| 1 | /* Assembler macros for m68k. |
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| 2 | Copyright (C) 1998-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sysdeps/generic/sysdep.h> |
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| 20 | |
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| 21 | #ifdef __ASSEMBLER__ |
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| 22 | |
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| 23 | /* Define an entry point visible from C. |
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| 24 | |
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| 25 | There is currently a bug in gdb which prevents us from specifying |
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| 26 | incomplete stabs information. Fake some entries here which specify |
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| 27 | the current source file. */ |
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| 28 | # define ENTRY(name) \ |
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| 29 | .globl C_SYMBOL_NAME(name); \ |
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| 30 | .type C_SYMBOL_NAME(name),@function; \ |
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| 31 | .p2align 2; \ |
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| 32 | C_LABEL(name) \ |
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| 33 | cfi_startproc; \ |
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| 34 | CALL_MCOUNT |
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| 35 | |
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| 36 | # undef END |
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| 37 | # define END(name) \ |
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| 38 | cfi_endproc; \ |
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| 39 | .size name,.-name |
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| 40 | |
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| 41 | |
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| 42 | /* If compiled for profiling, call `_mcount' at the start of each function. */ |
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| 43 | # ifdef PROF |
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| 44 | /* The mcount code relies on a normal frame pointer being on the stack |
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| 45 | to locate our caller, so push one just for its benefit. */ |
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| 46 | # define CALL_MCOUNT \ |
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| 47 | move.l %fp, -(%sp); \ |
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| 48 | cfi_adjust_cfa_offset (4); cfi_rel_offset (%a6, 0); \ |
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| 49 | move.l %sp, %fp; \ |
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| 50 | jbsr JUMPTARGET (_mcount); \ |
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| 51 | move.l (%sp)+, %fp; \ |
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| 52 | cfi_adjust_cfa_offset (-4); cfi_restore (%a6); |
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| 53 | # else |
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| 54 | # define CALL_MCOUNT /* Do nothing. */ |
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| 55 | # endif |
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| 56 | |
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| 57 | # define PSEUDO(name, syscall_name, args) \ |
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| 58 | .globl __syscall_error; \ |
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| 59 | ENTRY (name) \ |
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| 60 | DO_CALL (syscall_name, args); \ |
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| 61 | jcc JUMPTARGET(__syscall_error) |
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| 62 | |
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| 63 | # undef PSEUDO_END |
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| 64 | # define PSEUDO_END(name) \ |
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| 65 | END (name) |
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| 66 | |
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| 67 | # undef JUMPTARGET |
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| 68 | # ifdef PIC |
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| 69 | # define JUMPTARGET(name) name##@PLTPC |
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| 70 | # else |
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| 71 | # define JUMPTARGET(name) name |
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| 72 | # endif |
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| 73 | |
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| 74 | #endif /* __ASSEMBLER__ */ |
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| 75 | |
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