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2021-01-13tcg/tci: Add special tci_movi_{i32,i64} opcodesRichard Henderson1-2/+2
The normal movi opcodes are going away. We need something for TCI to use internally. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-07tcg/tci: Push const down through bytecode readingRichard Henderson1-26/+34
Reviewed-by: Joelle van Dyne <j@getutm.app> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-07tcg: Introduce tcg_splitwx_to_{rx,rw}Richard Henderson1-2/+4
Add two helper functions, using a global variable to hold the displacement. The displacement is currently always 0, so no change in behaviour. Begin using the functions in tcg common code only. Reviewed-by: Joelle van Dyne <j@getutm.app> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-07tcg: Move tcg prologue pointer out of TCGContextRichard Henderson1-2/+2
This value is constant across all thread-local copies of TCGContext, so we might as well move it out of thread-local storage. Use the correct function pointer type, and name the variable tcg_qemu_tb_exec, which means that we are able to remove the macro that does the casting. Replace HAVE_TCG_QEMU_TB_EXEC with CONFIG_TCG_INTERPRETER, as this is somewhat clearer in intent. Reviewed-by: Joelle van Dyne <j@getutm.app> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-02cfi: Initial support for cfi-icall in QEMUDaniele Buono1-0/+7
LLVM/Clang, supports runtime checks for forward-edge Control-Flow Integrity (CFI). CFI on indirect function calls (cfi-icall) ensures that, in indirect function calls, the function called is of the right signature for the pointer type defined at compile time. For this check to work, the code must always respect the function signature when using function pointer, the function must be defined at compile time, and be compiled with link-time optimization. This rules out, for example, shared libraries that are dynamically loaded (given that functions are not known at compile time), and code that is dynamically generated at run-time. This patch: 1) Introduces the CONFIG_CFI flag to support cfi in QEMU 2) Introduces a decorator to allow the definition of "sensitive" functions, where a non-instrumented function may be called at runtime through a pointer. The decorator will take care of disabling cfi-icall checks on such functions, when cfi is enabled. 3) Marks functions currently in QEMU that exhibit such behavior, in particular: - The function in TCG that calls pre-compiled TBs - The function in TCI that interprets instructions - Functions in the plugin infrastructures that jump to callbacks - Functions in util that directly call a signal handler Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com> Acked-by: Alex Bennée <alex.bennee@linaro.org Message-Id: <20201204230615.2392-3-dbuono@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-09-23qemu/atomic.h: rename atomic_ to qatomic_Stefan Hajnoczi1-1/+1
clang's C11 atomic_fetch_*() functions only take a C11 atomic type pointer argument. QEMU uses direct types (int, etc) and this causes a compiler error when a QEMU code calls these functions in a source file that also included <stdatomic.h> via a system header file: $ CC=clang CXX=clang++ ./configure ... && make ../util/async.c:79:17: error: address argument to atomic operation must be a pointer to _Atomic type ('unsigned int *' invalid) Avoid using atomic_*() names in QEMU's atomic.h since that namespace is used by <stdatomic.h>. Prefix QEMU's APIs with 'q' so that atomic.h and <stdatomic.h> can co-exist. I checked /usr/include on my machine and searched GitHub for existing "qatomic_" users but there seem to be none. This patch was generated using: $ git grep -h -o '\<atomic\(64\)\?_[a-z0-9_]\+' include/qemu/atomic.h | \ sort -u >/tmp/changed_identifiers $ for identifier in $(</tmp/changed_identifiers); do sed -i "s%\<$identifier\>%q$identifier%g" \ $(git grep -I -l "\<$identifier\>") done I manually fixed line-wrap issues and misaligned rST tables. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200923105646.47864-1-stefanha@redhat.com>
2020-01-15tcg: Search includes from the project root source directoryPhilippe Mathieu-Daudé1-1/+1
We currently search both the root and the tcg/ directories for tcg files: $ git grep '#include "tcg/' | wc -l 28 $ git grep '#include "tcg[^/]' | wc -l 94 To simplify the preprocessor search path, unify by expliciting the tcg/ directory. Patch created mechanically by running: $ for x in \ tcg.h tcg-mo.h tcg-op.h tcg-opc.h \ tcg-op-gvec.h tcg-gvec-desc.h; do \ sed -i "s,#include \"$x\",#include \"tcg/$x\"," \ $(git grep -l "#include \"$x\""); \ done Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts) Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200101112303.20724-2-philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-10-28tci: Add implementation for INDEX_op_ld16u_i64Stefan Weil1-0/+15
This fixes "make check-tcg" on a Debian x86_64 host. Signed-off-by: Stefan Weil <sw@weilnetz.de> Tested-by: Thomas Huth <thuth@redhat.com> Message-Id: <20190410194838.10123-1-sw@weilnetz.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-12-29tcg: Allow 6 arguments to TCG helpersRichard Henderson1-4/+8
We already handle this in the backends, and the lifetime datum for the TCGOp is already large enough. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-10-10tci: move tci_regs to tcg_qemu_tb_exec's stackEmilio G. Cota1-273/+279
Groundwork for supporting multiple TCG contexts. Compile-tested for all targets on an x86_64 host. Suggested-by: Richard Henderson <rth@twiddle.net> Acked-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-07-19tcg/tci: enable bswap16_i64Philippe Mathieu-Daudé1-1/+0
Altough correctly implemented, bswap16_i64() never got tested/executed so the safety TODO() statement was never removed. Since it got now tested the TODO() can be removed. while running Alex Bennée's image aarch64-linux-3.15rc2-buildroot.img: Trace 0x7fa1904b0890 [0: ffffffc00036cd04] ---------------- IN: 0xffffffc00036cd24: 5ac00694 rev16 w20, w20 OP: ---- ffffffc00036cd24 0000000000000000 0000000000000000 ext32u_i64 tmp3,x20 ext16u_i64 tmp2,tmp3 bswap16_i64 x20,tmp2 movi_i64 tmp4,$0x10 shr_i64 tmp2,tmp3,tmp4 ext16u_i64 tmp2,tmp2 bswap16_i64 tmp2,tmp2 deposit_i64 x20,x20,tmp2,$0x10,$0x10 Linking TBs 0x7fa1904b0890 [ffffffc00036cd04] index 0 -> 0x7fa1904b0aa0 [ffffffc00036cd24] Trace 0x7fa1904b0aa0 [0: ffffffc00036cd24] TODO qemu/tci.c:1049: tcg_qemu_tb_exec() qemu/tci.c:1049: tcg fatal error Aborted Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jaroslaw Pelczar <j.pelczar@samsung.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Message-Id: <20170718045540.16322-11-f4bug@amsat.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-06-15tcg: move tcg backend files into accel/tcg/Yang Zhong1-0/+1251
move tcg-runtime.c, translate-all.(ch) and translate-common.c into accel/tcg/ subdirectory and updated related trace-events file. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1496383606-18060-4-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
generated by cgit v1.1 at 2025-01-28 13:39:37 +0000