diff options
author | Dmitry V. Levin <ldv@altlinux.org> | 2015-03-22 22:13:55 +0000 |
---|---|---|
committer | Dmitry V. Levin <ldv@altlinux.org> | 2015-03-23 22:24:59 +0000 |
commit | d70d1c4aa6b9b2f4713d79f442dbf66a3f702c9b (patch) | |
tree | d8d318c5bb99c1e731951dd7035b427d11dd7eec /syscall.c | |
parent | 1b7860776791fdd0fb429661c9cec434213eb81e (diff) | |
download | strace-d70d1c4aa6b9b2f4713d79f442dbf66a3f702c9b.tar.gz |
syscall.c: split arch specific code into separate arch files
Split code that use arch-specific registers to separate arch files.
* syscall.c: Move definitions of variables containing fetched registers
to linux/*/arch_regs.c files.
[HAVE_GETRVAL2] (getrval2): Move arch-specific code
to linux/*/arch_getrval2.c, include "arch_getrval2.c".
(print_pc): Move arch-specific code to linux/*/print_pc.c files,
include "print_pc.c".
[X86_64] (x86_64_getregs_old): Rename to getregs_old, move to
linux/x86_64/getregs_old.c, include "getregs_old.c".
[POWERPC] (powerpc_getregs_old): Rename to getregs_old, move to
linux/powerpc/getregs_old.c, include "getregs_old.c".
(get_regs) [X86_64, POWERPC]: Update callers.
(get_scno): Move arch-specific code to linux/*/get_scno.c,
include "get_scno.c".
(get_syscall_args): Move arch-specific code
to linux/*/get_syscall_args.c, include "get_syscall_args.c".
(get_error): Move arch-specific code to linux/*/get_error.c,
include "get_error.c".
(get_syscall_result): Move arch-specific code
to linux/*/get_syscall_result.c, include "get_syscall_result.c".
* Makefile.am (EXTRA_DIST): Add new linux/*/*.c files.
Diffstat (limited to 'syscall.c')
-rw-r--r-- | syscall.c | 1167 |
1 files changed, 13 insertions, 1154 deletions
@@ -1127,166 +1127,10 @@ is_negated_errno(kernel_ulong_t val) return val >= max; } - -#if defined(I386) -static struct user_regs_struct i386_regs; -long *const i386_esp_ptr = &i386_regs.esp; -# define ARCH_REGS_FOR_GETREGS i386_regs -#elif defined(X86_64) || defined(X32) -/* - * On i386, pt_regs and user_regs_struct are the same, - * but on 64 bit x86, user_regs_struct has six more fields: - * fs_base, gs_base, ds, es, fs, gs. - * PTRACE_GETREGS fills them too, so struct pt_regs would overflow. - */ -struct i386_user_regs_struct { - uint32_t ebx; - uint32_t ecx; - uint32_t edx; - uint32_t esi; - uint32_t edi; - uint32_t ebp; - uint32_t eax; - uint32_t xds; - uint32_t xes; - uint32_t xfs; - uint32_t xgs; - uint32_t orig_eax; - uint32_t eip; - uint32_t xcs; - uint32_t eflags; - uint32_t esp; - uint32_t xss; -}; -static union { - struct user_regs_struct x86_64_r; - struct i386_user_regs_struct i386_r; -} x86_regs_union; -# define x86_64_regs x86_regs_union.x86_64_r -# define i386_regs x86_regs_union.i386_r -uint32_t *const i386_esp_ptr = &i386_regs.esp; -uint64_t *const x86_64_rsp_ptr = (uint64_t *) &x86_64_regs.rsp; -static struct iovec x86_io = { - .iov_base = &x86_regs_union -}; -# define ARCH_REGS_FOR_GETREGSET x86_regs_union -# define ARCH_IOVEC_FOR_GETREGSET x86_io -#elif defined(IA64) -static struct pt_all_user_regs ia64_regs; -unsigned long *const ia64_frame_ptr = &ia64_regs.gr[12]; -# define IA64_PSR_IS ((long)1 << 34) -# define ia64_ia32mode (ia64_regs.cr_ipsr & IA64_PSR_IS) -# define ARCH_REGS_FOR_GETREGS ia64_regs -#elif defined(POWERPC) -struct pt_regs ppc_regs; /* not static */ -# define ARCH_REGS_FOR_GETREGS ppc_regs -#elif defined(M68K) -static long m68k_d0; -#elif defined(BFIN) -static long bfin_r0; -#elif defined(ARM) -static struct pt_regs arm_regs; -long *const arm_sp_ptr = &arm_regs.ARM_sp; -# define ARCH_REGS_FOR_GETREGS arm_regs -#elif defined(AARCH64) -struct arm_pt_regs { - int uregs[18]; -}; -# define ARM_cpsr uregs[16] -# define ARM_pc uregs[15] -# define ARM_lr uregs[14] -# define ARM_sp uregs[13] -# define ARM_ip uregs[12] -# define ARM_fp uregs[11] -# define ARM_r10 uregs[10] -# define ARM_r9 uregs[9] -# define ARM_r8 uregs[8] -# define ARM_r7 uregs[7] -# define ARM_r6 uregs[6] -# define ARM_r5 uregs[5] -# define ARM_r4 uregs[4] -# define ARM_r3 uregs[3] -# define ARM_r2 uregs[2] -# define ARM_r1 uregs[1] -# define ARM_r0 uregs[0] -# define ARM_ORIG_r0 uregs[17] -static union { - struct user_pt_regs aarch64_r; - struct arm_pt_regs arm_r; -} arm_regs_union; -# define aarch64_regs arm_regs_union.aarch64_r -# define arm_regs arm_regs_union.arm_r -uint64_t *const aarch64_sp_ptr = (uint64_t *) &aarch64_regs.sp; -uint32_t *const arm_sp_ptr = (uint32_t *) &arm_regs.ARM_sp; -static struct iovec aarch64_io = { - .iov_base = &arm_regs_union -}; -# define ARCH_REGS_FOR_GETREGSET arm_regs_union -# define ARCH_IOVEC_FOR_GETREGSET aarch64_io -#elif defined(ALPHA) -static long alpha_r0; -static long alpha_a3; -#elif defined(AVR32) -static struct pt_regs avr32_regs; -# define ARCH_REGS_FOR_GETREGS avr32_regs -#elif defined(SPARC) || defined(SPARC64) -struct pt_regs sparc_regs; /* not static */ -# define ARCH_REGS_FOR_GETREGS sparc_regs -#elif defined(MIPS) -struct mips_regs mips_regs; /* not static */ -/* PTRACE_GETREGS on MIPS is available since linux v2.6.15. */ -# define ARCH_REGS_FOR_GETREGS mips_regs -#elif defined(S390) || defined(S390X) -/* PTRACE_GETREGSET on S390 is available since linux v2.6.27. */ -static struct user_regs_struct s390_regset; -unsigned long *const s390_frame_ptr = &s390_regset.gprs[15]; -# define ARCH_REGS_FOR_GETREGSET s390_regset -#elif defined(HPPA) -static long hppa_r28; -#elif defined(SH) -static long sh_r0; -#elif defined(SH64) -static long sh64_r9; -#elif defined(CRISV10) || defined(CRISV32) -static long cris_r10; -#elif defined(TILE) -struct pt_regs tile_regs; /* not static */ -# define ARCH_REGS_FOR_GETREGS tile_regs -#elif defined(MICROBLAZE) -static long microblaze_r3; -#elif defined(OR1K) -static struct user_regs_struct or1k_regs; -# define ARCH_REGS_FOR_GETREGSET or1k_regs -#elif defined(METAG) -static struct user_gp_regs metag_regs; -# define ARCH_REGS_FOR_GETREGSET metag_regs -#elif defined(XTENSA) -static long xtensa_a2; -# elif defined(ARC) -static struct user_regs_struct arc_regs; -# define ARCH_REGS_FOR_GETREGSET arc_regs -#endif +#include "arch_regs.c" #ifdef HAVE_GETRVAL2 -long -getrval2(struct tcb *tcp) -{ - long val; - -# if defined(SPARC) || defined(SPARC64) - val = sparc_regs.u_regs[U_REG_O1]; -# elif defined(SH) - if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0) - return -1; -# elif defined ALPHA - if (upeek(tcp->pid, 20, &val) < 0) - return -1; -# elif defined(IA64) - val = ia64_regs.gr[9]; -# endif - - return val; -} +# include "arch_getrval2.c" #endif void @@ -1317,189 +1161,11 @@ print_pc(struct tcb *tcp) return; } -#if defined(I386) - tprintf(fmt, i386_regs.eip); -#elif defined(X86_64) || defined(X32) - if (x86_io.iov_len == sizeof(i386_regs)) - tprintf(fmt, (unsigned long) i386_regs.eip); - else - tprintf(fmt, (unsigned long) x86_64_regs.rip); -#elif defined(S390) || defined(S390X) - tprintf(fmt, s390_regset.psw.addr); -#elif defined(IA64) - tprintf(fmt, ia64_regs.br[0]); -#elif defined(POWERPC) - tprintf(fmt, ppc_regs.nip); -#elif defined(M68K) - long pc; - if (upeek(tcp->pid, 4*PT_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(ALPHA) - long pc; - if (upeek(tcp->pid, REG_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(SPARC) - tprintf(fmt, sparc_regs.pc); -#elif defined(SPARC64) - tprintf(fmt, sparc_regs.tpc); -#elif defined(HPPA) - long pc; - if (upeek(tcp->pid, PT_IAOQ0, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined MIPS - tprintf(fmt, (unsigned long) mips_REG_EPC); -#elif defined(SH) - long pc; - if (upeek(tcp->pid, 4*REG_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(SH64) - long pc; - if (upeek(tcp->pid, REG_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(AARCH64) - if (aarch64_io.iov_len == sizeof(arm_regs)) - tprintf(fmt, (unsigned long) arm_regs.ARM_pc); - else - tprintf(fmt, (unsigned long) aarch64_regs.pc); -#elif defined(ARM) - tprintf(fmt, arm_regs.ARM_pc); -#elif defined(AVR32) - tprintf(fmt, avr32_regs.pc); -#elif defined(BFIN) - long pc; - if (upeek(tcp->pid, PT_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(CRISV10) - long pc; - if (upeek(tcp->pid, 4*PT_IRP, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(CRISV32) - long pc; - if (upeek(tcp->pid, 4*PT_ERP, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(TILE) - tprintf(fmt, (unsigned long) tile_regs.pc); -#elif defined(OR1K) - tprintf(fmt, or1k_regs.pc); -#elif defined(METAG) - tprintf(fmt, metag_regs.pc); -#elif defined(XTENSA) - long pc; - if (upeek(tcp->pid, REG_PC, &pc) < 0) { - PRINTBADPC; - return; - } - tprintf(fmt, pc); -#elif defined(ARC) - tprintf(fmt, arc_regs.efa); -#else -# warning print_pc is not implemented for this architecture - PRINTBADPC; -#endif /* architecture */ -} - -#ifdef X86_64 -/* - * PTRACE_GETREGSET was added to the kernel in v2.6.25, - * a PTRACE_GETREGS based fallback is provided for old kernels. - */ -static void -x86_64_getregs_old(pid_t pid) -{ - /* Use old method, with unreliable heuristical detection of 32-bitness. */ - get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &x86_64_regs); - if (get_regs_error) - return; - - if (x86_64_regs.cs == 0x23) { - x86_io.iov_len = sizeof(i386_regs); - /* - * The order is important: i386_regs and x86_64_regs - * are overlaid in memory! - */ - i386_regs.ebx = x86_64_regs.rbx; - i386_regs.ecx = x86_64_regs.rcx; - i386_regs.edx = x86_64_regs.rdx; - i386_regs.esi = x86_64_regs.rsi; - i386_regs.edi = x86_64_regs.rdi; - i386_regs.ebp = x86_64_regs.rbp; - i386_regs.eax = x86_64_regs.rax; - /* i386_regs.xds = x86_64_regs.ds; unused by strace */ - /* i386_regs.xes = x86_64_regs.es; ditto... */ - /* i386_regs.xfs = x86_64_regs.fs; */ - /* i386_regs.xgs = x86_64_regs.gs; */ - i386_regs.orig_eax = x86_64_regs.orig_rax; - i386_regs.eip = x86_64_regs.rip; - /* i386_regs.xcs = x86_64_regs.cs; */ - /* i386_regs.eflags = x86_64_regs.eflags; */ - i386_regs.esp = x86_64_regs.rsp; - /* i386_regs.xss = x86_64_regs.ss; */ - } else { - x86_io.iov_len = sizeof(x86_64_regs); - } +#include "print_pc.c" } -#endif /* X86_64 */ -#ifdef POWERPC -/* - * PTRACE_GETREGS was added to the PowerPC kernel in v2.6.23, - * we provide a slow fallback for old kernels. - */ -static int -powerpc_getregs_old(pid_t pid) -{ - int i; - long r; - - if (iflag) { - r = upeek(pid, sizeof(long) * PT_NIP, (long *)&ppc_regs.nip); - if (r) - goto out; - } -#ifdef POWERPC64 /* else we never use it */ - r = upeek(pid, sizeof(long) * PT_MSR, (long *)&ppc_regs.msr); - if (r) - goto out; -#endif - r = upeek(pid, sizeof(long) * PT_CCR, (long *)&ppc_regs.ccr); - if (r) - goto out; - r = upeek(pid, sizeof(long) * PT_ORIG_R3, (long *)&ppc_regs.orig_gpr3); - if (r) - goto out; - for (i = 0; i <= 8; i++) { - r = upeek(pid, sizeof(long) * (PT_R0 + i), - (long *)&ppc_regs.gpr[i]); - if (r) - goto out; - } - out: - return r; -} +#if defined X86_64 || defined POWERPC +# include "getregs_old.c" #endif #if defined ARCH_REGS_FOR_GETREGSET @@ -1543,7 +1209,7 @@ get_regs(pid_t pid) return; getregset_support = -1; } - x86_64_getregs_old(pid); + getregs_old(pid); # else /* !X86_64 */ /* Assume that PTRACE_GETREGSET works. */ get_regs_error = get_regset(pid); @@ -1560,7 +1226,7 @@ get_regs(pid_t pid) if (get_regs_error && errno == EIO) { old_kernel = 1; old: - get_regs_error = powerpc_getregs_old(pid); + get_regs_error = getregs_old(pid); } # else /* Assume that PTRACE_GETREGS works. */ @@ -1587,337 +1253,7 @@ get_scno(struct tcb *tcp) long scno = 0; -#if defined(S390) || defined(S390X) - scno = s390_regset.gprs[2]; -#elif defined(POWERPC) - scno = ppc_regs.gpr[0]; -# ifdef POWERPC64 - unsigned int currpers; - - /* - * Check for 64/32 bit mode. - * Embedded implementations covered by Book E extension of PPC use - * bit 0 (CM) of 32-bit Machine state register (MSR). - * Other implementations use bit 0 (SF) of 64-bit MSR. - */ - currpers = (ppc_regs.msr & 0x8000000080000000) ? 0 : 1; - update_personality(tcp, currpers); -# endif -#elif defined(AVR32) - scno = avr32_regs.r8; -#elif defined(BFIN) - if (upeek(tcp->pid, PT_ORIG_P0, &scno)) - return -1; -#elif defined(I386) - scno = i386_regs.orig_eax; -#elif defined(X86_64) || defined(X32) -# ifndef __X32_SYSCALL_BIT -# define __X32_SYSCALL_BIT 0x40000000 -# endif - unsigned int currpers; -# if 1 - /* GETREGSET of NT_PRSTATUS tells us regset size, - * which unambiguously detects i386. - * - * Linux kernel distinguishes x86-64 and x32 processes - * solely by looking at __X32_SYSCALL_BIT: - * arch/x86/include/asm/compat.h::is_x32_task(): - * if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) - * return true; - */ - if (x86_io.iov_len == sizeof(i386_regs)) { - scno = i386_regs.orig_eax; - currpers = 1; - } else { - scno = x86_64_regs.orig_rax; - currpers = 0; - if (scno & __X32_SYSCALL_BIT) { - /* - * Syscall number -1 requires special treatment: - * it might be a side effect of SECCOMP_RET_ERRNO - * filtering that sets orig_rax to -1 - * in some versions of linux kernel. - * If that is the case, then - * __X32_SYSCALL_BIT logic does not apply. - */ - if ((long long) x86_64_regs.orig_rax != -1) { - scno -= __X32_SYSCALL_BIT; - currpers = 2; - } else { -# ifdef X32 - currpers = 2; -# endif - } - } - } -# elif 0 - /* cs = 0x33 for long mode (native 64 bit and x32) - * cs = 0x23 for compatibility mode (32 bit) - * ds = 0x2b for x32 mode (x86-64 in 32 bit) - */ - scno = x86_64_regs.orig_rax; - switch (x86_64_regs.cs) { - case 0x23: currpers = 1; break; - case 0x33: - if (x86_64_regs.ds == 0x2b) { - currpers = 2; - scno &= ~__X32_SYSCALL_BIT; - } else - currpers = 0; - break; - default: - fprintf(stderr, "Unknown value CS=0x%08X while " - "detecting personality of process " - "PID=%d\n", (int)x86_64_regs.cs, tcp->pid); - currpers = current_personality; - break; - } -# elif 0 - /* This version analyzes the opcode of a syscall instruction. - * (int 0x80 on i386 vs. syscall on x86-64) - * It works, but is too complicated, and strictly speaking, unreliable. - */ - unsigned long call, rip = x86_64_regs.rip; - /* sizeof(syscall) == sizeof(int 0x80) == 2 */ - rip -= 2; - errno = 0; - call = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)rip, (char *)0); - if (errno) - fprintf(stderr, "ptrace_peektext failed: %s\n", - strerror(errno)); - switch (call & 0xffff) { - /* x86-64: syscall = 0x0f 0x05 */ - case 0x050f: currpers = 0; break; - /* i386: int 0x80 = 0xcd 0x80 */ - case 0x80cd: currpers = 1; break; - default: - currpers = current_personality; - fprintf(stderr, - "Unknown syscall opcode (0x%04X) while " - "detecting personality of process " - "PID=%d\n", (int)call, tcp->pid); - break; - } -# endif - -# ifdef X32 - /* If we are built for a x32 system, then personality 0 is x32 - * (not x86_64), and stracing of x86_64 apps is not supported. - * Stracing of i386 apps is still supported. - */ - if (currpers == 0) { - fprintf(stderr, "syscall_%lu(...) in unsupported " - "64-bit mode of process PID=%d\n", - scno, tcp->pid); - return 0; - } - currpers &= ~2; /* map 2,1 to 0,1 */ -# endif - update_personality(tcp, currpers); -#elif defined(IA64) - if (ia64_ia32mode) { - scno = ia64_regs.gr[0]; - } else { - scno = ia64_regs.gr[15]; - } -#elif defined(AARCH64) - switch (aarch64_io.iov_len) { - case sizeof(aarch64_regs): - /* We are in 64-bit mode */ - scno = aarch64_regs.regs[8]; - update_personality(tcp, 1); - break; - case sizeof(arm_regs): - /* We are in 32-bit mode */ - /* Note: we don't support OABI, unlike 32-bit ARM build */ - scno = arm_regs.ARM_r7; - scno = shuffle_scno(scno); - update_personality(tcp, 0); - break; - } -#elif defined(ARM) - if (arm_regs.ARM_ip != 0) { - /* It is not a syscall entry */ - fprintf(stderr, "pid %d stray syscall exit\n", tcp->pid); - tcp->flags |= TCB_INSYSCALL; - return 0; - } - /* Note: we support only 32-bit CPUs, not 26-bit */ - -# if !defined(__ARM_EABI__) || ENABLE_ARM_OABI - if (arm_regs.ARM_cpsr & 0x20) - /* Thumb mode */ - goto scno_in_r7; - /* ARM mode */ - /* Check EABI/OABI by examining SVC insn's low 24 bits */ - errno = 0; - scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (void *)(arm_regs.ARM_pc - 4), NULL); - if (errno) - return -1; - /* EABI syscall convention? */ - if ((unsigned long) scno != 0xef000000) { - /* No, it's OABI */ - if ((scno & 0x0ff00000) != 0x0f900000) { - fprintf(stderr, "pid %d unknown syscall trap 0x%08lx\n", - tcp->pid, scno); - return -1; - } - /* Fixup the syscall number */ - scno &= 0x000fffff; - } else { - scno_in_r7: - scno = arm_regs.ARM_r7; - } -# else /* __ARM_EABI__ || !ENABLE_ARM_OABI */ - scno = arm_regs.ARM_r7; -# endif - scno = shuffle_scno(scno); -#elif defined(M68K) - if (upeek(tcp->pid, 4*PT_ORIG_D0, &scno) < 0) - return -1; -#elif defined(MIPS) - scno = mips_REG_V0; - - if (!SCNO_IN_RANGE(scno)) { - if (mips_REG_A3 == 0 || mips_REG_A3 == (uint64_t) -1) { - if (debug_flag) - fprintf(stderr, "stray syscall exit: v0 = %ld\n", scno); - return 0; - } - } -#elif defined(ALPHA) - if (upeek(tcp->pid, REG_A3, &alpha_a3) < 0) - return -1; - if (upeek(tcp->pid, REG_R0, &scno) < 0) - return -1; - - /* - * Do some sanity checks to figure out if it's - * really a syscall entry - */ - if (!SCNO_IN_RANGE(scno)) { - if (alpha_a3 == 0 || alpha_a3 == -1) { - if (debug_flag) - fprintf(stderr, "stray syscall exit: r0 = %ld\n", scno); - return 0; - } - } -#elif defined(SPARC) || defined(SPARC64) - /* Disassemble the syscall trap. */ - /* Retrieve the syscall trap instruction. */ - unsigned long trap; - errno = 0; -# if defined(SPARC64) - trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)sparc_regs.tpc, 0); - trap >>= 32; -# else - trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)sparc_regs.pc, 0); -# endif - if (errno) - return -1; - - /* Disassemble the trap to see what personality to use. */ - switch (trap) { - case 0x91d02010: - /* Linux/SPARC syscall trap. */ - update_personality(tcp, 0); - break; - case 0x91d0206d: - /* Linux/SPARC64 syscall trap. */ - update_personality(tcp, 2); - break; - case 0x91d02000: - /* SunOS syscall trap. (pers 1) */ - fprintf(stderr, "syscall: SunOS no support\n"); - return -1; - case 0x91d02008: - /* Solaris 2.x syscall trap. (per 2) */ - update_personality(tcp, 1); - break; - case 0x91d02009: - /* NetBSD/FreeBSD syscall trap. */ - fprintf(stderr, "syscall: NetBSD/FreeBSD not supported\n"); - return -1; - case 0x91d02027: - /* Solaris 2.x gettimeofday */ - update_personality(tcp, 1); - break; - default: -# if defined(SPARC64) - fprintf(stderr, "syscall: unknown syscall trap %08lx %016lx\n", trap, sparc_regs.tpc); -# else - fprintf(stderr, "syscall: unknown syscall trap %08lx %08lx\n", trap, sparc_regs.pc); -# endif - return -1; - } - - /* Extract the system call number from the registers. */ - if (trap == 0x91d02027) - scno = 156; - else - scno = sparc_regs.u_regs[U_REG_G1]; - if (scno == 0) { - scno = sparc_regs.u_regs[U_REG_O0]; - memmove(&sparc_regs.u_regs[U_REG_O0], &sparc_regs.u_regs[U_REG_O1], 7*sizeof(sparc_regs.u_regs[0])); - } -#elif defined(HPPA) - if (upeek(tcp->pid, PT_GR20, &scno) < 0) - return -1; -#elif defined(SH) - /* - * In the new syscall ABI, the system call number is in R3. - */ - if (upeek(tcp->pid, 4*(REG_REG0+3), &scno) < 0) - return -1; - - if (scno < 0) { - /* Odd as it may seem, a glibc bug has been known to cause - glibc to issue bogus negative syscall numbers. So for - our purposes, make strace print what it *should* have been */ - long correct_scno = (scno & 0xff); - if (debug_flag) - fprintf(stderr, - "Detected glibc bug: bogus system call" - " number = %ld, correcting to %ld\n", - scno, - correct_scno); - scno = correct_scno; - } -#elif defined(SH64) - if (upeek(tcp->pid, REG_SYSCALL, &scno) < 0) - return -1; - scno &= 0xFFFF; -#elif defined(CRISV10) || defined(CRISV32) - if (upeek(tcp->pid, 4*PT_R9, &scno) < 0) - return -1; -#elif defined(TILE) - unsigned int currpers; - scno = tile_regs.regs[10]; -# ifdef __tilepro__ - currpers = 1; -# else -# ifndef PT_FLAGS_COMPAT -# define PT_FLAGS_COMPAT 0x10000 /* from Linux 3.8 on */ -# endif - if (tile_regs.flags & PT_FLAGS_COMPAT) - currpers = 1; - else - currpers = 0; -# endif - update_personality(tcp, currpers); -#elif defined(MICROBLAZE) - if (upeek(tcp->pid, 0, &scno) < 0) - return -1; -#elif defined(OR1K) - scno = or1k_regs.gpr[11]; -#elif defined(METAG) - scno = metag_regs.dx[0][1]; /* syscall number in D1Re0 (D1.0) */ -#elif defined(XTENSA) - if (upeek(tcp->pid, SYSCALL_NR, &scno) < 0) - return -1; -# elif defined(ARC) - scno = arc_regs.scratch.r8; -#endif +#include "get_scno.c" tcp->scno = scno; if (SCNO_IS_VALID(tcp->scno)) { @@ -1940,463 +1276,17 @@ get_scno(struct tcb *tcp) static int get_syscall_args(struct tcb *tcp) { - int i, nargs; - - nargs = tcp->s_ent->nargs; - -#if defined(S390) || defined(S390X) - (void)i; - (void)nargs; - tcp->u_arg[0] = s390_regset.orig_gpr2; - tcp->u_arg[1] = s390_regset.gprs[3]; - tcp->u_arg[2] = s390_regset.gprs[4]; - tcp->u_arg[3] = s390_regset.gprs[5]; - tcp->u_arg[4] = s390_regset.gprs[6]; - tcp->u_arg[5] = s390_regset.gprs[7]; -#elif defined(ALPHA) - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, REG_A0+i, &tcp->u_arg[i]) < 0) - return -1; -#elif defined(IA64) - if (!ia64_ia32mode) { - unsigned long *rbs_end = - (unsigned long *) ia64_regs.ar[PT_AUR_BSP]; - unsigned long sof = (ia64_regs.cfm >> 0) & 0x7f; - unsigned long sol = (ia64_regs.cfm >> 7) & 0x7f; - unsigned long *out0 = ia64_rse_skip_regs(rbs_end, -sof + sol); - - for (i = 0; i < nargs; ++i) { - if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i), - sizeof(long), &tcp->u_arg[i]) < 0) - return -1; - } - } else { - (void)i; - (void)nargs; - /* truncate away IVE sign-extension */ - tcp->u_arg[0] = 0xffffffff & ia64_regs.gr[11]; /* EBX */ - tcp->u_arg[1] = 0xffffffff & ia64_regs.gr[ 9]; /* ECX */ - tcp->u_arg[2] = 0xffffffff & ia64_regs.gr[10]; /* EDX */ - tcp->u_arg[3] = 0xffffffff & ia64_regs.gr[14]; /* ESI */ - tcp->u_arg[4] = 0xffffffff & ia64_regs.gr[15]; /* EDI */ - tcp->u_arg[5] = 0xffffffff & ia64_regs.gr[13]; /* EBP */ - } -#elif defined LINUX_MIPSN64 - (void)i; - (void)nargs; - tcp->u_arg[0] = mips_REG_A0; - tcp->u_arg[1] = mips_REG_A1; - tcp->u_arg[2] = mips_REG_A2; - tcp->u_arg[3] = mips_REG_A3; - tcp->u_arg[4] = mips_REG_A4; - tcp->u_arg[5] = mips_REG_A5; -#elif defined LINUX_MIPSN32 - (void)i; - (void)nargs; - tcp->u_arg[0] = tcp->ext_arg[0] = mips_REG_A0; - tcp->u_arg[1] = tcp->ext_arg[1] = mips_REG_A1; - tcp->u_arg[2] = tcp->ext_arg[2] = mips_REG_A2; - tcp->u_arg[3] = tcp->ext_arg[3] = mips_REG_A3; - tcp->u_arg[4] = tcp->ext_arg[4] = mips_REG_A4; - tcp->u_arg[5] = tcp->ext_arg[5] = mips_REG_A5; -#elif defined LINUX_MIPSO32 - (void)i; - (void)nargs; - tcp->u_arg[0] = mips_REG_A0; - tcp->u_arg[1] = mips_REG_A1; - tcp->u_arg[2] = mips_REG_A2; - tcp->u_arg[3] = mips_REG_A3; - if (nargs > 4) { - umoven(tcp, mips_REG_SP + 4 * 4, - (nargs - 4) * sizeof(tcp->u_arg[0]), - &tcp->u_arg[4]); - } -#elif defined(POWERPC) - (void)i; - (void)nargs; - tcp->u_arg[0] = ppc_regs.orig_gpr3; - tcp->u_arg[1] = ppc_regs.gpr[4]; - tcp->u_arg[2] = ppc_regs.gpr[5]; - tcp->u_arg[3] = ppc_regs.gpr[6]; - tcp->u_arg[4] = ppc_regs.gpr[7]; - tcp->u_arg[5] = ppc_regs.gpr[8]; -#elif defined(SPARC) || defined(SPARC64) - for (i = 0; i < nargs; ++i) - tcp->u_arg[i] = sparc_regs.u_regs[U_REG_O0 + i]; -#elif defined(HPPA) - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0) - return -1; -#elif defined(ARM) || defined(AARCH64) -# if defined(AARCH64) - if (tcp->currpers == 1) - for (i = 0; i < nargs; ++i) - tcp->u_arg[i] = aarch64_regs.regs[i]; - else -# endif - for (i = 0; i < nargs; ++i) - tcp->u_arg[i] = arm_regs.uregs[i]; -#elif defined(AVR32) - (void)i; - (void)nargs; - tcp->u_arg[0] = avr32_regs.r12; - tcp->u_arg[1] = avr32_regs.r11; - tcp->u_arg[2] = avr32_regs.r10; - tcp->u_arg[3] = avr32_regs.r9; - tcp->u_arg[4] = avr32_regs.r5; - tcp->u_arg[5] = avr32_regs.r3; -#elif defined(BFIN) - static const int argreg[MAX_ARGS] = { PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5 }; - - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, argreg[i], &tcp->u_arg[i]) < 0) - return -1; -#elif defined(SH) - static const int syscall_regs[MAX_ARGS] = { - 4 * (REG_REG0+4), 4 * (REG_REG0+5), 4 * (REG_REG0+6), - 4 * (REG_REG0+7), 4 * (REG_REG0 ), 4 * (REG_REG0+1) - }; - - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, syscall_regs[i], &tcp->u_arg[i]) < 0) - return -1; -#elif defined(SH64) - int i; - /* Registers used by SH5 Linux system calls for parameters */ - static const int syscall_regs[MAX_ARGS] = { 2, 3, 4, 5, 6, 7 }; - - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0) - return -1; -#elif defined(I386) - (void)i; - (void)nargs; - tcp->u_arg[0] = i386_regs.ebx; - tcp->u_arg[1] = i386_regs.ecx; - tcp->u_arg[2] = i386_regs.edx; - tcp->u_arg[3] = i386_regs.esi; - tcp->u_arg[4] = i386_regs.edi; - tcp->u_arg[5] = i386_regs.ebp; -#elif defined(X86_64) || defined(X32) - (void)i; - (void)nargs; - if (x86_io.iov_len != sizeof(i386_regs)) { - /* x86-64 or x32 ABI */ - tcp->u_arg[0] = x86_64_regs.rdi; - tcp->u_arg[1] = x86_64_regs.rsi; - tcp->u_arg[2] = x86_64_regs.rdx; - tcp->u_arg[3] = x86_64_regs.r10; - tcp->u_arg[4] = x86_64_regs.r8; - tcp->u_arg[5] = x86_64_regs.r9; -# ifdef X32 - tcp->ext_arg[0] = x86_64_regs.rdi; - tcp->ext_arg[1] = x86_64_regs.rsi; - tcp->ext_arg[2] = x86_64_regs.rdx; - tcp->ext_arg[3] = x86_64_regs.r10; - tcp->ext_arg[4] = x86_64_regs.r8; - tcp->ext_arg[5] = x86_64_regs.r9; -# endif - } else { - /* i386 ABI */ - /* Zero-extend from 32 bits */ - /* Use widen_to_long(tcp->u_arg[N]) in syscall handlers - * if you need to use *sign-extended* parameter. - */ - tcp->u_arg[0] = (long)(uint32_t)i386_regs.ebx; - tcp->u_arg[1] = (long)(uint32_t)i386_regs.ecx; - tcp->u_arg[2] = (long)(uint32_t)i386_regs.edx; - tcp->u_arg[3] = (long)(uint32_t)i386_regs.esi; - tcp->u_arg[4] = (long)(uint32_t)i386_regs.edi; - tcp->u_arg[5] = (long)(uint32_t)i386_regs.ebp; - } -#elif defined(MICROBLAZE) - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, (5 + i) * 4, &tcp->u_arg[i]) < 0) - return -1; -#elif defined(CRISV10) || defined(CRISV32) - static const int crisregs[MAX_ARGS] = { - 4*PT_ORIG_R10, 4*PT_R11, 4*PT_R12, - 4*PT_R13 , 4*PT_MOF, 4*PT_SRP - }; - - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, crisregs[i], &tcp->u_arg[i]) < 0) - return -1; -#elif defined(TILE) - for (i = 0; i < nargs; ++i) - tcp->u_arg[i] = tile_regs.regs[i]; -#elif defined(M68K) - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, (i < 5 ? i : i + 2)*4, &tcp->u_arg[i]) < 0) - return -1; -#elif defined(OR1K) - (void)nargs; - for (i = 0; i < 6; ++i) - tcp->u_arg[i] = or1k_regs.gpr[3 + i]; -#elif defined(METAG) - for (i = 0; i < nargs; i++) - /* arguments go backwards from D1Ar1 (D1.3) */ - tcp->u_arg[i] = ((unsigned long *)&metag_regs.dx[3][1])[-i]; -#elif defined(XTENSA) - /* arg0: a6, arg1: a3, arg2: a4, arg3: a5, arg4: a8, arg5: a9 */ - static const int xtensaregs[MAX_ARGS] = { 6, 3, 4, 5, 8, 9 }; - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, REG_A_BASE + xtensaregs[i], &tcp->u_arg[i]) < 0) - return -1; -# elif defined(ARC) - long *arc_args = &arc_regs.scratch.r0; - for (i = 0; i < nargs; ++i) - tcp->u_arg[i] = *arc_args--; - -#else /* Other architecture (32bits specific) */ - for (i = 0; i < nargs; ++i) - if (upeek(tcp->pid, i*4, &tcp->u_arg[i]) < 0) - return -1; -#endif +#include "get_syscall_args.c" return 1; } static void get_error(struct tcb *tcp) { - int u_error = 0; - int check_errno = 1; - if (tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS) { - check_errno = 0; - } -#if defined(S390) || defined(S390X) - if (check_errno && is_negated_errno(s390_regset.gprs[2])) { - tcp->u_rval = -1; - u_error = -s390_regset.gprs[2]; - } - else { - tcp->u_rval = s390_regset.gprs[2]; - } -#elif defined(I386) - if (check_errno && is_negated_errno(i386_regs.eax)) { - tcp->u_rval = -1; - u_error = -i386_regs.eax; - } - else { - tcp->u_rval = i386_regs.eax; - } -#elif defined(X86_64) || defined(X32) - /* - * In X32, return value is 64-bit (llseek uses one). - * Using merely "long rax" would not work. - */ - long long rax; + const bool check_errno = !(tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS); + tcp->u_error = 0; - if (x86_io.iov_len == sizeof(i386_regs)) { - /* Sign extend from 32 bits */ - rax = (int32_t) i386_regs.eax; - } else { - rax = x86_64_regs.rax; - } - if (check_errno && is_negated_errno(rax)) { - tcp->u_rval = -1; - u_error = -rax; - } - else { - tcp->u_rval = rax; -# ifdef X32 - /* tcp->u_rval contains a truncated value */ - tcp->u_lrval = rax; -# endif - } -#elif defined(IA64) - if (ia64_ia32mode) { - int err = ia64_regs.gr[8]; - if (check_errno && is_negated_errno(err)) { - tcp->u_rval = -1; - u_error = -err; - } - else { - tcp->u_rval = err; - } - } else { - if (check_errno && ia64_regs.gr[10]) { - tcp->u_rval = -1; - u_error = ia64_regs.gr[8]; - } else { - tcp->u_rval = ia64_regs.gr[8]; - } - } -#elif defined(MIPS) - if (check_errno && mips_REG_A3) { - tcp->u_rval = -1; - u_error = mips_REG_V0; - } else { -# if defined LINUX_MIPSN32 - tcp->u_lrval = mips_REG_V0; -# endif - tcp->u_rval = mips_REG_V0; - } -#elif defined(POWERPC) - if (check_errno && (ppc_regs.ccr & 0x10000000)) { - tcp->u_rval = -1; - u_error = ppc_regs.gpr[3]; - } - else { - tcp->u_rval = ppc_regs.gpr[3]; - } -#elif defined(M68K) - if (check_errno && is_negated_errno(m68k_d0)) { - tcp->u_rval = -1; - u_error = -m68k_d0; - } - else { - tcp->u_rval = m68k_d0; - } -#elif defined(ARM) || defined(AARCH64) -# if defined(AARCH64) - if (tcp->currpers == 1) { - if (check_errno && is_negated_errno(aarch64_regs.regs[0])) { - tcp->u_rval = -1; - u_error = -aarch64_regs.regs[0]; - } - else { - tcp->u_rval = aarch64_regs.regs[0]; - } - } - else -# endif - { - if (check_errno && is_negated_errno(arm_regs.ARM_r0)) { - tcp->u_rval = -1; - u_error = -arm_regs.ARM_r0; - } - else { - tcp->u_rval = arm_regs.ARM_r0; - } - } -#elif defined(AVR32) - if (check_errno && avr32_regs.r12 && (unsigned) -avr32_regs.r12 < nerrnos) { - tcp->u_rval = -1; - u_error = -avr32_regs.r12; - } - else { - tcp->u_rval = avr32_regs.r12; - } -#elif defined(BFIN) - if (check_errno && is_negated_errno(bfin_r0)) { - tcp->u_rval = -1; - u_error = -bfin_r0; - } else { - tcp->u_rval = bfin_r0; - } -#elif defined(ALPHA) - if (check_errno && alpha_a3) { - tcp->u_rval = -1; - u_error = alpha_r0; - } - else { - tcp->u_rval = alpha_r0; - } -#elif defined(SPARC) - if (check_errno && sparc_regs.psr & PSR_C) { - tcp->u_rval = -1; - u_error = sparc_regs.u_regs[U_REG_O0]; - } - else { - tcp->u_rval = sparc_regs.u_regs[U_REG_O0]; - } -#elif defined(SPARC64) - if (check_errno && sparc_regs.tstate & 0x1100000000UL) { - tcp->u_rval = -1; - u_error = sparc_regs.u_regs[U_REG_O0]; - } - else { - tcp->u_rval = sparc_regs.u_regs[U_REG_O0]; - } -#elif defined(HPPA) - if (check_errno && is_negated_errno(hppa_r28)) { - tcp->u_rval = -1; - u_error = -hppa_r28; - } - else { - tcp->u_rval = hppa_r28; - } -#elif defined(SH) - if (check_errno && is_negated_errno(sh_r0)) { - tcp->u_rval = -1; - u_error = -sh_r0; - } - else { - tcp->u_rval = sh_r0; - } -#elif defined(SH64) - if (check_errno && is_negated_errno(sh64_r9)) { - tcp->u_rval = -1; - u_error = -sh64_r9; - } - else { - tcp->u_rval = sh64_r9; - } -#elif defined(METAG) - /* result pointer in D0Re0 (D0.0) */ - if (check_errno && is_negated_errno(metag_regs.dx[0][0])) { - tcp->u_rval = -1; - u_error = -metag_regs.dx[0][0]; - } - else { - tcp->u_rval = metag_regs.dx[0][0]; - } -#elif defined(CRISV10) || defined(CRISV32) - if (check_errno && cris_r10 && (unsigned) -cris_r10 < nerrnos) { - tcp->u_rval = -1; - u_error = -cris_r10; - } - else { - tcp->u_rval = cris_r10; - } -#elif defined(TILE) - /* - * The standard tile calling convention returns the value (or negative - * errno) in r0, and zero (or positive errno) in r1. - * Until at least kernel 3.8, however, the r1 value is not reflected - * in ptregs at this point, so we use r0 here. - */ - if (check_errno && is_negated_errno(tile_regs.regs[0])) { - tcp->u_rval = -1; - u_error = -tile_regs.regs[0]; - } else { - tcp->u_rval = tile_regs.regs[0]; - } -#elif defined(MICROBLAZE) - if (check_errno && is_negated_errno(microblaze_r3)) { - tcp->u_rval = -1; - u_error = -microblaze_r3; - } - else { - tcp->u_rval = microblaze_r3; - } -#elif defined(OR1K) - if (check_errno && is_negated_errno(or1k_regs.gpr[11])) { - tcp->u_rval = -1; - u_error = -or1k_regs.gpr[11]; - } - else { - tcp->u_rval = or1k_regs.gpr[11]; - } -#elif defined(XTENSA) - if (check_errno && is_negated_errno(xtensa_a2)) { - tcp->u_rval = -1; - u_error = -xtensa_a2; - } - else { - tcp->u_rval = xtensa_a2; - } -#elif defined(ARC) - if (check_errno && is_negated_errno(arc_regs.scratch.r0)) { - tcp->u_rval = -1; - u_error = -arc_regs.scratch.r0; - } - else { - tcp->u_rval = arc_regs.scratch.r0; - } -#endif - tcp->u_error = u_error; +#include "get_error.c" } /* Returns: @@ -2409,39 +1299,8 @@ get_syscall_result(struct tcb *tcp) { #if defined ARCH_REGS_FOR_GETREGSET || defined ARCH_REGS_FOR_GETREGS /* already done by get_regs */ -#elif defined(BFIN) - if (upeek(tcp->pid, PT_R0, &bfin_r0) < 0) - return -1; -#elif defined(M68K) - if (upeek(tcp->pid, 4*PT_D0, &m68k_d0) < 0) - return -1; -#elif defined(ALPHA) - if (upeek(tcp->pid, REG_A3, &alpha_a3) < 0) - return -1; - if (upeek(tcp->pid, REG_R0, &alpha_r0) < 0) - return -1; -#elif defined(HPPA) - if (upeek(tcp->pid, PT_GR28, &hppa_r28) < 0) - return -1; -#elif defined(SH) - /* new syscall ABI returns result in R0 */ - if (upeek(tcp->pid, 4*REG_REG0, (long *)&sh_r0) < 0) - return -1; -#elif defined(SH64) - /* ABI defines result returned in r9 */ - if (upeek(tcp->pid, REG_GENERAL(9), (long *)&sh64_r9) < 0) - return -1; -#elif defined(CRISV10) || defined(CRISV32) - if (upeek(tcp->pid, 4*PT_R10, &cris_r10) < 0) - return -1; -#elif defined(MICROBLAZE) - if (upeek(tcp->pid, 3 * 4, µblaze_r3) < 0) - return -1; -#elif defined(XTENSA) - if (upeek(tcp->pid, REG_A_BASE + 2, &xtensa_a2) < 0) - return -1; #else -# error get_syscall_result is not implemented for this architecture +# include "get_syscall_result.c" #endif get_error(tcp); return 1; |