https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84150
Bug ID: 84150
Summary: Wrong pointer size used in builtin setjmp/longjmp with
-maddress-mode=long
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: igor.v.tsimbalist at intel dot com, ubizjak at gmail dot com
Target Milestone: ---
Target: x32
[hjl@gnu-6 gcc]$ cat /tmp/foo.c
void *buf[5];
void raise0(void)
{
__builtin_longjmp (buf, 1);
}
void execute(int cmd)
{
__builtin_setjmp (buf);
}
[hjl@gnu-6 gcc]$ gcc -S -O3 -mx32 /tmp/foo.c
[hjl@gnu-6 gcc]$ cat foo.s
.file "foo.c"
.text
.p2align 4,,15
.globl raise0
.type raise0, @function
raise0:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movl buf+4(%rip), %eax
movl %esp, %ebp
.cfi_def_cfa_register 6
movl buf(%rip), %ebp
movl buf+8(%rip), %esp
jmp *%rax
.cfi_endproc
.LFE0:
.size raise0, .-raise0
.p2align 4,,15
.globl execute
.type execute, @function
execute:
.LFB1:
.cfi_startproc
movl %esp, buf(%rip)
movl $.L5, buf+4(%rip)
movl %esp, buf+8(%rip)
ret
.L5:
.cfi_endproc
.LFE1:
.size execute, .-execute
.comm buf,20,16
[hjl@gnu-6 gcc]$ gcc -S -O3 -mx32 /tmp/foo.c -maddress-mode=long
[hjl@gnu-6 gcc]$ cat foo.s
.file "foo.c"
.text
.p2align 4,,15
.globl raise0
.type raise0, @function
raise0:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq buf+8(%rip), %rax
movq %rsp, %rbp
.cfi_def_cfa_register 6
movq buf(%rip), %rbp
movq buf+16(%rip), %rsp
jmp *%rax
.cfi_endproc
.LFE0:
.size raise0, .-raise0
.p2align 4,,15
.globl execute
.type execute, @function
execute:
.LFB1:
.cfi_startproc
movq %rsp, buf(%rip) <<<<<<<<<<< Pointer size should be 4 bytes.
movq $.L5, buf+8(%rip)
movq %rsp, buf+16(%rip)
ret
.L5:
.cfi_endproc
.LFE1:
.size execute, .-execute
.comm buf,20,16
