更新breakpad代码
Matthew
2 years ago
parent
56253ff351
commit
4a69a8c967
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// Copyright 2012 Google LLC
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google LLC nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// A minimalistic implementation of getcontext() to be used by
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// Google Breakpad when getcontext() is not available in libc.
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#include "common/linux/ucontext_constants.h"
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/* int getcontext (ucontext_t* ucp) */
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#if defined(__arm__)
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.text
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.global breakpad_getcontext
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.hidden breakpad_getcontext
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.type breakpad_getcontext, #function
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.align 0
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.fnstart
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breakpad_getcontext:
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/* First, save r4-r11 */
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add r1, r0, #(MCONTEXT_GREGS_OFFSET + 4*4)
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stm r1, {r4-r11}
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/* r12 is a scratch register, don't save it */
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/* Save sp and lr explicitly. */
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/* - sp can't be stored with stmia in Thumb-2 */
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/* - STM instructions that store sp and pc are deprecated in ARM */
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str sp, [r0, #(MCONTEXT_GREGS_OFFSET + 13*4)]
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str lr, [r0, #(MCONTEXT_GREGS_OFFSET + 14*4)]
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/* Save the caller's address in 'pc' */
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str lr, [r0, #(MCONTEXT_GREGS_OFFSET + 15*4)]
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/* Save ucontext_t* pointer across next call */
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mov r4, r0
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/* Call sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
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mov r0, #0 /* SIG_BLOCK */
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mov r1, #0 /* NULL */
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add r2, r4, #UCONTEXT_SIGMASK_OFFSET
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bl sigprocmask(PLT)
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/* Intentionally do not save the FPU state here. This is because on
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* Linux/ARM, one should instead use ptrace(PTRACE_GETFPREGS) or
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* ptrace(PTRACE_GETVFPREGS) to get it.
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*
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* Note that a real implementation of getcontext() would need to save
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* this here to allow setcontext()/swapcontext() to work correctly.
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*/
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/* Restore the values of r4 and lr */
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mov r0, r4
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ldr lr, [r0, #(MCONTEXT_GREGS_OFFSET + 14*4)]
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ldr r4, [r0, #(MCONTEXT_GREGS_OFFSET + 4*4)]
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/* Return 0 */
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mov r0, #0
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bx lr
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.fnend
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.size breakpad_getcontext, . - breakpad_getcontext
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#elif defined(__aarch64__)
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#if defined(__ARM_FEATURE_PAC_DEFAULT) && __ARM_FEATURE_PAC_DEFAULT
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// ENABLE_PAUTH must be defined to 1 since this value will be used in
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// bitwise-shift later!
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#define ENABLE_PAUTH 1
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#if ((__ARM_FEATURE_PAC_DEFAULT&((1<<0)|(1<<1)))==0)
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#error Pointer authentication defines no valid key!
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#endif
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#else
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#define ENABLE_PAUTH 0
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#endif
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#if defined(__ARM_FEATURE_BTI_DEFAULT) && (__ARM_FEATURE_BTI_DEFAULT==1)
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// ENABLE_BTI must be defined to 1 since this value will be used in
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// bitwise-shift later!
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#define ENABLE_BTI 1
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#else
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#define ENABLE_BTI 0
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#endif
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// Although Pointer Authentication and Branch Target Instructions are technically
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// seperate features they work together, i.e. the paciasp and pacibsp instructions
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// serve as BTI landing pads.
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// Therefore PA-instructions are enabled when PA _or_ BTI is enabled!
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#if ENABLE_PAUTH || ENABLE_BTI
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// See section "Pointer Authentication" of
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// https://developer.arm.com/documentation/101028/0012/5--Feature-test-macros
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// for details how to interpret __ARM_FEATURE_PAC_DEFAULT
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#if (__ARM_FEATURE_PAC_DEFAULT & (1<<0))
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#define PAUTH_SIGN_SP paciasp
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#define PAUTH_AUTH_SP autiasp
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#else
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#define PAUTH_SIGN_SP pacibsp
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#define PAUTH_AUTH_SP autibsp
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#endif
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#else
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#define PAUTH_SIGN_SP
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#define PAUTH_AUTH_SP
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#endif
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#define _NSIG 64
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#define __NR_rt_sigprocmask 135
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.text
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.global breakpad_getcontext
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.hidden breakpad_getcontext
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.type breakpad_getcontext, #function
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.align 4
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.cfi_startproc
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breakpad_getcontext:
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PAUTH_SIGN_SP
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/* The saved context will return to the getcontext() call point
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with a return value of 0 */
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str xzr, [x0, MCONTEXT_GREGS_OFFSET + 0 * REGISTER_SIZE]
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stp x18, x19, [x0, MCONTEXT_GREGS_OFFSET + 18 * REGISTER_SIZE]
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stp x20, x21, [x0, MCONTEXT_GREGS_OFFSET + 20 * REGISTER_SIZE]
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stp x22, x23, [x0, MCONTEXT_GREGS_OFFSET + 22 * REGISTER_SIZE]
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stp x24, x25, [x0, MCONTEXT_GREGS_OFFSET + 24 * REGISTER_SIZE]
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stp x26, x27, [x0, MCONTEXT_GREGS_OFFSET + 26 * REGISTER_SIZE]
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stp x28, x29, [x0, MCONTEXT_GREGS_OFFSET + 28 * REGISTER_SIZE]
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str x30, [x0, MCONTEXT_GREGS_OFFSET + 30 * REGISTER_SIZE]
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/* Place LR into the saved PC, this will ensure that when
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switching to this saved context with setcontext() control
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will pass back to the caller of getcontext(), we have
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already arranged to return the appropriate return value in x0
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above. */
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str x30, [x0, MCONTEXT_PC_OFFSET]
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/* Save the current SP */
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mov x2, sp
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str x2, [x0, MCONTEXT_SP_OFFSET]
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/* Initialize the pstate. */
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str xzr, [x0, MCONTEXT_PSTATE_OFFSET]
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/* Figure out where to place the first context extension
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block. */
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add x2, x0, #MCONTEXT_EXTENSION_OFFSET
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/* Write the context extension fpsimd header. */
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mov w3, #(FPSIMD_MAGIC & 0xffff)
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movk w3, #(FPSIMD_MAGIC >> 16), lsl #16
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str w3, [x2, #FPSIMD_CONTEXT_MAGIC_OFFSET]
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mov w3, #FPSIMD_CONTEXT_SIZE
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str w3, [x2, #FPSIMD_CONTEXT_SIZE_OFFSET]
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/* Fill in the FP SIMD context. */
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add x3, x2, #(FPSIMD_CONTEXT_VREGS_OFFSET + 8 * SIMD_REGISTER_SIZE)
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stp d8, d9, [x3], #(2 * SIMD_REGISTER_SIZE)
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stp d10, d11, [x3], #(2 * SIMD_REGISTER_SIZE)
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stp d12, d13, [x3], #(2 * SIMD_REGISTER_SIZE)
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stp d14, d15, [x3], #(2 * SIMD_REGISTER_SIZE)
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add x3, x2, FPSIMD_CONTEXT_FPSR_OFFSET
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mrs x4, fpsr
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str w4, [x3]
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mrs x4, fpcr
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str w4, [x3, FPSIMD_CONTEXT_FPCR_OFFSET - FPSIMD_CONTEXT_FPSR_OFFSET]
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/* Write the termination context extension header. */
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add x2, x2, #FPSIMD_CONTEXT_SIZE
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str xzr, [x2, #FPSIMD_CONTEXT_MAGIC_OFFSET]
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str xzr, [x2, #FPSIMD_CONTEXT_SIZE_OFFSET]
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/* Grab the signal mask */
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/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
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add x2, x0, #UCONTEXT_SIGMASK_OFFSET
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mov x0, #0 /* SIG_BLOCK */
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mov x1, #0 /* NULL */
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mov x3, #(_NSIG / 8)
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mov x8, #__NR_rt_sigprocmask
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svc 0
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/* Return x0 for success */
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mov x0, 0
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PAUTH_AUTH_SP
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ret
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.cfi_endproc
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.size breakpad_getcontext, . - breakpad_getcontext
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#elif defined(__i386__)
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.text
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.global breakpad_getcontext
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.hidden breakpad_getcontext
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.align 4
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.type breakpad_getcontext, @function
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breakpad_getcontext:
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movl 4(%esp), %eax /* eax = uc */
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/* Save register values */
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movl %ecx, MCONTEXT_ECX_OFFSET(%eax)
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movl %edx, MCONTEXT_EDX_OFFSET(%eax)
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movl %ebx, MCONTEXT_EBX_OFFSET(%eax)
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movl %edi, MCONTEXT_EDI_OFFSET(%eax)
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movl %esi, MCONTEXT_ESI_OFFSET(%eax)
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movl %ebp, MCONTEXT_EBP_OFFSET(%eax)
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movl (%esp), %edx /* return address */
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lea 4(%esp), %ecx /* exclude return address from stack */
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mov %edx, MCONTEXT_EIP_OFFSET(%eax)
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mov %ecx, MCONTEXT_ESP_OFFSET(%eax)
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xorl %ecx, %ecx
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movw %fs, %cx
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mov %ecx, MCONTEXT_FS_OFFSET(%eax)
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movl $0, MCONTEXT_EAX_OFFSET(%eax)
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/* Save floating point state to fpregstate, then update
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* the fpregs pointer to point to it */
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leal UCONTEXT_FPREGS_MEM_OFFSET(%eax), %ecx
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fnstenv (%ecx)
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fldenv (%ecx)
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mov %ecx, UCONTEXT_FPREGS_OFFSET(%eax)
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/* Save signal mask: sigprocmask(SIGBLOCK, NULL, &uc->uc_sigmask) */
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leal UCONTEXT_SIGMASK_OFFSET(%eax), %edx
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xorl %ecx, %ecx
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push %edx /* &uc->uc_sigmask */
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push %ecx /* NULL */
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push %ecx /* SIGBLOCK == 0 on i386 */
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call sigprocmask@PLT
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addl $12, %esp
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movl $0, %eax
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ret
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.size breakpad_getcontext, . - breakpad_getcontext
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#elif defined(__mips__)
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// This implementation is inspired by implementation of getcontext in glibc.
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#include <asm-mips/asm.h>
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#include <asm-mips/regdef.h>
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#if _MIPS_SIM == _ABIO32
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#include <asm-mips/fpregdef.h>
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#endif
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// from asm-mips/asm.h
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#if _MIPS_SIM == _ABIO32
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#define ALSZ 7
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#define ALMASK ~7
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#define SZREG 4
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#else // _MIPS_SIM != _ABIO32
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#define ALSZ 15
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#define ALMASK ~15
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#define SZREG 8
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#endif
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#include <asm/unistd.h> // for __NR_rt_sigprocmask
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#define _NSIG8 128 / 8
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#define SIG_BLOCK 1
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.text
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LOCALS_NUM = 1 // save gp on stack
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FRAME_SIZE = ((LOCALS_NUM * SZREG) + ALSZ) & ALMASK
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GP_FRAME_OFFSET = FRAME_SIZE - (1 * SZREG)
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MCONTEXT_REG_SIZE = 8
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#if _MIPS_SIM == _ABIO32
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NESTED (breakpad_getcontext, FRAME_SIZE, ra)
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.mask 0x00000000, 0
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.fmask 0x00000000, 0
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.set noreorder
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.cpload t9
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.set reorder
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move a2, sp
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#define _SP a2
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addiu sp, -FRAME_SIZE
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.cprestore GP_FRAME_OFFSET
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sw s0, (16 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s1, (17 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s2, (18 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s3, (19 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s4, (20 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s5, (21 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s6, (22 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw s7, (23 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw _SP, (29 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw fp, (30 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw ra, (31 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
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sw ra, MCONTEXT_PC_OFFSET(a0)
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#ifdef __mips_hard_float
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s.d fs0, (20 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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s.d fs1, (22 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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s.d fs2, (24 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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s.d fs3, (26 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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s.d fs4, (28 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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s.d fs5, (30 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
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cfc1 v1, fcr31
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sw v1, MCONTEXT_FPC_CSR(a0)
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#endif // __mips_hard_float
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/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
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li a3, _NSIG8
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addu a2, a0, UCONTEXT_SIGMASK_OFFSET
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move a1, zero
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li a0, SIG_BLOCK
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li v0, __NR_rt_sigprocmask
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syscall
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|
addiu sp, FRAME_SIZE
|
||||||
|
jr ra
|
||||||
|
|
||||||
|
END (breakpad_getcontext)
|
||||||
|
#else
|
||||||
|
|
||||||
|
#ifndef NESTED
|
||||||
|
/*
|
||||||
|
* NESTED - declare nested routine entry point
|
||||||
|
*/
|
||||||
|
#define NESTED(symbol, framesize, rpc) \
|
||||||
|
.globl symbol; \
|
||||||
|
.align 2; \
|
||||||
|
.type symbol,@function; \
|
||||||
|
.ent symbol,0; \
|
||||||
|
symbol: .frame sp, framesize, rpc;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* END - mark end of function
|
||||||
|
*/
|
||||||
|
#ifndef END
|
||||||
|
# define END(function) \
|
||||||
|
.end function; \
|
||||||
|
.size function,.-function
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* int getcontext (ucontext_t* ucp) */
|
||||||
|
|
||||||
|
NESTED (breakpad_getcontext, FRAME_SIZE, ra)
|
||||||
|
.mask 0x10000000, 0
|
||||||
|
.fmask 0x00000000, 0
|
||||||
|
|
||||||
|
move a2, sp
|
||||||
|
#define _SP a2
|
||||||
|
move a3, gp
|
||||||
|
#define _GP a3
|
||||||
|
|
||||||
|
daddiu sp, -FRAME_SIZE
|
||||||
|
.cpsetup $25, GP_FRAME_OFFSET, breakpad_getcontext
|
||||||
|
|
||||||
|
/* Store a magic flag. */
|
||||||
|
li v1, 1
|
||||||
|
sd v1, (0 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0) /* zero */
|
||||||
|
|
||||||
|
sd s0, (16 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s1, (17 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s2, (18 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s3, (19 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s4, (20 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s5, (21 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s6, (22 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s7, (23 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd _GP, (28 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd _SP, (29 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd s8, (30 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd ra, (31 * MCONTEXT_REG_SIZE + MCONTEXT_GREGS_OFFSET)(a0)
|
||||||
|
sd ra, MCONTEXT_PC_OFFSET(a0)
|
||||||
|
|
||||||
|
#ifdef __mips_hard_float
|
||||||
|
s.d $f24, (24 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f25, (25 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f26, (26 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f27, (27 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f28, (28 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f29, (29 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f30, (30 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
s.d $f31, (31 * MCONTEXT_REG_SIZE + MCONTEXT_FPREGS_OFFSET)(a0)
|
||||||
|
|
||||||
|
cfc1 v1, $31
|
||||||
|
sw v1, MCONTEXT_FPC_CSR(a0)
|
||||||
|
#endif /* __mips_hard_float */
|
||||||
|
|
||||||
|
/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
|
||||||
|
li a3, _NSIG8
|
||||||
|
daddu a2, a0, UCONTEXT_SIGMASK_OFFSET
|
||||||
|
move a1, zero
|
||||||
|
li a0, SIG_BLOCK
|
||||||
|
|
||||||
|
li v0, __NR_rt_sigprocmask
|
||||||
|
syscall
|
||||||
|
|
||||||
|
.cpreturn
|
||||||
|
daddiu sp, FRAME_SIZE
|
||||||
|
move v0, zero
|
||||||
|
jr ra
|
||||||
|
|
||||||
|
END (breakpad_getcontext)
|
||||||
|
#endif // _MIPS_SIM == _ABIO32
|
||||||
|
|
||||||
|
#elif defined(__x86_64__)
|
||||||
|
/* The x64 implementation of breakpad_getcontext was derived in part
|
||||||
|
from the implementation of libunwind which requires the following
|
||||||
|
notice. */
|
||||||
|
/* libunwind - a platform-independent unwind library
|
||||||
|
Copyright (C) 2008 Google, Inc
|
||||||
|
Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
|
||||||
|
Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
|
||||||
|
|
||||||
|
This file is part of libunwind.
|
||||||
|
|
||||||
|
Permission is hereby granted, free of charge, to any person obtaining
|
||||||
|
a copy of this software and associated documentation files (the
|
||||||
|
"Software"), to deal in the Software without restriction, including
|
||||||
|
without limitation the rights to use, copy, modify, merge, publish,
|
||||||
|
distribute, sublicense, and/or sell copies of the Software, and to
|
||||||
|
permit persons to whom the Software is furnished to do so, subject to
|
||||||
|
the following conditions:
|
||||||
|
|
||||||
|
The above copyright notice and this permission notice shall be
|
||||||
|
included in all copies or substantial portions of the Software.
|
||||||
|
|
||||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||||
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||||
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||||
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||||
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
||||||
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
||||||
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
||||||
|
|
||||||
|
.text
|
||||||
|
.global breakpad_getcontext
|
||||||
|
.hidden breakpad_getcontext
|
||||||
|
.align 4
|
||||||
|
.type breakpad_getcontext, @function
|
||||||
|
|
||||||
|
breakpad_getcontext:
|
||||||
|
.cfi_startproc
|
||||||
|
|
||||||
|
/* Callee saved: RBX, RBP, R12-R15 */
|
||||||
|
movq %r12, MCONTEXT_GREGS_R12(%rdi)
|
||||||
|
movq %r13, MCONTEXT_GREGS_R13(%rdi)
|
||||||
|
movq %r14, MCONTEXT_GREGS_R14(%rdi)
|
||||||
|
movq %r15, MCONTEXT_GREGS_R15(%rdi)
|
||||||
|
movq %rbp, MCONTEXT_GREGS_RBP(%rdi)
|
||||||
|
movq %rbx, MCONTEXT_GREGS_RBX(%rdi)
|
||||||
|
|
||||||
|
/* Save argument registers (not strictly needed, but setcontext
|
||||||
|
restores them, so don't restore garbage). */
|
||||||
|
movq %r8, MCONTEXT_GREGS_R8(%rdi)
|
||||||
|
movq %r9, MCONTEXT_GREGS_R9(%rdi)
|
||||||
|
movq %rdi, MCONTEXT_GREGS_RDI(%rdi)
|
||||||
|
movq %rsi, MCONTEXT_GREGS_RSI(%rdi)
|
||||||
|
movq %rdx, MCONTEXT_GREGS_RDX(%rdi)
|
||||||
|
movq %rax, MCONTEXT_GREGS_RAX(%rdi)
|
||||||
|
movq %rcx, MCONTEXT_GREGS_RCX(%rdi)
|
||||||
|
|
||||||
|
/* Save fp state (not needed, except for setcontext not
|
||||||
|
restoring garbage). */
|
||||||
|
leaq MCONTEXT_FPREGS_MEM(%rdi),%r8
|
||||||
|
movq %r8, MCONTEXT_FPREGS_PTR(%rdi)
|
||||||
|
fnstenv (%r8)
|
||||||
|
stmxcsr FPREGS_OFFSET_MXCSR(%r8)
|
||||||
|
|
||||||
|
leaq 8(%rsp), %rax /* exclude this call. */
|
||||||
|
movq %rax, MCONTEXT_GREGS_RSP(%rdi)
|
||||||
|
|
||||||
|
movq 0(%rsp), %rax
|
||||||
|
movq %rax, MCONTEXT_GREGS_RIP(%rdi)
|
||||||
|
|
||||||
|
/* Save signal mask: sigprocmask(SIGBLOCK, NULL, &uc->uc_sigmask) */
|
||||||
|
leaq UCONTEXT_SIGMASK_OFFSET(%rdi), %rdx // arg3
|
||||||
|
xorq %rsi, %rsi // arg2 NULL
|
||||||
|
xorq %rdi, %rdi // arg1 SIGBLOCK == 0
|
||||||
|
call sigprocmask@PLT
|
||||||
|
|
||||||
|
/* Always return 0 for success, even if sigprocmask failed. */
|
||||||
|
xorl %eax, %eax
|
||||||
|
ret
|
||||||
|
.cfi_endproc
|
||||||
|
.size breakpad_getcontext, . - breakpad_getcontext
|
||||||
|
|
||||||
|
#elif defined(__riscv)
|
||||||
|
|
||||||
|
# define SIG_BLOCK 0
|
||||||
|
# define _NSIG8 8
|
||||||
|
# define __NR_rt_sigprocmask 135
|
||||||
|
|
||||||
|
.text
|
||||||
|
.globl breakpad_getcontext
|
||||||
|
.type breakpad_getcontext, @function
|
||||||
|
.align 0
|
||||||
|
.cfi_startproc
|
||||||
|
breakpad_getcontext:
|
||||||
|
REG_S ra, MCONTEXT_GREGS_PC(a0)
|
||||||
|
REG_S ra, MCONTEXT_GREGS_RA(a0)
|
||||||
|
REG_S sp, MCONTEXT_GREGS_SP(a0)
|
||||||
|
REG_S gp, MCONTEXT_GREGS_SP(a0)
|
||||||
|
REG_S tp, MCONTEXT_GREGS_TP(a0)
|
||||||
|
REG_S t0, MCONTEXT_GREGS_T0(a0)
|
||||||
|
REG_S t1, MCONTEXT_GREGS_T1(a0)
|
||||||
|
REG_S t2, MCONTEXT_GREGS_T2(a0)
|
||||||
|
REG_S s0, MCONTEXT_GREGS_S0(a0)
|
||||||
|
REG_S s1, MCONTEXT_GREGS_S1(a0)
|
||||||
|
REG_S a0, MCONTEXT_GREGS_A0(a0)
|
||||||
|
REG_S a1, MCONTEXT_GREGS_A1(a0)
|
||||||
|
REG_S a2, MCONTEXT_GREGS_A2(a0)
|
||||||
|
REG_S a3, MCONTEXT_GREGS_A3(a0)
|
||||||
|
REG_S a4, MCONTEXT_GREGS_A4(a0)
|
||||||
|
REG_S a5, MCONTEXT_GREGS_A5(a0)
|
||||||
|
REG_S a6, MCONTEXT_GREGS_A6(a0)
|
||||||
|
REG_S a7, MCONTEXT_GREGS_A7(a0)
|
||||||
|
REG_S s2, MCONTEXT_GREGS_S2(a0)
|
||||||
|
REG_S s3, MCONTEXT_GREGS_S3(a0)
|
||||||
|
REG_S s4, MCONTEXT_GREGS_S4(a0)
|
||||||
|
REG_S s5, MCONTEXT_GREGS_S5(a0)
|
||||||
|
REG_S s6, MCONTEXT_GREGS_S6(a0)
|
||||||
|
REG_S s7, MCONTEXT_GREGS_S7(a0)
|
||||||
|
REG_S s8, MCONTEXT_GREGS_S8(a0)
|
||||||
|
REG_S s9, MCONTEXT_GREGS_S9(a0)
|
||||||
|
REG_S s10, MCONTEXT_GREGS_S10(a0)
|
||||||
|
REG_S s11, MCONTEXT_GREGS_S11(a0)
|
||||||
|
REG_S t3, MCONTEXT_GREGS_T3(a0)
|
||||||
|
REG_S t4, MCONTEXT_GREGS_T4(a0)
|
||||||
|
REG_S t5, MCONTEXT_GREGS_T5(a0)
|
||||||
|
REG_S t6 , MCONTEXT_GREGS_T6(a0)
|
||||||
|
# ifndef __riscv_float_abi_soft
|
||||||
|
frsr a1
|
||||||
|
|
||||||
|
FREG_S ft0, MCONTEXT_FPREGS_FT0(a0)
|
||||||
|
FREG_S ft1, MCONTEXT_FPREGS_FT1(a0)
|
||||||
|
FREG_S ft2, MCONTEXT_FPREGS_FT2(a0)
|
||||||
|
FREG_S ft3, MCONTEXT_FPREGS_FT3(a0)
|
||||||
|
FREG_S ft4, MCONTEXT_FPREGS_FT4(a0)
|
||||||
|
FREG_S ft5, MCONTEXT_FPREGS_FT5(a0)
|
||||||
|
FREG_S ft6, MCONTEXT_FPREGS_FT6(a0)
|
||||||
|
FREG_S ft7, MCONTEXT_FPREGS_FT7(a0)
|
||||||
|
FREG_S fs0, MCONTEXT_FPREGS_FS0(a0)
|
||||||
|
FREG_S fs1, MCONTEXT_FPREGS_FS1(a0)
|
||||||
|
FREG_S fa0, MCONTEXT_FPREGS_FA0(a0)
|
||||||
|
FREG_S fa1, MCONTEXT_FPREGS_FA1(a0)
|
||||||
|
FREG_S fa2, MCONTEXT_FPREGS_FA2(a0)
|
||||||
|
FREG_S fa3, MCONTEXT_FPREGS_FA3(a0)
|
||||||
|
FREG_S fa4, MCONTEXT_FPREGS_FA4(a0)
|
||||||
|
FREG_S fa5, MCONTEXT_FPREGS_FA5(a0)
|
||||||
|
FREG_S fa6, MCONTEXT_FPREGS_FA6(a0)
|
||||||
|
FREG_S fa7, MCONTEXT_FPREGS_FA7(a0)
|
||||||
|
FREG_S fs2, MCONTEXT_FPREGS_FS2(a0)
|
||||||
|
FREG_S fs3, MCONTEXT_FPREGS_FS3(a0)
|
||||||
|
FREG_S fs4, MCONTEXT_FPREGS_FS4(a0)
|
||||||
|
FREG_S fs5, MCONTEXT_FPREGS_FS5(a0)
|
||||||
|
FREG_S fs6, MCONTEXT_FPREGS_FS6(a0)
|
||||||
|
FREG_S fs7, MCONTEXT_FPREGS_FS7(a0)
|
||||||
|
FREG_S fs8, MCONTEXT_FPREGS_FS8(a0)
|
||||||
|
FREG_S fs9, MCONTEXT_FPREGS_FS9(a0)
|
||||||
|
FREG_S fs10, MCONTEXT_FPREGS_FS10(a0)
|
||||||
|
FREG_S fs11, MCONTEXT_FPREGS_FS11(a0)
|
||||||
|
FREG_S ft8, MCONTEXT_FPREGS_FT8(a0)
|
||||||
|
FREG_S ft9, MCONTEXT_FPREGS_FT9(a0)
|
||||||
|
FREG_S ft10, MCONTEXT_FPREGS_FT10(a0)
|
||||||
|
FREG_S ft11, MCONTEXT_FPREGS_FT11(a0)
|
||||||
|
|
||||||
|
sw a1, MCONTEXT_FPC_CSR(a0)
|
||||||
|
# endif // __riscv_float_abi_soft
|
||||||
|
mv a1, zero
|
||||||
|
add a2, a0, UCONTEXT_SIGMASK_OFFSET
|
||||||
|
li a3, _NSIG8
|
||||||
|
mv a0, zero
|
||||||
|
li a7, __NR_rt_sigprocmask
|
||||||
|
ecall
|
||||||
|
mv a0, zero
|
||||||
|
ret
|
||||||
|
|
||||||
|
.cfi_endproc
|
||||||
|
.size breakpad_getcontext, . - breakpad_getcontext
|
||||||
|
|
||||||
|
#else
|
||||||
|
# error "This file has not been ported for your CPU!"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined(__aarch64__)
|
||||||
|
// ENABLE_PAUTH and ENABLE_BTI would be enabled at the definition
|
||||||
|
// of AArch64 specific breakpad_getcontext function
|
||||||
|
#if ENABLE_PAUTH || ENABLE_BTI
|
||||||
|
// for further information on the .note.gnu.property section see
|
||||||
|
// https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst#program-property
|
||||||
|
.pushsection .note.gnu.property, "a";
|
||||||
|
.balign 8
|
||||||
|
.long 4
|
||||||
|
.long 0x10
|
||||||
|
.long 0x5
|
||||||
|
.asciz "GNU"
|
||||||
|
.long 0xc0000000 /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */
|
||||||
|
.long 4
|
||||||
|
.long ((ENABLE_PAUTH)<<1) | ((ENABLE_BTI)<<0) /* PAuth and BTI */
|
||||||
|
.long 0
|
||||||
|
.popsection
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue