2 * trampoline entry and return code for kretprobes.
5 #include <linux/linkage.h>
6 #include <asm/asm-offsets.h>
7 #include <asm/assembler.h>
11 .macro save_all_base_regs
12 stp x0, x1, [sp, #S_X0]
13 stp x2, x3, [sp, #S_X2]
14 stp x4, x5, [sp, #S_X4]
15 stp x6, x7, [sp, #S_X6]
16 stp x8, x9, [sp, #S_X8]
17 stp x10, x11, [sp, #S_X10]
18 stp x12, x13, [sp, #S_X12]
19 stp x14, x15, [sp, #S_X14]
20 stp x16, x17, [sp, #S_X16]
21 stp x18, x19, [sp, #S_X18]
22 stp x20, x21, [sp, #S_X20]
23 stp x22, x23, [sp, #S_X22]
24 stp x24, x25, [sp, #S_X24]
25 stp x26, x27, [sp, #S_X26]
26 stp x28, x29, [sp, #S_X28]
27 add x0, sp, #S_FRAME_SIZE
28 stp lr, x0, [sp, #S_LR]
30 * Construct a useful saved PSTATE
39 stp xzr, x0, [sp, #S_PC]
42 .macro restore_all_base_regs
43 ldr x0, [sp, #S_PSTATE]
44 and x0, x0, #(PSR_N_BIT | PSR_Z_BIT | PSR_C_BIT | PSR_V_BIT)
46 ldp x0, x1, [sp, #S_X0]
47 ldp x2, x3, [sp, #S_X2]
48 ldp x4, x5, [sp, #S_X4]
49 ldp x6, x7, [sp, #S_X6]
50 ldp x8, x9, [sp, #S_X8]
51 ldp x10, x11, [sp, #S_X10]
52 ldp x12, x13, [sp, #S_X12]
53 ldp x14, x15, [sp, #S_X14]
54 ldp x16, x17, [sp, #S_X16]
55 ldp x18, x19, [sp, #S_X18]
56 ldp x20, x21, [sp, #S_X20]
57 ldp x22, x23, [sp, #S_X22]
58 ldp x24, x25, [sp, #S_X24]
59 ldp x26, x27, [sp, #S_X26]
60 ldp x28, x29, [sp, #S_X28]
63 ENTRY(kretprobe_trampoline)
64 sub sp, sp, #S_FRAME_SIZE
69 bl trampoline_probe_handler
71 * Replace trampoline address in lr with actual orig_ret_addr return
78 add sp, sp, #S_FRAME_SIZE
81 ENDPROC(kretprobe_trampoline)