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8358593: Add ucontext accessors for *BSD on Aarch64

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Co-authored-by: Greg Lewis <glewis@eyesbeyond.com>
Co-authored-by: Kurt Miller <bsdkurt@gmail.com>
Reviewed-by: aph
This commit is contained in:
Harald Eilertsen 2025-06-06 08:16:37 +00:00 committed by Andrew Haley
parent d1b788005b
commit 65fda5c02a
1 changed files with 27 additions and 2 deletions
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29
src/hotspot/os_cpu/bsd_aarch64/os_bsd_aarch64.cpp
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@ -81,14 +81,12 @@
#endif
#define SPELL_REG_SP "sp"
#define SPELL_REG_FP "fp"
#ifdef __APPLE__
// see darwin-xnu/osfmk/mach/arm/_structs.h
// 10.5 UNIX03 member name prefixes
#define DU3_PREFIX(s, m) __ ## s.__ ## m
#endif
#define context_x uc_mcontext->DU3_PREFIX(ss,x)
#define context_fp uc_mcontext->DU3_PREFIX(ss,fp)
@ -97,6 +95,31 @@
#define context_pc uc_mcontext->DU3_PREFIX(ss,pc)
#define context_cpsr uc_mcontext->DU3_PREFIX(ss,cpsr)
#define context_esr uc_mcontext->DU3_PREFIX(es,esr)
#endif
#ifdef __FreeBSD__
# define context_x uc_mcontext.mc_gpregs.gp_x
# define context_fp context_x[REG_FP]
# define context_lr uc_mcontext.mc_gpregs.gp_lr
# define context_sp uc_mcontext.mc_gpregs.gp_sp
# define context_pc uc_mcontext.mc_gpregs.gp_elr
#endif
#ifdef __NetBSD__
# define context_x uc_mcontext.__gregs
# define context_fp uc_mcontext.__gregs[_REG_FP]
# define context_lr uc_mcontext.__gregs[_REG_LR]
# define context_sp uc_mcontext.__gregs[_REG_SP]
# define context_pc uc_mcontext.__gregs[_REG_ELR]
#endif
#ifdef __OpenBSD__
# define context_x sc_x
# define context_fp sc_x[REG_FP]
# define context_lr sc_lr
# define context_sp sc_sp
# define context_pc sc_elr
#endif
#define REG_BCP context_x[22]
@ -497,9 +520,11 @@ int os::extra_bang_size_in_bytes() {
return 0;
}
#ifdef __APPLE__
void os::current_thread_enable_wx(WXMode mode) {
pthread_jit_write_protect_np(mode == WXExec);
}
#endif
static inline void atomic_copy64(const volatile void *src, volatile void *dst) {
*(jlong *) dst = *(const jlong *) src;