70 lines
1.4 KiB
ArmAsm
70 lines
1.4 KiB
ArmAsm
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/*
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* Copyright (c) 2012, Chris Andrews. All rights reserved.
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*/
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/*
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* Stub functions containing DTrace tracepoints for probes and
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* is-enabled probes. These functions are copied for each probe
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* dynamically created.
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*
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*/
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.text
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.align 4, 0x90
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.globl usdt_tracepoint_isenabled
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.globl _usdt_tracepoint_isenabled
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.globl usdt_tracepoint_probe
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.globl _usdt_tracepoint_probe
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.globl usdt_tracepoint_end
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.globl _usdt_tracepoint_end
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.globl usdt_probe_args
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.globl _usdt_probe_args
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usdt_tracepoint_isenabled:
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_usdt_tracepoint_isenabled:
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pushl %ebp
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movl %esp, %ebp
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subl $8, %esp
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xorl %eax, %eax
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nop
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nop
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leave
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ret
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usdt_tracepoint_probe:
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_usdt_tracepoint_probe:
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nop
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nop
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nop
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nop
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nop
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addl $0x20,%esp
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leave
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usdt_tracepoint_end:
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_usdt_tracepoint_end:
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ret
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/*
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* Probe argument marshalling, i386 style
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*
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*/
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usdt_probe_args:
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_usdt_probe_args:
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pushl %ebp
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movl %esp,%ebp
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subl $8,%esp
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subl $8,%esp
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movl 8(%ebp),%edx
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movl 0xc(%ebp),%ecx
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test %ecx,%ecx
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je fire
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args: movl %ecx,%eax
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sal $2,%eax
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subl $4,%eax
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addl 0x10(%ebp),%eax
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pushl (%eax)
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dec %ecx
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jne args
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fire: jmp *%edx
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