Move change_syscall() to its only user and make it static
* defs.h: Remove declaration of change_syscall(). * process.c (change_syscall): Remove definition of this function. * util.c (change_syscall): Add definition of change_syscall(). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Denys Vlasenko
parent
2897fb3437
commit
081533c100
1
defs.h
1
defs.h
@ -524,7 +524,6 @@ extern int is_restart_error(struct tcb *);
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extern int pathtrace_select(const char *);
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extern int pathtrace_match(struct tcb *);
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extern int change_syscall(struct tcb *, int);
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extern int internal_fork(struct tcb *);
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extern int internal_exec(struct tcb *);
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126
process.c
126
process.c
@ -530,124 +530,6 @@ sys_unshare(struct tcb *tcp)
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return 0;
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}
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int
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sys_fork(struct tcb *tcp)
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{
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if (exiting(tcp))
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return RVAL_UDECIMAL;
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return 0;
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}
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int
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change_syscall(struct tcb *tcp, int new)
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{
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#if defined(I386)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
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return -1;
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return 0;
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#elif defined(X86_64)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
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return -1;
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return 0;
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#elif defined(POWERPC)
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if (ptrace(PTRACE_POKEUSER, tcp->pid,
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(char*)(sizeof(unsigned long)*PT_R0), new) < 0)
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return -1;
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return 0;
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#elif defined(S390) || defined(S390X)
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/* s390 linux after 2.4.7 has a hook in entry.S to allow this */
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
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return -1;
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return 0;
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#elif defined(M68K)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
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return -1;
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return 0;
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#elif defined(SPARC) || defined(SPARC64)
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struct pt_regs regs;
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if (ptrace(PTRACE_GETREGS, tcp->pid, (char*)®s, 0) < 0)
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return -1;
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regs.u_regs[U_REG_G1] = new;
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if (ptrace(PTRACE_SETREGS, tcp->pid, (char*)®s, 0) < 0)
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return -1;
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return 0;
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#elif defined(MIPS)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
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return -1;
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return 0;
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#elif defined(ALPHA)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
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return -1;
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return 0;
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#elif defined(AVR32)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R8), new) < 0)
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return -1;
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return 0;
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#elif defined(BFIN)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_P0), new) < 0)
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return -1;
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return 0;
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#elif defined(IA64)
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if (ia32) {
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switch (new) {
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case 2:
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break; /* x86 SYS_fork */
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case SYS_clone:
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new = 120;
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break;
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default:
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fprintf(stderr, "%s: unexpected syscall %d\n",
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__FUNCTION__, new);
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return -1;
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}
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
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return -1;
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} else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
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return -1;
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return 0;
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#elif defined(HPPA)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
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return -1;
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return 0;
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#elif defined(SH)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
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return -1;
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return 0;
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#elif defined(SH64)
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/* Top half of reg encodes the no. of args n as 0x1n.
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Assume 0 args as kernel never actually checks... */
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
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0x100000 | new) < 0)
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return -1;
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return 0;
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#elif defined(CRISV10) || defined(CRISV32)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
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return -1;
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return 0;
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#elif defined(ARM)
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/* Some kernels support this, some (pre-2.6.16 or so) don't. */
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# ifndef PTRACE_SET_SYSCALL
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# define PTRACE_SET_SYSCALL 23
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# endif
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if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
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return -1;
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return 0;
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#elif defined(TILE)
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if (ptrace(PTRACE_POKEUSER, tcp->pid,
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(char*)PTREGS_OFFSET_REG(0),
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new) != 0)
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return -1;
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return 0;
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#elif defined(MICROBLAZE)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR(0)), new) < 0)
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return -1;
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return 0;
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#else
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#warning Do not know how to handle change_syscall for this architecture
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#endif /* architecture */
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return -1;
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}
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int
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internal_fork(struct tcb *tcp)
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{
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@ -676,6 +558,14 @@ internal_fork(struct tcb *tcp)
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return 0;
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}
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int
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sys_fork(struct tcb *tcp)
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{
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if (exiting(tcp))
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return RVAL_UDECIMAL;
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return 0;
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}
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int
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sys_vfork(struct tcb *tcp)
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{
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110
util.c
110
util.c
@ -1169,6 +1169,116 @@ printcall(struct tcb *tcp)
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# define CLONE_STOPPED 0x02000000
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#endif
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static int
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change_syscall(struct tcb *tcp, int new)
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{
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#if defined(I386)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
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return -1;
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return 0;
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#elif defined(X86_64)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
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return -1;
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return 0;
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#elif defined(POWERPC)
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if (ptrace(PTRACE_POKEUSER, tcp->pid,
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(char*)(sizeof(unsigned long)*PT_R0), new) < 0)
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return -1;
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return 0;
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#elif defined(S390) || defined(S390X)
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/* s390 linux after 2.4.7 has a hook in entry.S to allow this */
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
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return -1;
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return 0;
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#elif defined(M68K)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
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return -1;
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return 0;
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#elif defined(SPARC) || defined(SPARC64)
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struct pt_regs regs;
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if (ptrace(PTRACE_GETREGS, tcp->pid, (char*)®s, 0) < 0)
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return -1;
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regs.u_regs[U_REG_G1] = new;
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if (ptrace(PTRACE_SETREGS, tcp->pid, (char*)®s, 0) < 0)
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return -1;
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return 0;
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#elif defined(MIPS)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
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return -1;
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return 0;
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#elif defined(ALPHA)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
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return -1;
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return 0;
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#elif defined(AVR32)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R8), new) < 0)
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return -1;
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return 0;
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#elif defined(BFIN)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_P0), new) < 0)
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return -1;
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return 0;
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#elif defined(IA64)
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if (ia32) {
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switch (new) {
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case 2:
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break; /* x86 SYS_fork */
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case SYS_clone:
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new = 120;
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break;
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default:
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fprintf(stderr, "%s: unexpected syscall %d\n",
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__FUNCTION__, new);
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return -1;
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}
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
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return -1;
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} else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
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return -1;
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return 0;
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#elif defined(HPPA)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
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return -1;
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return 0;
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#elif defined(SH)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
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return -1;
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return 0;
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#elif defined(SH64)
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/* Top half of reg encodes the no. of args n as 0x1n.
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Assume 0 args as kernel never actually checks... */
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
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0x100000 | new) < 0)
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return -1;
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return 0;
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#elif defined(CRISV10) || defined(CRISV32)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
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return -1;
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return 0;
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#elif defined(ARM)
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/* Some kernels support this, some (pre-2.6.16 or so) don't. */
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# ifndef PTRACE_SET_SYSCALL
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# define PTRACE_SET_SYSCALL 23
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# endif
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if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
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return -1;
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return 0;
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#elif defined(TILE)
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if (ptrace(PTRACE_POKEUSER, tcp->pid,
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(char*)PTREGS_OFFSET_REG(0),
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new) != 0)
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return -1;
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return 0;
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#elif defined(MICROBLAZE)
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if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR(0)), new) < 0)
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return -1;
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return 0;
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#else
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#warning Do not know how to handle change_syscall for this architecture
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#endif /* architecture */
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return -1;
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}
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#ifdef IA64
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typedef unsigned long *arg_setup_state;
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