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35 * @(#)profile.h 8.1 (Berkeley) 6/11/93
39 #ifndef _MACHINE_PROFILE_H_
40 #define _MACHINE_PROFILE_H_
43 * Config generates something to tell the compiler to align functions on 32
44 * byte boundaries. A strict alignment is good for keeping the tables small.
46 #define FUNCTION_ALIGNMENT 16
48 #define _MCOUNT_DECL void mcount
50 typedef u_long fptrdiff_t;
53 * Cannot implement mcount in C as GCC will trash the ip register when it
54 * pushes a trapframe. Pity we cannot insert assembly before the function
64 __asm__(".align 2"); \
65 __asm__(".type __mcount ,%function"); \
66 __asm__(".global __mcount"); \
67 __asm__("__mcount:"); \
69 * Preserve registers that are trashed during mcount \
71 __asm__("stmfd sp!, {r0-r3, ip, lr}"); \
73 * find the return address for mcount, \
74 * and the return address for mcount's caller. \
76 * frompcindex = pc pushed by call into self. \
78 __asm__("mov r0, ip"); \
80 * selfpc = pc pushed by mcount call \
82 __asm__("mov r1, lr"); \
84 * Call the real mcount code \
86 __asm__("bl mcount"); \
88 * Restore registers that were trashed during mcount \
90 __asm__("ldmfd sp!, {r0-r3, lr}"); \
92 * Return to the caller. Loading lr and pc in one instruction \
93 * is deprecated on ARMv7 so we need this on its own. \
95 __asm__("ldmfd sp!, {pc}");
101 #define MCOUNT_FROMPC_USER(pc) \
102 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
104 #define MCOUNT_FROMPC_INTR(pc) \
105 ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \
106 ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \
107 (uintfptr_t)btrap) : ~0U)
111 #define MCOUNT_DECL(s) register_t s;
113 #include <machine/asm.h>
114 #include <machine/cpufunc.h>
115 #define MCOUNT_ENTER(s) {s = intr_disable(); } /* kill IRQ */
116 #define MCOUNT_EXIT(s) {intr_restore(s); } /* restore old value */
118 void mcount(uintfptr_t frompc, uintfptr_t selfpc);
121 typedef u_int uintfptr_t;
124 #endif /* !_MACHINE_PROFILE_H_ */