Searched hist:202882 (Results 1 - 4 of 4) sorted by relevance
| /freebsd-11-stable/sys/amd64/ia32/ | ||
| H A D | ia32_syscall.c | diff 202882 Sat Jan 23 09:51:23 MST 2010 kib For PT_TO_SCE stop that stops the ptraced process upon syscall entry, syscall arguments are collected before ptracestop() is called. As a consequence, debugger cannot modify syscall or its arguments. For i386, amd64 and ia32 on amd64 MD syscall(), reread syscall number and arguments after ptracestop(), if debugger modified anything in the process environment. Since procfs stopeven requires number of syscall arguments in p_xstat, this cannot be solved by moving stop/trace point before argument fetching. Move the code to read arguments into separate function fetch_syscall_args() to avoid code duplication. Note that ktrace point for modified syscall is intentionally recorded twice, once with original arguments, and second time with the arguments set by debugger. PT_TO_SCX stop is executed after cpu_syscall_set_retval() already. Reported by: Ali Polatel <alip exherbo org> Briefly discussed with: jhb MFC after: 3 weeks |
| /freebsd-11-stable/sys/kern/ | ||
| H A D | kern_procctl.c | diff 202882 Sat Jan 23 09:51:23 MST 2010 kib For PT_TO_SCE stop that stops the ptraced process upon syscall entry, syscall arguments are collected before ptracestop() is called. As a consequence, debugger cannot modify syscall or its arguments. For i386, amd64 and ia32 on amd64 MD syscall(), reread syscall number and arguments after ptracestop(), if debugger modified anything in the process environment. Since procfs stopeven requires number of syscall arguments in p_xstat, this cannot be solved by moving stop/trace point before argument fetching. Move the code to read arguments into separate function fetch_syscall_args() to avoid code duplication. Note that ktrace point for modified syscall is intentionally recorded twice, once with original arguments, and second time with the arguments set by debugger. PT_TO_SCX stop is executed after cpu_syscall_set_retval() already. Reported by: Ali Polatel <alip exherbo org> Briefly discussed with: jhb MFC after: 3 weeks |
| H A D | sys_process.c | diff 202882 Sat Jan 23 09:51:23 MST 2010 kib For PT_TO_SCE stop that stops the ptraced process upon syscall entry, syscall arguments are collected before ptracestop() is called. As a consequence, debugger cannot modify syscall or its arguments. For i386, amd64 and ia32 on amd64 MD syscall(), reread syscall number and arguments after ptracestop(), if debugger modified anything in the process environment. Since procfs stopeven requires number of syscall arguments in p_xstat, this cannot be solved by moving stop/trace point before argument fetching. Move the code to read arguments into separate function fetch_syscall_args() to avoid code duplication. Note that ktrace point for modified syscall is intentionally recorded twice, once with original arguments, and second time with the arguments set by debugger. PT_TO_SCX stop is executed after cpu_syscall_set_retval() already. Reported by: Ali Polatel <alip exherbo org> Briefly discussed with: jhb MFC after: 3 weeks |
| /freebsd-11-stable/sys/sys/ | ||
| H A D | proc.h | diff 202882 Sat Jan 23 09:51:23 MST 2010 kib For PT_TO_SCE stop that stops the ptraced process upon syscall entry, syscall arguments are collected before ptracestop() is called. As a consequence, debugger cannot modify syscall or its arguments. For i386, amd64 and ia32 on amd64 MD syscall(), reread syscall number and arguments after ptracestop(), if debugger modified anything in the process environment. Since procfs stopeven requires number of syscall arguments in p_xstat, this cannot be solved by moving stop/trace point before argument fetching. Move the code to read arguments into separate function fetch_syscall_args() to avoid code duplication. Note that ktrace point for modified syscall is intentionally recorded twice, once with original arguments, and second time with the arguments set by debugger. PT_TO_SCX stop is executed after cpu_syscall_set_retval() already. Reported by: Ali Polatel <alip exherbo org> Briefly discussed with: jhb MFC after: 3 weeks |
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