TCG上下文中有code_gen_*等字段, 指向生成的Host指令 /* 指令生成器的上下文 code generation context */TCGContexttcg_ctx;structTCGContext{...;void*code_gen_prologue;//生成的TCG序言指令void*code_gen_epilogue;//生成的TCG收尾指令void*code_gen_buffer;//保存生成的指令的缓冲区size_tcode_gen_buffer_s...
code_gen_buffer cpu_tb_exec cpu_loop_exec_tb cpu_exec tcg_cpu_exec qemu_tcg_cpu_thread_fn libpthread.so.0!start_thread libc.so.6!clone 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 从这个虚拟cpu的线程调用函数来看,基本就是cpu...
code_gen_buffer cpu_tb_exec cpu_loop_exec_tb cpu_exec tcg_cpu_exec qemu_tcg_cpu_thread_fn 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 关于vcpu通过TCG生成的代码操作io也就是操作io仿真的内存后,就会调用io_writew,其中peripheral_write_callbac...
调用alloc_buffer会在热循环中阻塞,直到缓冲区可用。重要的是,用户要以尽可能快的速度使用数据,以防止发送方停顿太长时间。使用正确的可调参数,用户应该总是领先于运营程序,因此 alloc_buffer 应该立即有效地返回。 当通过 alloc_buffer 获得缓冲区时,应保证为发送进程所有,因此我们可以安全地可变地写入它。内存是未...
tcg_out_qemu_st_direct: 0x7ffff4188925 <code_gen_buffer+22776>: movbe %ebx,(%rsi) The TLB verification implementation can also be found in the QEMU cpu_ld/st_xxx API functions. As defined in the documentation, they operate on guest virtual addresses and may cause guest CPU exception. ...
#define MIN_CODE_GEN_BUFFER_SIZE (1024u * 1024)/* Maximum size of the code gen buffer we'd like to use. Unless otherwise indicated, this is constrained by the range of direct branches on the host cpu, as used by the TCG implementation of goto_tb. */ ...
988, attrs=...) at /usr/src/debug/qemu-2.7.0/memory.c:591#130x00005624dd3b0dacinmemory_region_dispatch_write (mr=<optimizedout>, addr=20, data=<optimizedout>, size=<optimizedout>, attrs=...) at /usr/src/debug/qemu-2.7.0/memory.c:1275#140x00007fb962c730a4incode_gen_buffer (...
code_gen_buffer ()#1 0x000000000053878e in cpu_tb_exec (cpu=0x2441050, itb=<optimized out>, tb_exit=0x7ffd5bae38e8) at ../../accel/tcg/cpu-exec.c:353#2 0x000000000053965e in cpu_loop_exec_tb (tb_exit=0x7ffd5bae38e8, last_tb=<synthetic pointer>, tb=0x7f09441caac0 <code_...
[ 0.000000] software IO TLB: SWIOTLB bounce buffer size roundup to 1MB [ 0.000000] software IO TLB: mapped [mem 0x000000004f657000-0x000000004f757000] (1MB) [ 0.000000] Memory: 229284K/262144K available (13888K kernel code, 2078K rwdata, 3348K rodata, 1792K init, 697K bss, 32860K ...
(env=0x7f2c2b0ba040, port=0x3cf, data=0x0) at /root/桌面/qemu-newest/target-i386/misc_helper.c:32 #15 0x00007f2c1e920169 in code_gen_buffer () #16 0x00007f2in cpu_tb_exec (cpu=0x7f2c2b0b1dc0, itb=0x7f2c1d5043d0) at /root/桌面/qemu-newest/cpu-exec.c:161 #17 0x...