Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 1 | From 03a886252f6555d6b0af76b654e76459642b89da Mon Sep 17 00:00:00 2001 |
| 2 | From: Yunguo Wei <yunguo.wei@windriver.com> |
| 3 | Date: Tue, 3 Dec 2013 18:12:50 +0800 |
| 4 | Subject: [PATCH] pmtools: switch to dynamic buffer for huge ACPI tables |
| 5 | |
| 6 | For servers like Canoe Pass or Thunder Ridge, there are much more |
| 7 | entries in ACPI table, so original 1K buffer is insufficient. |
| 8 | |
| 9 | We switch to dynamic buffer on this situation. |
| 10 | |
| 11 | Signed-off-by: Yunguo Wei <yunguo.wei@windriver.com> |
| 12 | |
| 13 | |
| 14 | Upstream-Status: Pending |
| 15 | |
| 16 | Signed-off-by: Kai Kang <kai.kang@windriver.com> |
| 17 | --- |
| 18 | madt/madt.c | 18 +++++++++++++++++- |
| 19 | 1 file changed, 17 insertions(+), 1 deletion(-) |
| 20 | |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 21 | --- a/madt/madt.c |
| 22 | +++ b/madt/madt.c |
Andrew Geissler | 87f5cff | 2022-09-30 13:13:31 -0500 | [diff] [blame^] | 23 | @@ -34,14 +34,16 @@ typedef unsigned long long u64; |
| 24 | //#include <sys/mman.h> |
| 25 | #include <stdio.h> // fread |
| 26 | #include <stdlib.h> // malloc |
| 27 | +#include <string.h> // memset/memcpy |
| 28 | |
| 29 | #include "./tables.c" |
| 30 | |
| 31 | int verbose = 0; |
| 32 | /* |
| 33 | -/* read standard input |
| 34 | + * read standard input |
| 35 | * write decoded madt to standard output |
| 36 | */ |
| 37 | +size_t |
| 38 | get_next_entry(acpi_table_entry_header * entry_header) |
| 39 | { |
| 40 | size_t retval; |
| 41 | @@ -51,9 +53,11 @@ get_next_entry(acpi_table_entry_header * |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 42 | return retval; |
| 43 | } |
| 44 | |
| 45 | -u8 buffer[1024]; |
Andrew Geissler | 87f5cff | 2022-09-30 13:13:31 -0500 | [diff] [blame^] | 46 | |
| 47 | -main() |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 48 | +u8 buf[1024]; |
| 49 | +u8 *buffer = buf; |
Andrew Geissler | 87f5cff | 2022-09-30 13:13:31 -0500 | [diff] [blame^] | 50 | +int |
| 51 | +main(int argc, char *argv[]) |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 52 | { |
Andrew Geissler | 87f5cff | 2022-09-30 13:13:31 -0500 | [diff] [blame^] | 53 | size_t retval; |
| 54 | struct acpi_table_madt *madt_header; |
| 55 | @@ -75,6 +79,17 @@ main() |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 56 | |
| 57 | if (verbose) printf("header.length %d\n", madt_header->header.length); |
| 58 | |
| 59 | + /* if 1K buffer is insufficient for acpi table, switch to a larger memory buffer */ |
| 60 | + if(expected_length > sizeof(buf)) { |
| 61 | + buffer = malloc(expected_length); |
| 62 | + if (!buffer) { |
| 63 | + perror("malloc"); |
| 64 | + exit(1); |
| 65 | + } |
| 66 | + memset(buffer, 0, expected_length); |
| 67 | + memcpy(buffer, buf, sizeof(struct acpi_table_madt)); |
| 68 | + } |
| 69 | + |
| 70 | acpi_table_print((void*)&(buffer[bytes_read]), 0); |
| 71 | |
| 72 | bytes_read = sizeof(struct acpi_table_madt); |
Andrew Geissler | 87f5cff | 2022-09-30 13:13:31 -0500 | [diff] [blame^] | 73 | @@ -118,6 +133,9 @@ done: |
Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 74 | printf("Checksum 0x%x != 0; 0x%x in header ERROR\n", csum, |
| 75 | madt_header->header.checksum); |
| 76 | |
| 77 | + if(buffer != buf) |
| 78 | + free(buffer); |
| 79 | + |
| 80 | return 0; |
| 81 | } |
| 82 | |