https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81654
Bug ID: 81654 Summary: Should interrupt attribute be allowed together with naked attribute? Product: gcc Version: 8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: hjl.tools at gmail dot com CC: ubizjak at gmail dot com Target Milestone: --- [hjl@gnu-6 naked-1]$ cat x.c /* { dg-do run { target i?86-*-* x86_64-*-* } } */ /* { dg-options "-mgeneral-regs-only" } */ extern void exit (int); typedef unsigned int uword_t __attribute__ ((mode (__word__))); #define ERROR 0x12345670 #define IP 0x12345671 #define CS 0x12345672 #define FLAGS 0x12345673 #define SP 0x12345674 #define SS 0x12345675 #define STRING(x) XSTRING(x) #define XSTRING(x) #x #define ASMNAME(cname) ASMNAME2 (__USER_LABEL_PREFIX__, cname) #define ASMNAME2(prefix, cname) XSTRING (prefix) cname struct interrupt_frame { uword_t ip; uword_t cs; uword_t flags; uword_t sp; uword_t ss; }; __attribute__((interrupt, naked, used)) void fn (struct interrupt_frame *frame, uword_t error) { if (ERROR != error) __builtin_abort (); if (IP != frame->ip) __builtin_abort (); if (CS != frame->cs) __builtin_abort (); if (FLAGS != frame->flags) __builtin_abort (); if (SP != frame->sp) __builtin_abort (); if (SS != frame->ss) __builtin_abort (); exit (0); } int main () { asm ("push $" STRING (SS) "; \ push $" STRING (SP) "; \ push $" STRING (FLAGS) "; \ push $" STRING (CS) "; \ push $" STRING (IP) "; \ push $" STRING (ERROR) "; \ jmp " ASMNAME ("fn")); return 0; } [hjl@gnu-6 naked-1]$ make /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc -B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -mgeneral-regs-only -c -o x.o x.c /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc -B/export/build/gnu/gcc/build-x86_64-linux/gcc/ x.o -o x ./x make: *** [Makefile:12: all] Segmentation fault [hjl@gnu-6 naked-1]$