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https://github.com/pkivolowitz/asm_book.git
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corrected error induced by post/pre increment to stack
This commit is contained in:
Perry Kivolowitz
parent
326fd2ea90
commit
c5143f19db
2 changed files with 100 additions and 100 deletions
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@ -1,103 +1,90 @@
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.section __TEXT,__text,regular,pure_instructions
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.build_version macos, 13, 0 sdk_version 13, 1
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.globl _LessSillyFunction ; -- Begin function LessSillyFunction
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.p2align 2
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_LessSillyFunction: ; @LessSillyFunction
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.arch armv8-a
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.file "nine_args.c"
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.text
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.section .rodata.str1.8,"aMS",@progbits,1
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.align 3
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.LC0:
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.string "This example hurts my brain: %ld\n"
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.text
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.align 2
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.global LessSillyFunction
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.type LessSillyFunction, %function
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LessSillyFunction:
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.LFB23:
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.cfi_startproc
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; %bb.0:
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sub sp, sp, #96
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stp x29, x30, [sp, #80] ; 16-byte Folded Spill
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add x29, sp, #80
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.cfi_def_cfa w29, 16
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.cfi_offset w30, -8
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.cfi_offset w29, -16
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stur x0, [x29, #-8]
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stur x1, [x29, #-16]
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stur x2, [x29, #-24]
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stur x3, [x29, #-32]
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str x4, [sp, #40]
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str x5, [sp, #32]
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str x6, [sp, #24]
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str x7, [sp, #16]
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ldr x8, [sp, #16]
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mov x9, sp
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str x8, [x9]
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adrp x0, l_.str@PAGE
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add x0, x0, l_.str@PAGEOFF
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bl _printf
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ldp x29, x30, [sp, #80] ; 16-byte Folded Reload
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add sp, sp, #96
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stp x29, x30, [sp, -16]!
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.cfi_def_cfa_offset 16
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.cfi_offset 29, -16
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.cfi_offset 30, -8
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mov x29, sp
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mov x2, x7
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adrp x1, .LC0
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add x1, x1, :lo12:.LC0
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mov w0, 1
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bl __printf_chk
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ldp x29, x30, [sp], 16
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.cfi_restore 30
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.cfi_restore 29
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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; -- End function
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.globl _SillyFunction ; -- Begin function SillyFunction
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.p2align 2
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_SillyFunction: ; @SillyFunction
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.LFE23:
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.size LessSillyFunction, .-LessSillyFunction
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.section .rodata.str1.8
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.align 3
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.LC1:
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.string "This example hurts my brain: %ld %ld\n"
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.text
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.align 2
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.global SillyFunction
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.type SillyFunction, %function
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SillyFunction:
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.LFB24:
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.cfi_startproc
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; %bb.0:
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sub sp, sp, #112
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stp x29, x30, [sp, #96] ; 16-byte Folded Spill
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add x29, sp, #96
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.cfi_def_cfa w29, 16
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.cfi_offset w30, -8
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.cfi_offset w29, -16
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ldr x8, [x29, #16]
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stur x0, [x29, #-8]
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stur x1, [x29, #-16]
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stur x2, [x29, #-24]
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stur x3, [x29, #-32]
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stur x4, [x29, #-40]
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str x5, [sp, #48]
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str x6, [sp, #40]
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str x7, [sp, #32]
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str x8, [sp, #24]
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ldr x10, [sp, #32]
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ldr x8, [sp, #24]
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mov x9, sp
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str x10, [x9]
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str x8, [x9, #8]
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adrp x0, l_.str.1@PAGE
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add x0, x0, l_.str.1@PAGEOFF
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bl _printf
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ldp x29, x30, [sp, #96] ; 16-byte Folded Reload
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add sp, sp, #112
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stp x29, x30, [sp, -16]!
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.cfi_def_cfa_offset 16
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.cfi_offset 29, -16
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.cfi_offset 30, -8
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mov x29, sp
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mov x2, x7
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ldr x3, [sp, 16]
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adrp x1, .LC1
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add x1, x1, :lo12:.LC1
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mov w0, 1
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bl __printf_chk
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ldp x29, x30, [sp], 16
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.cfi_restore 30
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.cfi_restore 29
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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; -- End function
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.globl _main ; -- Begin function main
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.p2align 2
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_main: ; @main
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.LFE24:
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.size SillyFunction, .-SillyFunction
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.align 2
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.global main
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.type main, %function
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main:
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.LFB25:
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.cfi_startproc
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; %bb.0:
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sub sp, sp, #32
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stp x29, x30, [sp, #16] ; 16-byte Folded Spill
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add x29, sp, #16
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.cfi_def_cfa w29, 16
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.cfi_offset w30, -8
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.cfi_offset w29, -16
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mov x9, sp
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mov x8, #9
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str x8, [x9]
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mov x0, #1
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mov x1, #2
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mov x2, #3
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mov x3, #4
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mov x4, #5
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mov x5, #6
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mov x6, #7
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mov x7, #8
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bl _SillyFunction
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mov w0, #0
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ldp x29, x30, [sp, #16] ; 16-byte Folded Reload
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add sp, sp, #32
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stp x29, x30, [sp, -16]!
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.cfi_def_cfa_offset 16
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.cfi_offset 29, -16
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.cfi_offset 30, -8
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mov x29, sp
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mov x3, 9
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mov x2, 8
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adrp x1, .LC1
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add x1, x1, :lo12:.LC1
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mov w0, 1
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bl __printf_chk
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mov w0, 0
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ldp x29, x30, [sp], 16
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.cfi_restore 30
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.cfi_restore 29
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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; -- End function
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.section __TEXT,__cstring,cstring_literals
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l_.str: ; @.str
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.asciz "This example hurts my brain: %ld\n"
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l_.str.1: ; @.str.1
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.asciz "This example hurts my brain: %ld %ld\n"
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.subsections_via_symbols
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.LFE25:
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.size main, .-main
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.ident "GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
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.section .note.GNU-stack,"",@progbits
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@ -1,19 +1,30 @@
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.text
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.global main
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/* Demonstration of using more than 8 arguments to a function. This
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demo is LINUX only as APPLE will put all arguments beyond the first
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one on the stack anyway.
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On LINUX, all parameters to a function beyond the eight go on the
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stack. The first 8 go in registers x0 through x7 as normal (for
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LINUX).
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*/
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SillyFunction:
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str x30, [sp, -16]!
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stp x29, x30, [sp, -16]! // Changes sp.
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mov x29, sp
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ldr x0, =fmt
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mov x1, x7
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ldr x2, [sp, 16]
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ldr x2, [sp, 16] // This does not alter the sp.
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bl printf
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ldr x30, [sp], 32
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ldp x29, x30, [sp], 16 // Undoes change to sp.
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ret
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main:
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str x30, [sp, -16]!
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stp x29, x30, [sp, -16]! // sp down total of 16.
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mov x29, sp
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mov x0, 9
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str x0, [sp, -16]!
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str x0, [sp, -16]! // sp down total of 32.
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mov x0, 1
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mov x1, 2
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mov x2, 3
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@ -23,7 +34,9 @@ main:
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mov x6, 7
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mov x7, 8
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bl SillyFunction
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ldr x30, [sp], 32
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add sp, sp, 16 // undoes change of sp by 16 due
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// to function call.
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ldp x29, x30, [sp], 16 // undoes change to sp of 16.
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ret
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.data
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