From: Gautam Bhat <mindentropy@gmail.com>
To: QEMU Developers <qemu-devel@nongnu.org>
Subject: How does "rsi" get set in x86 prologue?
Date: Thu, 2 Jan 2025 00:56:47 +0530 [thread overview]
Message-ID: <CAM2a4uxJFhw71emxdZrB4SF-JSzJy_-bL=g9ke7OmjUoOXUDYQ@mail.gmail.com> (raw)
I am trying to understanding the generated code for the x86 target. On
EPILOGUE code below:
0x7fff98000000: 55 pushq %rbp
0x7fff98000001: 53 pushq %rbx
0x7fff98000002: 41 54 pushq %r12
0x7fff98000004: 41 55 pushq %r13
0x7fff98000006: 41 56 pushq %r14
0x7fff98000008: 41 57 pushq %r15
0x7fff9800000a: 48 8b ef movq %rdi, %rbp
0x7fff9800000d: 48 81 c4 78 fb ff ff addq $-0x488, %rsp
0x7fff98000014: ff e6 jmpq *%rsi
0x7fff98000016: 33 c0 xorl %eax, %eax
0x7fff98000018: 48 81 c4 88 04 00 00 addq $0x488, %rsp
0x7fff9800001f: c5 f8 77 vzeroupper
0x7fff98000022: 41 5f popq %r15
0x7fff98000024: 41 5e popq %r14
0x7fff98000026: 41 5d popq %r13
0x7fff98000028: 41 5c popq %r12
0x7fff9800002a: 5b popq %rbx
0x7fff9800002b: 5d popq %rbp
0x7fff9800002c: c3 retq
Can someone help me understand in which file or where in the source
does the "rsi" get set to jump? (0x7fff98000014: ff e6 jmpq
*%rsi)
Thanks,
Gautam.
next reply other threads:[~2025-01-01 19:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-01 19:26 Gautam Bhat [this message]
2025-01-02 10:15 ` How does "rsi" get set in x86 prologue? Alex Bennée
2025-01-30 15:34 ` Gautam Bhat
2025-01-31 12:58 ` Alex Bennée
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