https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253335
--- Comment #9 from Mark Johnston <ma...@freebsd.org> ---
qemu is doing the mprotect here:
Thread 1 hit Catchpoint 1 (call to syscall mprotect), 0x000000006049f48a in ??
()
(gdb) bt
#0 0x000000006049f48a in ?? ()
#1 0x00000000602b413a in page_find_alloc (index=5, alloc=1)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/accel/tcg/translate-all.c:497
#2 page_lock_pair (ret_p1=<optimized out>, phys1=4095827272, ret_p2=<optimized
out>, phys2=4294967295, alloc=1)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/accel/tcg/translate-all.c:882
#3 tb_link_page (tb=0x60598280 <static_code_gen_buffer+166752>,
phys_pc=4095827272, phys_page2=4294967295)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/accel/tcg/translate-all.c:1628
#4 tb_gen_code (cpu=<optimized out>, pc=<optimized out>, cs_base=0,
flags=1626480128, cflags=<optimized out>)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/accel/tcg/translate-all.c:1831
#5 0x00000000602b2a95 in cpu_loop_exit_restore (cpu=0xf4215000, pc=4096)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/accel/tcg/cpu-exec-common.c:72
#6 0x00000000602c2ff1 in target_cpu_loop (env=0x0)
at
/usr/home/markj/src/freebsd-ports/emulators/qemu-user-static/work/qemu-bsd-user-39244526c0af/bsd-user/arm/target_arch_cpu.h:259
#7 0x00000000602c2f89 in target_cpu_loop (env=0x860933c00)
In tb_page_add() I see:
1560 /* force the host page as non writable (writes will have a
1561 page fault + mprotect overhead) */
but it looks like something's not implementing that...?
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