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setexpr: Add explicit support for 32- and 64-bit ints

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At present this function assumes that a size of 4 refers to a ulong. This
is true on 32-bit machines but not commonly on 64-bit machines.

This means that the 'l' specify does not work correctly with setexpr.

Add an explicit case for 32-bit values so that 64-bit machines can still
use the 'l' specifier. On 32-bit machines, 64-bit is still not supported.

This corrects the operation of the default size (which is 4 for setexpr),
so update the tests accordingly.

The original code for reading from memory was included in 47ab5ad145
("cmd_setexpr: allow memory addresses in expressions") but I am not adding
a Fixes: tag since that code was not written with 64-bit machines in mind.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-11-01 14:15:37 -07:00 • committed by Tom Rini
parent 7526deec7e
commit 25a43ac84a
2 changed files with 13 additions and 9 deletions
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4
cmd/setexpr.c
View file

@ -39,6 +39,10 @@ static ulong get_arg(char *s, int w)
unmap_sysmem(p);
return val;
case 4:
p = map_sysmem(addr, sizeof(u32));
val = *(u32 *)p;
unmap_sysmem(p);
return val;
default:
p = map_sysmem(addr, sizeof(ulong));
val = *p;

18
test/cmd/setexpr.c
View file

@ -45,7 +45,7 @@ static int setexpr_test_int(struct unit_test_state *uts)
ut_assertok(run_command("setexpr.l fred 0", 0));
ut_asserteq_str("0", env_get("fred"));
ut_assertok(run_command("setexpr.l fred *0", 0));
ut_asserteq_str("ffffffff3456789a", env_get("fred"));
ut_asserteq_str("3456789a", env_get("fred"));
/* 64-bit */
*(u64 *)buf = 0x456789abcdef0123;
@ -58,7 +58,7 @@ static int setexpr_test_int(struct unit_test_state *uts)
ut_assertok(run_command("setexpr fred 0", 0));
ut_asserteq_str("0", env_get("fred"));
ut_assertok(run_command("setexpr fred *0", 0));
ut_asserteq_str("456789abcdef0123", env_get("fred"));
ut_asserteq_str("cdef0123", env_get("fred"));
unmap_sysmem(buf);
@ -90,7 +90,7 @@ static int setexpr_test_plus(struct unit_test_state *uts)
*(u32 *)buf = 0x3456789a;
*(u32 *)(buf + 0x10) = 0xc3384235;
ut_assertok(run_command("setexpr.l fred *0 + *10", 0));
ut_asserteq_str("fffffffef78ebacf", env_get("fred"));
ut_asserteq_str("f78ebacf", env_get("fred"));
/* 64-bit */
*(u64 *)buf = 0x456789abcdef0123;
@ -100,7 +100,7 @@ static int setexpr_test_plus(struct unit_test_state *uts)
/* default */
ut_assertok(run_command("setexpr fred *0 + *10", 0));
ut_asserteq_str("8eeebc2f407393a6", env_get("fred"));
ut_asserteq_str("1407393a6", env_get("fred"));
unmap_sysmem(buf);
@ -121,14 +121,14 @@ static int setexpr_test_oper(struct unit_test_state *uts)
/* Quote | to avoid confusing hush */
ut_assertok(run_command("setexpr fred *0 \"|\" *10", 0));
ut_asserteq_str("ffffffff00561234", env_get("fred"));
ut_asserteq_str("561234", env_get("fred"));
*(u32 *)buf = 0x561200;
*(u32 *)(buf + 0x10) = 0x1234;
/* Quote & to avoid confusing hush */
ut_assertok(run_command("setexpr.l fred *0 \"&\" *10", 0));
ut_asserteq_str("ffffffff00001200", env_get("fred"));
ut_asserteq_str("1200", env_get("fred"));
ut_assertok(run_command("setexpr.l fred *0 ^ *10", 0));
ut_asserteq_str("560034", env_get("fred"));
@ -137,13 +137,13 @@ static int setexpr_test_oper(struct unit_test_state *uts)
ut_asserteq_str("55ffcc", env_get("fred"));
ut_assertok(run_command("setexpr.l fred *0 * *10", 0));
ut_asserteq_str("ffa9dbd21ebfa800", env_get("fred"));
ut_asserteq_str("61ebfa800", env_get("fred"));
ut_assertok(run_command("setexpr.l fred *0 / *10", 0));
ut_asserteq_str("1", env_get("fred"));
ut_asserteq_str("4ba", env_get("fred"));
ut_assertok(run_command("setexpr.l fred *0 % *10", 0));
ut_asserteq_str("55ffcc", env_get("fred"));
ut_asserteq_str("838", env_get("fred"));
unmap_sysmem(buf);