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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This file is used by not only Linux but also other glibc systems
+ * such as GNU/Hurd and GNU/k*BSD.
+ */
+
+#ifndef nspr_linux_defs_h___
+#define nspr_linux_defs_h___
+
+#include "prthread.h"
+
+/*
+ * Internal configuration macros
+ */
+
+#define PR_LINKER_ARCH "linux"
+#define _PR_SI_SYSNAME "LINUX"
+#ifdef __powerpc64__
+#define _PR_SI_ARCHITECTURE "ppc64"
+#elif defined(__powerpc__)
+#define _PR_SI_ARCHITECTURE "ppc"
+#elif defined(__alpha)
+#define _PR_SI_ARCHITECTURE "alpha"
+#elif defined(__ia64__)
+#define _PR_SI_ARCHITECTURE "ia64"
+#elif defined(__x86_64__)
+#define _PR_SI_ARCHITECTURE "x86-64"
+#elif defined(__mc68000__)
+#define _PR_SI_ARCHITECTURE "m68k"
+#elif defined(__sparc__) && defined(__arch64__)
+#define _PR_SI_ARCHITECTURE "sparc64"
+#elif defined(__sparc__)
+#define _PR_SI_ARCHITECTURE "sparc"
+#elif defined(__i386__)
+#define _PR_SI_ARCHITECTURE "x86"
+#elif defined(__mips__)
+#define _PR_SI_ARCHITECTURE "mips"
+#elif defined(__arm__)
+#define _PR_SI_ARCHITECTURE "arm"
+#elif defined(__aarch64__)
+#define _PR_SI_ARCHITECTURE "aarch64"
+#elif defined(__hppa__)
+#define _PR_SI_ARCHITECTURE "hppa"
+#elif defined(__s390x__)
+#define _PR_SI_ARCHITECTURE "s390x"
+#elif defined(__s390__)
+#define _PR_SI_ARCHITECTURE "s390"
+#elif defined(__sh__)
+#define _PR_SI_ARCHITECTURE "sh"
+#elif defined(__avr32__)
+#define _PR_SI_ARCHITECTURE "avr32"
+#elif defined(__m32r__)
+#define _PR_SI_ARCHITECTURE "m32r"
+#elif defined(__or1k__)
+#define _PR_SI_ARCHITECTURE "or1k"
+#elif defined(__riscv) && (__riscv_xlen == 32)
+#define _PR_SI_ARCHITECTURE "riscv32"
+#elif defined(__riscv) && (__riscv_xlen == 64)
+#define _PR_SI_ARCHITECTURE "riscv64"
+#elif defined(__e2k__)
+#define _PR_SI_ARCHITECTURE "e2k"
+#elif defined(__arc__)
+#define _PR_SI_ARCHITECTURE "arc"
+#elif defined(__nios2__)
+#define _PR_SI_ARCHITECTURE "nios2"
+#elif defined(__microblaze__)
+#define _PR_SI_ARCHITECTURE "microblaze"
+#elif defined(__nds32__)
+#define _PR_SI_ARCHITECTURE "nds32"
+#elif defined(__xtensa__)
+#define _PR_SI_ARCHITECTURE "xtensa"
+#elif defined(__loongarch64)
+#define _PR_SI_ARCHITECTURE "loongarch64"
+#else
+#error "Unknown CPU architecture"
+#endif
+#define PR_DLL_SUFFIX ".so"
+
+#define _PR_VMBASE 0x30000000
+#define _PR_STACK_VMBASE 0x50000000
+#define _MD_DEFAULT_STACK_SIZE 65536L
+#define _MD_MMAP_FLAGS MAP_PRIVATE
+
+#if defined(__aarch64__) || defined(__mips__)
+#define _MD_MINIMUM_STACK_SIZE 0x20000
+#endif
+
+#undef HAVE_STACK_GROWING_UP
+
+/*
+ * Elf linux supports dl* functions
+ */
+#define HAVE_DLL
+#define USE_DLFCN
+#if defined(ANDROID)
+#define NO_DLOPEN_NULL
+#endif
+
+#if defined(__FreeBSD_kernel__) || defined(__GNU__)
+#define _PR_HAVE_SOCKADDR_LEN
+#endif
+
+#if defined(__i386__)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+extern PRInt32 _PR_x86_AtomicIncrement(PRInt32 *val);
+#define _MD_ATOMIC_INCREMENT _PR_x86_AtomicIncrement
+extern PRInt32 _PR_x86_AtomicDecrement(PRInt32 *val);
+#define _MD_ATOMIC_DECREMENT _PR_x86_AtomicDecrement
+extern PRInt32 _PR_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val);
+#define _MD_ATOMIC_ADD _PR_x86_AtomicAdd
+extern PRInt32 _PR_x86_AtomicSet(PRInt32 *val, PRInt32 newval);
+#define _MD_ATOMIC_SET _PR_x86_AtomicSet
+#endif
+
+#if defined(__ia64__)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+extern PRInt32 _PR_ia64_AtomicIncrement(PRInt32 *val);
+#define _MD_ATOMIC_INCREMENT _PR_ia64_AtomicIncrement
+extern PRInt32 _PR_ia64_AtomicDecrement(PRInt32 *val);
+#define _MD_ATOMIC_DECREMENT _PR_ia64_AtomicDecrement
+extern PRInt32 _PR_ia64_AtomicAdd(PRInt32 *ptr, PRInt32 val);
+#define _MD_ATOMIC_ADD _PR_ia64_AtomicAdd
+extern PRInt32 _PR_ia64_AtomicSet(PRInt32 *val, PRInt32 newval);
+#define _MD_ATOMIC_SET _PR_ia64_AtomicSet
+#endif
+
+#if defined(__x86_64__)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+extern PRInt32 _PR_x86_64_AtomicIncrement(PRInt32 *val);
+#define _MD_ATOMIC_INCREMENT _PR_x86_64_AtomicIncrement
+extern PRInt32 _PR_x86_64_AtomicDecrement(PRInt32 *val);
+#define _MD_ATOMIC_DECREMENT _PR_x86_64_AtomicDecrement
+extern PRInt32 _PR_x86_64_AtomicAdd(PRInt32 *ptr, PRInt32 val);
+#define _MD_ATOMIC_ADD _PR_x86_64_AtomicAdd
+extern PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval);
+#define _MD_ATOMIC_SET _PR_x86_64_AtomicSet
+#endif
+
+#if defined(__loongarch__)
+#if defined(__GNUC__)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#endif
+#endif
+
+#if defined(__or1k__)
+#if defined(__GNUC__)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#endif
+#endif
+
+#if defined(__powerpc__) && !defined(__powerpc64__)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+extern PRInt32 _PR_ppc_AtomicIncrement(PRInt32 *val);
+#define _MD_ATOMIC_INCREMENT _PR_ppc_AtomicIncrement
+extern PRInt32 _PR_ppc_AtomicDecrement(PRInt32 *val);
+#define _MD_ATOMIC_DECREMENT _PR_ppc_AtomicDecrement
+extern PRInt32 _PR_ppc_AtomicAdd(PRInt32 *ptr, PRInt32 val);
+#define _MD_ATOMIC_ADD _PR_ppc_AtomicAdd
+extern PRInt32 _PR_ppc_AtomicSet(PRInt32 *val, PRInt32 newval);
+#define _MD_ATOMIC_SET _PR_ppc_AtomicSet
+#endif
+
+#if defined(__powerpc64__)
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#endif
+#endif
+
+#if defined(__mips__) && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#endif
+
+#if defined(__alpha)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_ADD(ptr, i) ({ \
+ PRInt32 __atomic_tmp, __atomic_ret; \
+ __asm__ __volatile__( \
+ "1: ldl_l %[ret], %[val] \n" \
+ " addl %[ret], %[inc], %[tmp] \n" \
+ " addl %[ret], %[inc], %[ret] \n" \
+ " stl_c %[tmp], %[val] \n" \
+ " beq %[tmp], 2f \n" \
+ ".subsection 2 \n" \
+ "2: br 1b \n" \
+ ".previous" \
+ : [ret] "=&r" (__atomic_ret), \
+ [tmp] "=&r" (__atomic_tmp), \
+ [val] "=m" (*ptr) \
+ : [inc] "Ir" (i), "m" (*ptr)); \
+ __atomic_ret; \
+})
+#define _MD_ATOMIC_INCREMENT(ptr) _MD_ATOMIC_ADD(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) ({ \
+ PRInt32 __atomic_tmp, __atomic_ret; \
+ __asm__ __volatile__( \
+ "1: ldl_l %[ret], %[val] \n" \
+ " subl %[ret], 1, %[tmp] \n" \
+ " subl %[ret], 1, %[ret] \n" \
+ " stl_c %[tmp], %[val] \n" \
+ " beq %[tmp], 2f \n" \
+ ".subsection 2 \n" \
+ "2: br 1b \n" \
+ ".previous" \
+ : [ret] "=&r" (__atomic_ret), \
+ [tmp] "=&r" (__atomic_tmp), \
+ [val] "=m" (*ptr) \
+ : "m" (*ptr)); \
+ __atomic_ret; \
+})
+#define _MD_ATOMIC_SET(ptr, n) ({ \
+ PRInt32 __atomic_tmp, __atomic_ret; \
+ __asm__ __volatile__( \
+ "1: ldl_l %[ret], %[val] \n" \
+ " mov %[newval], %[tmp] \n" \
+ " stl_c %[tmp], %[val] \n" \
+ " beq %[tmp], 2f \n" \
+ ".subsection 2 \n" \
+ "2: br 1b \n" \
+ ".previous" \
+ : [ret] "=&r" (__atomic_ret), \
+ [tmp] "=&r"(__atomic_tmp), \
+ [val] "=m" (*ptr) \
+ : [newval] "Ir" (n), "m" (*ptr)); \
+ __atomic_ret; \
+})
+#endif
+
+#if defined(__arm__) || defined(__aarch64__)
+#if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+
+#elif defined(_PR_ARM_KUSER)
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+
+/*
+ * The kernel provides this helper function at a fixed address with a fixed
+ * ABI signature, directly callable from user space.
+ *
+ * Definition:
+ * Atomically store newval in *ptr if *ptr is equal to oldval.
+ * Return zero if *ptr was changed or non-zero if no exchange happened.
+ */
+typedef int (__kernel_cmpxchg_t)(int oldval, int newval, volatile int *ptr);
+#define __kernel_cmpxchg (*(__kernel_cmpxchg_t *)0xffff0fc0)
+
+#define _MD_ATOMIC_INCREMENT(ptr) _MD_ATOMIC_ADD(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) _MD_ATOMIC_ADD(ptr, -1)
+
+static inline PRInt32 _MD_ATOMIC_ADD(PRInt32 *ptr, PRInt32 n)
+{
+ PRInt32 ov, nv;
+ volatile PRInt32 *vp = ptr;
+
+ do {
+ ov = *vp;
+ nv = ov + n;
+ } while (__kernel_cmpxchg(ov, nv, vp));
+
+ return nv;
+}
+
+static inline PRInt32 _MD_ATOMIC_SET(PRInt32 *ptr, PRInt32 nv)
+{
+ PRInt32 ov;
+ volatile PRInt32 *vp = ptr;
+
+ do {
+ ov = *vp;
+ } while (__kernel_cmpxchg(ov, nv, vp));
+
+ return ov;
+}
+#endif
+#endif /* __arm__ */
+
+#define USE_SETJMP
+#if (defined(__GLIBC__) && __GLIBC__ >= 2) || defined(ANDROID)
+#define _PR_POLL_AVAILABLE
+#endif
+#undef _PR_USE_POLL
+#define _PR_STAT_HAS_ONLY_ST_ATIME
+#if defined(__alpha) || defined(__ia64__)
+#define _PR_HAVE_LARGE_OFF_T
+#elif (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) \
+ || defined(ANDROID)
+#define _PR_HAVE_OFF64_T
+#else
+#define _PR_NO_LARGE_FILES
+#endif
+#if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) \
+ || defined(ANDROID)
+#define _PR_INET6
+#define _PR_HAVE_INET_NTOP
+#define _PR_HAVE_GETHOSTBYNAME2
+#define _PR_HAVE_GETADDRINFO
+#define _PR_INET6_PROBE
+#endif
+#ifndef ANDROID
+#define _PR_HAVE_SYSV_SEMAPHORES
+#define PR_HAVE_SYSV_NAMED_SHARED_MEMORY
+#endif
+/* Android has gethostbyname_r but not gethostbyaddr_r or gethostbyname2_r. */
+#if (__GLIBC__ >= 2) && defined(_PR_PTHREADS)
+#define _PR_HAVE_GETHOST_R
+#define _PR_HAVE_GETHOST_R_INT
+#endif
+
+#ifdef _PR_PTHREADS
+
+extern void _MD_CleanupBeforeExit(void);
+#define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit
+
+#else /* ! _PR_PTHREADS */
+
+#include <setjmp.h>
+
+#define PR_CONTEXT_TYPE sigjmp_buf
+
+#define CONTEXT(_th) ((_th)->md.context)
+
+#ifdef __powerpc__
+/*
+ * PowerPC based MkLinux
+ *
+ * On the PowerPC, the new style jmp_buf isn't used until glibc
+ * 2.1.
+ */
+#if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_GPR1]
+#else
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__misc[0]
+#endif /* glibc 2.1 or later */
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+/* aix = 64, macos = 70 */
+#define PR_NUM_GCREGS 64
+
+#elif defined(__alpha)
+/* Alpha based Linux */
+
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE long int
+#else
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE __ptr_t
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+/* XXX not sure if this is correct, or maybe it should be 17? */
+#define PR_NUM_GCREGS 9
+
+#elif defined(__ia64__)
+
+#define _MD_GET_SP(_t) ((long *)((_t)->md.context[0].__jmpbuf)[0])
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE long int
+
+#define PR_NUM_GCREGS _JBLEN
+
+#elif defined(__mc68000__)
+/* m68k based Linux */
+
+/*
+ * On the m68k, glibc still uses the old style sigjmp_buf, even
+ * in glibc 2.0.7.
+ */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE int
+#else
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE __ptr_t
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+/* XXX not sure if this is correct, or maybe it should be 17? */
+#define PR_NUM_GCREGS 9
+
+#elif defined(__sparc__)
+/* Sparc */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+/*
+ * You need glibc2-2.0.7-25 or later. The libraries that came with
+ * Red Hat 5.1 are not new enough, but they are in 5.2.
+ */
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_FP] = val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_FP])
+#define _MD_SP_TYPE int
+#else
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__fp
+#define _MD_SET_FP(_t, val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) ((void *) 0)
+#define _MD_SP_TYPE __ptr_t
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+#elif defined(__i386__)
+/* Intel based Linux */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_BP] = val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_BP])
+#define _MD_SP_TYPE int
+#else
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__bp = val)
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) &((_t)->md.context[0].__jmpbuf[0].__bp)
+#define _MD_SP_TYPE __ptr_t
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+#define PR_NUM_GCREGS 6
+
+#elif defined(__mips__)
+/* Linux/MIPS */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__fp = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[0].__fp)
+#define _MD_SP_TYPE __ptr_t
+#else
+#error "Linux/MIPS pre-glibc2 not supported yet"
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+#elif defined(__arm__)
+/* ARM/Linux */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#ifdef __ARM_EABI__
+/* EABI */
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[8]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[7] = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[7])
+#define _MD_SP_TYPE __ptr_t
+#else /* __ARM_EABI__ */
+/* old ABI */
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[20]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[19] = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[19])
+#define _MD_SP_TYPE __ptr_t
+#endif /* __ARM_EABI__ */
+#else
+#error "ARM/Linux pre-glibc2 not supported yet"
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+#elif defined(__sh__)
+/* SH/Linux */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[7]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[6] = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[6])
+#define _MD_SP_TYPE __ptr_t
+#else
+#error "SH/Linux pre-glibc2 not supported yet"
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+#elif defined(__m32r__)
+/* Linux/M32R */
+#if defined(__GLIBC__) && __GLIBC__ >= 2
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__regs[JB_SP]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__regs[JB_FP] = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[0].__regs[JB_FP])
+#define _MD_SP_TYPE __ptr_t
+#else
+#error "Linux/M32R pre-glibc2 not supported yet"
+#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
+
+#else
+
+#error "Unknown CPU architecture"
+
+#endif /*__powerpc__*/
+
+/*
+** Initialize a thread context to run "_main()" when started
+*/
+#ifdef __powerpc__
+
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
+{ \
+ *status = PR_TRUE; \
+ if (sigsetjmp(CONTEXT(_thread), 1)) { \
+ _main(); \
+ } \
+ _MD_GET_SP(_thread) = (unsigned char*) ((_sp) - 128); \
+ _thread->md.sp = _MD_GET_SP_PTR(_thread); \
+ _thread->md.fp = _MD_GET_FP_PTR(_thread); \
+ _MD_SET_FP(_thread, 0); \
+}
+
+#elif defined(__mips__)
+
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
+{ \
+ *status = PR_TRUE; \
+ (void) sigsetjmp(CONTEXT(_thread), 1); \
+ _thread->md.context[0].__jmpbuf[0].__pc = (__ptr_t) _main; \
+ _MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
+ _thread->md.sp = _MD_GET_SP_PTR(_thread); \
+ _thread->md.fp = _MD_GET_FP_PTR(_thread); \
+ _MD_SET_FP(_thread, 0); \
+}
+
+#else
+
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
+{ \
+ *status = PR_TRUE; \
+ if (sigsetjmp(CONTEXT(_thread), 1)) { \
+ _main(); \
+ } \
+ _MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
+ _thread->md.sp = _MD_GET_SP_PTR(_thread); \
+ _thread->md.fp = _MD_GET_FP_PTR(_thread); \
+ _MD_SET_FP(_thread, 0); \
+}
+
+#endif /*__powerpc__*/
+
+#define _MD_SWITCH_CONTEXT(_thread) \
+ if (!sigsetjmp(CONTEXT(_thread), 1)) { \
+ (_thread)->md.errcode = errno; \
+ _PR_Schedule(); \
+ }
+
+/*
+** Restore a thread context, saved by _MD_SWITCH_CONTEXT
+*/
+#define _MD_RESTORE_CONTEXT(_thread) \
+{ \
+ errno = (_thread)->md.errcode; \
+ _MD_SET_CURRENT_THREAD(_thread); \
+ siglongjmp(CONTEXT(_thread), 1); \
+}
+
+/* Machine-dependent (MD) data structures */
+
+struct _MDThread {
+ PR_CONTEXT_TYPE context;
+ void *sp;
+ void *fp;
+ int id;
+ int errcode;
+};
+
+struct _MDThreadStack {
+ PRInt8 notused;
+};
+
+struct _MDLock {
+ PRInt8 notused;
+};
+
+struct _MDSemaphore {
+ PRInt8 notused;
+};
+
+struct _MDCVar {
+ PRInt8 notused;
+};
+
+struct _MDSegment {
+ PRInt8 notused;
+};
+
+/*
+ * md-specific cpu structure field
+ */
+#include <sys/time.h> /* for FD_SETSIZE */
+#define _PR_MD_MAX_OSFD FD_SETSIZE
+
+struct _MDCPU_Unix {
+ PRCList ioQ;
+ PRUint32 ioq_timeout;
+ PRInt32 ioq_max_osfd;
+ PRInt32 ioq_osfd_cnt;
+#ifndef _PR_USE_POLL
+ fd_set fd_read_set, fd_write_set, fd_exception_set;
+ PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
+ fd_exception_cnt[_PR_MD_MAX_OSFD];
+#else
+ struct pollfd *ioq_pollfds;
+ int ioq_pollfds_size;
+#endif /* _PR_USE_POLL */
+};
+
+#define _PR_IOQ(_cpu) ((_cpu)->md.md_unix.ioQ)
+#define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
+#define _PR_FD_READ_SET(_cpu) ((_cpu)->md.md_unix.fd_read_set)
+#define _PR_FD_READ_CNT(_cpu) ((_cpu)->md.md_unix.fd_read_cnt)
+#define _PR_FD_WRITE_SET(_cpu) ((_cpu)->md.md_unix.fd_write_set)
+#define _PR_FD_WRITE_CNT(_cpu) ((_cpu)->md.md_unix.fd_write_cnt)
+#define _PR_FD_EXCEPTION_SET(_cpu) ((_cpu)->md.md_unix.fd_exception_set)
+#define _PR_FD_EXCEPTION_CNT(_cpu) ((_cpu)->md.md_unix.fd_exception_cnt)
+#define _PR_IOQ_TIMEOUT(_cpu) ((_cpu)->md.md_unix.ioq_timeout)
+#define _PR_IOQ_MAX_OSFD(_cpu) ((_cpu)->md.md_unix.ioq_max_osfd)
+#define _PR_IOQ_OSFD_CNT(_cpu) ((_cpu)->md.md_unix.ioq_osfd_cnt)
+#define _PR_IOQ_POLLFDS(_cpu) ((_cpu)->md.md_unix.ioq_pollfds)
+#define _PR_IOQ_POLLFDS_SIZE(_cpu) ((_cpu)->md.md_unix.ioq_pollfds_size)
+
+#define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu) 32
+
+struct _MDCPU {
+ struct _MDCPU_Unix md_unix;
+};
+
+#define _MD_INIT_LOCKS()
+#define _MD_NEW_LOCK(lock) PR_SUCCESS
+#define _MD_FREE_LOCK(lock)
+#define _MD_LOCK(lock)
+#define _MD_UNLOCK(lock)
+#define _MD_INIT_IO()
+#define _MD_IOQ_LOCK()
+#define _MD_IOQ_UNLOCK()
+
+extern PRStatus _MD_InitializeThread(PRThread *thread);
+
+#define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
+#define _MD_INIT_THREAD _MD_InitializeThread
+#define _MD_EXIT_THREAD(thread)
+#define _MD_SUSPEND_THREAD(thread) _MD_suspend_thread
+#define _MD_RESUME_THREAD(thread) _MD_resume_thread
+#define _MD_CLEAN_THREAD(_thread)
+
+extern PRStatus _MD_CREATE_THREAD(
+ PRThread *thread,
+ void (*start) (void *),
+ PRThreadPriority priority,
+ PRThreadScope scope,
+ PRThreadState state,
+ PRUint32 stackSize);
+extern void _MD_SET_PRIORITY(struct _MDThread *thread, PRUintn newPri);
+extern PRStatus _MD_WAIT(PRThread *, PRIntervalTime timeout);
+extern PRStatus _MD_WAKEUP_WAITER(PRThread *);
+extern void _MD_YIELD(void);
+
+#endif /* ! _PR_PTHREADS */
+
+extern void _MD_EarlyInit(void);
+
+#define _MD_EARLY_INIT _MD_EarlyInit
+#define _MD_FINAL_INIT _PR_UnixInit
+#define _PR_HAVE_CLOCK_MONOTONIC
+
+/*
+ * We wrapped the select() call. _MD_SELECT refers to the built-in,
+ * unwrapped version.
+ */
+#define _MD_SELECT __select
+
+#ifdef _PR_POLL_AVAILABLE
+#include <sys/poll.h>
+extern int __syscall_poll(struct pollfd *ufds, unsigned long int nfds,
+ int timeout);
+#define _MD_POLL __syscall_poll
+#endif
+
+/* For writev() */
+#include <sys/uio.h>
+
+extern void _MD_linux_map_sendfile_error(int err);
+
+#endif /* nspr_linux_defs_h___ */