diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 7bf146e8be..5275ebaf57 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -159,6 +159,11 @@ __i686.get_pc_thunk.reg: \ # endif /* _LIBC_REENTRANT */ #endif /* PIC */ + +/* The original calling convention for system calls on Linux/i386 is + to use int $0x80. */ +#define ENTER_KERNEL int $0x80 + /* Linux takes system call arguments in registers: syscall number %eax call-clobbered @@ -208,7 +213,7 @@ __i686.get_pc_thunk.reg: \ PUSHARGS_##args \ DOARGS_##args \ movl $SYS_ify (syscall_name), %eax; \ - int $0x80 \ + ENTER_KERNEL \ POPARGS_##args #define PUSHARGS_0 /* No arguments to push. */ @@ -255,6 +260,10 @@ __i686.get_pc_thunk.reg: \ #else /* !__ASSEMBLER__ */ +/* The original calling convention for system calls on Linux/i386 is + to use int $0x80. */ +#define ENTER_KERNEL "int $0x80" + /* We need some help from the assembler to generate optimal code. We define some macros here which later will be used. */ asm (".L__X'%ebx = 1\n\t" @@ -315,7 +324,7 @@ asm (".L__X'%ebx = 1\n\t" asm volatile ( \ LOADARGS_##nr \ "movl %1, %%eax\n\t" \ - "int $0x80\n\t" \ + ENTER_KERNEL "\n\t" \ RESTOREARGS_##nr \ : "=a" (resultvar) \ : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \ |