| Dmitry V. Levin | d70d1c4 | 2015-03-22 22:13:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * On i386, pt_regs and user_regs_struct are the same, |
| 3 | * but on 64 bit x86, user_regs_struct has six more fields: |
| 4 | * fs_base, gs_base, ds, es, fs, gs. |
| 5 | * PTRACE_GETREGS fills them too, so struct pt_regs would overflow. |
| 6 | */ |
| 7 | struct i386_user_regs_struct { |
| 8 | uint32_t ebx; |
| 9 | uint32_t ecx; |
| 10 | uint32_t edx; |
| 11 | uint32_t esi; |
| 12 | uint32_t edi; |
| 13 | uint32_t ebp; |
| 14 | uint32_t eax; |
| 15 | uint32_t xds; |
| 16 | uint32_t xes; |
| 17 | uint32_t xfs; |
| 18 | uint32_t xgs; |
| 19 | uint32_t orig_eax; |
| 20 | uint32_t eip; |
| 21 | uint32_t xcs; |
| 22 | uint32_t eflags; |
| 23 | uint32_t esp; |
| 24 | uint32_t xss; |
| 25 | }; |
| 26 | static union { |
| 27 | struct user_regs_struct x86_64_r; |
| 28 | struct i386_user_regs_struct i386_r; |
| 29 | } x86_regs_union; |
| 30 | #define x86_64_regs x86_regs_union.x86_64_r |
| 31 | #define i386_regs x86_regs_union.i386_r |
| 32 | |
| 33 | uint32_t *const i386_esp_ptr = &i386_regs.esp; |
| 34 | uint64_t *const x86_64_rsp_ptr = (uint64_t *) &x86_64_regs.rsp; |
| 35 | static struct iovec x86_io = { |
| 36 | .iov_base = &x86_regs_union |
| 37 | }; |
| 38 | |
| 39 | #define ARCH_REGS_FOR_GETREGSET x86_regs_union |
| 40 | #define ARCH_IOVEC_FOR_GETREGSET x86_io |