| 1 | /* Copyright (C) 1992-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library. If not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <sysdep.h> |
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| 19 | #include <errno.h> |
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| 20 | #include <sys/asm.h> |
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| 21 | |
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| 22 | .set nomips16 |
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| 23 | |
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| 24 | #ifdef _LIBC_REENTRANT |
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| 25 | |
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| 26 | LOCALSZ= 3 |
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| 27 | FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK |
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| 28 | RAOFF= FRAMESZ-(1*SZREG) |
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| 29 | GPOFF= FRAMESZ-(2*SZREG) |
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| 30 | V0OFF= FRAMESZ-(3*SZREG) |
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| 31 | |
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| 32 | ENTRY(__syscall_error) |
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| 33 | #ifdef __PIC__ |
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| 34 | .set noat |
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| 35 | SETUP_GPX (AT) |
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| 36 | .set at |
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| 37 | #endif |
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| 38 | PTR_SUBU sp, FRAMESZ |
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| 39 | .set noat |
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| 40 | SETUP_GPX64(GPOFF,AT) |
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| 41 | .set at |
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| 42 | #ifdef __PIC__ |
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| 43 | SAVE_GP(GPOFF) |
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| 44 | #endif |
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| 45 | REG_S v0, V0OFF(sp) |
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| 46 | REG_S ra, RAOFF(sp) |
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| 47 | |
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| 48 | #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN |
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| 49 | /* We translate the system's EWOULDBLOCK error into EAGAIN. |
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| 50 | The GNU C library always defines EWOULDBLOCK==EAGAIN. |
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| 51 | EWOULDBLOCK_sys is the original number. */ |
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| 52 | bne v0, EWOULDBLOCK_sys, L(skip) |
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| 53 | nop |
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| 54 | li v0, EAGAIN |
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| 55 | L(skip): |
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| 56 | #endif |
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| 57 | /* Find our per-thread errno address */ |
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| 58 | jal __errno_location |
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| 59 | |
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| 60 | /* Store the error value. */ |
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| 61 | REG_L t0, V0OFF(sp) |
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| 62 | sw t0, 0(v0) |
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| 63 | |
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| 64 | /* And just kick back a -1. */ |
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| 65 | REG_L ra, RAOFF(sp) |
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| 66 | RESTORE_GP64 |
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| 67 | PTR_ADDU sp, FRAMESZ |
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| 68 | li v0, -1 |
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| 69 | j ra |
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| 70 | END(__syscall_error) |
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| 71 | |
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| 72 | #else /* _LIBC_REENTRANT */ |
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| 73 | |
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| 74 | |
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| 75 | ENTRY(__syscall_error) |
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| 76 | #ifdef __PIC__ |
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| 77 | SETUP_GPX (AT) |
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| 78 | #endif |
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| 79 | SETUP_GPX64 (t9, AT) |
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| 80 | |
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| 81 | #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN |
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| 82 | /* We translate the system's EWOULDBLOCK error into EAGAIN. |
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| 83 | The GNU C library always defines EWOULDBLOCK==EAGAIN. |
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| 84 | EWOULDBLOCK_sys is the original number. */ |
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| 85 | bne v0, EWOULDBLOCK_sys, L(skip) |
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| 86 | li v0, EAGAIN |
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| 87 | L(skip): |
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| 88 | #endif |
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| 89 | /* Store it in errno... */ |
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| 90 | sw v0, errno |
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| 91 | |
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| 92 | /* And just kick back a -1. */ |
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| 93 | li v0, -1 |
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| 94 | |
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| 95 | RESTORE_GP64 |
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| 96 | j ra |
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| 97 | END(__syscall_error) |
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| 98 | #endif /* _LIBC_REENTRANT */ |
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| 99 | |
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