移植ucos出現 Error: registers may not be the same -- `strexh r3,r2,[r3]' 處理

╰半橙微兮° 2022-07-11 11:08 144阅读 0赞

移植ucos在gcc的編譯環境，出現以下錯誤

Error: C:\\Users\\jack\\AppData\\Local\\Temp\\cch0iNvt.s:869: Error: registers may not be the same -- \`strexh r3,r2,\[r3\]'

參考github代碼

[https://gist.github.com/timbrom/1942280][https_gist.github.com_timbrom_1942280]

修改core\_cm3.c文件解決該問題

From 7341a316c38a61cc745ce04e618916677007883b Mon Sep 17 00:00:00 2001
    From: Timothy Brom <thb@timbrom.com>
    Date: Wed, 29 Feb 2012 11:29:55 -0500
    Subject: [PATCH] Fixed error about strexh and strexb using the same register
    
    ---
     example/libs_stm/inc/core_support/core_cm3.c |    4 ++--
     1 files changed, 2 insertions(+), 2 deletions(-)
    
    diff --git a/example/libs_stm/inc/core_support/core_cm3.c b/example/libs_stm/inc/core_support/core_cm3.c
    index 56fddc5..0e8c3c4 100644
    --- a/example/libs_stm/inc/core_support/core_cm3.c
    +++ b/example/libs_stm/inc/core_support/core_cm3.c
    @@ -733,7 +733,7 @@ uint32_t __STREXB(uint8_t value, uint8_t *addr)
     {
        uint32_t result=0;
       
    -   __ASM volatile ("strexb %0, %2, [%1]" : "=r" (result) : "r" (addr), "r" (value) );
    +   __ASM volatile ("strexb %0, %2, [%1]" : "=&r" (result) : "r" (addr), "r" (value) );
        return(result);
     }
     
    @@ -750,7 +750,7 @@ uint32_t __STREXH(uint16_t value, uint16_t *addr)
     {
        uint32_t result=0;
       
    -   __ASM volatile ("strexh %0, %2, [%1]" : "=r" (result) : "r" (addr), "r" (value) );
    +   __ASM volatile ("strexh %0, %2, [%1]" : "=&r" (result) : "r" (addr), "r" (value) );
        return(result);
     }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xhbjEyMDU3NjY2NA_size_16_color_FFFFFF_t_70][]

[https_gist.github.com_timbrom_1942280]: https://gist.github.com/timbrom/1942280
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xhbjEyMDU3NjY2NA_size_16_color_FFFFFF_t_70]: /images/20220711/fce6f8e1322f441a811395e2392d5bc7.png