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95 lines
1.6 KiB
95 lines
1.6 KiB
6 years ago
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.file "env1.c"
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.text
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.comm env,8,8
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.section .rodata
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.LC0:
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.string "----------------------\n"
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.LC1:
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.string "USER"
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.LC2:
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.string "USER =%s\n"
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.LC3:
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.string "test"
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.LC4:
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.string "USER=%s\n"
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.LC5:
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.string "env2"
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.LC6:
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.string "./env2"
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.text
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.globl main
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.type main, @function
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main:
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.LFB0:
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.cfi_startproc
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset 6, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register 6
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subq $48, %rsp
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movq %fs:40, %rax
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movq %rax, -8(%rbp)
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xorl %eax, %eax
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movq environ(%rip), %rax
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movq %rax, env(%rip)
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jmp .L2
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.L3:
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movq environ(%rip), %rax
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movq (%rax), %rax
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movq %rax, %rdi
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call puts@PLT
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movq environ(%rip), %rax
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addq $8, %rax
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movq %rax, environ(%rip)
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.L2:
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movq environ(%rip), %rax
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movq (%rax), %rax
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testq %rax, %rax
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jne .L3
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leaq .LC0(%rip), %rdi
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call puts@PLT
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leaq .LC1(%rip), %rdi
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call getenv@PLT
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movq %rax, -40(%rbp)
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cmpq $0, -40(%rbp)
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je .L4
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movq -40(%rbp), %rax
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movq %rax, %rsi
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leaq .LC2(%rip), %rdi
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movl $0, %eax
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call printf@PLT
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.L4:
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movl $1, %edx
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leaq .LC3(%rip), %rsi
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leaq .LC1(%rip), %rdi
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call setenv@PLT
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leaq .LC1(%rip), %rdi
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call getenv@PLT
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movq %rax, %rsi
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leaq .LC4(%rip), %rdi
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movl $0, %eax
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call printf@PLT
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leaq .LC5(%rip), %rax
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movq %rax, -32(%rbp)
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movq $0, -24(%rbp)
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movq env(%rip), %rdx
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leaq -32(%rbp), %rax
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movq %rax, %rsi
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leaq .LC6(%rip), %rdi
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call execve@PLT
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movl $0, %eax
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movq -8(%rbp), %rcx
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xorq %fs:40, %rcx
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je .L6
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call __stack_chk_fail@PLT
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.L6:
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leave
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.cfi_def_cfa 7, 8
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ret
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.cfi_endproc
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.LFE0:
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.size main, .-main
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.ident "GCC: (Alpine 8.2.0) 8.2.0"
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.section .note.GNU-stack,"",@progbits
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