diff options
Diffstat (limited to 'syscall.c')
| -rw-r--r-- | syscall.c | 51 |
1 files changed, 51 insertions, 0 deletions
@@ -994,6 +994,55 @@ undefined_scno_name(struct tcb *tcp) return buf; } +#ifdef POWERPC +/* + * PTRACE_GETREGS was added to the PowerPC kernel in v2.6.23, so we + * provide a slow fallback for very old kernels. + */ + +static long powerpc_getreg(pid_t pid, unsigned long offset, unsigned long *p) +{ + long val; + + errno = 0; + val = ptrace(PTRACE_PEEKUSER, pid, (char *)offset, 0); + if (val == -1 && errno) + return -1; + + *p = val; + return 0; +} + +static long powerpc_getregs_old(pid_t pid) +{ + int i; + long r; + + r = powerpc_getreg(pid, sizeof(unsigned long) * PT_MSR, &ppc_regs.msr); + if (r) + goto out; + + r = powerpc_getreg(pid, sizeof(unsigned long) * PT_CCR, &ppc_regs.ccr); + if (r) + goto out; + + r = powerpc_getreg(pid, sizeof(unsigned long) * PT_ORIG_R3, + &ppc_regs.orig_gpr3); + if (r) + goto out; + + for (i = 0; i <= 8; i++) { + r = powerpc_getreg(pid, sizeof(unsigned long) * (PT_R0 + i), + &ppc_regs.gpr[i]); + if (r) + goto out; + } + +out: + return r; +} +#endif + #ifndef get_regs long get_regs_error; @@ -1042,6 +1091,8 @@ get_regs(pid_t pid) get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&sparc_regs, 0); # elif defined(POWERPC) get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, (long) &ppc_regs); + if (get_regs_error && errno == EIO) + get_regs_error = powerpc_getregs_old(pid); /* try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS */ # else |