| 1 | /* syscall error handlers. C-SKY ABIV2 version. |
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| 2 | Copyright (C) 2018-2024 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 <sysdep.h> |
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| 20 | |
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| 21 | /* The syscall stubs jump here when they detect an error. |
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| 22 | The code for Linux is almost identical to the canonical Unix |
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| 23 | code, except that the error number in R0 is negated. */ |
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| 24 | |
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| 25 | #undef CALL_MCOUNT |
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| 26 | #define CALL_MCOUNT /* Don't insert the profiling call, it clobbers R0. */ |
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| 27 | |
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| 28 | .text |
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| 29 | ENTRY (__syscall_error) |
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| 30 | movi a1, 0 |
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| 31 | rsub a0, a0, a1 |
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| 32 | |
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| 33 | #if !IS_IN (rtld) |
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| 34 | mov a1, a0 |
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| 35 | mov a0, tls |
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| 36 | |
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| 37 | grs t1, .Lgetpc1 |
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| 38 | .Lgetpc1: |
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| 39 | lrw t0, errno@gottpoff |
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| 40 | add t1, t1, t0 |
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| 41 | ldw t1, (t1) |
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| 42 | add t1, a0 |
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| 43 | stw a1, (t1) |
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| 44 | bmaski a0, 0 |
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| 45 | rts |
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| 46 | #elif RTLD_PRIVATE_ERRNO /* !IS_IN (rtld) */ |
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| 47 | # ifdef __PIC__ |
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| 48 | grs t1, .Lgetpc2 |
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| 49 | .Lgetpc2: |
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| 50 | lrw t0, .Lgetpc2@GOTPC |
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| 51 | addu t1, t1, t0 |
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| 52 | lrw t0, rtld_errno@PLT |
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| 53 | ldr.w t0, (t1, t0 << 0) |
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| 54 | # else |
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| 55 | lrw t0, rtld_errno |
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| 56 | # endif /* __PIC__ */ |
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| 57 | stw a0, (t0) |
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| 58 | bmaski a0, 0 |
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| 59 | rts |
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| 60 | #else |
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| 61 | # error "Unsupported non-TLS case" |
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| 62 | #endif /* RTLD_PRIVATE_ERRNO */ |
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| 63 | |
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| 64 | #undef __syscall_error |
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| 65 | END (__syscall_error) |
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| 66 | |
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