1// SPDX-License-Identifier: GPL-2.0
 2#include <sys/ucontext.h>
 3#define __FRAME_OFFSETS
 4#include <asm/ptrace.h>
 5#include <sysdep/ptrace.h>
 6
 7void get_regs_from_mc(struct uml_pt_regs *regs, mcontext_t *mc)
 8{
 9#ifdef __i386__
10#define COPY2(X,Y) regs->gp[X] = mc->gregs[REG_##Y]
11#define COPY(X) regs->gp[X] = mc->gregs[REG_##X]
12#define COPY_SEG(X) regs->gp[X] = mc->gregs[REG_##X] & 0xffff;
13#define COPY_SEG_CPL3(X) regs->gp[X] = (mc->gregs[REG_##X] & 0xffff) | 3;
14	COPY_SEG(GS); COPY_SEG(FS); COPY_SEG(ES); COPY_SEG(DS);
15	COPY(EDI); COPY(ESI); COPY(EBP);
16	COPY2(UESP, ESP); /* sic */
17	COPY(EBX); COPY(EDX); COPY(ECX); COPY(EAX);
18	COPY(EIP); COPY_SEG_CPL3(CS); COPY(EFL); COPY_SEG_CPL3(SS);
19#else
20#define COPY2(X,Y) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##Y]
21#define COPY(X) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##X]
22	COPY(R8); COPY(R9); COPY(R10); COPY(R11);
23	COPY(R12); COPY(R13); COPY(R14); COPY(R15);
24	COPY(RDI); COPY(RSI); COPY(RBP); COPY(RBX);
25	COPY(RDX); COPY(RAX); COPY(RCX); COPY(RSP);
26	COPY(RIP);
27	COPY2(EFLAGS, EFL);
28	COPY2(CS, CSGSFS);
29	regs->gp[CS / sizeof(unsigned long)] &= 0xffff;
30	regs->gp[CS / sizeof(unsigned long)] |= 3;
31#endif
32}