process_vm_readv

transfer data between process address spaces

sys_process_vm_readv(pid_t pid, const struct iovec *lvec, unsigned long liovcnt, const struct iovec *rvec, unsigned long riovcnt, unsigned long flags)

number	330 (0x14a)
abi	common
entry point	`sys_process_vm_readv`
since	Linux 5.0
man page	process_vm_readv(2)
source	elixir.bootlin.com

Registers

register	value
`r20`	330, the syscall number
`r26`	pid_t pid
`r25`	const struct iovec *lvec
`r24`	unsigned long liovcnt
`r23`	const struct iovec *rvec
`r22`	unsigned long riovcnt
`r21`	unsigned long flags
`r28`	the return value

Then run ble 0x100(%sr2, %r0) to enter the kernel.

Same syscall on other architectures

x64 310
x86 347
arm64 270
arm 376
riscv64 270
x32 1073742363
loongarch64 270
ppc64 351
ppc 351
s390x 340
mips64 5304
mipsn32 6309
mipso32 4345
alpha 504
arc 270
csky 270
hexagon 270
m68k 345
microblaze 377
nios2 270
openrisc 270
sh 365
sparc 338
sparc64 338
xtensa 322

Get this as JSON: https://api.syscall.sh/v2/syscalls/parisc/process_vm_readv