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/linux/arch/powerpc/kernel/ptrace/
H A Dptrace-adv.c74 int ptrace_get_debugreg(struct task_struct *child, unsigned long addr, in ptrace_get_debugreg() argument
80 return put_user(child->thread.debug.dac1, datalp); in ptrace_get_debugreg()
140 static long set_instruction_bp(struct task_struct *child, in set_instruction_bp() argument
144 int slot1_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC1) != 0); in set_instruction_bp()
145 int slot2_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC2) != 0); in set_instruction_bp()
146 int slot3_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC3) != 0); in set_instruction_bp()
147 int slot4_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC4) != 0); in set_instruction_bp()
149 if (dbcr_iac_range(child) & DBCR_IAC12MODE) in set_instruction_bp()
151 if (dbcr_iac_range(child) & DBCR_IAC34MODE) in set_instruction_bp()
165 child->thread.debug.iac1 = bp_info->addr; in set_instruction_bp()
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/linux/drivers/mtd/
H A Dmtdpart.c50 struct mtd_info *child; in allocate_partition() local
56 child = kzalloc(sizeof(*child), GFP_KERNEL); in allocate_partition()
58 if (!name || !child) { in allocate_partition()
62 kfree(child); in allocate_partition()
67 child->type = parent->type; in allocate_partition()
68 child->part.flags = parent->flags & ~part->mask_flags; in allocate_partition()
69 child->part.flags |= part->add_flags; in allocate_partition()
70 child->flags = child in allocate_partition()
252 struct mtd_info *child; mtd_add_partition() local
307 struct mtd_info *child, *next; __mtd_del_partition() local
332 struct mtd_info *child, *next; __del_mtd_partitions() local
369 struct mtd_info *child, *master = mtd_get_master(mtd); mtd_del_partition() local
398 struct mtd_info *child, *master = mtd_get_master(parent); add_mtd_partitions() local
585 struct device_node *child; mtd_part_of_parse() local
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/linux/scripts/kconfig/
H A Dgconf.ui21 <child>
28 <child>
32 <child>
38 <child type="submenu">
41 <child>
49 </child>
51 <child>
59 </child>
61 <child>
68 </child>
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/linux/tools/testing/selftests/powerpc/ptrace/
H A Dptrace-perf-hwbreak.c13 * Child subroutine that performs a load on the address, then traps
24 * Child subroutine that performs a load on the first address, then a load on
173 * Checks if we can place at least 2 watchpoints on the child process
186 * Wrapper around a plain fork() call that sets up the child for
187 * ptrace-ing. Both the parent and child return from this, though
188 * the child is stopped until ptrace_cont(pid) is run by the parent.
197 FAIL_IF_MSG(1, "Failed to fork child"); in ptrace_fork_child()
201 FAIL_IF_EXIT_MSG(raise(SIGSTOP), "Child failed to raise SIGSTOP"); in ptrace_fork_child()
203 /* Synchronise on child SIGSTOP */ in ptrace_fork_child()
204 FAIL_IF_MSG(waitpid(*pid, &status, 0) == -1, "Failed to wait for child"); in ptrace_fork_child()
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H A Dptrace.h64 int start_trace(pid_t child) in start_trace() argument
68 ret = ptrace(PTRACE_ATTACH, child, NULL, NULL); in start_trace()
73 ret = waitpid(child, NULL, 0); in start_trace()
74 if (ret != child) { in start_trace()
81 int stop_trace(pid_t child) in stop_trace() argument
85 ret = ptrace(PTRACE_DETACH, child, NULL, NULL); in stop_trace()
93 int cont_trace(pid_t child) in cont_trace() argument
97 ret = ptrace(PTRACE_CONT, child, NULL, NULL); in cont_trace()
105 int ptrace_read_regs(pid_t child, unsigned long type, unsigned long regs[], in ptrace_read_regs() argument
111 FAIL_IF(start_trace(child)); in ptrace_read_regs()
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H A Dptrace-gpr.c22 static int child(void) in child() function
47 int trace_gpr(pid_t child) in trace_gpr() argument
52 FAIL_IF(start_trace(child)); in trace_gpr()
54 // Check child GPRs match what we expect using GETREGS in trace_gpr()
55 FAIL_IF(show_gpr(child, gpr)); in trace_gpr()
58 // Check child FPRs match what we expect using GETFPREGS in trace_gpr()
59 FAIL_IF(show_fpr(child, fpr)); in trace_gpr()
63 // Check child FPRs match what we expect using PEEKUSR in trace_gpr()
64 peeked_fprs = peek_fprs(child); in trace_gpr()
69 // Write child GPRs using SETREGS in trace_gpr()
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/linux/tools/testing/selftests/arm64/fp/
H A Dfp-stress.c63 static void child_start(struct child_data *child, const char *program) in child_start() argument
73 child->pid = fork(); in child_start()
74 if (child->pid == -1) in child_start()
78 if (!child->pid) { in child_start()
80 * In child, replace stdout with the pipe, errors to in child_start()
126 * In parent, remember the child and close our copy of the in child_start()
130 child->stdout = pipefd[0]; in child_start()
131 child->output = NULL; in child_start()
132 child->exited = false; in child_start()
133 child->output_seen = false; in child_start()
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/linux/tools/testing/selftests/arm64/gcs/
H A Dgcs-stress.c59 static void start_thread(struct child_data *child, int id) in start_thread() argument
69 child->pid = fork(); in start_thread()
70 if (child->pid == -1) in start_thread()
74 if (!child->pid) { in start_thread()
76 * In child, replace stdout with the pipe, errors to in start_thread()
123 * In parent, remember the child and close our copy of the in start_thread()
127 child->stdout = pipefd[0]; in start_thread()
128 child->output = NULL; in start_thread()
129 child->exited = false; in start_thread()
130 child->output_seen = false; in start_thread()
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/linux/arch/x86/kernel/
H A Dstep.c14 unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs) in convert_ip_to_linear() argument
38 mutex_lock(&child->mm->context.lock); in convert_ip_to_linear()
39 if (unlikely(!child->mm->context.ldt || in convert_ip_to_linear()
40 seg >= child->mm->context.ldt->nr_entries)) in convert_ip_to_linear()
43 desc = &child->mm->context.ldt->entries[seg]; in convert_ip_to_linear()
51 mutex_unlock(&child->mm->context.lock); in convert_ip_to_linear()
58 static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs) in is_setting_trap_flag() argument
62 unsigned long addr = convert_ip_to_linear(child, regs); in is_setting_trap_flag()
64 copied = access_process_vm(child, addr, opcode, sizeof(opcode), in is_setting_trap_flag()
113 static int enable_single_step(struct task_struct *child) in enable_single_step() argument
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H A Dptrace.c151 * does not yet catch signals sent when the child dies.
374 static int putreg(struct task_struct *child, in putreg() argument
384 return set_segment_reg(child, offset, value); in putreg()
387 return set_flags(child, value); in putreg()
393 x86_fsbase_write_task(child, value); in putreg()
398 x86_gsbase_write_task(child, value); in putreg()
403 *pt_regs_access(task_pt_regs(child), offset) = value; in putreg()
718 void ptrace_disable(struct task_struct *child) in ptrace_disable() argument
720 user_disable_single_step(child); in ptrace_disable()
730 long arch_ptrace(struct task_struct *child, long request, in arch_ptrace() argument
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/linux/tools/testing/selftests/bpf/prog_tests/
H A Duprobe_multi_test.c48 struct child { struct
50 int c2p[2]; /* child -> parent channel */ argument
57 static void release_child(struct child *child) in release_child() argument
61 if (!child) in release_child()
63 close(child->go[1]); in release_child()
64 close(child->go[0]); in release_child()
65 if (child->thread) in release_child()
66 pthread_join(child->thread, NULL); in release_child()
67 close(child->c2p[0]); in release_child()
68 close(child->c2p[1]); in release_child()
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/linux/tools/perf/arch/x86/tests/
H A Dbp-modify.c32 int child = fork(); in spawn_child() local
34 if (child == 0) { in spawn_child()
36 * The child sets itself for as tracee and in spawn_child()
52 return child; in spawn_child()
61 pid_t child; in bp_modify1() local
65 child = spawn_child(); in bp_modify1()
67 waitpid(child, &status, 0); in bp_modify1()
79 * - detaches the child in bp_modify1()
81 if (ptrace(PTRACE_POKEUSER, child, in bp_modify1()
88 if (ptrace(PTRACE_POKEUSER, child, in bp_modify1()
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/linux/arch/m68k/kernel/
H A Dptrace.c32 * does not yet catch signals sent when the child dies.
129 static inline void singlestep_disable(struct task_struct *child) in singlestep_disable() argument
131 unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; in singlestep_disable()
132 put_reg(child, PT_SR, tmp); in singlestep_disable()
133 clear_tsk_thread_flag(child, TIF_DELAYED_TRACE); in singlestep_disable()
139 void ptrace_disable(struct task_struct *child) in ptrace_disable() argument
141 singlestep_disable(child); in ptrace_disable()
144 void user_enable_single_step(struct task_struct *child) in user_enable_single_step() argument
146 unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; in user_enable_single_step()
147 put_reg(child, PT_SR, tmp | T1_BIT); in user_enable_single_step()
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/linux/arch/x86/um/
H A Dptrace_32.c51 int putreg(struct task_struct *child, int regno, unsigned long value) in putreg() argument
67 UPT_SYSCALL_NR(&child->thread.regs.regs) = value; in putreg()
91 child->thread.regs.regs.gp[HOST_EFLAGS] |= value; in putreg()
96 child->thread.regs.regs.gp[reg_offsets[regno]] = value; in putreg()
100 int poke_user(struct task_struct *child, long addr, long data) in poke_user() argument
106 return putreg(child, addr, data); in poke_user()
113 child->thread.arch.debugregs[addr] = data; in poke_user()
119 unsigned long getreg(struct task_struct *child, int regno) in getreg() argument
148 return mask & child->thread.regs.regs.gp[reg_offsets[regno]]; in getreg()
152 int peek_user(struct task_struct *child, long addr, long data) in peek_user() argument
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H A Dptrace_64.c55 int putreg(struct task_struct *child, int regno, unsigned long value) in putreg() argument
79 UPT_SYSCALL_NR(&child->thread.regs.regs) = value; in putreg()
101 child->thread.regs.regs.gp[HOST_EFLAGS] |= value; in putreg()
108 child->thread.regs.regs.gp[reg_offsets[regno >> 3]] = value; in putreg()
112 int poke_user(struct task_struct *child, long addr, long data) in poke_user() argument
118 return putreg(child, addr, data); in poke_user()
125 child->thread.arch.debugregs[addr] = data; in poke_user()
131 unsigned long getreg(struct task_struct *child, int regno) in getreg() argument
169 return mask & child->thread.regs.regs.gp[reg_offsets[regno >> 3]]; in getreg()
172 int peek_user(struct task_struct *child, long addr, long data) in peek_user() argument
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/linux/arch/mips/kernel/
H A Dptrace32.c43 long compat_arch_ptrace(struct task_struct *child, compat_long_t request, in compat_arch_ptrace() argument
73 copied = ptrace_access_vm(child, (u64)addrOthers, &tmp, in compat_arch_ptrace()
86 regs = task_pt_regs(child); in compat_arch_ptrace()
97 if (!tsk_used_math(child)) { in compat_arch_ptrace()
102 fregs = get_fpu_regs(child); in compat_arch_ptrace()
103 if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) { in compat_arch_ptrace()
117 tmp = child->thread.fpu.fcr31; in compat_arch_ptrace()
147 dregs = __get_dsp_regs(child); in compat_arch_ptrace()
157 tmp = child->thread.dsp.dspcontrol; in compat_arch_ptrace()
186 if (ptrace_access_vm(child, (u64)addrOthers, &data, in compat_arch_ptrace()
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/linux/arch/um/kernel/
H A Dptrace.c15 void user_enable_single_step(struct task_struct *child) in user_enable_single_step() argument
17 set_tsk_thread_flag(child, TIF_SINGLESTEP); in user_enable_single_step()
20 SUBARCH_SET_SINGLESTEPPING(child, 1); in user_enable_single_step()
24 void user_disable_single_step(struct task_struct *child) in user_disable_single_step() argument
26 clear_tsk_thread_flag(child, TIF_SINGLESTEP); in user_disable_single_step()
29 SUBARCH_SET_SINGLESTEPPING(child, 0); in user_disable_single_step()
36 void ptrace_disable(struct task_struct *child) in ptrace_disable() argument
38 user_disable_single_step(child); in ptrace_disable()
41 long arch_ptrace(struct task_struct *child, long request, in arch_ptrace() argument
51 ret = peek_user(child, addr, data); in arch_ptrace()
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/linux/tools/testing/selftests/arm64/abi/
H A Dptrace.c32 static void test_tpidr(pid_t child) in test_tpidr() argument
45 ret = ptrace(PTRACE_GETREGSET, child, NT_ARM_TLS, &read_iov); in test_tpidr()
51 ret = ptrace(PTRACE_SETREGSET, child, NT_ARM_TLS, &write_iov); in test_tpidr()
55 ret = ptrace(PTRACE_GETREGSET, child, NT_ARM_TLS, &read_iov); in test_tpidr()
61 ret = ptrace(PTRACE_GETREGSET, child, NT_ARM_TLS, &read_iov); in test_tpidr()
82 ret = ptrace(PTRACE_SETREGSET, child, NT_ARM_TLS, &write_iov); in test_tpidr()
90 ret = ptrace(PTRACE_GETREGSET, child, NT_ARM_TLS, &read_iov); in test_tpidr()
112 ret = ptrace(PTRACE_SETREGSET, child, NT_ARM_TLS, &write_iov); in test_tpidr()
117 ret = ptrace(PTRACE_GETREGSET, child, NT_ARM_TLS, in test_tpidr()
135 static void test_hw_debug(pid_t child, int type, const char *type_name) in test_hw_debug() argument
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/linux/drivers/net/mdio/
H A Dfwnode_mdio.c72 struct fwnode_handle *child, u32 addr) in fwnode_mdiobus_phy_device_register() argument
76 rc = fwnode_irq_get(child, 0); in fwnode_mdiobus_phy_device_register()
92 if (fwnode_property_read_bool(child, "broken-turn-around")) in fwnode_mdiobus_phy_device_register()
98 fwnode_handle_get(child); in fwnode_mdiobus_phy_device_register()
99 device_set_node(&phy->mdio.dev, child); in fwnode_mdiobus_phy_device_register()
107 fwnode_handle_put(child); in fwnode_mdiobus_phy_device_register()
112 child, addr); in fwnode_mdiobus_phy_device_register()
118 struct fwnode_handle *child, u32 addr) in fwnode_mdiobus_phy_device_register()
127 mii_ts = fwnode_find_mii_timestamper(child); in fwnode_mdiobus_register_phy()
131 is_c45 = fwnode_device_is_compatible(child, "etherne in fwnode_mdiobus_register_phy()
123 fwnode_mdiobus_register_phy(struct mii_bus * bus,struct fwnode_handle * child,u32 addr) fwnode_mdiobus_register_phy() argument
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/linux/tools/testing/selftests/cgroup/
H A Dtest_core.c79 * Create a child process that allocates and touches 100MB, then waits to be
80 * killed. Wait until the child is attached to the cgroup, kill all processes
107 /* wait for the child to enter cgroup */ in test_cgcore_destroy()
286 char *grandparent = NULL, *parent = NULL, *child = NULL; in test_cgcore_invalid_domain() local
293 child = cg_name(root, "cg_test_grandparent/cg_test_parent/cg_test_child"); in test_cgcore_invalid_domain()
294 if (!parent || !child || !grandparent) in test_cgcore_invalid_domain()
303 if (cg_create(child)) in test_cgcore_invalid_domain()
309 if (cg_read_strcmp(child, "cgroup.type", "domain invalid\n")) in test_cgcore_invalid_domain()
312 if (!cg_enter_current(child)) in test_cgcore_invalid_domain()
318 if (!clone_into_cgroup_run_wait(child)) in test_cgcore_invalid_domain()
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/linux/arch/alpha/kernel/
H A Dptrace.c42 * does not yet catch signals sent when the child dies.
179 ptrace_set_bpt(struct task_struct * child) in ptrace_set_bpt() argument
185 pc = get_reg(child, REG_PC); in ptrace_set_bpt()
186 res = read_int(child, pc, (int *) &insn); in ptrace_set_bpt()
201 task_thread_info(child)->bpt_addr[nsaved++] = pc + 4; in ptrace_set_bpt()
203 task_thread_info(child)->bpt_addr[nsaved++] in ptrace_set_bpt()
208 task_thread_info(child)->bpt_addr[nsaved++] = get_reg(child, reg_b); in ptrace_set_bpt()
211 task_thread_info(child)->bpt_addr[nsaved++] = pc + 4; in ptrace_set_bpt()
217 res = read_int(child, task_thread_info(child)->bpt_addr[i], in ptrace_set_bpt()
221 task_thread_info(child)->bpt_insn[i] = insn; in ptrace_set_bpt()
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/linux/tools/testing/selftests/landlock/
H A Dptrace_test.c100 * Test multiple tracing combinations between a parent process P1 and a child
124 * Child domain
157 * Parent + child domain (siblings)
191 * Inherited + child domain
227 * Inherited + parent and child domain (siblings)
254 /* Test PTRACE_TRACEME and PTRACE_ATTACH for parent and child. */ in TEST_F()
257 pid_t child, parent; in TEST_F()
273 * can_read_child is true if a parent process can read its child in TEST_F()
275 * isolated from the child with a dedicated Landlock domain. in TEST_F()
280 * can_trace_child is true if a parent process can trace its child in TEST_F()
255 pid_t child, parent; TEST_F() local
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/linux/tools/testing/selftests/pidfd/
H A Dpidfd_getfd_test.c25 * UNKNOWN_FD is an fd number that should never exist in the child, as it is
48 fprintf(stderr, "%s: Child could not set DEATHSIG\n", in __child()
55 fprintf(stderr, "%s: Child failed to send fd number\n", in __child()
63 * This blocking recv enables the parent to message the child. in __child()
67 * indicating that the child should exit. in __child()
74 "%s: Child failed to disable ptrace\n", in __child()
79 fprintf(stderr, "Child received unknown command %c\n", in __child()
85 fprintf(stderr, "%s: Child failed to ack\n", in __child()
91 fprintf(stderr, "%s: Child failed to read from socket\n", in __child()
99 static int child(int sk) in child() function
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/linux/include/linux/
H A Dproperty.h163 const struct fwnode_handle *fwnode, struct fwnode_handle *child);
165 const struct fwnode_handle *fwnode, struct fwnode_handle *child);
167 #define fwnode_for_each_child_node(fwnode, child) \ argument
168 for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
169 child = fwnode_get_next_child_node(fwnode, child))
171 #define fwnode_for_each_named_child_node(fwnode, child, name) \ argument
172 fwnode_for_each_child_node(fwnode, child) \
173 for_each_if(fwnode_name_eq(child, name))
175 #define fwnode_for_each_available_child_node(fwnode, child) \ argument
176 for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
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/linux/tools/testing/selftests/ptrace/
H A Dpeeksiginfo.c44 static int check_error_paths(pid_t child) in check_error_paths() argument
73 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_rw); in check_error_paths()
83 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, in check_error_paths()
91 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_ro); in check_error_paths()
105 int check_direct_path(pid_t child, int shared, int nr) in check_direct_path() argument
122 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, siginfo); in check_direct_path()
157 pid_t child; in main() local
163 child = fork(); in main()
164 if (child == -1) { in main()
167 } else if (child == 0) { in main()
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