From: Richard Henderson <rth@twiddle.net>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: "Alex Bennée" <alex.bennee@linaro.org>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Aurelien Jarno" <aurelien@aurel32.net>
Subject: Re: [Qemu-devel] [PATCH v3 23/25] tcg: Emit prologue to the beginning of code_gen_buffer
Date: Wed, 23 Sep 2015 12:39:45 -0700 [thread overview]
Message-ID: <56030001.2000909@twiddle.net> (raw)
In-Reply-To: <CAFEAcA-jcS8rDAN6xgHV+obG1dDdT9iW_vSwyK-4kbJE8OopFg@mail.gmail.com>
On 09/23/2015 12:28 PM, Peter Maydell wrote:
>> - /* Steal room for the prologue at the end of the buffer. This ensures
>> - (via the MAX_CODE_GEN_BUFFER_SIZE limits above) that direct branches
>> - from TB's to the prologue are going to be in range. It also means
>> - that we don't need to mark (additional) portions of the data segment
>> - as executable. */
>
> I take it we don't have any annoying targets with branch-forwards
> ranges larger than their branch-backwards ranges...
No, thankfully.
r~
next prev parent reply other threads:[~2015-09-23 19:39 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-22 20:24 [Qemu-devel] [PATCH v3 00/25] Do away with TB retranslation Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 01/25] tcg: Rename debug_insn_start to insn_start Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 02/25] target-*: Unconditionally emit tcg_gen_insn_start Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 03/25] target-*: Increment num_insns immediately after tcg_gen_insn_start Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 04/25] target-*: Introduce and use cpu_breakpoint_test Richard Henderson
2015-09-23 19:19 ` Peter Maydell
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 05/25] tcg: Allow extra data to be attached to insn_start Richard Henderson
2015-09-23 14:55 ` Kevin O'Connor
2015-09-23 16:37 ` Richard Henderson
2015-09-23 16:38 ` Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 06/25] target-arm: Add condexec state " Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 07/25] target-i386: Add cc_op " Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 08/25] target-mips: Add delayed branch " Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 09/25] target-s390x: Add cc_op " Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 10/25] target-sh4: Add flags " Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 11/25] target-cris: Mirror gen_opc_pc into insn_start Richard Henderson
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 12/25] target-sparc: Tidy gen_branch_a interface Richard Henderson
2015-09-22 21:23 ` Aurelien Jarno
2015-09-24 19:42 ` Aurelien Jarno
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 13/25] target-sparc: Split out gen_branch_n Richard Henderson
2015-09-24 19:42 ` Aurelien Jarno
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 14/25] target-sparc: Remove gen_opc_jump_pc Richard Henderson
2015-09-24 19:42 ` Aurelien Jarno
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 15/25] target-sparc: Add npc state to insn_start Richard Henderson
2015-09-24 19:42 ` Aurelien Jarno
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 16/25] tcg: Merge cpu_gen_code into tb_gen_code Richard Henderson
2015-09-24 19:48 ` Aurelien Jarno
2015-09-22 20:24 ` [Qemu-devel] [PATCH v3 17/25] target-*: Drop cpu_gen_code define Richard Henderson
2015-09-24 19:49 ` Aurelien Jarno
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 18/25] tcg: Add TCG_MAX_INSNS Richard Henderson
2015-09-24 20:02 ` Aurelien Jarno
2015-09-24 20:43 ` Richard Henderson
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 19/25] tcg: Pass data argument to restore_state_to_opc Richard Henderson
2015-09-24 20:11 ` Aurelien Jarno
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 20/25] tcg: Save insn data and use it in cpu_restore_state_from_tb Richard Henderson
2015-09-23 19:20 ` Peter Maydell
2015-09-25 21:10 ` Aurelien Jarno
2015-09-25 23:05 ` Richard Henderson
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 21/25] tcg: Remove gen_intermediate_code_pc Richard Henderson
2015-09-25 21:11 ` Aurelien Jarno
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 22/25] tcg: Remove tcg_gen_code_search_pc Richard Henderson
2015-09-25 21:11 ` Aurelien Jarno
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 23/25] tcg: Emit prologue to the beginning of code_gen_buffer Richard Henderson
2015-09-23 19:28 ` Peter Maydell
2015-09-23 19:39 ` Richard Henderson [this message]
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 24/25] tcg: Allocate a guard page after code_gen_buffer Richard Henderson
2015-09-23 19:39 ` Peter Maydell
2015-09-23 20:00 ` Richard Henderson
2015-09-23 20:37 ` Peter Maydell
2015-09-23 22:12 ` Richard Henderson
2015-09-22 20:25 ` [Qemu-devel] [PATCH v3 25/25] tcg: Check for overflow via highwater mark Richard Henderson
2015-09-23 19:42 ` Peter Maydell
2015-09-23 20:01 ` Richard Henderson
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