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qemu/linux-user
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Akshit Yadav dd0ee6af65 linux-user: Fix AT_PHDR when program headers are relocated into their own segment 
When a binary is patched or relocated such that the program header table is
moved into a separate PT_LOAD segment (rather than sitting at the start of the
first loadable segment), QEMU's AT_PHDR auxv entry becomes incorrect. The
loader was computing AT_PHDR as load_addr + e_phoff, which assumes the headers
are mapped 1:1 from file offset 0. This breaks when the headers are elsewhere.

The Linux kernel instead locates the PT_LOAD segment that contains e_phoff,
then computes the in-memory address as p_vaddr + (e_phoff - p_offset). This
correctly handles relocated headers.

Fix by:
1. Add phdr_addr field to image_info to cache the resolved address.
2. Initialize to load_addr + e_phoff (fallback for headers outside any PT_LOAD).
3. In the PT_LOAD mapping loop, detect if the segment contains e_phoff and
   override with the segment-relative address.
4. Use info->phdr_addr for AT_PHDR instead of the incorrect formula.

Signed-off-by: Akshit Yadav <valium7171@gmail.com>
Reviewed-by: Helge Deller <deller@gmx.de>
(cherry picked from commit 156e536a7b)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2026-06-24 16:35:22 +03:00
..
aarch64 linux-user/aarch64/target_fcntl.h: add missing TARGET_O_LARGEFILE definition 2026-01-21 10:23:05 +03:00
alpha linux-user: Define SO_TIMESTAMP*_NEW and SO_RCVTIMEIO_NEW 2026-05-14 22:28:26 +03:00
arm linux-user/arm/nwfpe: Use thread-local storage for qemufpa 2026-05-14 22:28:26 +03:00
generic linux-user: Define SO_TIMESTAMP*_NEW and SO_RCVTIMEIO_NEW 2026-05-14 22:28:26 +03:00
hexagon linux-user/hexagon: Use an array for GPRs 2025-10-17 13:45:46 -07:00
hppa linux-user: Define SO_TIMESTAMP*_NEW and SO_RCVTIMEIO_NEW 2026-05-14 22:28:26 +03:00
i386 linux-user/i386/signal.c: Correct definition of target_fpstate_32 2026-03-31 20:10:04 +03:00
include linux-user: cleanup unused linux-user/include/host directories 2023-08-08 20:44:08 +02:00
loongarch64 linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
m68k bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
microblaze linux-user/microblaze: Fix little-endianness binary 2025-10-16 17:07:52 +02:00
mips linux-user/mips: save/restore FCSR across signal delivery 2026-06-01 20:22:37 +03:00
mips64 linux-user/mips64: fix mipsn32 elf_core_copy_regs entry width 2026-05-26 18:28:47 +03:00
openrisc bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
ppc linux-user/ppc: restore fp_status from FPSCR on sigreturn 2026-06-01 20:22:14 +03:00
riscv linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
s390x linux-user/s390x: restore fpu_status rounding mode from FPC on sigreturn 2026-06-01 20:27:32 +03:00
sh4 linux-user/sh4: restore FP rounding mode on sigreturn 2026-06-01 20:25:10 +03:00
sparc linux-user: Define SO_TIMESTAMP*_NEW and SO_RCVTIMEIO_NEW 2026-05-14 22:28:26 +03:00
x86_64 accel/tcg: Add clear_flags argument to page_set_flags 2025-10-14 07:30:39 -07:00
xtensa linux-user/xtensa: fix unlock of uninitialized frame pointer on sigreturn 2026-06-24 16:35:22 +03:00
elfload.c linux-user: Fix AT_PHDR when program headers are relocated into their own segment 2026-06-24 16:35:22 +03:00
errnos.c.inc linux-user: Simplify host <-> target errno conversion using macros 2021-07-12 21:53:35 +02:00
exit.c accel/tcg: Move perf and debuginfo support to tcg/ 2024-01-29 21:04:10 +10:00
fd-trans.c linux-user: fix off-by-one in host_to_target_for_each_rtattr() 2026-05-14 22:28:26 +03:00
fd-trans.h linux-user: Hold the fd-trans lock across fork 2025-07-10 13:49:03 -06:00
flat.h linux-user/flatload.c: Remove unused bFLT shared-library and ZFLAT code 2024-04-25 10:21:06 +01:00
flatload.c include/exec: Split out mmap-lock.h 2025-04-23 14:08:17 -07:00
gen-vdso-elfn.c.inc linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
gen-vdso.c linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
ioctls.h linux-user: Add missing CDROM ioctls 2026-05-14 22:28:26 +03:00
linux_loop.h linux-user: implement more loop ioctls 2021-11-29 14:54:17 +01:00
linuxload.c linux-user: Create do_init_main_thread 2025-08-28 06:39:25 +10:00
loader.h linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
main.c linux-user: Fix AT_EXECFN in AUXV for symlinked programs 2026-05-19 23:53:28 +03:00
meson.build plugins: fix inclusion of user-mode APIs 2025-07-14 11:42:49 +01:00
mmap.c linux-user: fix mremap with old_size=0 for shared mappings 2026-03-18 08:05:36 +03:00
plugin-api.c plugins: fix inclusion of user-mode APIs 2025-07-14 11:42:49 +01:00
qemu.h linux-user: Fix AT_PHDR when program headers are relocated into their own segment 2026-06-24 16:35:22 +03:00
semihost.c semihosting: Remove qemu_semihosting_console_outs 2022-06-28 04:41:20 +05:30
signal-common.h linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
signal.c bsd-user, linux-user: signal: recursive signal delivery fix 2026-05-14 22:28:26 +03:00
socket.h Supply missing header guards 2019-06-12 13:20:21 +02:00
strace.c linux-user/strace: add fsmount series of syscalls 2026-06-11 23:29:20 +03:00
strace.h linux-user: Have do_syscall() use CPUArchState* instead of void* 2022-05-23 22:47:19 +02:00
strace.list linux-user/strace: add fsmount series of syscalls 2026-06-11 23:29:20 +03:00
syscall.c linux-user: add preadv2/preadv2 2026-06-14 08:53:07 +03:00
syscall_defs.h linux-user: Use abi_int for imr_ifindex in ip_mreqn struct 2026-05-14 22:28:26 +03:00
syscall_types.h linux-user: Add termios2 support 2026-01-24 23:47:45 +03:00
thunk.c user: Move 'thunk.h' from 'exec/user' to 'user' 2024-05-03 17:21:20 +02:00
trace-events linux-user: Rename user_force_sig tracepoint to match function name 2022-01-18 12:41:42 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
uaccess.c meson: Make DEBUG_REMAP a meson option 2024-04-24 15:46:00 -07:00
uname.c linux-user: Remove pointless CPU{ARCH}State casts 2022-05-23 22:47:20 +02:00
uname.h linux-user: Have do_syscall() use CPUArchState* instead of void* 2022-05-23 22:47:19 +02:00
user-internals.h linux-user: Fix AT_EXECFN in AUXV for symlinked programs 2026-05-19 23:53:28 +03:00
user-mmap.h user: Extract common MMAP API to 'user/mmap.h' 2025-03-09 14:54:32 +01:00
vm86.c linux-user/vm86: Fix compilation with Clang 2024-10-13 10:34:00 -07:00