minix/lib/nbsd_libc/arch/powerpc/sys/ptrace.S
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

61 lines
1.4 KiB
ArmAsm

/* $NetBSD: ptrace.S,v 1.6 2011/01/16 02:43:10 matt Exp $ */
#include "SYS.h"
#include "assym.h"
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: ptrace.S,v 1.6 2011/01/16 02:43:10 matt Exp $")
#endif /* LIBC_SCCS && !lint */
#define XCALLFRAMELEN ((((2+5)*SZREG) + CALLFRAMELEN - 1) & -CALLFRAMELEN)
#define XCALLFRAME_DATA (XCALLFRAMELEN - 1*SZREG)
#define XCALLFRAME_ADDR (XCALLFRAMELEN - 2*SZREG)
#define XCALLFRAME_PID (XCALLFRAMELEN - 3*SZREG)
#define XCALLFRAME_REQUEST (XCALLFRAMELEN - 4*SZREG)
#define XCALLFRAME_R30 (XCALLFRAMELEN - 5*SZREG)
ENTRY(ptrace)
#ifdef _REENTRANT
mflr %r0
stw %r0,CALLFRAME_LR(%r1)
stwu %r1,-XCALLFRAMELEN(%r1)
stw %r3,XCALLFRAME_REQUEST(%r1)
stw %r4,XCALLFRAME_PID(%r1)
stw %r5,XCALLFRAME_ADDR(%r1)
stw %r6,XCALLFRAME_DATA(%r1)
#ifdef PIC
stw %r30,XCALLFRAME_R30(%r1)
PIC_TOCSETUP(ptrace, %r30)
#endif
bl PIC_PLT(_C_LABEL(__errno))
li %r7,0
stw %r7,0(%r3)
#ifdef PIC
lwz %r30,XCALLFRAME_R30(%r1)
#endif
lwz %r6,XCALLFRAME_DATA(%r1)
lwz %r4,XCALLFRAME_PID(%r1)
lwz %r5,XCALLFRAME_ADDR(%r1)
lwz %r3,XCALLFRAME_REQUEST(%r1)
addi %r1,%r1,XCALLFRAMELEN
lwz %r0,CALLFRAME_LR(%r1)
mtlr %r0
#else
#ifdef PIC
mflr %r0
PIC_GOTSETUP(%r7)
lwz %r7,_C_LABEL(errno)@got(%r7)
li %r8,0
stw %r8,0(%r7)
mtlr 0
#else
lis %r7,_C_LABEL(errno)@ha
li %r8,0
stw %r8,_C_LABEL(errno)@l(%r7)
#endif /* PIC */
#endif /* _REENTRANT */
_DOSYSCALL(ptrace)
bnslr
b _C_LABEL(__cerror)