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Sean AndersonandAlex Bennée 4f45b2c352 semihosting: Fix GDB File-I/O FLEN 
fstat returns 0 on success and -1 on error. Since we have already
checked for error, ret must be zero. Therefore, any call to fstat on a
non-empty file will return -1/EOVERFLOW.

Restore the original logic that just did a byteswap. I don't really know
what the intention of the fixed commit was.

Fixes: a6300ed6b7 ("semihosting: Split out semihost_sys_flen")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20251027110344.2289945-36-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
 2025-10-29 14:13:40 +00:00
Marc-André LureauandPaolo Bonzini 1b21518f73 char: rename CharBackend->CharFrontend 
The actual backend is "Chardev", CharBackend is the frontend side of
it (whatever talks to the backend), let's rename it for readability.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20251022074612.1258413-1-marcandre.lureau@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2025-10-28 14:49:52 +01:00
Pierrick BouvierandAlex Bennée c9e79557e4 semihosting/arm-compat-semi: compile once in system and per target for user mode 
We don't have any target dependency left in system mode, so we can
compile once.

User mode depends on qemu.h, which is duplicated between linux and bsd,
so we can't easily compile it once.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-13-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-16-alex.bennee@linaro.org>
 2025-09-26 10:07:53 +01:00
Pierrick BouvierandAlex Bennée d3fe754007 semihosting/arm-compat-semi: remove dependency on cpu.h 
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-12-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-15-alex.bennee@linaro.org>
 2025-09-26 10:07:53 +01:00
Pierrick BouvierandAlex Bennée ab385d594c semihosting/arm-compat-semi: eradicate target_long 
We use int64_t or int32_t depending on ret size.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-11-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-14-alex.bennee@linaro.org>
 2025-09-26 10:07:53 +01:00
Pierrick BouvierandAlex Bennée 6dfbf9b6cf semihosting/arm-compat-semi: replace target_ulong 
Replace with vaddr or uint64_t where appropriate.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-10-pierrick.bouvier@linaro.org>
[AJB: tweak commit message]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-13-alex.bennee@linaro.org>
 2025-09-26 10:05:48 +01:00
Pierrick BouvierandAlex Bennée feb49fa79b semihosting/arm-compat-semi: eradicate sizeof(target_ulong) 
No semantic change.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-9-pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-12-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Pierrick BouvierandAlex Bennée 9e65902904 include/semihosting/common-semi: extract common_semi API 
We transform target/{arm,riscv}/common-semi-target.h headers to proper
compilation units, and use them in arm-compat-semi.c.

This way, we can include only the declaration header (which is target
agnostic), and selectively link the appropriate implementation based on
current target.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-8-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-11-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Pierrick BouvierandAlex Bennée a92e151bd0 semihosting/arm-compat-semi: change common_semi_sys_exit_extended 
We now check only is sys_exit is extended.
This allows to break dependency to TARGET_SYS_EXIT_EXTENDED which will
not be available anymore from this code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-5-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-8-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Pierrick BouvierandAlex Bennée d8028d4ede semihosting/guestfd: compile once for system/user 
We move relevant code to semihosting/arm-compat-semi.c, and add
functions to query CONFIG_ARM_COMPATIBLE_SEMIHOSTING at runtime.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-4-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-7-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Pierrick BouvierandAlex Bennée 664172404a semihosting/syscalls: replace uint64_t with vaddr where appropriate 
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-3-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-6-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Pierrick BouvierandAlex Bennée abc4522d01 semihosting/syscalls: compile once in system and per target for user mode 
We replace target_ulong mechanically by uint64_t.
We can't compile (easily) this code once for user, as it relies on
various target/function types, so leave it in specific_ss for user mode.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250822150058.18692-2-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250922093711.2768983-5-alex.bennee@linaro.org>
 2025-09-26 09:55:19 +01:00
Richard Henderson 7adf9ebb0a semihosting: Initialize heap once per process 
While semihosting isn't really thread aware, the current
implementation allocates space for the heap per-thread.

Remove the heap_base and heap_limit fields from TaskState.
Replace with static variables within do_common_semihosting.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-08-28 06:39:25 +10:00
Richard Henderson 05c84cf8df semihosting: Retrieve stack top from image_info 
Remove the write-once field TaskState.stack_base, and use the
same value from struct image_info.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-08-28 06:39:25 +10:00
Philippe Mathieu-DaudéandAlex Bennée b8e6bfd669 semihosting/uaccess: Compile once 
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250526095213.14113-3-philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250627112512.1880708-5-alex.bennee@linaro.org>
 2025-07-02 10:09:48 +01:00
Philippe Mathieu-DaudéandAlex Bennée 328c1a0b86 semihosting/uaccess: Remove uses of target_ulong type 
Replace target_ulong by vaddr or size_t types to match
cpu_memory_rw_debug() prototype in "exec/cpu-common.h":

 >  int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
 >                          void *ptr, size_t len,
 >                          bool is_write);

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250526095213.14113-2-philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250627112512.1880708-4-alex.bennee@linaro.org>
 2025-07-02 10:09:48 +01:00
Philippe Mathieu-DaudéandRichard Henderson 84307cd602 include: Remove 'exec/exec-all.h' 
"exec/exec-all.h" is now fully empty, let's remove it.

Mechanical change running:

  $ sed -i '/exec\/exec-all.h/d' $(git grep -wl exec/exec-all.h)

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250424202412.91612-14-philmd@linaro.org>
 2025-04-30 12:45:05 -07:00
Philippe Mathieu-DaudéandRichard Henderson fe1a3ace13 accel/tcg: Extract probe API out of 'exec/exec-all.h' 
Declare probe methods in "accel/tcg/probe.h" to emphasize
they are specific to TCG accelerator.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250424202412.91612-13-philmd@linaro.org>
 2025-04-30 12:45:05 -07:00
Pierrick BouvierandRichard Henderson 0df783b2fb exec/cpu-all: remove this header 
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250325045915.994760-16-pierrick.bouvier@linaro.org>
 2025-04-23 15:04:57 -07:00
Pierrick BouvierandRichard Henderson 9c2ff9cdc9 exec/cpu-all: remove exec/target_page include 
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-04-23 15:04:57 -07:00
Pierrick BouvierandRichard Henderson 4d43552abe exec/cpu-all: extract tlb flags defines to exec/tlb-flags.h 
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250320223002.2915728-3-pierrick.bouvier@linaro.org>
 2025-04-23 14:08:48 -07:00
Richard Henderson 17a71e8969 semihosting: Assert is_user in user-only semihosting_enabled 
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-04-23 14:08:33 -07:00
Richard Henderson d0b4cfa629 semihosting: Move user-only implementation out-of-line 
Avoid testing CONFIG_USER_ONLY in semihost.h.
The only function that's required is semihosting_enabled.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-04-23 14:08:32 -07:00
Richard Henderson efe25c260c include/exec: Split out accel/tcg/cpu-mmu-index.h 
The implementation of cpu_mmu_index was split between cpu-common.h
and cpu-all.h, depending on CONFIG_USER_ONLY.  We already have the
plumbing common to user and system mode.  Using MMU_USER_IDX
requires the cpu.h for a specific target, and so is restricted to
when we're compiling per-target.

Include the new header only where needed.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2025-04-23 14:08:17 -07:00
Philippe Mathieu-DaudéandAlex Bennée bb0c5be8e9 semihosting/meson: Build config.o and console.o once 
config.c and console.c don't use any target specific
headers anymore, move them from specific_ss[] to
system_ss[] so they are built once, but will also be
linked once, removing global symbol clash in a single
QEMU binary.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250103171037.11265-6-philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250116160306.1709518-8-alex.bennee@linaro.org>
 2025-01-17 10:44:03 +00:00