[444] | 1 | /* profile.h |
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| 2 | |
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| 3 | Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved. |
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| 4 | |
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| 5 | Permission to use, copy, modify, and distribute this software |
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| 6 | is freely granted, provided that this notice is preserved. */ |
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| 7 | |
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| 8 | #ifndef __XSCALE_PROFILE_H__ |
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| 9 | #define __XSCALE_PROFILE_H__ |
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| 10 | |
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| 11 | /* FIXME: |
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| 12 | We need to create a string version of the CPP predefined |
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| 13 | __USER_LABEL_PREFIX__ macro. Ideally we would like to |
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| 14 | so do something like: |
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| 15 | |
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| 16 | #if __USER_LABEL_PREFIX__ == _ |
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| 17 | |
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| 18 | but this fails for arm-elf targets because although |
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| 19 | __USER_LABEL__PREFIX__ is defined, it is not defined to |
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| 20 | a specific value (even 0) and so the above test fails |
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| 21 | with: |
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| 22 | |
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| 23 | operator '==' has no left operand |
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| 24 | |
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| 25 | Instead we have to test the CPP predefined __ELF__ and |
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| 26 | rely upon the *assumption* that ELF targets will not use |
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| 27 | an underscore prefix and that COFF targets will. */ |
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| 28 | |
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| 29 | #ifdef __ELF__ |
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| 30 | #define FOO "" |
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| 31 | #else |
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| 32 | #define FOO "_" |
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| 33 | #endif |
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| 34 | |
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| 35 | #define _MCOUNT_DECL(frompc, selfpc) \ |
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| 36 | void __attribute__ ((__no_instrument_function__)) \ |
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| 37 | mcount_internal (frompc, selfpc) |
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| 38 | |
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| 39 | /* mcount_internal expects two arguments |
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| 40 | r0 frompc (return address for function that call function that calls mcount) |
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| 41 | r1 selfpc (return address for function that called mcount) |
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| 42 | |
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| 43 | The frompc is extracted from the stack frames. If the code does not |
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| 44 | generate stack frames, then mcount cannot extract this |
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| 45 | information. Thus, the -fomit-frame-pointer optimization cannot be |
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| 46 | used if a call graph information is required. |
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| 47 | |
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| 48 | Due to optimizations mcount doesn't set up a new fp. mcount has the fp |
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| 49 | of the calling function. |
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| 50 | |
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| 51 | r0 frompc is from the current frame |
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| 52 | r1 selfpc can be obtained directly from lr. */ |
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| 53 | |
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| 54 | #ifdef __thumb__ |
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| 55 | #define MCOUNT \ |
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| 56 | void __attribute__ ((__naked__)) \ |
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| 57 | __attribute__ ((__no_instrument_function__)) \ |
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| 58 | mcount (void) \ |
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| 59 | { \ |
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| 60 | __asm__("push {r0, r1, r2, r3, lr};" \ |
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| 61 | "add r0, r7, #0;" \ |
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| 62 | "beq 1f;" \ |
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| 63 | "sub r0, r0, #4;" \ |
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| 64 | "ldr r0, [r0];" \ |
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| 65 | "1: mov r1, lr;" \ |
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| 66 | "bl " FOO "mcount_internal ;" \ |
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| 67 | "pop {r0, r1, r2, r3, pc};" \ |
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| 68 | ); \ |
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| 69 | } |
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| 70 | #else |
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| 71 | #define MCOUNT \ |
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| 72 | void __attribute__ ((__naked__)) \ |
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| 73 | __attribute__ ((__no_instrument_function__)) \ |
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| 74 | mcount (void) \ |
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| 75 | { \ |
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| 76 | __asm__("stmdb sp!, {r0, r1, r2, r3, lr};" \ |
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| 77 | "movs r0, fp;" \ |
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| 78 | "ldrne r0, [r0, #-4];" \ |
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| 79 | "mov r1, lr;" \ |
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| 80 | "bl " FOO "mcount_internal ;" \ |
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| 81 | "ldmia sp!, {r0, r1, r2, r3, pc};" \ |
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| 82 | ); \ |
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| 83 | } |
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| 84 | #endif |
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| 85 | |
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| 86 | #define FUNCTION_ALIGNMENT 2 |
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| 87 | |
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| 88 | #endif /* !__XSCALE_PROFILE_H__ */ |
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