124 lines
2.5 KiB
ArmAsm
124 lines
2.5 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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pushq %rbp
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movq %rsp, %rbp
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addq $1, %rax
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xorq %rax, %rax
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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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addq %r14,%rsp
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popq %rbx
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popq %r14
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popq %r13
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popq %r12
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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, x86_64 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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pushq %rbp
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movq %rsp,%rbp
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pushq %r12
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pushq %r13
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pushq %r14
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pushq %rbx
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movq %rdi,%r12
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movq %rsi,%rbx
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movq %rdx,%r11
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movq $0,%r14
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test %rbx,%rbx
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je fire
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movq (%r11),%rdi
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%rsi
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%rdx
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%rcx
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%r8
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%r9
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movq %rbx,%r13
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morestack:
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dec %rbx
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test %rbx,%rbx
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je args
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subq $16,%rsp
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addq $16,%r14
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dec %rbx
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test %rbx,%rbx
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je args
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jmp morestack
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args:
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movq %r13,%rbx
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movq $0,%r13
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moreargs:
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dec %rbx
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test %rbx,%rbx
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je fire
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addq $8,%r11
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movq (%r11),%rax
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movq %rax,(%rsp,%r13)
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addq $8,%r13
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jmp moreargs
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fire: jmp *%r12
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