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POWhy doesn't the C program stack grow downward?
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copied!<p>Running the following program on gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3 and Intel(R) Core(TM)2 Duo CPU, I want to verify the c program stack grows downward, I write following code:</p> <pre><code> #include <stdio.h> #include <malloc.h> #include <string.h> static int a = 1; static int b; int c = 2; int d; void foo(void) { int *p1; int *p2; int *p3; int *p4; printf("&p1\t%p\n", &p1); printf("&p2\t%p\n", &p2); printf("&p3\t%p\n", &p3); printf("&p4\t%p\n", &p4); } int main() { static int e = 3; static int f; int g = 4; int h; char *str1 = "abc"; char *str2 = "abc"; char *str3; char *str4; printf("&\"abc\"\t%p\n", &"abc"); printf("&str1\t%p\n", &str1); printf("&str2\t%p\n", &str2); printf("str1\t%p\n", str1); printf("str2\t%p\n", str2); printf("&str3\t%p\n", &str3); printf("str3\t%p\n", str3); str4 = (char *)malloc(strlen("abc")*sizeof(char)); printf("&str4\t%p\n", &str4); printf("str4\t%p\n", str4); printf("&g\t%p\n", &g); printf("&h\t%p\n", &h); foo(); return 0; } </code></pre> <p>I get this result:</p> <pre><code> &"abc" 0x8048680 &str1 0xbff1be20 &str2 0xbff1be24 str1 0x8048680 str2 0x8048680 &str3 0xbff1be28 str3 0x8048599 &str4 0xbff1be2c str4 0x950f008 &g 0xbff1be18 &h 0xbff1be1c &p1 0xbff1bde0 &p2 0xbff1bde4 &p3 0xbff1bde8 &p4 0xbff1bdec </code></pre> <p>I find the addresses of str1, str2, str3, str4 grows upward, the addresses of p1, p2, p3, p4 grows upward too, not downward, why?</p>

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