &cpu, NULL, NULL);
#elif defined(AMD64)
// Unfortunately we have to bring all these macros here from vsyscall.h
// to be able to compile on old linuxes.
# define __NR_vgetcpu 2
# define VSYSCALL_START (-10UL << 20)
# define VSYSCALL_SIZE 1024
# define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache);
vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu);
retval = vgetcpu(&cpu, NULL, NULL);