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target/m68k: Convert semihosting errno to gdb remote errno

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The semihosting abi used by m68k uses the gdb remote
protocol filesys errnos.

Acked-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-06-20 15:22:14 -07:00
parent 950272506d
commit 7327e60237
1 changed files with 31 additions and 2 deletions
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33
target/m68k/m68k-semi.c
View file

@ -41,6 +41,35 @@
#define HOSTED_ISATTY 12
#define HOSTED_SYSTEM 13
static int host_to_gdb_errno(int err)
{
#define E(X) case E##X: return GDB_E##X
switch (err) {
E(PERM);
E(NOENT);
E(INTR);
E(BADF);
E(ACCES);
E(FAULT);
E(BUSY);
E(EXIST);
E(NODEV);
E(NOTDIR);
E(ISDIR);
E(INVAL);
E(NFILE);
E(MFILE);
E(FBIG);
E(NOSPC);
E(SPIPE);
E(ROFS);
E(NAMETOOLONG);
default:
return GDB_EUNKNOWN;
}
#undef E
}
static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err)
{
M68kCPU *cpu = M68K_CPU(cs);
@ -48,7 +77,7 @@ static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err)
target_ulong args = env->dregs[1];
if (put_user_u32(ret, args) ||
put_user_u32(err, args + 4)) {
put_user_u32(host_to_gdb_errno(err), args + 4)) {
/*
* The m68k semihosting ABI does not provide any way to report this
* error to the guest, so the best we can do is log it in qemu.
@ -67,7 +96,7 @@ static void m68k_semi_u64_cb(CPUState *cs, uint64_t ret, int err)
target_ulong args = env->dregs[1];
if (put_user_u32(ret >> 32, args) ||
put_user_u32(ret, args + 4) ||
put_user_u32(err, args + 8)) {
put_user_u32(host_to_gdb_errno(err), args + 8)) {
/* No way to report this via m68k semihosting ABI; just log it */
qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
"discarded because argument block not writable\n");