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-rw-r--r--arch/parisc/Kconfig12
-rw-r--r--arch/parisc/include/asm/bitops.h6
-rw-r--r--arch/parisc/include/asm/floppy.h11
-rw-r--r--arch/parisc/include/asm/perf_event.h8
-rw-r--r--arch/parisc/include/asm/processor.h2
-rw-r--r--arch/parisc/include/asm/video.h2
-rw-r--r--arch/parisc/include/uapi/asm/ioctls.h8
-rw-r--r--arch/parisc/include/uapi/asm/perf_regs.h63
-rw-r--r--arch/parisc/kernel/Makefile1
-rw-r--r--arch/parisc/kernel/asm-offsets.c1
-rw-r--r--arch/parisc/kernel/cache.c6
-rw-r--r--arch/parisc/kernel/drivers.c6
-rw-r--r--arch/parisc/kernel/firmware.c3
-rw-r--r--arch/parisc/kernel/perf_event.c27
-rw-r--r--arch/parisc/kernel/perf_regs.c61
-rw-r--r--arch/parisc/kernel/process.c2
-rw-r--r--arch/parisc/kernel/sys_parisc.c2
-rw-r--r--arch/parisc/kernel/traps.c2
-rw-r--r--arch/parisc/kernel/unaligned.c2
-rw-r--r--arch/parisc/lib/memcpy.c1
20 files changed, 194 insertions, 32 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 2efa4b08b7b8..47fd9662d800 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -31,6 +31,9 @@ config PARISC
select HAVE_KERNEL_UNCOMPRESSED
select HAVE_PCI
select HAVE_PERF_EVENTS
+ select HAVE_PERF_REGS
+ select HAVE_PERF_USER_STACK_DUMP
+ select PERF_USE_VMALLOC
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZ4
@@ -44,6 +47,7 @@ config PARISC
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_SMP_IDLE_THREAD
select GENERIC_ARCH_TOPOLOGY if SMP
+ select ARCH_SUPPORTS_SCHED_MC if SMP && PA8X00
select GENERIC_CPU_DEVICES if !SMP
select GENERIC_LIB_DEVMEM_IS_ALLOWED
select SYSCTL_ARCH_UNALIGN_ALLOW
@@ -319,14 +323,6 @@ config SMP
If you don't know what to do here, say N.
-config SCHED_MC
- bool "Multi-core scheduler support"
- depends on GENERIC_ARCH_TOPOLOGY && PA8X00
- help
- Multi-core scheduler support improves the CPU scheduler's decision
- making when dealing with multi-core CPU chips at a cost of slightly
- increased overhead in some places. If unsure say N here.
-
config IRQSTACKS
bool "Use separate kernel stacks when processing interrupts"
default y
diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h
index 0ec9cfc5131f..bd1280a8a5ec 100644
--- a/arch/parisc/include/asm/bitops.h
+++ b/arch/parisc/include/asm/bitops.h
@@ -123,7 +123,7 @@ static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
* cycles for each mispredicted branch.
*/
-static __inline__ unsigned long __ffs(unsigned long x)
+static __inline__ __attribute_const__ unsigned long __ffs(unsigned long x)
{
unsigned long ret;
@@ -161,7 +161,7 @@ static __inline__ unsigned long __ffs(unsigned long x)
* This is defined the same way as the libc and compiler builtin
* ffs routines, therefore differs in spirit from the above ffz (man ffs).
*/
-static __inline__ int ffs(int x)
+static __inline__ __attribute_const__ int ffs(int x)
{
return x ? (__ffs((unsigned long)x) + 1) : 0;
}
@@ -171,7 +171,7 @@ static __inline__ int ffs(int x)
* fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
*/
-static __inline__ int fls(unsigned int x)
+static __inline__ __attribute_const__ int fls(unsigned int x)
{
int ret;
if (!x)
diff --git a/arch/parisc/include/asm/floppy.h b/arch/parisc/include/asm/floppy.h
index b318a7df52f6..f15b69fea901 100644
--- a/arch/parisc/include/asm/floppy.h
+++ b/arch/parisc/include/asm/floppy.h
@@ -8,9 +8,9 @@
#ifndef __ASM_PARISC_FLOPPY_H
#define __ASM_PARISC_FLOPPY_H
+#include <linux/sizes.h>
#include <linux/vmalloc.h>
-
/*
* The DMA channel used by the floppy controller cannot access data at
* addresses >= 16MB
@@ -20,15 +20,12 @@
* floppy accesses go through the track buffer.
*/
#define _CROSS_64KB(a,s,vdma) \
-(!(vdma) && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
-
-#define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)
-
+ (!(vdma) && \
+ ((unsigned long)(a) / SZ_64K != ((unsigned long)(a) + (s) - 1) / SZ_64K))
#define SW fd_routine[use_virtual_dma&1]
#define CSW fd_routine[can_use_virtual_dma & 1]
-
#define fd_inb(base, reg) readb((base) + (reg))
#define fd_outb(value, base, reg) writeb(value, (base) + (reg))
@@ -206,7 +203,7 @@ static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
{
#ifdef FLOPPY_SANITY_CHECK
- if (CROSS_64KB(addr, size)) {
+ if (_CROSS_64KB(addr, size, use_virtual_dma & 1)) {
printk("DMA crossing 64-K boundary %p-%p\n", addr, addr+size);
return -1;
}
diff --git a/arch/parisc/include/asm/perf_event.h b/arch/parisc/include/asm/perf_event.h
index 1e0fd8ba6c03..8a2925029d15 100644
--- a/arch/parisc/include/asm/perf_event.h
+++ b/arch/parisc/include/asm/perf_event.h
@@ -1,6 +1,12 @@
#ifndef __ASM_PARISC_PERF_EVENT_H
#define __ASM_PARISC_PERF_EVENT_H
-/* Empty, just to avoid compiling error */
+#include <asm/psw.h>
+
+#define perf_arch_fetch_caller_regs(regs, __ip) { \
+ (regs)->gr[0] = KERNEL_PSW; \
+ (regs)->iaoq[0] = (__ip); \
+ asm volatile("copy %%sp, %0\n":"=r"((regs)->gr[30])); \
+}
#endif /* __ASM_PARISC_PERF_EVENT_H */
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 4c14bde39aac..dd0b5e199559 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -48,7 +48,7 @@
#ifndef __ASSEMBLER__
struct rlimit;
-unsigned long mmap_upper_limit(struct rlimit *rlim_stack);
+unsigned long mmap_upper_limit(const struct rlimit *rlim_stack);
unsigned long calc_max_stack_size(unsigned long stack_max);
/*
diff --git a/arch/parisc/include/asm/video.h b/arch/parisc/include/asm/video.h
index c5dff3223194..a9d50ebd6e76 100644
--- a/arch/parisc/include/asm/video.h
+++ b/arch/parisc/include/asm/video.h
@@ -6,7 +6,7 @@
struct device;
-#if defined(CONFIG_STI_CORE)
+#if defined(CONFIG_STI_CORE) && defined(CONFIG_VIDEO)
bool video_is_primary_device(struct device *dev);
#define video_is_primary_device video_is_primary_device
#endif
diff --git a/arch/parisc/include/uapi/asm/ioctls.h b/arch/parisc/include/uapi/asm/ioctls.h
index 82d1148c6379..74b4027a4e80 100644
--- a/arch/parisc/include/uapi/asm/ioctls.h
+++ b/arch/parisc/include/uapi/asm/ioctls.h
@@ -10,10 +10,10 @@
#define TCSETS _IOW('T', 17, struct termios) /* TCSETATTR */
#define TCSETSW _IOW('T', 18, struct termios) /* TCSETATTRD */
#define TCSETSF _IOW('T', 19, struct termios) /* TCSETATTRF */
-#define TCGETA _IOR('T', 1, struct termio)
-#define TCSETA _IOW('T', 2, struct termio)
-#define TCSETAW _IOW('T', 3, struct termio)
-#define TCSETAF _IOW('T', 4, struct termio)
+#define TCGETA 0x40125401
+#define TCSETA 0x80125402
+#define TCSETAW 0x80125403
+#define TCSETAF 0x80125404
#define TCSBRK _IO('T', 5)
#define TCXONC _IO('T', 6)
#define TCFLSH _IO('T', 7)
diff --git a/arch/parisc/include/uapi/asm/perf_regs.h b/arch/parisc/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..1ae687bb3d3c
--- /dev/null
+++ b/arch/parisc/include/uapi/asm/perf_regs.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_PARISC_PERF_REGS_H
+#define _UAPI_ASM_PARISC_PERF_REGS_H
+
+/* see struct user_regs_struct */
+enum perf_event_parisc_regs {
+ PERF_REG_PARISC_R0, /* PSW is in gr[0] */
+ PERF_REG_PARISC_R1,
+ PERF_REG_PARISC_R2,
+ PERF_REG_PARISC_R3,
+ PERF_REG_PARISC_R4,
+ PERF_REG_PARISC_R5,
+ PERF_REG_PARISC_R6,
+ PERF_REG_PARISC_R7,
+ PERF_REG_PARISC_R8,
+ PERF_REG_PARISC_R9,
+ PERF_REG_PARISC_R10,
+ PERF_REG_PARISC_R11,
+ PERF_REG_PARISC_R12,
+ PERF_REG_PARISC_R13,
+ PERF_REG_PARISC_R14,
+ PERF_REG_PARISC_R15,
+ PERF_REG_PARISC_R16,
+ PERF_REG_PARISC_R17,
+ PERF_REG_PARISC_R18,
+ PERF_REG_PARISC_R19,
+ PERF_REG_PARISC_R20,
+ PERF_REG_PARISC_R21,
+ PERF_REG_PARISC_R22,
+ PERF_REG_PARISC_R23,
+ PERF_REG_PARISC_R24,
+ PERF_REG_PARISC_R25,
+ PERF_REG_PARISC_R26,
+ PERF_REG_PARISC_R27,
+ PERF_REG_PARISC_R28,
+ PERF_REG_PARISC_R29,
+ PERF_REG_PARISC_R30,
+ PERF_REG_PARISC_R31,
+
+ PERF_REG_PARISC_SR0,
+ PERF_REG_PARISC_SR1,
+ PERF_REG_PARISC_SR2,
+ PERF_REG_PARISC_SR3,
+ PERF_REG_PARISC_SR4,
+ PERF_REG_PARISC_SR5,
+ PERF_REG_PARISC_SR6,
+ PERF_REG_PARISC_SR7,
+
+ PERF_REG_PARISC_IAOQ0,
+ PERF_REG_PARISC_IAOQ1,
+ PERF_REG_PARISC_IASQ0,
+ PERF_REG_PARISC_IASQ1,
+
+ PERF_REG_PARISC_SAR, /* CR11 */
+ PERF_REG_PARISC_IIR, /* CR19 */
+ PERF_REG_PARISC_ISR, /* CR20 */
+ PERF_REG_PARISC_IOR, /* CR21 */
+ PERF_REG_PARISC_IPSW, /* CR22 */
+
+ PERF_REG_PARISC_MAX
+};
+
+#endif /* _UAPI_ASM_PARISC_PERF_REGS_H */
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index d5055ba33722..9157bc8bdf41 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += topology.o
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_regs.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_KEXEC_CORE) += kexec.o relocate_kernel.o
diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c
index 757816a7bd4b..9abfe65492c6 100644
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -13,6 +13,7 @@
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
* Copyright (C) 2003 James Bottomley <jejb at parisc-linux.org>
*/
+#define COMPILE_OFFSETS
#include <linux/types.h>
#include <linux/sched.h>
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 37ca484cc495..4c5240d3a3c7 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -122,10 +122,10 @@ void __update_cache(pte_t pte)
pfn = folio_pfn(folio);
nr = folio_nr_pages(folio);
if (folio_flush_mapping(folio) &&
- test_bit(PG_dcache_dirty, &folio->flags)) {
+ test_bit(PG_dcache_dirty, &folio->flags.f)) {
while (nr--)
flush_kernel_dcache_page_addr(pfn_va(pfn + nr));
- clear_bit(PG_dcache_dirty, &folio->flags);
+ clear_bit(PG_dcache_dirty, &folio->flags.f);
} else if (parisc_requires_coherency())
while (nr--)
flush_kernel_dcache_page_addr(pfn_va(pfn + nr));
@@ -481,7 +481,7 @@ void flush_dcache_folio(struct folio *folio)
pgoff_t pgoff;
if (mapping && !mapping_mapped(mapping)) {
- set_bit(PG_dcache_dirty, &folio->flags);
+ set_bit(PG_dcache_dirty, &folio->flags.f);
return;
}
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index 1e793f770f71..1f8936fc2292 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -995,6 +995,7 @@ static __init int qemu_print_iodc_data(struct device *lin_dev, void *data)
struct pdc_system_map_mod_info pdc_mod_info;
struct pdc_module_path mod_path;
+ memset(&iodc_data, 0, sizeof(iodc_data));
status = pdc_iodc_read(&count, hpa, 0,
&iodc_data, sizeof(iodc_data));
if (status != PDC_OK) {
@@ -1012,6 +1013,11 @@ static __init int qemu_print_iodc_data(struct device *lin_dev, void *data)
mod_index = 0;
do {
+ /* initialize device path for old machines */
+ memset(&mod_path, 0xff, sizeof(mod_path));
+ get_node_path(dev->dev.parent, &mod_path.path);
+ mod_path.path.mod = dev->hw_path;
+ memset(&pdc_mod_info, 0, sizeof(pdc_mod_info));
status = pdc_system_map_find_mods(&pdc_mod_info,
&mod_path, mod_index++);
} while (status == PDC_OK && pdc_mod_info.mod_addr != hpa);
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index c69f6d5946e9..042343492a28 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -464,7 +464,8 @@ int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
unsigned long flags;
spin_lock_irqsave(&pdc_lock, flags);
- retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
+ memcpy(pdc_result2, mod_path, sizeof(*mod_path));
+ retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
__pa(pdc_result2), mod_index);
convert_to_wide(pdc_result);
memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
diff --git a/arch/parisc/kernel/perf_event.c b/arch/parisc/kernel/perf_event.c
new file mode 100644
index 000000000000..f90b83886ab4
--- /dev/null
+++ b/arch/parisc/kernel/perf_event.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Performance event support for parisc
+ *
+ * Copyright (C) 2025 by Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/perf_event.h>
+#include <asm/unwind.h>
+
+void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
+{
+
+ struct unwind_frame_info info;
+
+ unwind_frame_init_task(&info, current, NULL);
+ while (1) {
+ if (unwind_once(&info) < 0 || info.ip == 0)
+ break;
+
+ if (!__kernel_text_address(info.ip) ||
+ perf_callchain_store(entry, info.ip))
+ return;
+ }
+}
diff --git a/arch/parisc/kernel/perf_regs.c b/arch/parisc/kernel/perf_regs.c
new file mode 100644
index 000000000000..68458e2f6197
--- /dev/null
+++ b/arch/parisc/kernel/perf_regs.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Copyright (C) 2025 by Helge Deller <deller@gmx.de> */
+
+#include <linux/perf_event.h>
+#include <linux/perf_regs.h>
+#include <asm/ptrace.h>
+
+u64 perf_reg_value(struct pt_regs *regs, int idx)
+{
+ switch (idx) {
+ case PERF_REG_PARISC_R0 ... PERF_REG_PARISC_R31:
+ return regs->gr[idx - PERF_REG_PARISC_R0];
+ case PERF_REG_PARISC_SR0 ... PERF_REG_PARISC_SR7:
+ return regs->sr[idx - PERF_REG_PARISC_SR0];
+ case PERF_REG_PARISC_IASQ0 ... PERF_REG_PARISC_IASQ1:
+ return regs->iasq[idx - PERF_REG_PARISC_IASQ0];
+ case PERF_REG_PARISC_IAOQ0 ... PERF_REG_PARISC_IAOQ1:
+ return regs->iasq[idx - PERF_REG_PARISC_IAOQ0];
+ case PERF_REG_PARISC_SAR: /* CR11 */
+ return regs->sar;
+ case PERF_REG_PARISC_IIR: /* CR19 */
+ return regs->iir;
+ case PERF_REG_PARISC_ISR: /* CR20 */
+ return regs->isr;
+ case PERF_REG_PARISC_IOR: /* CR21 */
+ return regs->ior;
+ case PERF_REG_PARISC_IPSW: /* CR22 */
+ return regs->ipsw;
+ };
+ WARN_ON_ONCE((u32)idx >= PERF_REG_PARISC_MAX);
+ return 0;
+}
+
+#define REG_RESERVED (~((1ULL << PERF_REG_PARISC_MAX) - 1))
+
+int perf_reg_validate(u64 mask)
+{
+ if (!mask || mask & REG_RESERVED)
+ return -EINVAL;
+
+ return 0;
+}
+
+u64 perf_reg_abi(struct task_struct *task)
+{
+ if (!IS_ENABLED(CONFIG_64BIT))
+ return PERF_SAMPLE_REGS_ABI_32;
+
+ if (test_tsk_thread_flag(task, TIF_32BIT))
+ return PERF_SAMPLE_REGS_ABI_32;
+
+ return PERF_SAMPLE_REGS_ABI_64;
+}
+
+void perf_get_regs_user(struct perf_regs *regs_user,
+ struct pt_regs *regs)
+{
+ regs_user->regs = task_pt_regs(current);
+ regs_user->abi = perf_reg_abi(current);
+}
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index ed93bd8c1545..e64ab5d2a40d 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -201,7 +201,7 @@ arch_initcall(parisc_idle_init);
int
copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
{
- unsigned long clone_flags = args->flags;
+ u64 clone_flags = args->flags;
unsigned long usp = args->stack;
unsigned long tls = args->tls;
struct pt_regs *cregs = &(p->thread.regs);
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index f852fe274abe..b2cdbb8a12b1 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -77,7 +77,7 @@ unsigned long calc_max_stack_size(unsigned long stack_max)
* indicating that "current" should be used instead of a passed-in
* value from the exec bprm as done with arch_pick_mmap_layout().
*/
-unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
+unsigned long mmap_upper_limit(const struct rlimit *rlim_stack)
{
unsigned long stack_base;
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index b9b3d527bc90..4c7c5df80bd0 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -31,6 +31,7 @@
#include <linux/uaccess.h>
#include <linux/kdebug.h>
#include <linux/kfence.h>
+#include <linux/perf_event.h>
#include <asm/assembly.h>
#include <asm/io.h>
@@ -633,6 +634,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
/* Assist Exception Trap, i.e. floating point exception. */
die_if_kernel("Floating point exception", regs, 0); /* quiet */
__inc_irq_stat(irq_fpassist_count);
+ perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
handle_fpe(regs);
return;
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index 00e97204783e..fb64d9ce0b17 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -13,6 +13,7 @@
#include <linux/uaccess.h>
#include <linux/sysctl.h>
#include <linux/unaligned.h>
+#include <linux/perf_event.h>
#include <asm/hardirq.h>
#include <asm/traps.h>
#include "unaligned.h"
@@ -378,6 +379,7 @@ void handle_unaligned(struct pt_regs *regs)
int ret = ERR_NOTHANDLED;
__inc_irq_stat(irq_unaligned_count);
+ perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, regs->ior);
/* log a message with pacing */
if (user_mode(regs)) {
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index 69d65ffab312..03165c82dfdb 100644
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c
@@ -41,7 +41,6 @@ unsigned long raw_copy_from_user(void *dst, const void __user *src,
mtsp(get_kernel_space(), SR_TEMP2);
/* Check region is user accessible */
- if (start)
while (start < end) {
if (!prober_user(SR_TEMP1, start)) {
newlen = (start - (unsigned long) src);
generated by cgit (git 2.34.1) at 2025-10-11 22:49:08 +0000