1FUNCTION::REGISTER(3stap) Context Functions FUNCTION::REGISTER(3stap)
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6 function::register - Return the signed value of the named CPU register
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9 register:long(name:string)
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12 name
13 Name of the register to return
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16 Return the value of the named CPU register, as it was saved when the
17 current probe point was hit. If the register is 32 bits, it is
18 sign-extended to 64 bits.
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20 For the i386 architecture, the following names are recognized.
21 (name1/name2 indicates that name1 and name2 are alternative names for
22 the same register.) eax/ax, ebp/bp, ebx/bx, ecx/cx, edi/di, edx/dx,
23 eflags/flags, eip/ip, esi/si, esp/sp, orig_eax/orig_ax, xcs/cs, xds/ds,
24 xes/es, xfs/fs, xss/ss.
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26 For the x86_64 architecture, the following names are recognized: 64-bit
27 registers: r8, r9, r10, r11, r12, r13, r14, r15, rax/ax, rbp/bp,
28 rbx/bx, rcx/cx, rdi/di, rdx/dx, rip/ip, rsi/si, rsp/sp; 32-bit
29 registers: eax, ebp, ebx, ecx, edx, edi, edx, eip, esi, esp,
30 flags/eflags, orig_eax; segment registers: xcs/cs, xss/ss.
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32 For powerpc, the following names are recognized: r0, r1, ... r31, nip,
33 msr, orig_gpr3, ctr, link, xer, ccr, softe, trap, dar, dsisr, result.
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35 For s390x, the following names are recognized: r0, r1, ... r15, args,
36 psw.mask, psw.addr, orig_gpr2, ilc, trap.
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38 For AArch64, the following names are recognized: x0, x1, ... x30, fp,
39 lr, sp, pc, and orig_x0.
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42 tapset::registers(3stap)
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46SystemTap Tapset Reference June 2018 FUNCTION::REGISTER(3stap)