diff options
Diffstat (limited to 'libpthread/linuxthreads/sysdeps')
4 files changed, 134 insertions, 26 deletions
diff --git a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h index fc17e9bc7..3250961cf 100644 --- a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h +++ b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h @@ -28,36 +28,20 @@ # define PT_EI __extern_always_inline #endif -#if defined(__thumb2__) -PT_EI long int ldrex(int *spinlock) -{ - long int ret; - __asm__ __volatile__( - "ldrex %0, [%1]\n" - : "=r"(ret) - : "r"(spinlock) : "memory"); - return ret; -} - -PT_EI long int strex(int val, int *spinlock) -{ - long int ret; - __asm__ __volatile__( - "strex %0, %1, [%2]\n" - : "=r"(ret) - : "r" (val), "r"(spinlock) : "memory"); - return ret; -} - +#if __ARM_ARCH >= 7 || defined(__thumb2__) /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { - register unsigned int ret; - - do { - ret = ldrex(spinlock); - } while (strex(1, spinlock)); + unsigned int ret, tmp, val = 1; + + __asm__ __volatile__ ( +"0: ldrex %0, [%2] \n" +" strex %1, %3, [%2] \n" +" cmp %1, #0 \n" +" bne 0b" + : "=&r" (ret), "=&r" (tmp) + : "r" (spinlock), "r" (val) : "memory", "cc"); return ret; } diff --git a/libpthread/linuxthreads/sysdeps/pthread/not-cancel.h b/libpthread/linuxthreads/sysdeps/pthread/not-cancel.h index bbdb0739c..6d7c4d70a 100644 --- a/libpthread/linuxthreads/sysdeps/pthread/not-cancel.h +++ b/libpthread/linuxthreads/sysdeps/pthread/not-cancel.h @@ -19,6 +19,7 @@ #include <sys/types.h> #include <sysdep.h> +#include <time.h> /* Uncancelable open. */ #if defined __NR_openat && !defined __NR_open @@ -104,6 +105,7 @@ extern int __openat64_nocancel (int fd, const char *fname, int oflag, # define nanosleep_not_cancel(requested_time, remaining) \ INLINE_SYSCALL (nanosleep, 2, requested_time, remaining) #else +extern int __nanosleep_nocancel (const struct timespec *requested_time, struct timespec *remaining); # define nanosleep_not_cancel(requested_time, remaining) \ __nanosleep_nocancel (requested_time, remaining) #endif diff --git a/libpthread/linuxthreads/sysdeps/riscv32/pt-machine.h b/libpthread/linuxthreads/sysdeps/riscv32/pt-machine.h new file mode 100644 index 000000000..38f0d8eff --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/riscv32/pt-machine.h @@ -0,0 +1,61 @@ +/* + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 +#include <features.h> + +#ifndef PT_EI +# define PT_EI __extern_always_inline +#endif + +#define HAS_COMPARE_AND_SWAP +PT_EI int +__compare_and_swap (long int *p, long int oldval, long int newval) +{ + long int ret, temp; + + __asm__ __volatile__ + ("/* Inline compare & swap */\n" + "1:\n\t" + "lr.w %1,%2\n\t" + "li %0,0\n\t" + "bne %1,%3,2f\n\t" + "li %0,1\n\t" + "sc.w %1,%4,%2\n\t" + "bnez %1,1b\n" + "2:\n\t" + "/* End compare & swap */" + : "=&r" (ret), "=&r" (temp), "+A" (*p) + : "r" (oldval), "r" (newval) + : "memory"); + + return ret; +} + +extern long int testandset (int *spinlock); + +PT_EI long int +testandset (int *spinlock) +{ + unsigned int old = 1; + int tmp = 1; + + __asm__ __volatile__ ( + "amoswap.w %0, %2, %1" + : "=r" (old), "+A" (*spinlock) + : "r" (tmp) + : "memory"); + + return old; +} + +/* Get some notion of the current stack. Need not be exactly the top + of the stack, just something somewhere in the current frame. */ +#define CURRENT_STACK_FRAME stack_pointer +register char * stack_pointer __asm__ ("sp"); + +#else +#error PT_MACHINE already defined +#endif /* pt-machine.h */ diff --git a/libpthread/linuxthreads/sysdeps/riscv64/pt-machine.h b/libpthread/linuxthreads/sysdeps/riscv64/pt-machine.h new file mode 100644 index 000000000..d83057669 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/riscv64/pt-machine.h @@ -0,0 +1,61 @@ +/* + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 +#include <features.h> + +#ifndef PT_EI +# define PT_EI __extern_always_inline +#endif + +#define HAS_COMPARE_AND_SWAP +PT_EI int +__compare_and_swap (long int *p, long int oldval, long int newval) +{ + long int ret, temp; + + __asm__ __volatile__ + ("/* Inline compare & swap */\n" + "1:\n\t" + "lr.d %1,%2\n\t" + "li %0,0\n\t" + "bne %1,%3,2f\n\t" + "li %0,1\n\t" + "sc.d %1,%4,%2\n\t" + "bnez %1,1b\n" + "2:\n\t" + "/* End compare & swap */" + : "=&r" (ret), "=&r" (temp), "+A" (*p) + : "r" (oldval), "r" (newval) + : "memory"); + + return ret; +} + +extern long int testandset (int *spinlock); + +PT_EI long int +testandset (int *spinlock) +{ + unsigned int old = 1; + int tmp = 1; + + __asm__ __volatile__ ( + "amoswap.w %0, %2, %1" + : "=r" (old), "+A" (*spinlock) + : "r" (tmp) + : "memory"); + + return old; +} + +/* Get some notion of the current stack. Need not be exactly the top + of the stack, just something somewhere in the current frame. */ +#define CURRENT_STACK_FRAME stack_pointer +register char * stack_pointer __asm__ ("sp"); + +#else +#error PT_MACHINE already defined +#endif /* pt-machine.h */ |