diff options
Diffstat (limited to 'src/internal/i386/syscall.s')
| -rw-r--r-- | src/internal/i386/syscall.s | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/src/internal/i386/syscall.s b/src/internal/i386/syscall.s deleted file mode 100644 index 0ebf2218..00000000 --- a/src/internal/i386/syscall.s +++ /dev/null @@ -1,78 +0,0 @@ -.hidden __sysinfo - -# The calling convention for __vsyscall has the syscall number -# and 5 args arriving as: eax, edx, ecx, edi, esi, 4(%esp). -# This ensures that the inline asm in the C code never has to touch -# ebx or ebp (which are unavailable in PIC and frame-pointer-using -# code, respectively), and optimizes for size/simplicity in the caller. - -.global __vsyscall -.hidden __vsyscall -.type __vsyscall,@function -__vsyscall: - push %edi - push %ebx - mov %edx,%ebx - mov %edi,%edx - mov 12(%esp),%edi - push %eax - call 1f -2: mov %ebx,%edx - pop %ebx - pop %ebx - pop %edi - ret - -1: mov (%esp),%eax - add $[__sysinfo-2b],%eax - mov (%eax),%eax - test %eax,%eax - jz 1f - push %eax - mov 8(%esp),%eax - ret # tail call to kernel vsyscall entry -1: mov 4(%esp),%eax - int $128 - ret - -# The __vsyscall6 entry point is used only for 6-argument syscalls. -# Instead of passing the 5th argument on the stack, a pointer to the -# 5th and 6th arguments is passed. This is ugly, but there are no -# register constraints the inline asm could use that would make it -# possible to pass two arguments on the stack. - -.global __vsyscall6 -.hidden __vsyscall6 -.type __vsyscall6,@function -__vsyscall6: - push %ebp - push %eax - mov 12(%esp), %ebp - mov (%ebp), %eax - mov 4(%ebp), %ebp - push %eax - mov 4(%esp),%eax - call __vsyscall - pop %ebp - pop %ebp - pop %ebp - ret - -.global __syscall -.hidden __syscall -.type __syscall,@function -__syscall: - lea 24(%esp),%eax - push %esi - push %edi - push %eax - mov 16(%esp),%eax - mov 20(%esp),%edx - mov 24(%esp),%ecx - mov 28(%esp),%edi - mov 32(%esp),%esi - call __vsyscall6 - pop %edi - pop %edi - pop %esi - ret |