diff options
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/solaris2/kopensolaris-gnu/x86_64/syscall.S | 56 |
1 files changed, 35 insertions, 21 deletions
diff --git a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/x86_64/syscall.S b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/x86_64/syscall.S index 42cf4251b7..7ac6bbdd12 100644 --- a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/x86_64/syscall.S +++ b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/x86_64/syscall.S @@ -48,35 +48,49 @@ ENTRY (__syscall) movq 24(%rbp), %rcx pushq %rcx; cfi_adjust_cfa_offset(8) /* arg #7. */ -// movq 8(%rbp), %rcx -// pushq %rcx; subq $8, %rsp; cfi_adjust_cfa_offset(8) /* return addr (intentionally ignored by syscall). */ syscall - /* Restore the stack frame. */ + /* Restore the stack frame. */ leave; cfi_adjust_cfa_offset(-32) /* Watch out, we have 4 cfi_adjust_cfa_offset above! */ - jb SYSCALL_ERROR_LABEL; /* Jump to error handler if error. */ - -L(pseudo_end): - ret /* Return to caller. */ PSEUDO_END (__syscall) weak_alias (__syscall, syscall) + .text; +/* int __systemcall(sysret_t *, int, ...); */ ENTRY (__systemcall) - popl %rdx /* Pop return address into %edx. */ - popl %rcx /* Pop sysret_t into %rcx. */ - popl %eax /* Pop syscall number into %eax. */ - pushl %rdx /* Push return address onto stack. */ - syscall /* Do the system call. */ - pushl %rcx /* Restore sysret_t on stack. */ - movl 8(%rsp), %rdx /* Save return address into %rdx. */ - pushl %rdx /* Restore return address on stack. */ - jb 1f /* Jump to error handler if error. */ - movl %rax, 0(%rcx) /* Set sysret_t. */ - xorl %rax, %rax /* Set return to 0. */ -1: - ret -PSEUDO_END (__syscall) + pushq %rbp; cfi_adjust_cfa_offset(8) + movq %rsp, %rbp + pushq %rdi /* save sysret_t pointer. */ + movq %rsi, %rax /* syscall num. */ + movq %rdx, %rdi /* arg #1. */ + movq %rcx, %rsi /* arg #2. */ + movq %r8, %rdx /* arg #3. */ + movq %r9, %rcx /* save arg #4, it should be in %r10. */ + movq 16(%rbp), %r8 /* arg #5. */ + movq 24(%rbp), %r9 /* arg #6. */ + movq 40(%rbp), %r10 + pushq %r10; cfi_adjust_cfa_offset(8) /* arg #8, on stack. */ + movq 32(%rbp), %r10 + pushq %r10; cfi_adjust_cfa_offset(8) /* arg #7, on stack. */ + movq %rcx, %r10 /* arg #4. */ + subq $8, %rsp; cfi_adjust_cfa_offset(8) /* return addr (intentionally ignored by syscall). */ + + syscall + + movq 8(%rbp), %r10 /* sysret_t pointer. */ + + /* Restore the stack frame. */ + leave; cfi_adjust_cfa_offset(-32) /* Watch out, we have 4 cfi_adjust_cfa_offset above! */ + + jb SYSCALL_ERROR_LABEL; /* Jump to error handler if error. */ + + movq %rax, 0(%r10) /* no error, save result into sysret_t. */ + movq %rdx, 8(%r10) + xorq %rax, %rax + ret /* Return to caller. */ +PSEUDO_END (__systemcall) + |