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Fix semihosting_putc (#530)

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Per the Arm semihosting protocol documentation[1], the SYS_WRITEC command
expects *a pointer to* the character to be printed in r1, not the
character itself.

[1] https://developer.arm.com/documentation/dui0471/g/Semihosting/SYS-WRITEC--0x03-?lang=en
This commit is contained in:
Brian Starkey
2021-10-04 19:24:50 +01:00
committed by GitHub
parent eb42ecfaa5
commit a119b5bd9f
1 changed files with 2 additions and 2 deletions
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4
src/rp2_common/pico_stdio_semihosting/stdio_semihosting.c
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@ -18,7 +18,7 @@
// ); // );
//} //}
static void __attribute__((naked)) semihosting_putc(char c) { static void __attribute__((naked)) semihosting_putc(const char *c) {
__asm ( __asm (
"mov r1, r0\n" "mov r1, r0\n"
@ -31,7 +31,7 @@ static void __attribute__((naked)) semihosting_putc(char c) {
static void stdio_semihosting_out_chars(const char *buf, int length) { static void stdio_semihosting_out_chars(const char *buf, int length) {
for (uint i = 0; i <length; i++) { for (uint i = 0; i <length; i++) {
semihosting_putc(buf[i]); semihosting_putc(&buf[i]);
} }
} }