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LoongArch defines hardware watchpoint functions for fetch operations. After the software configures the watchpoints for fetch, the processor hardware will monitor the access addresses of the fetch operations and trigger a watchpoint exception when the watchpoint setting conditions are met. Hardware watchpoints for fetch operations is used to implement hardware breakpoint function on LoongArch. Refer to the following document for hardware breakpoint. https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#control-and-status-registers-related-to-watchpoints A simple test is as follows: lihui@bogon:~$ cat test.c #include <stdio.h> int a = 0; int main() { printf("start test\n"); a = 1; printf("a = %d\n", a); printf("end test\n"); return 0; } lihui@bogon:~$ gcc -g test.c -o test without this patch: lihui@bogon:~$ gdb test ... (gdb) start ... Temporary breakpoint 1, main () at test.c:5 5 printf("start test\n"); (gdb) hbreak 8 No hardware breakpoint support in the target. with this patch: lihui@bogon:~$ gdb test ... (gdb) start ... Temporary breakpoint 1, main () at test.c:5 5 printf("start test\n"); (gdb) hbreak 8 Hardware assisted breakpoint 2 at 0x1200006ec: file test.c, line 8. (gdb) c Continuing. start test a = 1 Breakpoint 2, main () at test.c:8 8 printf("end test\n"); (gdb) c Continuing. end test [Inferior 1 (process 25378) exited normally] Signed-off-by: Hui Li <lihui@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> |
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| aarch64.h | ||
| alpha.h | ||
| amdgpu.h | ||
| arc-cpu.def | ||
| arc-reloc.def | ||
| arc.h | ||
| arm.h | ||
| avr.h | ||
| bfin.h | ||
| bpf.h | ||
| ChangeLog-0415 | ||
| ChangeLog-9103 | ||
| common.h | ||
| cr16.h | ||
| cris.h | ||
| crx.h | ||
| csky.h | ||
| d10v.h | ||
| d30v.h | ||
| dlx.h | ||
| dwarf.h | ||
| epiphany.h | ||
| external.h | ||
| fr30.h | ||
| frv.h | ||
| ft32.h | ||
| h8.h | ||
| hppa.h | ||
| i370.h | ||
| i386.h | ||
| i860.h | ||
| i960.h | ||
| ia64.h | ||
| internal.h | ||
| ip2k.h | ||
| iq2000.h | ||
| kvx_elfids.h | ||
| kvx.h | ||
| lm32.h | ||
| loongarch.h | ||
| m32c.h | ||
| m32r.h | ||
| m68hc11.h | ||
| m68k.h | ||
| mcore.h | ||
| mep.h | ||
| metag.h | ||
| microblaze.h | ||
| mips.h | ||
| mmix.h | ||
| mn10200.h | ||
| mn10300.h | ||
| moxie.h | ||
| msp430.h | ||
| mt.h | ||
| nds32.h | ||
| nfp.h | ||
| nios2.h | ||
| or1k.h | ||
| pj.h | ||
| ppc64.h | ||
| ppc.h | ||
| pru.h | ||
| reloc-macros.h | ||
| riscv.h | ||
| rl78.h | ||
| rx.h | ||
| s12z.h | ||
| s390.h | ||
| score.h | ||
| sh.h | ||
| sparc.h | ||
| spu.h | ||
| tic6x-attrs.h | ||
| tic6x.h | ||
| tilegx.h | ||
| tilepro.h | ||
| v850.h | ||
| vax.h | ||
| visium.h | ||
| vxworks.h | ||
| wasm32.h | ||
| x86-64.h | ||
| xgate.h | ||
| xstormy16.h | ||
| xtensa.h | ||
| z80.h | ||