| /* |
| * Generic syscall call. |
| * Upon entry |
| * %eax: system call number |
| * %ebx: arg0 to system call |
| * %ecx: arg.. |
| * %edx: arg.. |
| * %esi: arg.. |
| * %edi: arg.. |
| * We push these (to save them) load them up with the |
| * values from the calling frame (not all will actually be valid) |
| * and make the syscall. |
| */ |
| |
| #include <sys/linux-syscalls.h> |
| |
| .text |
| .type syscall, @function |
| .globl syscall |
| .align 4 |
| |
| syscall: |
| push %ebx |
| push %esi |
| push %edi |
| mov 16(%esp),%eax |
| mov 20(%esp),%ebx |
| mov 24(%esp),%ecx |
| mov 28(%esp),%edx |
| mov 32(%esp),%esi |
| mov 36(%esp),%edi |
| |
| int $0x80 |
| |
| cmpl $-4095, %eax |
| jb 1f |
| negl %eax |
| pushl %eax |
| call __set_errno |
| addl $4, %esp |
| orl $-1, %eax |
| 1: |
| pop %edi |
| pop %esi |
| pop %ebx |
| ret |
