2 * PowerPC linux replacement vdso.
4 * Copyright 2023 Linaro, Ltd.
6 * SPDX-License-Identifier: GPL-2.0-or-later
9 #include <asm/unistd.h>
10 #include <asm/errno.h>
15 #include "vdso-asmoffset.h"
23 /* For PPC64, functions have special linkage; we export pointers. */
25 .type \name, @function
34 .macro vdso_syscall name, nr
43 vdso_syscall __kernel_gettimeofday, __NR_gettimeofday
44 vdso_syscall __kernel_clock_gettime, __NR_clock_gettime
45 vdso_syscall __kernel_clock_getres, __NR_clock_getres
46 vdso_syscall __kernel_getcpu, __NR_getcpu
47 vdso_syscall __kernel_time, __NR_time
49 #ifdef __NR_clock_gettime64
50 vdso_syscall __kernel_clock_gettime64, __NR_clock_gettime64
53 __kernel_sync_dicache:
54 /* qemu does not need to flush caches */
56 endf __kernel_sync_dicache
61 * TODO: __kernel_get_tbfreq
62 * This is probably a constant for QEMU.
66 * Start the unwind info at least one instruction before the signal
67 * trampoline, because the unwinder will assume we are returning
75 # define __kernel_sigtramp_rt __kernel_sigtramp_rt64
78 # define __kernel_sigtramp_rt __kernel_sigtramp_rt32
82 #define sizeof_vreg 16
84 .cfi_def_cfa 1, SIGNAL_FRAMESIZE + offsetof_rt_sigframe_mcontext
88 .cfi_offset 67, 32 * sizeof_reg /* nip */
90 /* Integer registers */
91 .cfi_offset 0, 0 * sizeof_reg
92 .cfi_offset 1, 1 * sizeof_reg
93 .cfi_offset 2, 2 * sizeof_reg
94 .cfi_offset 3, 3 * sizeof_reg
95 .cfi_offset 4, 4 * sizeof_reg
96 .cfi_offset 5, 5 * sizeof_reg
97 .cfi_offset 6, 6 * sizeof_reg
98 .cfi_offset 7, 7 * sizeof_reg
99 .cfi_offset 8, 8 * sizeof_reg
100 .cfi_offset 9, 9 * sizeof_reg
101 .cfi_offset 10, 10 * sizeof_reg
102 .cfi_offset 11, 11 * sizeof_reg
103 .cfi_offset 12, 12 * sizeof_reg
104 .cfi_offset 13, 13 * sizeof_reg
105 .cfi_offset 14, 14 * sizeof_reg
106 .cfi_offset 15, 15 * sizeof_reg
107 .cfi_offset 16, 16 * sizeof_reg
108 .cfi_offset 17, 17 * sizeof_reg
109 .cfi_offset 18, 18 * sizeof_reg
110 .cfi_offset 19, 19 * sizeof_reg
111 .cfi_offset 20, 20 * sizeof_reg
112 .cfi_offset 21, 21 * sizeof_reg
113 .cfi_offset 22, 22 * sizeof_reg
114 .cfi_offset 23, 23 * sizeof_reg
115 .cfi_offset 24, 24 * sizeof_reg
116 .cfi_offset 25, 25 * sizeof_reg
117 .cfi_offset 26, 26 * sizeof_reg
118 .cfi_offset 27, 27 * sizeof_reg
119 .cfi_offset 28, 28 * sizeof_reg
120 .cfi_offset 29, 29 * sizeof_reg
121 .cfi_offset 30, 30 * sizeof_reg
122 .cfi_offset 31, 31 * sizeof_reg
123 .cfi_offset 65, 36 * sizeof_reg /* lr */
124 .cfi_offset 70, 38 * sizeof_reg /* ccr */
126 /* Floating point registers */
127 .cfi_offset 32, offsetof_mcontext_fregs
128 .cfi_offset 33, offsetof_mcontext_fregs + 1 * sizeof_freg
129 .cfi_offset 34, offsetof_mcontext_fregs + 2 * sizeof_freg
130 .cfi_offset 35, offsetof_mcontext_fregs + 3 * sizeof_freg
131 .cfi_offset 36, offsetof_mcontext_fregs + 4 * sizeof_freg
132 .cfi_offset 37, offsetof_mcontext_fregs + 5 * sizeof_freg
133 .cfi_offset 38, offsetof_mcontext_fregs + 6 * sizeof_freg
134 .cfi_offset 39, offsetof_mcontext_fregs + 7 * sizeof_freg
135 .cfi_offset 40, offsetof_mcontext_fregs + 8 * sizeof_freg
136 .cfi_offset 41, offsetof_mcontext_fregs + 9 * sizeof_freg
137 .cfi_offset 42, offsetof_mcontext_fregs + 10 * sizeof_freg
138 .cfi_offset 43, offsetof_mcontext_fregs + 11 * sizeof_freg
139 .cfi_offset 44, offsetof_mcontext_fregs + 12 * sizeof_freg
140 .cfi_offset 45, offsetof_mcontext_fregs + 13 * sizeof_freg
141 .cfi_offset 46, offsetof_mcontext_fregs + 14 * sizeof_freg
142 .cfi_offset 47, offsetof_mcontext_fregs + 15 * sizeof_freg
143 .cfi_offset 48, offsetof_mcontext_fregs + 16 * sizeof_freg
144 .cfi_offset 49, offsetof_mcontext_fregs + 17 * sizeof_freg
145 .cfi_offset 50, offsetof_mcontext_fregs + 18 * sizeof_freg
146 .cfi_offset 51, offsetof_mcontext_fregs + 19 * sizeof_freg
147 .cfi_offset 52, offsetof_mcontext_fregs + 20 * sizeof_freg
148 .cfi_offset 53, offsetof_mcontext_fregs + 21 * sizeof_freg
149 .cfi_offset 54, offsetof_mcontext_fregs + 22 * sizeof_freg
150 .cfi_offset 55, offsetof_mcontext_fregs + 23 * sizeof_freg
151 .cfi_offset 56, offsetof_mcontext_fregs + 24 * sizeof_freg
152 .cfi_offset 57, offsetof_mcontext_fregs + 25 * sizeof_freg
153 .cfi_offset 58, offsetof_mcontext_fregs + 26 * sizeof_freg
154 .cfi_offset 59, offsetof_mcontext_fregs + 27 * sizeof_freg
155 .cfi_offset 60, offsetof_mcontext_fregs + 28 * sizeof_freg
156 .cfi_offset 61, offsetof_mcontext_fregs + 29 * sizeof_freg
157 .cfi_offset 62, offsetof_mcontext_fregs + 30 * sizeof_freg
158 .cfi_offset 63, offsetof_mcontext_fregs + 31 * sizeof_freg
161 * Unlike the kernel, unconditionally represent the Altivec/VSX regs.
162 * The space within the stack frame is always available, and most of
163 * our supported processors have them enabled. The only complication
164 * for PPC64 is the misalignment, so that we have to use indirection.
166 .macro save_vreg_ofs reg, ofs
169 * vreg = *(cfa + offsetof(v_regs)) + ofs
171 * The CFA is input to the expression on the stack, so:
172 * DW_CFA_expression reg, length (7),
173 * DW_OP_plus_uconst (0x23), vreg_ptr, DW_OP_deref (0x06),
174 * DW_OP_plus_uconst (0x23), ofs
176 .cfi_escape 0x10, 77 + \reg, 7, 0x23, (offsetof_mcontext_vregs_ptr & 0x7f) + 0x80, offsetof_mcontext_vregs_ptr >> 7, 0x06, 0x23, (\ofs & 0x7f) | 0x80, \ofs >> 7
178 .cfi_offset 77 + \reg, offsetof_mcontext_vregs + \ofs
183 save_vreg_ofs \reg, (\reg * sizeof_vreg)
219 save_vreg_ofs 33, (32 * sizeof_vreg + 12)
223 __kernel_sigtramp_rt:
224 raw_syscall __NR_rt_sigreturn
225 endf __kernel_sigtramp_rt
229 * The non-rt sigreturn has the same layout at a different offset.
230 * Move the CFA and leave all the other descriptions the same.
232 .cfi_def_cfa 1, SIGNAL_FRAMESIZE + offsetof_sigframe_mcontext
235 raw_syscall __NR_sigreturn
236 endf __kernel_sigtramp32