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-rw-r--r--arch/sparc/include/asm/ptrace.h4
-rw-r--r--arch/sparc/include/asm/thread_info_64.h16
-rw-r--r--arch/sparc/kernel/etrap_64.S8
-rw-r--r--arch/sparc/kernel/syscalls.S31
-rw-r--r--arch/sparc/kernel/traps_64.c2
5 files changed, 31 insertions, 30 deletions
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index eeed804316bf..fd9c3f21cbf0 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -202,7 +202,9 @@ struct global_reg_snapshot {
};
extern struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
-#define force_successful_syscall_return() set_thread_noerror(1)
+#define force_successful_syscall_return() \
+do { current_thread_info()->syscall_noerror = 1; \
+} while (0)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) ((regs)->tpc = (val))
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 8511e5fcc97d..cfa8c38fb9c8 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -18,12 +18,10 @@
#define TI_FLAG_CWP_SHIFT 40
#define TI_FLAG_BYTE_CURRENT_DS 3
#define TI_FLAG_CURRENT_DS_SHIFT 32
-#define TI_FLAG_BYTE_NOERROR 4
-#define TI_FLAG_BYTE_NOERROR_SHIFT 24
-#define TI_FLAG_BYTE_FPDEPTH 5
-#define TI_FLAG_FPDEPTH_SHIFT 16
-#define TI_FLAG_BYTE_WSAVED 6
-#define TI_FLAG_WSAVED_SHIFT 8
+#define TI_FLAG_BYTE_FPDEPTH 4
+#define TI_FLAG_FPDEPTH_SHIFT 24
+#define TI_FLAG_BYTE_WSAVED 5
+#define TI_FLAG_WSAVED_SHIFT 16
#include <asm/page.h>
@@ -49,7 +47,7 @@ struct thread_info {
struct exec_domain *exec_domain;
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u8 new_child;
- __u8 __pad;
+ __u8 syscall_noerror;
__u16 cpu;
unsigned long *utraps;
@@ -79,7 +77,6 @@ struct thread_info {
#define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
-#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
#define TI_FPSAVED 0x00000010
#define TI_KSP 0x00000018
#define TI_FAULT_ADDR 0x00000020
@@ -87,6 +84,7 @@ struct thread_info {
#define TI_EXEC_DOMAIN 0x00000030
#define TI_PRE_COUNT 0x00000038
#define TI_NEW_CHILD 0x0000003c
+#define TI_SYS_NOERROR 0x0000003d
#define TI_CPU 0x0000003e
#define TI_UTRAPS 0x00000040
#define TI_REG_WINDOW 0x00000048
@@ -157,8 +155,6 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
#define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
#define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
-#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
-#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
diff --git a/arch/sparc/kernel/etrap_64.S b/arch/sparc/kernel/etrap_64.S
index 1276ca2567ba..786b185e6e3f 100644
--- a/arch/sparc/kernel/etrap_64.S
+++ b/arch/sparc/kernel/etrap_64.S
@@ -92,10 +92,8 @@ etrap_save: save %g2, -STACK_BIAS, %sp
rdpr %wstate, %g2
wrpr %g0, 0, %canrestore
sll %g2, 3, %g2
-
- /* Set TI_SYS_FPDEPTH to 1 and clear TI_SYS_NOERROR. */
mov 1, %l5
- sth %l5, [%l6 + TI_SYS_NOERROR]
+ stb %l5, [%l6 + TI_FPDEPTH]
wrpr %g3, 0, %otherwin
wrpr %g2, 0, %wstate
@@ -154,9 +152,7 @@ etrap_save: save %g2, -STACK_BIAS, %sp
add %l6, TI_FPSAVED + 1, %l4
srl %l5, 1, %l3
add %l5, 2, %l5
-
- /* Set TI_SYS_FPDEPTH to %l5 and clear TI_SYS_NOERROR. */
- sth %l5, [%l6 + TI_SYS_NOERROR]
+ stb %l5, [%l6 + TI_FPDEPTH]
ba,pt %xcc, 2b
stb %g0, [%l4 + %l3]
nop
diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index b0ac10306425..1d7e274f3f2b 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -212,19 +212,24 @@ linux_sparc_syscall:
3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
ret_sys_call:
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
+ ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
sra %o0, 0, %o0
mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
sllx %g2, 32, %g2
+ /* Check if force_successful_syscall_return()
+ * was invoked.
+ */
+ ldub [%g6 + TI_SYS_NOERROR], %l2
+ brnz,a,pn %l2, 80f
+ stb %g0, [%g6 + TI_SYS_NOERROR]
+
cmp %o0, -ERESTART_RESTARTBLOCK
bgeu,pn %xcc, 1f
- andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
- ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
-
-2:
+ andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6
+80:
/* System call success, clear Carry condition code. */
andn %g3, %g2, %g3
-3:
stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
bne,pn %icc, linux_syscall_trace2
add %l1, 0x4, %l2 ! npc = npc+4
@@ -233,20 +238,20 @@ ret_sys_call:
stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
1:
- /* Check if force_successful_syscall_return()
- * was invoked.
- */
- ldub [%g6 + TI_SYS_NOERROR], %l2
- brnz,pn %l2, 2b
- ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
/* System call failure, set Carry condition code.
* Also, get abs(errno) to return to the process.
*/
+ andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6
sub %g0, %o0, %o0
+ or %g3, %g2, %g3
stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
- ba,pt %xcc, 3b
- or %g3, %g2, %g3
+ stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
+ bne,pn %icc, linux_syscall_trace2
+ add %l1, 0x4, %l2 ! npc = npc+4
+ stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
+ b,pt %xcc, rtrap
+ stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
linux_syscall_trace2:
call syscall_trace_leave
add %sp, PTREGS_OFF, %o0
diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index 82af591fe43f..fa1f1d375ffc 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -2547,6 +2547,8 @@ void __init trap_init(void)
TI_PRE_COUNT != offsetof(struct thread_info,
preempt_count) ||
TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
+ TI_SYS_NOERROR != offsetof(struct thread_info,
+ syscall_noerror) ||
TI_RESTART_BLOCK != offsetof(struct thread_info,
restart_block) ||
TI_KUNA_REGS != offsetof(struct thread_info,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.