diff options
Diffstat (limited to 'mdk-stage1/dietlibc/i386/getenv.S')
| -rw-r--r-- | mdk-stage1/dietlibc/i386/getenv.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/i386/getenv.S b/mdk-stage1/dietlibc/i386/getenv.S new file mode 100644 index 000000000..dafbf37ee --- /dev/null +++ b/mdk-stage1/dietlibc/i386/getenv.S @@ -0,0 +1,48 @@ +#include "PIC.h" + +.text +.global getenv +.type getenv,@function +getenv: + pushl %esi + pushl %edi + movl 0xc(%esp), %edi + cld + movl %edi, %edx + xorl %eax, %eax + leal -1(%eax), %ecx + repnz scasb + not %ecx + dec %ecx + pushl %ecx + movl (%edx), %ecx + + GET_1VAR environ, %esi # non-PIC: movl environ, %esi + jmp .Lloop + +.Lprepare: + movl (%edx), %ecx + movl %eax, %esi +.Lloop: + lodsl + or %eax, %eax + jz .Lout + cmpb %cl, (%eax) + jnz .Lloop + + movl %edx, %edi + xchg %esi, %eax + movl (%esp), %ecx + repz cmpsb + jne .Lprepare + or %ecx, %ecx + jnz .Lprepare + cmpb $'=', (%esi) + jne .Lprepare + leal 0x1(%esi), %eax +.Lout: + popl %ecx + popl %edi + popl %esi + ret +.size getenv, . - getenv |