1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _PPC64_PPC32_H
3 #define _PPC64_PPC32_H
4
5 #include <linux/compat.h>
6 #include <asm/siginfo.h>
7 #include <asm/signal.h>
8
9 /*
10 * Data types and macros for providing 32b PowerPC support.
11 */
12
13 /* These are here to support 32-bit syscalls on a 64-bit kernel. */
14
15 struct pt_regs32 {
16 unsigned int gpr[32];
17 unsigned int nip;
18 unsigned int msr;
19 unsigned int orig_gpr3; /* Used for restarting system calls */
20 unsigned int ctr;
21 unsigned int link;
22 unsigned int xer;
23 unsigned int ccr;
24 unsigned int mq; /* 601 only (not used at present) */
25 unsigned int trap; /* Reason for being here */
26 unsigned int dar; /* Fault registers */
27 unsigned int dsisr;
28 unsigned int result; /* Result of a system call */
29 };
30
31 struct sigcontext32 {
32 unsigned int _unused[4];
33 int signal;
34 compat_uptr_t handler;
35 unsigned int oldmask;
36 compat_uptr_t regs; /* 4 byte pointer to the pt_regs32 structure. */
37 };
38
39 struct mcontext32 {
40 elf_gregset_t32 mc_gregs;
41 elf_fpregset_t mc_fregs;
42 unsigned int mc_pad[2];
43 elf_vrregset_t32 mc_vregs __attribute__((__aligned__(16)));
44 elf_vsrreghalf_t32 mc_vsregs __attribute__((__aligned__(16)));
45 };
46
47 struct ucontext32 {
48 unsigned int uc_flags;
49 unsigned int uc_link;
50 compat_stack_t uc_stack;
51 int uc_pad[7];
52 compat_uptr_t uc_regs; /* points to uc_mcontext field */
53 compat_sigset_t uc_sigmask; /* mask last for extensibility */
54 /* glibc has 1024-bit signal masks, ours are 64-bit */
55 int uc_maskext[30];
56 int uc_pad2[3];
57 struct mcontext32 uc_mcontext;
58 };
59
60 #endif /* _PPC64_PPC32_H */