Merge tag 'pull-lu-20250828' of https://gitlab.com/rth7680/qemu into staging

linux-user: do not print IP socket options by default
linux-user: Add strace for rseq
linux-user: Move get_elf_cpu_model to target/elfload.c
linux-user: Move get_elf_hwcap to target/elfload.c
linux-user: Move get_elf_hwcap2 to target/elfload.c
linux-user: Move get_elf_platform to target/elfload.c
linux-user: Move get_elf_base_platform to target/elfload.c
linux-user: Create init_main_thread in target/cpu_loop.c
semihosting: Retrieve stack top from image_info
semihosting: Initialize heap once per process

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* tag 'pull-lu-20250828' of https://gitlab.com/rth7680/qemu: (46 commits)
  linux-user: do not print IP socket options by default
  linux-user: Add strace for rseq
  linux-user: Remove do_init_main_thread
  linux-user/hexagon: Create init_main_thread
  linux-user/xtensa: Create init_main_thread
  linux-user/hppa: Create init_main_thread
  linux-user/riscv: Create init_main_thread
  linux-user/s390x: Create init_main_thread
  linux-user/alpha: Create init_main_thread
  linux-user/m68k: Create init_main_thread
  linux-user/sh4: Create init_main_thread
  linux-user/openrisc: Create init_main_thread
  linux-user/microblaze: Create init_main_thread
  linux-user/mips: Create init_main_thread
  linux-user/loongarch64: Create init_main_thread
  linux-user/ppc: Create init_main_thread
  linux-user/sparc: Create init_main_thread
  linux-user/aarch64: Create init_main_thread
  linux-user/arm: Remove a.out startup remenents
  linux-user/arm: Create init_main_thread
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>