| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | |
| 2 | #include <errno.h> |
| 3 | #include <asm/ptrace.h> |
| 4 | #include <asm/unistd.h> |
| 5 | |
| 6 | int |
| 7 | ptrace(int request, int pid, int addr, int data) |
| 8 | { |
| 9 | int ret; |
| 10 | int res; |
| 11 | |
| 12 | if (request > 0 && request < 4) data = (int)&ret; |
| 13 | |
| 14 | __asm__ __volatile__ ("sub.l er0,er0\n\t" |
| 15 | "mov.b %1,r0l\n\t" |
| 16 | "mov.l %2,er1\n\t" |
| 17 | "mov.l %3,er2\n\t" |
| 18 | "mov.l %4,er3\n\t" |
| 19 | "mov.l %5,er4\n\t" |
| 20 | "trapa #0\n\t" |
| 21 | "mov.l er0,%0" |
| 22 | :"=g" (res) |
| 23 | :"i" (__NR_ptrace), "g" (request), "g" (pid), |
| 24 | "g" (addr), "g" (data) |
| 25 | : "er0", "er1", "er2", "er3", "er4"); |
| 26 | |
| 27 | if (res >= 0) { |
| 28 | if (request > 0 && request < 4) { |
| 29 | __set_errno(0); |
| 30 | return (ret); |
| 31 | } |
| 32 | return (int) res; |
| 33 | } |
| 34 | __set_errno(-res); |
| 35 | return -1; |
| 36 | } |