54 lines
1.6 KiB
ArmAsm
54 lines
1.6 KiB
ArmAsm
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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x64/calltrace.S
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Attempts to unwind the stack and prints the code locations where functions
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were called. This greatly aids debugging.
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*******************************************************************************/
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.global asm_calltrace
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.type asm_calltrace, @function
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asm_calltrace:
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push %rbp
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mov %rsp, %rbp
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push %rbx
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push %r12
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xor %r12, %r12
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mov %rbp, %rbx
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.Lasm_calltrace_unwind:
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test %rbx, %rbx
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jz .Lasm_calltrace_done
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mov 8(%rbx), %rsi # Previous RIP
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mov 0(%rbx), %rbx # Previous RBP
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test %rsi, %rsi
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jz .Lasm_calltrace_done
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mov %r12, %rdi
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call calltrace_print_function
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inc %r12
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jmp .Lasm_calltrace_unwind
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.Lasm_calltrace_done:
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pop %r12
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pop %rbx
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pop %rbp
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ret
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.size asm_calltrace, . - asm_calltrace
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