diff options
| -rw-r--r-- | bindings/linux/Makefile | 1 | ||||
| -rw-r--r-- | bindings/linux/setjmp.S | 58 | ||||
| -rw-r--r-- | bindings/linux/setjmp.h | 37 |
3 files changed, 62 insertions, 34 deletions
diff --git a/bindings/linux/Makefile b/bindings/linux/Makefile index cf0cc7a..e98aa3c 100644 --- a/bindings/linux/Makefile +++ b/bindings/linux/Makefile @@ -1,6 +1,7 @@ obj-m = upb.o upb-objs = \ + setjmp.o \ ../../upb/upb.o \ ../../upb/bytestream.o \ ../../upb/def.o \ diff --git a/bindings/linux/setjmp.S b/bindings/linux/setjmp.S new file mode 100644 index 0000000..8ef5831 --- /dev/null +++ b/bindings/linux/setjmp.S @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2003 Peter Wemm. + * Copyright (c) 1993 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +_setjmp: + movq %rbx,0(%rdi) /* save rbx */ + movq %rsp,8(%rdi) /* save rsp */ + movq %rbp,16(%rdi) /* save rbp */ + movq %r12,24(%rdi) /* save r12 */ + movq %r13,32(%rdi) /* save r13 */ + movq %r14,40(%rdi) /* save r14 */ + movq %r15,48(%rdi) /* save r15 */ + movq 0(%rsp),%rdx /* get rta */ + movq %rdx,56(%rdi) /* save rip */ + xorl %eax,%eax /* return(0); */ + ret + +_longjmp: + movq 0(%rdi),%rbx /* restore rbx */ + movq 8(%rdi),%rsp /* restore rsp */ + movq 16(%rdi),%rbp /* restore rbp */ + movq 24(%rdi),%r12 /* restore r12 */ + movq 32(%rdi),%r13 /* restore r13 */ + movq 40(%rdi),%r14 /* restore r14 */ + movq 48(%rdi),%r15 /* restore r15 */ + movq 56(%rdi),%rdx /* get rta */ + movq %rdx,0(%rsp) /* put in return frame */ + xorl %eax,%eax /* return(1); */ + incl %eax + ret diff --git a/bindings/linux/setjmp.h b/bindings/linux/setjmp.h index 6da4313..c4716e6 100644 --- a/bindings/linux/setjmp.h +++ b/bindings/linux/setjmp.h @@ -7,38 +7,7 @@ // Linux doesn't provide setjmp/longjmp, boo. -typedef void *jmp_buf[3]; // rsp, rbp, rip +typedef void *jmp_buf[8]; -static inline int _setjmp(jmp_buf env) { - register int ret asm ("%eax"); - __asm__ __volatile__ goto ( - " movq %%rsp, 0(%0)\n" // Save rsp - " movq %%rbp, 8(%0)\n" // Save rbp - " movq $1f, 16(%0)\n" // Save rip - " jmp %l[setup]\n" - "1:" - : // No outputs allowed (GCC limitation). - : "b" (env) // Input - : // All registers clobbered except rsp, which save in env. - "%rcx", "%rdx", "%rdi", "%rsi", "memory", "cc", - "%r8" , "%r9" , "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" - : setup // Target labels. - ); - return ret; - -setup: - return 0; -} - -__attribute__((__noreturn__)) -static inline void _longjmp(jmp_buf env, int val) { - __asm__ __volatile__ ( - " movq 0(%0), %%rsp\n" // Restore rsp - " movq 8(%0), %%rbp\n" // Restore rbp - " movq %0, %%rbx\n" // Restore rbx - " jmpq *16(%0)\n" // Jump to saved rip - : // No output. - : "r" (env), "a" (val) // Move val to %eax - ); - __builtin_unreachable(); -} +extern int _setjmp(jmp_buf env); +__attribute__((__noreturn__)) extern void _longjmp(jmp_buf env, int val); |