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Linux/arch/sparc/lib/mcount.S

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Diff markup

Differences between /arch/sparc/lib/mcount.S (Architecture sparc) and /arch/alpha/lib/mcount.S (Architecture alpha)


  1 /* SPDX-License-Identifier: GPL-2.0 */            
  2 /*                                                
  3  * Copyright (C) 2000 Anton Blanchard (anton@l    
  4  *                                                
  5  * This file implements mcount(), which is use    
  6  * This can also be tweaked for kernel stack o    
  7  */                                               
  8                                                   
  9 #include <linux/export.h>                         
 10 #include <linux/linkage.h>                        
 11                                                   
 12 /*                                                
 13  * This is the main variant and is called by C    
 14  * automatically instruments every C function     
 15  */                                               
 16                                                   
 17         .text                                     
 18         .align          32                        
 19         .globl          _mcount                   
 20         .type           _mcount,#function         
 21         EXPORT_SYMBOL(_mcount)                    
 22         .globl          mcount                    
 23         .type           mcount,#function          
 24 _mcount:                                          
 25 mcount:                                           
 26 #ifdef CONFIG_FUNCTION_TRACER                     
 27 #ifdef CONFIG_DYNAMIC_FTRACE                      
 28         /* Do nothing, the retl/nop below is a    
 29 #else                                             
 30         sethi           %hi(ftrace_trace_funct    
 31         sethi           %hi(ftrace_stub), %g2     
 32         ldx             [%g1 + %lo(ftrace_trac    
 33         or              %g2, %lo(ftrace_stub),    
 34         cmp             %g1, %g2                  
 35         be,pn           %icc, 1f                  
 36          mov            %i7, %g3                  
 37         save            %sp, -176, %sp            
 38         mov             %g3, %o1                  
 39         jmpl            %g1, %o7                  
 40          mov            %i7, %o0                  
 41         ret                                       
 42          restore                                  
 43         /* not reached */                         
 44 1:                                                
 45 #ifdef CONFIG_FUNCTION_GRAPH_TRACER               
 46         sethi           %hi(ftrace_graph_retur    
 47         ldx             [%g1 + %lo(ftrace_grap    
 48         cmp             %g2, %g3                  
 49         bne,pn          %xcc, 5f                  
 50          sethi          %hi(ftrace_graph_entry    
 51         sethi           %hi(ftrace_graph_entry    
 52         or              %g2, %lo(ftrace_graph_    
 53         ldx             [%g1 + %lo(ftrace_grap    
 54         cmp             %g1, %g2                  
 55         be,pt           %xcc, 2f                  
 56          nop                                      
 57 5:      mov             %i7, %g2                  
 58         mov             %fp, %g3                  
 59         save            %sp, -176, %sp            
 60         mov             %g2, %l0                  
 61         ba,pt           %xcc, ftrace_graph_cal    
 62          mov            %g3, %l1                  
 63 #endif                                            
 64 2:                                                
 65 #endif                                            
 66 #endif                                            
 67         retl                                      
 68          nop                                      
 69         .size           _mcount,.-_mcount         
 70         .size           mcount,.-mcount           
 71                                                   
 72 #ifdef CONFIG_FUNCTION_TRACER                     
 73         .globl          ftrace_stub               
 74         .type           ftrace_stub,#function     
 75 ftrace_stub:                                      
 76         retl                                      
 77          nop                                      
 78         .size           ftrace_stub,.-ftrace_s    
 79 #ifdef CONFIG_DYNAMIC_FTRACE                      
 80         .globl          ftrace_caller             
 81         .type           ftrace_caller,#functio    
 82 ftrace_caller:                                    
 83         mov             %i7, %g2                  
 84         mov             %fp, %g3                  
 85         save            %sp, -176, %sp            
 86         mov             %g2, %o1                  
 87         mov             %g2, %l0                  
 88         mov             %g3, %l1                  
 89         .globl          ftrace_call               
 90 ftrace_call:                                      
 91         call            ftrace_stub               
 92          mov            %i7, %o0                  
 93 #ifdef CONFIG_FUNCTION_GRAPH_TRACER               
 94         .globl          ftrace_graph_call         
 95 ftrace_graph_call:                                
 96         call            ftrace_stub               
 97          nop                                      
 98 #endif                                            
 99         ret                                       
100          restore                                  
101 #ifdef CONFIG_FUNCTION_GRAPH_TRACER               
102         .size           ftrace_graph_call,.-ft    
103 #endif                                            
104         .size           ftrace_call,.-ftrace_c    
105         .size           ftrace_caller,.-ftrace    
106 #endif                                            
107 #endif                                            
108                                                   
109 #ifdef CONFIG_FUNCTION_GRAPH_TRACER               
110 ENTRY(ftrace_graph_caller)                        
111         mov             %l0, %o0                  
112         mov             %i7, %o1                  
113         call            prepare_ftrace_return     
114          mov            %l1, %o2                  
115         ret                                       
116          restore        %o0, -8, %i7              
117 END(ftrace_graph_caller)                          
118                                                   
119 ENTRY(return_to_handler)                          
120         save            %sp, -176, %sp            
121         call            ftrace_return_to_handl    
122          mov            %fp, %o0                  
123         jmpl            %o0 + 8, %g0              
124          restore                                  
125 END(return_to_handler)                            
126 #endif                                            
                                                      

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